Effect of Coexistent Gases on Desulfurization using Activated Coke in Biomass Gasification Process

摘要

Simultaneous adsorption of H_2S and/or COS by activated coke in the presence of other gases and the effect of coexisting gases on the adsorption behavior of sulfur compounds were evaluated. The coexisting gases (H_2, H_2O, CO, and CO_2) were supplied separately from H_2S or COS. The activated coke produced from coal was used as the adsorber in this experiment. While H_2S was able to adsorb onto the activated coke on its own, its ability to adsorb decreased significantly in the presence of other gases due to the generation of COS. On the other hand, the adsorption ability of COS improved significantly when H_2, H_2O, CO and CO_2 were present. This was attributed to the conversion of COS into H_2S and the adsorption of COS as H_2S in the activated coke.