Commercial demonstration The National Renewable Energy Laboratory (NREL) defines a commercial demonstration for biofuel refinery as a facility that has the capacity to process 700 dry tons of feedstock per day. In addition, a commercial demonstration facility will be a fully integrated facility that includes all processing steps at a scale sufficient to identify potential operational problems.
Corn stover Corn stalks, leaves, and cobs that remain after the corn-grain is harvested.
Demonstration facility NREL defines a demonstration facility for biofuel refinery as one that has the capacity to process 70 dry tons of feedstock per day. A true demonstration facility will be a fully integrated facility that includes all of the processing steps that a commercial-scale plant would have.
Drop-in fuel Nonpetroleum fuel that is compatible with existing infrastructure for petroleum-based fuels.
Feedstock Material that can be processed to make fuel, including grains, crop residues, forestry products, plant oils, animal fats, and municipal wastes.
Feedstuff Nutrient-rich material that can be incorporated into the diet of livestock or other animals.
Green diesel Hydrogenation product of triglycerides.
Hemicellulose A matrix of polysaccharides present in almost all plant cell walls with cellulose.
Hydrocarbon fuels Fuels that are organic compounds that contains primarily carbon and hydrogen and only trace amounts of other atoms such as sulfur, nitrogen, and oxygen. Hydrocarbon fuels include petroleum-based materials such as alkanes, olefins, and aromatics.
Hypoxia Low dissolved oxygen concentrations, generally less than 2 milligrams per liter.
Land cover Land cover is the extent and type of physical and biological cover over the surface of land.
Land use Land use is defined by anthropogenic activities, such as agriculture, forestry, and urban development, that alter land-surface processes including biogeochemistry, hydrology, and biodiversity.
Lignin A complex polymer that occurs in certain plant cell walls. Lignin binds to cellulose fibers and hardens and strengthens the cell walls of plants.
Lignocellulosic biomass Plant biomass composed of cellulose, hemicellulose, and lignin.
Pilot demonstration NREL defines a pilot demonstration for biofuel refinery as a facility that has the capacity to process 1-10 dry tons of feedstock per day. These facilities typically do not include fully integrated processes.
Reid Vapor Pressure A measure of fuel volatility.
Stumpage A fee charged by a landowner to companies or operators for the right to harvest timber on that land.


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