Appendix A – Table of Feedstocks* Used to Make 
Fuels that May Be Eligible for the § 45Z Credit
Feedstock Type	Feedstock	Additional Information 	
Agricultural Residue	Barley straw		
Agricultural Residue	Corn stover  		
Agricultural Residue	Cotton field residues 		
Agricultural Residue	Oats straw 		
Agricultural Residue	Orchard or vineyard residues 		
Agricultural Residue	Rice straw		
Agricultural Residue	Sorghum stubble 		
Agricultural Residue	Sugarcane bagasse 		
Agricultural Residue	Wheat straw		
Agricultural Residue	Other agricultural residues 		
* 	Appendix A identifies primary feedstocks used to make transportation fuels that may be eligible for the § 45Z credit for purposes of applications for registration.  Producers should list the feedstock(s) that are sourced from one or more separate entities or facilities as the main input(s) to their fuel production process.  For example, an alcohol-to-jet (ATJ) producer that imports ethanol from one or more separate ethanol production facilities may list ethanol as the feedstock, whereas an integrated ATJ facility with on-site ethanol production should list the feedstock used to produce the ethanol.  Renewable natural gas (RNG) producers with on-site anaerobic digestion should list the inputs to the digester (for example, manure or food waste) as feedstocks, whereas RNG producers that import biogas from a separate site should list biogas as the feedstock. 
** For purposes of Appendix A, “dedicated” means woody biomass grown for the purpose of being harvested for biofuel production. 

Feedstock Type	Feedstock	Additional Information	
Algae	Algal oil		
Biogas	Dairy/swine digester gas		
Biogas	High solid anaerobic digester gas		
Biogas	Landfill gas 		
Biogas	Waste gases		
Biogas	Other biomethane 		
Biomass Energy Crop	Biomass sorghum 		
Biomass Energy Crop	Energy cane		
Biomass Energy Crop	Miscanthus		
Biomass Energy Crop	Switchgrass		
Biomass Energy Crop	Other biomass energy crop 		
CO2	CO2 co-produced with hydrogen 	Includes CO2 co-produced with hydrogen produced for use in the Haber-Bosch process 	
CO2	CO2 from biogas upgrading 	Includes CO2 from landfill gas upgrading	
CO2	CO2 from calcination of inorganic materials in cement production 		
CO2	CO2 from direct air capture  		
CO2	CO2  fromethanol fermentation		
CO2	CO2 from ore oxidation in iron and steel production		
CO2	Post-combustion captured biogenic CO2 	Includes only CO2 captured from combustion of bio-based materials (for example, biomass, biogas) 	
CO2	Post-combustion captured fossil CO2 	Includes only CO2 captured from combustion of fossil fuels 	
CO2	Other CO2 source 		
Ethanol 	Corn grain	Applicable for SAF only 	
Ethanol 	Sugarcane 	Applicable for SAF only 	

Feedstock Type	Feedstock	Additional Information	
Ethanol 	Other sugar crop	Applicable for SAF only 	
Ethanol 	Other grain crop	Applicable for SAF only 	
Ethanol 	Other feedstocks 	Applicable for SAF only 	
Fats, Oils, and Greases 	Tallow 		
Fats, Oils, and Greases	Tall oil		
Fats, Oils, and Greases	Used cooking oil		
Fats, Oils, and Greases 	Tallow 		
Industrial Byproduct	Black liquor		
Industrial Byproduct	Corn kernel fiber 		
Industrial Byproduct	Distillers corn oil		
Industrial Byproduct	Distillers sorghum oil		
Industrial Byproduct	Milling residues		
Industrial Byproduct	Nut hulls or shells		
Industrial Byproduct	Other byproduct 		
Industrial Byproduct	Other food or beverage manufacturing wastes 	This includes brewery, winery, and distillery waste, including spent grain 	
Isobutanol	Corn grain	Applicable for SAF only 	
Isobutanol	Sugarcane 	Applicable for SAF only 	
Isobutanol	Other feedstocks 	Applicable for SAF only 	
Isobutanol	Other grain crop	Applicable for SAF only 	
Isobutanol	Other sugar crop	Applicable for SAF only 	
Manure 	Manure, beef 		
Manure 	Manure, dairy 		
Manure 	Manure, swine 		
Mixed Organic Waste 	Construction, demolition, or other urban wood waste 		
Mixed Organic Waste 	Mixed non-residential food waste 		
Mixed Organic Waste 	Mixed residential food waste 		
Mixed Organic Waste 	Municipal solid waste		
Mixed Organic Waste 	Paper and paperboard 		
 
Mixed Organic Waste 	Wastewater treatment 
Sludge 		

Feedstock Type	Feedstock	Additional Information	
Mixed Organic Waste 	Yard waste 		
Mixed Organic Waste 	Other mixed organic waste		
Natural Gas	Natural gas		
Natural Gas	Renewable natural gas		
Oilseed 	Jatropha oil		
Oilseed 	Palm oil	Potentially eligible feedstock for non-SAF transportation fuel. SAF derived from palm fatty acid distillates is explicitly prohibited 	
Oilseed 	Rapeseed/canola oil 		
Oilseed	Soybean oil		
Oilseed 	Other oilseed		
Other Alcohols 	Corn grain 	Applicable for SAF only 	
Other Alcohols 	Sugarcane 	Applicable for SAF only 	
Other Alcohols 	Other feedstocks 	Applicable for SAF only 	
Other Alcohols 	Other grain crop	Applicable for SAF only 	
Other Alcohols 	Other sugar crop	Applicable for SAF only 	
Second or Intermediate Crop	Camelina		
Second or Intermediate Crop	Carinata		
Second or Intermediate Crop	Corn safrina 		
Second or Intermediate Crop	Other second or intermediate crop 		
Second or Intermediate Crop	Pennycress 		
Starch Crop	Barley		
Starch Crop	Corn grain		
Starch Crop	Grain sorghum		
Starch Crop	Wheat 		
Starch Crop	Other starch crop		
Sugar Crop 	Sugarbeet 		
Sugar Crop 	Sugarcane 		
Sugar Crop 	Sweet sorghum 		
Sugar Crop 	Other sugar crop		
Woody Biomass	Forest slash 		
Woody Biomass	Pre-commercial thinnings 
 		
Feedstock Type	Feedstock	Additional Information	
Woody Biomass	Dedicated short-rotation poplar**		
Woody Biomass	Dedicated short-rotation willow** 		
Woody Biomass	Dedicated pine**		
Woody Biomass	Dedicated short-rotation eucalyptus** 		
Woody Biomass	Other dedicated woody 
Biomass**		
Woody Biomass	Other woody biomass residues 		
Other 	A feedstock used to produce a fuel eligible for the § 45Z credit which is not listed in this table 	On your Form 637, state “Other” and provide a description of the feedstock