Sorbents for High-Temperature Mercury Removal from Coal-Derived Syngas

Period of Performance: 01/01/2003 - 12/31/2003

Unknown

Phase 1 SBIR

Recipient Firm

TDA Research, Inc.
12345 W. 52nd Ave. Array
Wheat Ridge, CO 80033

Abstract

70592 Gasification technologies convert coal into synthesis gas feed streams that can be used in power cycles for the high-efficiency generation of electricity. However, the coal-derived synthesis gas contains a myriad of trace contaminants, including mercury, which is designated as a hazardous pollutant that cannot be released to the atmosphere. The cost-effective removal of these contaminants is critical for the successful utilization of coal as a feedstock in advanced power cycles. This project will develop a sorbent-based system that can reduce the concentration of a major coal pollutant, mercury, to less than parts-per-billion levels in the coal-derived synthesis gas. Phase I developed a low cost, high capacity sorbent that can remove mercury from elevated temperature, coal-derived synthesis gas. Also, the technical and economic feasibility of a process using this sorbent, which dramatically reduces the cost of mercury removal, was demonstrated. Phase II will design and fabricate a prototype test unit to demonstrate the concept at a larger scale. As a part of these experiments, the effectiveness of the sorbent in the presence of other trace impurities (e.g., H2S, COS, AsH3), which contaminate coal-derived syngas, will be demonstrated. Commercial Applications and Other Benefits as described by awardee: The sorbent-based system should provide cost effective contaminant removal, enabling rapid and widespread implementation of gasification-based advanced power systems.