R&D GREET 2023 updates, December 21st 2023

R&D GREET® .Net 2023 DOI: 10.11578/GREET-Net-2023/dc.20230907.2

I. Software v1.3.0.14168

  • Bug fixes and software improvements to make R&D GREET.Net more reliable and user-friendly

II. Database v14168

  • Updated CO2 capture and compression energy demand from different CO2 sources in the e-fuel tab.
  • Updated methane leakage rates of the natural gas supply chain.
  • Added a pathway for synthetic natural gas (SNG) produced from low-carbon hydrogen and captured carbon dioxide, including SNG transmission and distribution.
  • Added new production pathways for five fossil-based and eight bio-based chemicals.
  • Included a new allocation method in the steam cracking process that can be employed to allocate the impacts of the cracker operation entirely to the set of “target products”.
  • Added new pathways for converting post-use plastic (PUP) to new plastic via co-feeding of PUP-based pyrolysis oil with fossil petrochemical-derived feedstock.
  • Added new animal feed ingredients including alfalfa feed for mature cows, alfalfa feed for immature cows, corn silage, cotton feed, and corn cob.
  • Updated an FT fuel production integrated with nuclear power generation pathway by adding an option to select whether or not steam is exported.
  • Added a pathway for Ni/Al2O3 catalyst production for biofuel production.
  • Updated NG-based ammonia production pathways by considering that all the vent gas containing methane is combusted.
  • Updated two DAC pathways: High temperature (HT) absorption-based DAC and cryogenic carbon capture.
  • Added a pathway for Fischer-Tropsch (FT) renewable diesel produced by Tri-reforming and Fischer-Tropsch synthesis of landfill gas (LFG).
  • Added well-to-wheel analysis of a large agricultural tractor with several powertrain and fuel/electricity production pathways.
  • Updated fuel economy and vehicle energy consumption of light-, medium-, and heavy-duty vehicles based on the latest simulation results from Argonne’s Autonomie.
  • Added natural gas to methanol pathway in which hydrogen is a coproduct.
  • Added ammonia for marine fuel use pathways from waste-based RNG, e.g., sewage sludge, swine manure, food waste, and FOG, pathways from hydrogen source options include coal gasification with CCS, poplar gasification, and PEM electrolysis with renewable energy, and corresponding ammonia transportation and distribution pathway.
  • Updated use-phase analysis of two alternative marine fuels (methanol and ammonia) using the up-to-date industry energy/emissions data and literature-based assumptions.
  • Updated the nuclear fuel cycle in GREET to reflect current operating conditions of light water reactor nuclear reactors and the uranium supply chain in the U.S.
  • Updated the fertilizer and herbicide production life cycle inventory, and the herbicide ingredient mixes for major crops in the U.S.
  • Updated N2O emission modeling of 4R practice in the FD-CIC.
  • Updated the inventory for Brazilian sugarcane farming and ethanol production, based on data collected through RenovaBio program from year 2019/2020.
  • Updated payload of a heavy heavy-duty truck to transport corn from the field to ethanol plant. Updated the on-farm fertilizer and pesticide usage inventory for corn and soybean based on USDA NASS database.
  • Added new saline water algal biomass cultivation and hydrothermal liquefaction biofuel conversion pathway with high-protein coproduct.
  • Added new pathways for soybean protein concentrate, whey concentrate, and alfalfa meal, which can be replaced by algal high-protein coproduct.
  • Updated CO2 capture and transport options in algae tab based on NETL and IECM data sources.
  • Added AEZ-EF SOC modeling, besides CENTURY-based modeling, to CCLUB for biofuel LUC GHG simulations.
  • Added hydrogen production via methane pyrolysis using NG and RNG pathways for central plants.
  • Added electrolyzer embodied emissions option for hydrogen production via low temperature PEM electrolysis and high temperature SOEC electrolysis.
  • Added capture and utilization of coal mine methane for several downstream end use pathways.
  • Updated the modeling of MSW landfilling and added incineration, composting, and anaerobic digestion to business-as-usual MSW management practices.
  • Updated animal manure management pathways.
  • Added renewable gas (RNG) to methanol pathways (hydrogen as a coproduct) with four different waste feedstock options (wastewater sludge, swine manure, food waste, and fats, oil, and grease) for RNG production.
  • Changed the energy source used for RNG production from in-situ RNG to fossil NG and grid electricity.
  • Added vehicle cycle analysis of a large agricultural tractor considering several powertrains, as well as full cradle to grave life cycle analysis using the well-to-wheel results from R&D GREET1.
  • Added embodied emissions for small modular reactors and multi-purpose canisters for spent nuclear fuel disposal.
  • Expanded the end-of-life recycling capabilities of R&D GREET2 by including additional materials for such evaluation.
  • Updated the nickel production inventory from laterite ores by disaggregating it across different process stages and updated SOx emissions for nickel production from sulfide ores based on available data.
  • Incorporated inventory for US-domestic lithium-chemical production (Li2CO3 and LiOH) from sedimentary ores and brines (via direct lithium extraction) based on prefeasibility studies from commercial producers.
  • Incorporated the inventory and environmental impacts associated with lithium-ion battery recycling across multiple cathode chemistries and recycling technologies from Argonne’s EverBatt model into R&D GREET, providing users the capability to determine environmental impacts as a function of share of cathode/cathode precursor production from virgin and recycled feedstocks.
  • Updated the bill-of-materials of the balance-of-plant systems for three electrolyzer technologies (solid oxide, alkaline, and proton exchange membrane) to provide a comprehensive assessment of their embodied emissions in the context of hydrogen production.
  • Updated the bill-of-materials for lithium-ion batteries for light-, medium-, and heavy-duty vehicles based on the most recent version of Argonne’s BatPaC model (BatPaC 5.1).
  • Updated vehicle mass and characteristics of light-, medium-, and heavy-duty vehicles based on the latest simulation results from Argonne’s Autonomie.
  • Enhanced vehicle modeling in R&D GREET2 through the utilization of sheet and extruded aluminum in place of the prior wrought aluminum aggregation.
  • Developed a battery module which serves as a user-friendly dashboard to examine existing lithium ion batteries in R&D GREET in a single location to evaluate and compare their environmental impacts.

R&D GREET 2022 updates, March 24th 2023

R&D GREET® .Net 2022 DOI: 10.11578/GREET-Net-2022/dc.20220908.2

Database v14024

  • Added hydrogen autothermal reforming with CCS using NG and RNG pathways
  • Added standalone SMR using RNG pathways for both central and distributed hydrogen production
  • Updated the share of primary aluminum, secondary aluminum, and scrap used to produce various semi-fabricated (extruded and rolled) aluminum products
  • Updated the list of lithium-ion battery chemistries relevant to electrified vehicles
  • Updated the Hydroprocessed Esters and Fatty Acids (HEFA) or Hydroprocessed Renewable Jet (HRJ) to use the latest fuel production data collected through the industry survey

R&D GREET 2022 updates, November 1st 2022

R&D GREET® .Net 2022 DOI: 10.11578/GREET-Net-2022/dc.20220908.2

Database v14000

  • Refined the parameters in sustainable aviation fuel production pathways
  • Added the Poly-alpha Olefins (PAO) - synthetic lubricants production pathway

R&D GREET 2022 updates, October 11th 2022

R&D GREET® .Net 2022 DOI: 10.11578/GREET-Net-2022/dc.20220908.2

I. Software v1.3.0.13991

  • Bug fixes and software improvements to make R&D GREET.Net more reliable and user-friendly

II. Database v13991

  • Updated key hydrogen production pathways based on latest literature data and industry data
  • Updated transportation modes of gaseous and liquid hydrogen to trucking and updated losses associated with the liquid hydrogen delivery
  • Expanded the e-fuel tab to include various CO2 sources for fuel production and updated the parameters for CO2 transportation
  • Created a Macroalgae tab to characterize the life cycle energy and environmental effects of offshore macroalgae production (under review)
  • Added five new marine fuel pathways—two partially upgraded biocrudes from waste feedstocks (sludge and manure) via hydrothermal liquefaction, three marine biooils from woody biomass feedstock via fast pyrolysis or catalytic fast pyrolysis
  • Added Supply Chain Sustainability Analysis (SCSA) results of the 2021 state of technology (SOT) of five biofuel production pathways via a range of conversion technologies
  • Add biodiesel (BD) and renewable diesel (RD) production from used cooking oil. Updated parameters for tallow rendering
  • Updated process yields, energy requirements and water consumption of post-use plastic (PUP) pyrolysis conversion to produce ultra-low sulfur diesel and added estimations for pyrolysis conversion of PUP to pyrolysis oil
  • Added waste-to-PLA conversion pathways using three different waste feedstocks, and updated the end-of-life PLA process including the landfill gas collection and oxidation rates
  • Added a sustainability analysis framework for the estimation of life-cycle impacts of implementing circular economy strategies in the supply chain of PET Bottles
  • Expanded the Feedstock Carbon Intensity Calculator (FD-CIC) for the carbon intensity calculation of international feedstocks (i.e., Canadian corn and Brazilian sugarcane) and of land management practices for corn farming
  • Updated conventional and green ammonia production pathways and expanded the pathways to include natural gas-based ammonia production with carbon capture and storage, also known as “blue” ammonia production
  • Added pathways for synthetic lubricant production from conventional petrochemical process (using ethylene as feedstock) as well as from a post-use plastic (PUP) upcycling approach, detailing the emissions and energy use for each pathway
  • Added the global warming potential (GWP) values based on the sixth assessment (AR6) of the Intergovernmental Panel on Climate Change (IPCC)
  • Updated the projection of crude oil and electricity mixes based on Annual Energy Outlook 2022 by Energy Information Administration
  • Updated methane leakage and fuel consumption rates of the natural gas supply chain
  • Updated the rail module to provide the WTW emissions for diesel and electric operation separately for intercity and commuter rails
  • Updated the feedstock slate of steam crackers in the United States
  • Updated the analysis for embodied emissions of renewable and nuclear power infrastructure to reflect recent technological progress and production status
  • Updated the material composition of traction motors, electronic controllers, and lithium-ion batteries for light-, medium-, and heavy-duty vehicles across conventional hybrid, plug-in hybrid, electric, and fuel-cell powertrains
  • Updated and expanded the characterization of battery anode materials for lithium-ion batteries including natural and synthetic graphite, silicon, and lithium metal
  • Added a preliminary lithium carbonate (Li2CO3) and lithium hydroxide (LiOH) production pathways considering US domestic lithium produced sourced from geothermal brines and processed via direct lithium extraction
  • Added or updated material and energy flows for producing nickel, copper, titanium, and rare-earth elements each of which are considered critical materials
  • Added the End-of-Life Recycling methodology for steel and aluminum to complement the existing Recycled Content methodology when accounting for the impacts of primary and secondary materials
  • Updated the energy and material flows associated with the production of primary and secondary aluminum in several product forms
  • Added detailed bill-of-materials for electrolyzer stack systems for three types of technologies (alkaline, proton exchange membrane, and solid oxide)

R&D GREET 2021 updates, January 13th 2022

R&D GREET® .Net 2021 DOI: 10.11578/GREET-Net-2021/dc.20210903.1

Database v13868

  • Corrected carbon accounting in waste-derived renewable natural gas pathways
  • Incorporated 20-year global warming potential of species so that GHG-20 results are provided in the model

R&D GREET 2021 updates, October 11th 2021

R&D GREET® .Net 2021 DOI: 10.11578/GREET-Net-2021/dc.20210903.1

I. Software v1.3.0.13857

  • Bug fixes and software improvements to make R&D GREET.Net more reliable and user-friendly

II. Database v13857

  • Updated corn farming and corn ethanol production pathways using the data from USDA and industry biorefinery benchmarking data
  • Updated ethanol yield, co-produced electricity, and material inputs of cellulosic ethanol production pathways with feedstocks including corn stover, switchgrass, miscanthus, forest residue, willow, poplar, forage sorghum, and the biogenic portion of municipal solid waste
  • Updated farming inputs and on-farm energy consumption for production of corn and soybeans based on data from most recent USDA farm survey and reported them in farming inputs per acre and yields of corn and soybeans (separately) per acre
  • Expanded the Feedstock Carbon Intensity Calculator (FD-CIC) by adding soybeans, sorghum, and rice besides corn
  • Updated fuel economy and emissions factors for criteria air pollutants for light-, medium-, and heavy-duty vehicles per latest Argonne Autonomie simulations and EPA MOVES modeling
  • Added eight fuel production pathways for use in engines co-optimized with drop-in biofuel blends for improving engine efficiency and reducing engine-out emissions
  • Added an engine efficiency gain calculation module for the drop-in biofuel blends for gasoline engines
  • Added new production pathways for nine fossil-based chemicals that are relevant to downstream processes for plastics production or recycling
  • Renamed the Chemicals tab as a “Steam_Cracking” tab as the analysis framework in this tab is for production of olefins, aromatics, and hydrogen from natural gas liquids (NGL) and petroleum naphtha steam cracking plants
  • Renamed the former Bioproducts tab as a “Chemicals” tab as it contains pathways for both fossil and bio-derived chemicals
  • Added five new fossil-based resin production pathways in the new Plastics tab
  • Added three new production pathways for a bio-based resin, or polyethylene furanoate (PEF)
  • Added two new catalysts for biofuel production (Pd/NbOPO4 and ZrO2) to the Catalyst tab, as well as four additional materials associated with the catalysts’ production (Nb2O5, KNbO3, NbOPO4, and zircon)
  • Added direct air capture (DAC) as a CO2 source option in the E-fuel tab
  • Updated default methane leakage rates of the natural gas supply chain that is now based on a hybrid approach with top-down and bottom-up methane leakage data from two recent studies; changed the original default bottom-up leakage rates in previous GREET from EPA greenhouse gas emission inventory as an alternative case
  • Added five new novel marine fuel pathways to the Marine Fuels module
  • Added a new module on forest residue to bio-electricity. It supports regional LCA of bio-electricity for 12 states
  • Added a new module on co-processing of bio-feedstocks in petroleum refineries with placeholder parameters which will be updated in a new version of GREET
  • Restructured the RNG tab to present the impact of current waste management and waste-to-energy pathways separately
  • Added eight sustainable aviation fuel (SAF) production pathways using the data in the CORSIA supporting document released by ICAO
  • Updated the Rail Module for energy use intensities and emission factors by rail type for 2020-2050 for diesel, electric, and alternative fuel locomotives
  • Updated U.S. railroad operational characteristics including rail ton-miles, total tonnage. Total mileage, average Tons/car, and total diesel use for different commodity types
  • Expanded hydrogen pathways to include both gaseous and liquid hydrogen as a fuel supply source for fuel cell locomotives
  • Added the vehicle-cycle analysis of three medium- and heavy-duty vehicles (MHDVs) (Class 8 long-haul trucks; Class 8 short-haul combination trucks; and Class 6 pickup-and-delivery truck) with four powertrains (ICEV, HEV, EV, and FCV)
  • Updated carbon fiber life-cycle inventory for process energy and emission details of each step of carbon fiber LCA
  • Added electrolytic manganese metal within manganese production pathway
  • Provided detailed production pathway data for lithium (lithium carbonate and lithium hydroxide) from Chilean brine and Australian spodumene
  • Added time-series data for weight and power/energy parameters for car, SUV and pickup truck to expand the cradle-to-grave analysis over time
  • Updated the production of platinum-group metals (PGMs) that includes platinum, palladium, ruthenium, and gold

R&D GREET 2020 updates, October 9th 2020

R&D GREET® .Net 2020 DOI: 10.11578/GREET-Net-2020/dc.20200913.1

I. Software v1.3.0.13656

  • Bug fixes and software improvements to make R&D GREET.Net more reliable and user-friendly

II. Database v13656

  • Life-cycle analysis of electro-fuels (e-fuels) using high-purity CO2 from ethanol production with renewable electricity and low-carbon hydrogen to produce additional ethanol
  • A new Feedstock Carbon Intensity Calculator (FD-CIC) for farm-level carbon intensity calculation of corn produced as bioethanol feedstock
  • Added low-carbon ammonia (green ammonia) production pathways using N2 from air separation technologies and H2 from renewable and industrial by-product sources
  • Added four pathways for performance-enhancing, drop-in biofuel blends that improve engine efficiency for spark ignited engines and reduce engine out emissions for compression ignition engines: isobutanol, aromatic rich hydrocarbon, renewable diesel via HTL of wet wastes and renewable diesel via HTL algae/woody blend
  • Expanded the marine module to include six methanol pathways for its production from natural gas, flare gas, biomass, renewable natural gas, coal, and black liquor
  • Updated electricity generation efficiencies, criteria air pollutant emission factors, generation fuel/technology mixes, and transmission and distribution loss rate by region (national level, NERC level, and state level)
  • Updated GREET modeling time horizon through 2050
  • Expanded GREET open-source database for spatiotemporal crop/soil/climate data to support U.S. county-level modeling of soil carbon changes in CCLUB
  • Updated the current land management change (LMC)-driven soil carbon emission factors in CCLUB and accordingly revised LMC emissions from corn stover ethanol pathways in GREET
  • Added waste-to-energy and waste-to-product pathways for renewable diesel production via hydrothermal liquefaction; renewable natural gas production via anaerobic digestion; and lactic acid production via arrested anaerobic digestion
  • Added a palm fatty acid distillate (PFAD) pathway for renewable diesel production
  • Added pathways for animal feed production including formulations of soybean meal, corn, distiller-dried grains with solubles (DDGS), and synthetic amino acids for swine and poultry production
  • Updated pine growth curves and developed probability density functions of , energy use of pine production and pine residue availability for biofuel conversion to address uncertainty of woody biomass LCA and temporal effects
  • Added energy demand for capturing and delivery of high-purity CO2 for algae growth
  • Updated vehicle material composition for cars, SUVs, and pickup trucks for all powertrains (ICEV, HEV, PHEV, BEV, and FCEV)
  • Added new lithium ion battery cathode chemistry
  • Updated the bill of materials for lithium ion batteries, and updated the energy density for lithium ion batteries
  • Added production pathways for lithium carbonate and lithium hydroxide from spodumene ore as well as lithium brine
  • Updated virgin Class I nickel production and added new pathways for battery-grade nickel sulfate production

R&D GREET 2019 updates, October 4th 2019

R&D GREET® .Net 2019 DOI: 10.11578/GREET-Net-2019/dc.20200706.2

I. Software v1.3.0.13520

  • Bug fixes to make R&D GREET.Net more reliable

II. Database v13520

  • Added new bio-derived plastic pathways for polylactic acid (PLA) and polyethylene terephthalate (PET) production
  • Updated CCLUB and the direct nitrogen fertilizer-induced nitrous oxide (N2O) emission factor
  • Incorporated a new database, the Regional Soil Carbon Observations for Renewable Energy and Agriculture (ReSCORE-A), that refines estimates of soil organic carbon (SOC) changes in CCLUB
  • Updated the combustion and non-combustion emission factors of petroleum production pathways, and added four pathways for propane, butane, asphalt, and propylene
  • Updated energy efficiency as well as combustion and non-combustion emission factors for hydrogen production pathways using steam methane reforming (SMR) of natural gas
  • Added pathways for various classes of medium- and heavy-duty battery electric vehicles (BEVs) and updated the fuel economy values for baseline diesel ICEVs and hydrogen fuel cell electric vehicles (FCEVs)
  • Expanded battery LCA modelling using regional supply chain data
  • Expanded the marine module with pathways of low-sulfur conventional fuels, liquefied natural gas, and biofuels
  • Updated the cement and concrete pathways with inventories based on process unit datasets
  • Updated methane emissions throughout natural gas supply chain

R&D GREET 2018 updates, October 10th 2018

R&D GREET® .Net 2018 DOI: 10.11578/GREET-Net-2018/dc.20200803.8

I. Software v1.3.0.13395

  • Bug fixes to make R&D GREET.Net more reliable

II. Database v13395

  • Added pathways for by-product hydrogen production from steam crackers
  • Added hydrogen fuel-cell electric transit bus technology
  • Added three bio-derived products: bio-ethylene oxide, bio-ethylene glycol, and bio-terephthalic acid
  • Updated CCLUB and added the U.S. average tillage practice calculating soil organic carbon change at a national level
  • Updated the land use change scenarios of soy biodiesel in CCLUB to reflect updates in emissions associated with peatland loss in Southeast Asia
  • Updated algae biofuel pathways: combined algae processing and hydrothermal liquefaction
  • Updated high-octane gasoline via indirect liquefaction
  • Added a pathway for renewable hydrocarbon fuels produced from ex-situ catalytic fast pyrolysis using a blend of logging residues and clean pine
  • Updated refined metallic cobalt and cobalt chemical production pathways
  • Updated the bill-of-materials of lithium-ion batteries (LIBs) for electric vehicles
  • Updated life-cycle inventory for the production of LIB cathode materials including lithium cobalt oxide, lithium nickel cobalt manganese oxide, and lithium nickel cobalt aluminium oxide
  • Updated the projection of fuel economy for light duty vehicles based on output from Autonomie vehicle simulation Model
  • Updated methane leakage of natural gas supply chain
  • Updated vented, flaring, and fugitive emissions associated with crude oil production
  • Updated electricity transmission and distribution losses
  • Updated regional U.S. electricity generation mix based on most recent Energy Information Administration (EIA)’s Annual Energy Outlook data
  • Updated the projection of crude oil mix to U.S. refineries based on EIA and Canadian Association of Petroleum Producers (CAPP)
  • Updated the energy intensities of transportation and distribution by rail, barge, and truck
  • Updated the biogenic CO2 emission credits of biodiesel to exclude carbon from fossil-derived methanol
  • Added carinata-derived jet fuel production via hydroprocessed esters and fatty acid (HEFA)

R&D GREET 2017 updates, October 9th 2017

R&D GREET® .Net 2017 DOI: 10.11578/GREET-Net-2017/dc.20200803.9

I. Software v1.3.0.13239

  • Bug fixes to make R&D GREET.Net more reliable

II. Database v13239

  • Added plastic-to-Fuel (PTF) pathway.
  • Added biomass-derived high octane gasoline via indirect liquefaction and renewable gasoline/diesel pathways from fast pyrolysis.
  • Added new pathways for corn kernel fiber ethanol.
  • Updated CCLUB to include added four land use change (LUC) cases and associated soil organic carbon change (SOC) updates related to soybean biodiesel pathways.
  • Updated the emission factors of criteria air pollutant (combustion and non-combustion emissions) for SMR hydrogen and petroleum fuels.
  • Added new pathways for by-product hydrogen produced from chlor-alkali processes.
  • Implemented new pathways for fuel cell electric medium- and heavy-duty vehicles powered by gaseous hydrogen.
  • Expanded the power sector in GREET with several natural gas and coal combined heat and power (CHP) and carbon capture and storage (CCS) technologies.
  • Updated the fuel economy and vehicle weights of light duty vehicles.
  • Added LCI data for the production of new and recycled cathode material for batteries of electric vehicles. Also updated energy and water consumption for lithium-ion battery manufacturing.
  • Developed distribution functions for water consumption factors of major processes in GREET.
  • Added production pathway of the low octane gasoline-like fuel (LOF) and corresponding vehicle technology of gasoline compression ignition (GCI) engines.
  • Updated methane leakage emissions for natural gas pathways.
  • Updated U.S. electricity generation mix based on most recent Energy Information Administration (EIA)’s Annual Energy Outlook (AEO).
  • Updated the inventory and process data of soybean farming, soy oil extraction, and vegetable oil transesterification processes.
  • Updated the inventory data of tallow rendering and high free fatty acid (FFA) oil transesterification processes associated with tallow biodiesel pathway.
  • Updated energy consumption and material efficiency for steel and Aluminum stamping.

Major update: R&D GREET 2016 October 7th 2016

R&D GREET® .Net 2016 DOI: 10.11578/GREET-Net-2016/dc.20200803.10

I. Software v1.3.0.13081

  • Scenario Manager
  • Revision control capability
  • Mapping support
  • Enhanced Stochastic Simulator

II. Database v13078

  • Updated water consumption factors for the refining processes of petroleum fuels, thermoelectric and hydroelectric power generation, and hydrogen production processes.
  • Updated high-octane-fuel (HOF, with research octane number of 100) pathways in GREET with E10, E25, and E40 ethanol blends.
  • Developed new pathways for hydrogen production from dark fermentation of lignocellulosic biomass, high temperature steam electrolysis, and reforming of bio-derived liquids.
  • Expanded and updated wastewater sludge-derived fuels and waste-to-energy pathways.
  • Updated CCLUB to include N2O emissions associated with LUC GHG emissions for ethanol production scenarios.
  • Updated emission factors for agricultural equipment and nonroad emissions.
  • Updated DME production from fossil natural gas, natural gas-derived methanol, and renewable feedstocks.
  • Updated the fuel economy and material composition of the light duty vehicles.
  • Added bio-based ethanol-to-jet pathways from corn and cellulosic biomass, and sugar-to-jet from cellulosic biomass.
  • Updated energy intensity and emissions for freight and intercity passenger rail transportation.
  • Developed in GREET.net emissions within various regional aggregations of the United States, including regionalization at the state, eGrid subregion, NERC levels.

Minor update: R&D GREET 2015 March 28th 2016

R&D GREET® .Net 2015 DOI: 10.11578/GREET-Net-2015/dc.20200803.11

I. Software v1.3.0.12704

  • Minor Display Bug Fixes
  • LHV support per mass basis for vehicle fuels
  • Stochastic plugin: Sampling fix
  • Stochastic plugin: Export to Excel
  • Stochastic plugin: Monitor vehicle results

II. Database v12707

  • Minor Hydrogen Pathways Data Fixes
  • Passenger Busses Added
  • Heavy Duty Trucks Added
  • Rail transports Added
  • New Jet Fuels Added

Minor update: R&D GREET 2015 October 23th 2015

R&D GREET® .Net 2015 DOI: 10.11578/GREET-Net-2015/dc.20200803.11

I. Software v1.3.0.10631

  • Bug fixed: Mix are now saving their functional unit to the data file
  • Bug fix: Welcoming page updated
  • Bug fix: DLLs for API are now saved to MyDocuments/Greet/API/2015
  • Bug fix: Resolved crash if GREET started without internet connection
  • Bug fix: Example 1 & 2 for API updated using newer unit system
  • Enhancement: Calculations are changed to converge to the final values with less iterations
  • Enhancement: Updated data editor menus
  • Enhancement: Freeze first column of WTW results
  • Enhancement: Inputs allows dimensionless values (such as Item)
  • Enhancement: Transportation mode integrity checks updated

II. Data v11505

  • Added Rye Cover Crop and Animal Manure Land Managements to Corn Farming and Used for Integrated Corn/Stover Ethanol pathway
  • Implemented new process and pathway for renewable gasoline from pyrolysis forest residue
  • Added the vehicle "Car: SI ICEV - RG from Forest Residue" to use the forementioned fuel
  • Updated the urban shares for processes in pathways involved in Crude Average for use in US Refineries
  • Updated the NG Production from Landfill Gas (LFG) pathway which is used as an intermediate fuel for 10+ dependent processes and pathways
  • Updated the LFG to CNG (both On-Site and Off-Site) Refueling pathways
  • Updated the NNA NG/FG to LNG as an intermediate fuel (processes and pathway as well)
  • Updated the transportation loss urban share for Gasoline Blendstock

Major update: R&D GREET 2015 October 2nd 2015

R&D GREET® .Net 2015 DOI: 10.11578/GREET-Net-2015/dc.20200803.11

In this version, the following major additions and updates were incorporated.

I. Major Data Expansions and Updates

  • Water consumption of fuel production pathways: developed and updated water consumption for hydrogen from various sources, petroleum fuels, biofuels, and hydro-electric power
  • Shale oil: developed energy and GHG emissions intensities of U.S. shale oil production with operation data from Bakken and Eagle Ford plays
  • Oil sands: updated GHG emission intensities for Canadian oil sands pathways for surface mining and in-situ technologies
  • High-octane fuels: developed high-octane fuel (HOF, with research octane number of 100) pathways with E10, E25, and E40 ethanol blends
  • Bioethanol: introduced land-management practices of cover crops and manure applications for corn-soy systems for soil organic carbon simulations
  • Waste to energy: expanded and updated waste-to-energy pathways to include renewable natural gas and hydrothermal liquefaction fuels from wastewater treatment plant biosolids and municipal solid waste
  • Aluminum for vehicle production: updated the life-cycle inventory for aluminum
  • Other metals for vehicle production and catalyst production (the latter is for fuel conversion processes): added or updated several metals, including molybdenum, platinum, zinc, nickel and silicon, glass and glass fiber, and Chilean copper

II. Other Data Updates

  • Natural gas: updated methane leakage emissions for natural gas pathways
  • Electricity generation mix: updated electricity generation mix based on EIA AEO 2015
  • Boiler emission factors: updated stationary combustion emission factors for coal and biomass boilers for industrial applications
  • Bioproducts: updated and expanded the bioproduct module of GREET to include L-lactic acid and ethyl lactate
  • Catalyst for thermochemical biofuels production: developed the energy and material flows for the production of gamma aluminum-based catalysts, including spent catalyst treatment and recovery
  • Soybeans based fuels: updated N2O emissions in soybean fields
  • Vehicle fuel economy and emissions: updated fuel economies and emission factors for both light-duty vehicles (LDVs) and heavy duty vehicles (HDVs)
  • Li-ion batteries: expanded and updated material data for Li-ion battery anodes, including graphite and metallic lithium
  • Lightweight pickup trucks: updated the material composition of baseline and lightweight pickup trucks
  • Vehicle powertrain material composition: updated the powertrain material composition of several different types of passenger vehicle technologies, including plug-in and fuel cell vehicles, as well as those of spark ignition and compression ignition engine vehicles

III. Software Expansions and Updates

  • Newly designed vehicle editor
  • Updated unit system handling
  • Allows any type of units for inputs and outputs of unit process models (acres, dollar...)
  • Redesigned loss editor
  • WTP allows the user to visualize quantities displaced and allocated
  • API and plugins updated
  • All parameters are now allowing time series

Major update: R&D GREET 2014

R&D GREET® .Net 2014 DOI: 10.11578/GREET-Net-2014/dc.20200803.12

In this version, the following major additions and updates were incorporated
  • Updated pathway structure to allow more complex and detailed pathways
  • Updated processes to allow multiple input and multiple outputs, each allocated output can be used downstream
  • Updated vehicle results to allow multiple functional units
  • Incorporated charting tool
  • Incorporated CCLUB with two new feedstocks (poplar and willow), new organic carbon emission factors for soil depth of 100 cm, and new land-use change results
  • Incorporated marine vessel module
  • Added water consumptions for the major pathways as an additional life-cycle analysis metric
  • Added black carbon and organic carbon emissions as an additional criteria air pollutants (CAP) and GHG species
  • Updated refining efficiency and greenhouse gas (GHG) emission intensity of petroleum products
  • Expanded oil sands modeling with more detailed and refined operation data
  • Updated methane emission for natural gas pathways as well as petroleum venting, fugitive and flaring emissions
  • Updated soybean and biodiesel production assumptions
  • Added pretreatment pathways including dilute acid pretreatment and ammonia fiber expansion
  • Added conventional and bio-product pathways
  • Added catalyst production pathways
  • Updated enzyme and yeast assumptions
  • Updated global warming potential (GWP)
  • Other updates are in progress and notification will be provided when these updates become available.

Major update: R&D GREET 2013

R&D GREET® .Net 2013 DOI: 10.11578/GREET-Net-2013/dc.20200803.13

In this version, the following major additions and updates were incorporated
  • Updated parameters according to 2013 studies
  • Bio-fuels from algae pathways
  • Jet-fuels from conventional and renewable feedstocks
  • Aviation module for Well to Wake studies
  • Renewable natural gas landfill gas
  • Database merging module
  • Stochastic module and uncertainty definitions for key parameters
  • GREET Application Program Interface (API) for developers.

First release: R&D GREET Beta 1.0

This was the first release of the new .net platform. It was released as a "Beta" version to indicate our users that this was still in development and subject to many modifications. After the success of this revision we made major changes over the year and released the 2013 revision.