Conversion of wood residues to diesel fuel
The basic approach is indirect liquefaction, i.e., thermal gasification followed by catalytic liquefaction. The indirect approach results in separation of the oxygen in the biomass feedstock, i.e., oxygenated compounds do not appear in the liquid hydrocarbon fuel product. The general conversion scheme is shown. The process is capable of accepting a wide variety of feedstocks. Potential products include medium quality gas, normal propanol, paraffinic fuel and/or high octane gasoline. A flow diagram of the continuous laboratory unit is shown. A fluidized bed pyrolysis system is used for gasification. Capacity is about 10 lbs/h of feedstock. The pyrolyzer can be fluidized with recycle pyrolysis gas, steam or recycle liquefaction system off gas or some combination thereof. Tars are removed in a wet scrubber. Unseparated pyrolysis gases are utilized as feed to a modified Fischer-Tropsch reactor. The liquid condensate from the reactor consists of a normal propanol-water phase and a paraffinic hydrocarbon phase. The reactor can be operated to optimize for either product. If a high octane gasoline is desired, the paraffinic fuel is passed through a conventional catalytic reformer. The normal propanol could be used as a fuel extender if blended with the hydrocarbon fuel products. Off gases from the downstream reactors are of high quality due to the accumulation of low molecular weight paraffins.
- Research Organization:
- Arizona State Univ., Tempe (USA). Coll. of Engineering and Applied Sciences
- DOE Contract Number:
- AS02-76CS40202
- OSTI ID:
- 6826667
- Report Number(s):
- COO-2982-67; CONF-810237-1
- Country of Publication:
- United States
- Language:
- English
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ALCOHOLS
ALKANES
BIOMASS
BOILING POINTS
CALORIFIC VALUE
CATALYTIC REFORMING
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMICAL REACTORS
COMBUSTION PROPERTIES
DATA
DECOMPOSITION
DENSITY
ENERGY SOURCES
EXPERIMENTAL DATA
FISCHER-TROPSCH SYNTHESIS
FLUIDIZED BED
FLUIDS
FUEL OILS
FUELS
GASES
GASIFICATION
GASOLINE
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
LIQUEFACTION
LIQUID FUELS
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PROPANOLS
PYROLYSIS
PYROLYSIS PRODUCTS
PYROLYTIC GASES
REFORMER PROCESSES
RENEWABLE ENERGY SOURCES
SOLID WASTES
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
WASTES
WOOD WASTES
YIELDS