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Indexed by:期刊论文

Date of Publication:2016-11-01

Journal:FUEL

Included Journals:Scopus、SCIE、EI

Volume:183

Page Number:132-138

ISSN No.:0016-2361

Key Words:Co-gasification; Fixed-bed; Coal; Biomass; Synergy

Abstract:This study inspects the occurrence of synergy in the co-gasification of coal and biomass in a fixed bed reactor. Two separate and a pre-mixed bed configurations with a congruent sample mass are designed for comparative study. The intimate contact between bio-ash and coal char grains is a prerequisite for the occurrence of the synergy effect in the co-gasification of coal and biomass. The separate bed configurations generally form either a coal-char/bio-ash or a bio-ash/coal-ash interface, whereas the pre-mixed bed configuration produces well-dispersed bio-ashes that come into close contact with coal char grains. As a result, a stronger synergy effect occurs in the mixed bed configuration rather than in the separate configuration. A novel method is explored to collect and determine the heavy tar and water yields generated during the initial pyrolysis step. Results show that bio-char bed has better tar cracking performance than coal char bed. (C) 2016 Elsevier Ltd. All rights reserved.