Process for reducing sulfur in coal char

Patent · Tue Jul 20 04:00:00 EDT 1976

OSTI ID:862599

Gasior, Stanley J ^[1]; Forney, Albert J ^[2]; Haynes, William P ^[1]; Kenny, Richard F ^[3]

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1. Pittsburgh, PA
2. Coraopolis, PA
3. Venetia, PA

Coal is gasified in the presence of a small but effective amount of alkaline earth oxide, hydroxide or carbonate to yield a char fraction depleted in sulfur. Gases produced during the reaction are enriched in sulfur compounds and the alkaline earth compound remains in the char fraction as an alkaline earth oxide. The char is suitable for fuel use, as in a power plant, and during combustion of the char the alkaline earth oxide reacts with at least a portion of the sulfur oxides produced from the residual sulfur contained in the char to further lower the sulfur content of the combustion gases.

• Research Organization: BUREAU OF MINES
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 3970434
• OSTI ID: 862599
• Country of Publication: United States
• Language: English

Related Subjects

/44/48/201/252/
alkaline
alkaline earth
amount
carbonate
char
coal
coal char
combustion
combustion gas
combustion gases
compound
compounds
contained
content
depleted
earth
earth compound
earth oxide
effective
effective amount
enriched
fraction
fuel
gases
gases produced
gasified
hydroxide
oxide
oxides
oxides produced
plant
portion
power
power plant
presence
process
produced
reaction
reacts
reducing
reducing sulfur
remains
residual
suitable
sulfur
sulfur compound
sulfur compounds
sulfur content
sulfur oxide
sulfur oxides
yield