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Indexed by:期刊论文

Date of Publication:2017-06-08

Journal:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

Included Journals:SCIE、EI、Scopus

Volume:42

Issue:23

Page Number:15471-15478

ISSN No.:0360-3199

Key Words:Biomass gasification; Desulfurization; Tar reforming; Nickel catalyst

Abstract:For the production of bio-SNG (substitute natural gas) from syngas of biomass steam gasification, trace amounts of sulfur and tar compounds in raw syngas must be removed. In present work, biomass gasification and in-bed raw gas upgrading have been performed in a decoupled dual loop gasifier (DDLG), with aggregation-resistant nickel supported on calcined olivine (Ni/olivine) as the upgrading catalyst for simultaneous desulfurization and tar elimination of biogenous syngas. The effects of catalyst preparation, upgrading temperature and steam content of raw syngas on sulfur removal were investigated and the catalytic tar reforming at different temperatures was evaluated as well. It was found that 850 degrees C calcined Ni/olivine was efficient for both inorganic-sulfur (H2S) and organic-sulfur (thiophene) removal at 600-680 degrees C and the excellent desulfurization performance was maintained with wide range H2O content (27.0-40.7%). Meanwhile, tar was mostly eliminated and H2 content increased much in the same temperature range. The favorable results indicate that biomass gasification in DDLG with Ni/olivine as the upgrading bed material could be a promising approach to produce qualified biogenous syngas for bio-SNG production and other syngas-derived applications in electric power, heat or fuels. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.