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- Title
A review of sorbents for high-temperature hydrogen sulfide removal from hot coal gas.
- Authors
Liu, Dongjing; Wang, Qian; Wu, Jiang; Liu, Yangxian
- Abstract
Abstract: Integrated gasification combined cycle (IGCC) and solid oxide fuel cell (SOFC) systems are considered as the most promising clean coal technologies. Syngas derived from coal gasification is the major fuel sources for IGCC and SOFC power systems; however, large amounts of sulfur compounds, mainly in the form of hydrogen sulfide, are produced during gasification. Hydrogen sulfide has to be removed prior to syngas utilization to protect downstream equipment from high-temperature corrosion. Therefore, hydrogen sulfide removal from raw syngas plays a key role in successful application of IGCC and SOFC systems. Hot coal gas desulfurization using solid sorbents is a more efficient technique for hydrogen sulfide removal, compared with conventional cold coal gas desulfurization with amine solution. This article reviews solid sorbents for high-temperature desulfurization, e.g., transition metal oxides, rare-earth oxides, spinel oxides, perovskite oxides, nanoelemental metals and mesoporous desulfurizers. Composite oxides that combine the properties of diverse metal oxides are promising candidates for hot coal gas desulfurization. The extensive background knowledge and the state of the art on high-temperature sorbents for hydrogen sulfide removal in this review provides inspiration and guidance to develop new cost-effective sorbents.Graphical Abstract:
- Subjects
HYDROGEN sulfide; COAL gas; CLEAN coal technologies; SOLID oxide fuel cells; TRANSITION metal oxides; COAL gasification
- Publication
Environmental Chemistry Letters, 2019, Vol 17, Issue 1, p259
- ISSN
1610-3653
- Publication type
Article
- DOI
10.1007/s10311-018-0792-x