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Syngas Production by Combined Biomass Gasification and in Situ Biogas Reforming

Author:
Åberg, Katarina, Pommer, Linda, Nordin, Anders
Source:
Energy & Fuels 2015 v.29 no.6 pp. 3725-3731
ISSN:
1520-5029
Subject:
biogas, biomass, biorefining, chemical equilibrium, cost effectiveness, feedstocks, fluidized beds, gasification, methane, oxygen, steam, synthesis gas, temperature, wood
Abstract:
For small- to medium-sized streams of biogas (methane) produced at a biorefinery site where cost-efficient reforming by traditional methods are unavailable, combined biomass gasification and methane reforming could facilitate co-conversion and increase the H₂/CO ratio in the syngas from the gasification plant. In the present work, co-gasification of biomass with CH₄ was evaluated by means of a parametric chemical equilibrium study for both wood/CH₄ and black liquor/CH₄ feedstocks and bench-scale fluidized-bed gasification experiments for a wood/peat/CH₄ fuel mixture. The parametric study indicated that high-temperature, and steam and oxygen addition all facilitate a high conversion rate, i.e., methane reforming. Evaluating the influence of the gasification temperature on CH₄ reforming and increasing the H₂/CO ratio experimentally demonstrated that high temperatures are required for efficient co-conversion.
Agid:
5342594