Effect of air-steam agent on co-gasification of biomass and coal

Abstract

The goal of the study is to investigate the impact of adding steam as a gasification agent for the co-gasification of biomass and coal. Study has been performed with ASPEN PLUS simulation, and has been confirmed by experimental findings. The coal and biomass ratio of 60% was gasified at an equivalent ratio of 0.29 and 0.35. The addition of steam was as much as 0%, 25%, 50%, 75%, and 100% for each equivalence ratio difference. The findings demonstrate that the best quality of fuel gasses such as CO and It is obtained by applying up to 75% steam where the temperature of the reactor can still be held at 770°C. The cold gas efficiency and carbon combustion efficiency where equivalent ratio ranged from 0.29 to 0.35 at 75% steam to air ratio are 61.2-67.3% and 77-79%, respectively. Co-gasification between coal and biomass with a combination of air and steam may technically be a replacement for biomass gasification with air.