Experimental Studies on H<sub>2</sub>-Rich Gas Production by Co-Gasification of Coal and Biomass in an Intermittent Fluidized Bed Reactor

Abstract

This paper illustrates the experimental results of co-gasification of biomass and coal in an intermittent fluidized bed reactor, aiming to investigate the effects of gasification temperature (T) and steam to biomass mass ratio (SBMR) on the composition, yield, low heating value (LHV) and carbon conversion efficiency of the product gas. The results show that H2-rich gas with a high LHV is generated, in the range of 12.22-18.67 MJ/Nm3, and the H2 content in the product gas is in the range of 28.7-51.4%. Increases in temperature lead to an increase in CO and H2 content. The H2/CO molar ratio in the product gas is close to 1 at temperature above 925 °C. With steam addition, the H2 content increases gradually, while the content of CO increases first and then decrease correspondingly. The molar ratio of H2/CO is close to 1 with the smallest supplied amount of steam addition (SBMR =0.4).