Method of capturing sulfur in coal during combustion and gasification

Patent · Tue Jun 26 04:00:00 EDT 1990

OSTI ID:6574205

Feldman, H F; Kim, B C

This patent describes a method of combusting solid particulate carbonaceous fuel containing sulfur. It comprises: treating the fuel by mixing it with an aqueous solution including a calcium-containing sulfur absorbent at least ambient temperature to mix the sulfur absorbent with the fuel; providing a reactor and exposing the treated fuel to a reducing atmosphere in the reactor at a temperature of between about 1500{degrees}F and about 1800{degrees}F for converting at least about 20% of the solid carbonaceous material in the fuel to the gaseous state while forming a solid char material containing the sulfur and compounds of calcium; and providing a combustor and passing the char material from the reactor to the combustor and combusting the char material in the combustor at a temperature of at least about 2100{degrees}F in the presence of sufficient oxygen to promote the reaction of the sulfur and the compounds of calcium to form calcium sulfate, thereby forming gaseous combustion products substantially free of gaseous sulfur compounds and an ash containing sulfur fixed therein as calcium sulfate.

• Assignee: Battelle Development Corp., Columbus, OH (USA)
• Patent Number(s): A; US 4936047
• Application Number: PPN: US s 7-186659
• OSTI ID: 6574205
• Country of Publication: United States
• Language: English

Related Subjects

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540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION ABATEMENT
AQUEOUS SOLUTIONS
CHEMICAL REACTIONS
COAL FINES
COAL GASIFICATION
COMBUSTION
DESULFURIZATION
DISPERSIONS
GASIFICATION
MIXTURES
OXIDATION
POLLUTION ABATEMENT
SOLUTIONS
THERMOCHEMICAL PROCESSES