Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2016-11-01

Journal: FUEL

Included Journals: EI、SCIE、Scopus

Volume: 183

Page Number: 132-138

ISSN: 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.