Method of removing hydrogen sulfide from gases utilizing a zinc oxide sorbent and regenerating the sorbent

Patent · Tue Apr 10 04:00:00 EST 1984

OSTI ID:6383665

Jalan, V M; Frost, D G

A spent solid sorbent resulting from the removal of hydrogen sulfide from a fuel gas flow is regenerated with a steam-air mixture. The mixture of steam and air may also include additional nitrogen or carbon dioxide. The gas mixture contacts the spent sorbent containing metal sulfide at a temperature above 500/sup 0/ C. to regenerate the sulfide to metal oxide or carbonate. Various metal species including the period four transition metals and the lanthanides are suitable sorbents that may be regenerated by this method. In addition, the introduction of carbon dioxide gas permits carbonates such as those of strontium, barium and calcium to be regenerated. The steam permits regeneration of spent sorbent without formation of metal sulfate. Moreover, the regeneration will proceed with low oxygen concentrations and will occur without the increase in temperature to minimize the risk of sintering and densification of the sorbent.

• Assignee: Dept. of Energy
• Patent Number(s): US 4442078
• OSTI ID: 6383665
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
ADSORPTION
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
LOW BTU GAS
NATURAL GAS
OXIDES
OXYGEN COMPOUNDS
PRODUCER GAS
REGENERATION
SORPTION
SORPTIVE PROPERTIES
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
ZINC COMPOUNDS
ZINC OXIDES