Affiliation:
1. Department of Chemical and Biological Engineering, Tufts University, Medford, MA 02155, USA.
Abstract
Sorbent materials that allow for high-temperature, regenerative desulfurization of fuel gas streams for the anode of a solid oxide fuel cell have been developed. Reversible adsorption of H
2
S on cerium and lanthanum oxide surfaces is demonstrated over many cycles at temperatures as high as 800°C, on both fresh or presulfided sorbents, and at very high space velocities. The adsorption and desorption processes are very fast, and removal of H
2
S to sub–parts per million levels is achieved at very short (millisecond) contact times. Any type of sulfur-free gas, including water vapor, can be used to regenerate the sorbent surface. Preferably, the anode off-gas stream is used to sweep the desorbed H
2
S to a burner.
Publisher
American Association for the Advancement of Science (AAAS)
Reference18 articles.
1. Cerium Oxide-Based Sorbents for Regenerative Hot Reformate Gas Desulfurization
2. Thermochemical Data of Pure Substances Part I/Part II 1993
3. Thermochemical Properties of Inorganic Substances 1973
4. Thermochemical Properties of Inorganic Substances: Supplement 1977
5. Sulfidation of zinc titanate and zinc oxide solids
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