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

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.
  1. (Star City, WV)
Issue Date:
OSTI Identifier:
United States of America as represented by Department of Energy (Washington, DC) NETL
Patent Number(s):
US 5693588
Research Org:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
Country of Publication:
United States
reduction; spalling; mixed; metal; oxide; desulfurization; sorbents; addition; promoter; pellets; removing; hydrogen; sulfide; fuel; gas; mixes; derived; coal; stabilized; operation; repeated; cycles; regeneration; reactions; lanthanum; trioxide; principally; zinc; titanate; exhibit; physical; stability; lack; decrepitation; loss; reactivity; pellet-forming; components; amount; 10; weight; percent; repeated cycles; zinc titanate; mixed metal; fuel gas; weight percent; metal oxide; hydrogen sulfide; removing hydrogen; promoter metal; regeneration reaction; lanthanum oxide; generation reaction; gas mixes; desulfurization sorbents; /502/423/