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Title: Durable zinc oxide-containing sorbents for coal gas desulfurization

Durable zinc-oxide containing sorbent pellets for removing hydrogen sulfide from a gas stream at an elevated temperature are made up to contain titania as a diluent, high-surface-area silica gel, and a binder. These materials are mixed, moistened, and formed into pellets, which are then dried and calcined. The resulting pellets undergo repeated cycles of sulfidation and regeneration without loss of reactivity and without mechanical degradation. Regeneration of the pellets is carried out by contacting the bed with an oxidizing gas mixture.
Inventors:
 [1]
  1. (Morgantown, WV)
Issue Date:
OSTI Identifier:
870318
Assignee:
United States of America as represented by United States (Washington, DC) NETL
Patent Number(s):
US 5494880
Research Org:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
Country of Publication:
United States
Language:
English
Subject:
durable; zinc; oxide-containing; sorbents; coal; gas; desulfurization; zinc-oxide; containing; sorbent; pellets; removing; hydrogen; sulfide; stream; elevated; temperature; contain; titania; diluent; high-surface-area; silica; binder; materials; mixed; moistened; formed; dried; calcined; resulting; undergo; repeated; cycles; sulfidation; regeneration; loss; reactivity; mechanical; degradation; carried; contacting; bed; oxidizing; mixture; repeated cycles; oxide containing; sorbent pellets; gas desulfurization; oxidizing gas; zinc oxide; gas stream; elevated temperature; hydrogen sulfide; gas mixture; removing hydrogen; coal gas; durable zinc; containing sorbent; /502/