Development of an extruder-feeder biomass direct liquefaction process

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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 ... continued below

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Pages: (244 p)

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White, D.H. & Wolf, D. (Arizona Univ., Tucson, AZ (United States). Dept. of Chemical Engineering) October 1, 1991.

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Description

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 3000 psi. The extruder-feeder has been integrated with a unique reactor by the University 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 high pressure reactor in the biomass liquefaction process. An experimental facility was constructed and following shakedown operations, wood crude oil was produced by mid-1985. By 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 3000 psi and temperatures from 350{degree}C to 430{degree}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. 38 refs., 82 figs., 26 tabs.

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Pages: (244 p)

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  • Other: DE92003844
  • Report No.: PNL-7830-Vol.2
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/6020898 | External Link
  • Office of Scientific & Technical Information Report Number: 6020898
  • Archival Resource Key: ark:/67531/metadc1101076

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  • October 1, 1991

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  • Feb. 18, 2018, 3:59 p.m.

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  • March 2, 2018, 5:19 p.m.

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White, D.H. & Wolf, D. (Arizona Univ., Tucson, AZ (United States). Dept. of Chemical Engineering). Development of an extruder-feeder biomass direct liquefaction process, report, October 1, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc1101076/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.