BioFuels

Biomass Farming

The bio-masses used for the bio-fuels pathways are:

• Soybean
• Palm FFb
• Rapeseed
• Jatropha
• Camelina

All those farming processes are implemented in GREET. They are using regular US averages fertilizer production and Diesel for non road engine to power the farming tractors and other stationary engines used (pumps, conveyors...)

The products are assumed to be transported dried so there is no need to specify the moisture content of those materials in the transportation processes after those farming processes.

Bio-fuels production

General Biofuel Production File:Biofuels.dia

Bio-fuels production generates a lot of valuable co-products such as SBM or Glycerine. In the Excel spreadsheet options are offered on the main page to switch between system level allocation or process level allocation/displacement. In GREET we choose to treat that as two different sets of processes/pathways.

For the process level allocation/displacement method we create two distinct processes Oil Extraction and Transesterification. Each of them have their set of inputs and a definition of the co-products. It is therefore allowed to perform an displacement on the first process and a market allocation on the transeterification process, the treatement method choosen for each process is independant.

If the model chosen is a system level allocations the extraction and transesterification processes are modeled as a single entity with two distinct co-products.