A core-in-shell sorbent is described herein. The core is reactive to the compounds of interest, and is preferably calcium-based, such as limestone for hot gas desulfurization. The shell is a porous protective layer, preferably inert, which allows the reactive core to remove the desired compounds while maintaining the desired physical characteristics to withstand the conditions of use.
US 6,689,714 B2
Iowa State University Research Foundation, Inc.
Wheelock, Thomas D. and Akiti, Tetteh T. Jr., "Core-in-shell sorbent for hot coal gas desulfurization" (2004). Iowa State University Patents. 312.