Process for removing sulfur from sulfur-containing gases

Patent · Tue Feb 14 04:00:00 EST 1989

OSTI ID:6162988

Rochelle, G T; Jozewicz, W

A process is described for reducing the level of sulfur, the sulfur being generally in the form of sulfur dioxide in a sulfur dioxide-containing gas, comprising the steps of: preparing an aqueous slurry comprising a calcium alkali together with a calcium-reactive silica or alumina which are present in amounts sufficient to allow for the formation of a sulfur dioxide-absorbing component which includes a calcium silicate or calcium aluminate; heating the slurry to a temperature between about 40/sup 0/ and about 200/sup 0/C to facilitate in the formation of the sulfur dioxide-absorbing component; atomizing the slurry into a stream of the sulfur dioxide-containing gas; drying the resulting atomized droplets so as to form a gas/solid suspension having a gaseous component and solid component which includes the sulfur dioxide-absorbing component; retaining the gaseous and solid components in contact in a manner sufficient to allow for the absorption of sulfur dioxide by the absorbing component; and separating the absorbing component in the form of spent solids from the gas.

• Assignee: Board of Regents, Univ. of TX Systems, Austin, TX
• Patent Number(s): US 4804521
• OSTI ID: 6162988
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
ADSORBENTS
ADSORPTION
AIR POLLUTION CONTROL
ALKALINE EARTH METALS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AQUEOUS SOLUTIONS
ATOMIZATION
CALCIUM
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
DISPERSIONS
DRYING
ELEMENTS
GASEOUS WASTES
HEATING
HIGH TEMPERATURE
METALS
MINERALS
MIXTURES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REMOVAL
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOLUTIONS
SORPTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES