Abstract
ABSTRACT The article presents simulation and analysis of sorbent-enhanced biomass gasification with biomass-specific pyrolysis correlations. An ASPEN plus model constituted of drying, pyrolysis, char transformation, and tar cracking is generated to analyze the effect of temperature, steam-to-biomass ratio (SBR), and equivalence ratio (ER) on syngas composition and process efficiency of sorbent enhanced steam-assisted air gasification of biomass. Yield of pyrolysis products is modeled by incorporating correlations as function of biomass composition and gasification temperature. The generated model is applied to analyze syngas composition, gas generation, and process efficiency associated with sorbent enhanced steam-assisted air gasification of three biomasses. At a temperature of 950 K, hydrogen concentration is found to be increased by 29.07%, 31.79%, and 28.31%, and carbon dioxide concentration is found to be decreased by 54.39%, 56.37%, and 54%, respectively, for sawdust, groundnut shell, and sugarcane bagasse with sorbent addition. Among the biomass considered, sugarcane bagasse is found to have the highest efficiency of 55.33%, followed by ground nut shell and sawdust with 52.01% and 48.78%, respectively.
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