Method of reducing sulfur dioxide content in flue gases

Patent · Tue Jun 22 04:00:00 EDT 1993

OSTI ID:6339625

Cox, N D

Described is a method of reducing the amount of sulfur dioxide in combustion gases generated by the combustion of a sulfur-containing fuel in a combustion chamber, including the steps of combusting the sulfur-containing fuel in the combustion chamber to generate combustion gases including sulfur dioxide; introducing a sorbent composition into the combustion chamber at a combustion zone above a fuel and flame area of the combustion chamber, said combustion zone having a sufficient temperature to calcine the sorbent composition; and calcining the sorbent composition in the combustion zone to allow interactions between the calcined sorbent composition and sulfur dioxide in the combustion gases to form a solid inorganic sulfate and decrease the amount of sulfur dioxide in the combustion gases; the improvement comprising introducing into the combustion chamber a sorbent composition comprising: (a) 100 parts by weight of a sorbent, and (b) about 0.25 parts to about 60 parts by weight of an enhancer, said enhancer comprising: (i) about 15% to about 75% by weight of a hydrated inorganic salt; (ii) about 25% to about 85% by weight of a clay; and (iii) 0% to about 10% by weight of a combustible liquid.

• Assignee: American Oxycarb Corp., Chicago, IL (United States)
• Patent Number(s): US 5220875; A
• Application Number: PPN: US 7-869468
• OSTI ID: 6339625
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ADDITIVES
ADSORBENTS
AIR POLLUTION ABATEMENT
CALCINATION
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COMBUSTION CHAMBERS
DECOMPOSITION
DESULFURIZATION
FLUE GAS
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
PYROLYSIS
SORBENT INJECTION PROCESSES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
WASTES