Development of an extruder-feeder biomass direct liquefaction process
- Arizona Univ., Tucson, AZ (United States). Dept. of Chemical Engineering
As an abundant, renewable, domestic energy resource, biomass could help the United States reduce its dependence on imported oil. Biomass is the only renewable energy technology capable of addressing the national need for liquid transportation fuels. Thus, there is an incentive to develop economic conversion processes for converting biomass, including wood, into liquid fuels. Through research sponsored by the US DOE's Biomass Thermochemical Conversion Program, the University of Arizona has developed a unique biomass direct liquefaction system. The system features a modified single-screw extruder capable of pumping solid slurries containing as high as 60 wt % wood flour in wood oil derived vacuum bottoms at pressures up to 3,000 psi. By comparison, conventional pumping systems are capable of pumping slurries containing only 10--20 wt % wood flour in wood oil under similar conditions. The extruder-feeder has been integrated with a unique reactor to form a system which offers potential for improving high pressure biomass direct liquefaction technology. The extruder-feeder acts simultaneously as both a feed preheater and a pumping device for injecting wood slurries into a 3,000 psi pressure reactor in the biomass liquefaction process. An experimental facility was constructed during 1983--84. Following shakedown operations, wood crude oil was produced by mid-1985. During the period January 1985 through July 1988, a total of 57 experimental continuous biomass liquefaction runs were made using White Birch wood feedstock. Good operability was achieved at slurry feed rates up to 30 lb/hr, reactor pressures from 800 to 3,000 psi and temperatures from 350{degrees}C to 430{degrees}C under conditions covering a range of carbon monoxide feed rates and sodium carbonate catalyst addition. Crude wood oils containing as little as 6--10 wt % residual oxygen were produced. 43 refs., 81 figs., 52 tabs.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (United States); Arizona Univ., Tucson, AZ (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6020920
- Report Number(s):
- PNL-7830-Vol.1; ON: DE92003845
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
090900* -- Biomass Fuels-- Processing-- (1990-)
BIOMASS
BIOMASS CONVERSION PLANTS
CHEMICAL REACTORS
DESIGN
DISPERSIONS
DOCUMENT TYPES
ENERGY SOURCES
HIGH PRESSURE
HIGH TEMPERATURE
INDUSTRIAL PLANTS
LIQUEFACTION
MEDIUM PRESSURE
MIXTURES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROGRESS REPORT
RENEWABLE ENERGY SOURCES
RESEARCH PROGRAMS
SHEAR
SLURRIES
SUSPENSIONS
THERMOCHEMICAL PROCESSES
VISCOSITY
WOOD
WOOD OILS