P-09　Effect addition of various biomass char on steam co-gasification with rice straw

Abstract

Biomass char obtained from pyrolysis process has high activity due to high carbon content and low volatiles amount compared to the original biomass. In some researches, biomass char is also used as catalyst support or catalyst for the reforming of tar. In this study, various biomass chars were combined with rice straw to enhance gas production in the rice straw gasification. Apple tree branch, knotweed stem, and seaweed were chosen as biomass char sources because they have high contents of Ca and K in their ashes that have activity to increase gas production of gasification. Pyrolysis to generate the char was performed at 500°C with a heating rate 10°C/min for 2h. The steam co-gasification was performed in a fixed bed reactor at 750°C for 1.5h with a ratio of biomass/ char of 1:1 in 0.5g of total mass. From those 3 biomass chars tested, seaweed char was the only char that can increase gas production when combining with rice straw, even though Ca and K contents in seaweed ash is not as high as apple tree branch and knotweed stem.