Low sulfur content hot reducing gas production using calcium oxide desulfurization with water recycle

Patent · Tue Mar 23 04:00:00 EST 1982

OSTI ID:5467485

Feinman, J; Mcgreal, J E

A process and apparatus are claimed for producing a low sulfur content, hot reducing gas by desulfurizing hot reducing gas. This is done in the following manner; by contacting the sulfur-bearing hot reducing gas with a bed of a particulate calcium oxide desulfurizing agent to thereby produce a product gas stream and a byproduct calcium sulfide compositions recovering sulfur from the calcium sulfide composition by contacting the calcium sulfide composition with hot liquid water at a temperature and corresponding pressure sufficient to maintain steam in the system and to thereby convert the sulfide to calcium hydroxide and hydrogen sulfide and to produce a liquid water stream containing sulfur; combining the sulfur containing water stream with a fresh water stream and recycling this water stream for contacting the calcium sulfide composition. Preferably water vapor produced in the contacting step is condensed and returned to the system in the final stage of contacting the calcium sulfide composition with hot liquid water.

• Assignee: United States Steel Corp
• Patent Number(s): US 4321242
• OSTI ID: 5467485
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CALCIUM OXIDES
CALCIUM SULFIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
DOLOMITE
EFFICIENCY
ELEMENTS
FLUIDS
GASES
HOT GAS CLEANUP
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROXIDES
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MATERIALS
MINERALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
PRODUCTION
PURIFICATION
RECOVERY
RECYCLING
REDUCING AGENTS
SIZE
STEAM
SULFIDES
SULFUR
SULFUR COMPOUNDS
WATER