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Reduction of spalling in mixed metal oxide desulfurization sorbents by addition of a large promoter metal oxide

United States Patent

5,693,588
December 2, 1997
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
Mixed metal oxide pellets for removing hydrogen sulfide from fuel gas mixes derived from coal are stabilized for operation over repeated cycles of desulfurization and regeneration reactions by addition of a large promoter metal oxide such as lanthanum trioxide. The pellets, which may be principally made up of a mixed metal oxide such as zinc titanate, exhibit physical stability and lack of spalling or decrepitation over repeated cycles without loss of reactivity. The lanthanum oxide is mixed with pellet-forming components in an amount of 1 to 10 weight percent.
Poston; James A. (Star City, WV)
The United States of America as represented by the Department of Energy (Washington, DC)
08/ 689,634
August 16, 1996
ORIGIN OF THE INVENTION The United States Government has rights in the invention pursuant to the employer-employee relationship of the United States Department of Energy and the inventor.