Energy Fuels 2010, 24, 4226–4230 Published on Web 07/22/2010
: DOI:10.1021/ef100620u
Regenerable Multifunctional Sorbent Development for Sulfur and Chloride Removal from Coal-Derived Synthesis Gas Ranjani Siriwardane,*,† James C. Fisher II,‡ and Thomas Simonyi‡ †
National Energy Technology Laboratory, United States Department of Energy, 3610 Collins Ferry Road, Post Office Box 880, Morgantown, West Virginia 26507-0880, and ‡URS Washington Division, 3610 Collins Ferry Road, Post Office Box 880, Morgantown, West Virginia 26507 Received May 17, 2010. Revised Manuscript Received July 6, 2010
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 (H2S) 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 H2S and HCl sorption will be discussed in this paper.
Hydrogen sulfide is the major impurity in coal-gasification gas streams, and zinc oxide (ZnO)-based sorbents have been developed to remove H2S to the
