Experimental study of an extruder‐feeder for biomass direct liquefaction

D. H. White, N. R. Schott, D. Wolf

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A new type of feeding system by an extruder‐feeder was utilized to pump high concentrations of slurries into an advanced biomass liquefaction reactor operating at pressures of up to 25 MPa and temperatures of up to 400°C. The operability of such an extruder‐feeder and the design criteria for this type of unit operation are described, and operational data are reported. Three types of extruder‐feeders were used, and many different types of feedstocks were tested. The extruder‐feeder proved to be effective in the biomass direct liquefaction process and could prove applicable in many other processes where high concentrations of solids are to be pumped, thus reducing drastically the size of the plant and the need for recycle of large amounts of liquid carriers for the solids. Typical experimental data and results of the flow rates and pressure generation for the various extruder‐feeders and their operational conditions for several feedstocks are reported. The theoretical models developed for plasticating extruders were found to be acceptable also for the extruder‐feeder of biomass feedstock, applying appropriate drag and pressure flow coefficients.

Original languageEnglish
Pages (from-to)969-977
Number of pages9
JournalCanadian Journal of Chemical Engineering
Volume67
Issue number6
DOIs
StatePublished - 1 Jan 1989
Externally publishedYes

Keywords

  • biomass liquefaction
  • extruder‐feeders
  • slurry pumping
  • solids pumping

ASJC Scopus subject areas

  • General Chemical Engineering

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