Regenerable Multifunctional Sorbent Development for Sulfur and Chloride Removal from Coal-Derived Synthesis Gas

摘要

A large number of components in coal form corrosive and toxic compounds during coal gasification processes. These contaminants have to be reduced to the parts-per-million range to use the fuel gas in an integrated gasification combined cycle. Even more stringent requirements are expected if the fuel gas is to be used in fuel cell or chemical production applications. Impurity removal may be even more cost-effective if multiple impurities can be removed in a minimum number of steps. To accomplish this goal, a regenerable sorbent capable of removing both hydrogen chloride (HCl) and hydrogen sulfide (H_2S) was investigated. The results of the thermogravimetric analyzer tests and bench-scale fixed-bed flow reactor tests conducted with the sorbent to evaluate the feasibility of both H_2S and HC1 sorption will be discussed in this paper.