Research on the pyrolysis of hardwood in an entrained bed process development unit

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Description

An atmospheric flash pyrolysis process, the Georgia Tech Entrained Flow Pyrolysis Process, for the production of liquid biofuels from oak hardwood is described. The development of the process began with bench-scale studies and a conceptual design in the 1978--1981 timeframe. Its development and successful demonstration through research on the pyrolysis of hardwood in an entrained bed process development unit (PDU), in the period of 1982--1989, is presented. Oil yields (dry basis) up to 60% were achieved in the 1.5 ton-per-day PDU, far exceeding the initial target/forecast of 40% oil yields. Experimental data, based on over forty runs under steady-state conditions, ... continued below

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Pages: (316 p)

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Kovac, R.J.; Gorton, C.W.; Knight, J.A.; Newman, C.J. & O'Neil, D.J. (Georgia Inst. of Tech., Atlanta, GA (United States). Research Inst.) August 1, 1991.

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Description

An atmospheric flash pyrolysis process, the Georgia Tech Entrained Flow Pyrolysis Process, for the production of liquid biofuels from oak hardwood is described. The development of the process began with bench-scale studies and a conceptual design in the 1978--1981 timeframe. Its development and successful demonstration through research on the pyrolysis of hardwood in an entrained bed process development unit (PDU), in the period of 1982--1989, is presented. Oil yields (dry basis) up to 60% were achieved in the 1.5 ton-per-day PDU, far exceeding the initial target/forecast of 40% oil yields. Experimental data, based on over forty runs under steady-state conditions, supported by material and energy balances of near-100% closures, have been used to establish a process model which indicates that oil yields well in excess of 60% (dry basis) can be achieved in a commercial reactor. Experimental results demonstrate a gross product thermal efficiency of 94% and a net product thermal efficiency of 72% or more; the highest values yet achieved with a large-scale biomass liquefaction process. A conceptual manufacturing process and an economic analysis for liquid biofuel production at 60% oil yield from a 200-TPD commercial plant is reported. The plant appears to be profitable at contemporary fuel costs of $21/barrel oil-equivalent. Total capital investment is estimated at under $2.5 million. A rate-of-return on investment of 39.4% and a pay-out period of 2.1 years has been estimated. The manufacturing cost of the combustible pyrolysis oil is $2.70 per gigajoule. 20 figs., 87 tabs.

Physical Description

Pages: (316 p)

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OSTI; NTIS; GPO Dep.

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  • Other: DE92001851
  • Report No.: PNL-7788
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/5086913 | External Link
  • Office of Scientific & Technical Information Report Number: 5086913
  • Archival Resource Key: ark:/67531/metadc1061529

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 1, 1991

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Jan. 29, 2018, 12:15 p.m.

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Kovac, R.J.; Gorton, C.W.; Knight, J.A.; Newman, C.J. & O'Neil, D.J. (Georgia Inst. of Tech., Atlanta, GA (United States). Research Inst.). Research on the pyrolysis of hardwood in an entrained bed process development unit, report, August 1, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc1061529/: accessed April 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.