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ENHANCEMENT OF REACTIVITY IN SURFACTANT-MODIFIED SORBENTS FOR SULFUR DIOXIDE CONTROL

Citation:

Kirchgessner*, D A. AND W. Jozewicz. ENHANCEMENT OF REACTIVITY IN SURFACTANT-MODIFIED SORBENTS FOR SULFUR DIOXIDE CONTROL. I & EC RESEARCH 28(4):413-418, (1989).

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Description:

Injection of calcium-based sorbents into the postflame zone of utility boilers is capable of achieving sulfur dioxide (SO2) captures of 50-60% at a stoichiometry of 2. Calcium hydroxide [Ca(OH)2] appears to be the most effective commercially available sorbent. Recent attempts to modify Ca(OH)2 by adding calcium lignosulfonate with the water of hydration have succeeded in enhancing its effectiveness. The particle size reduction, which in some applications accompanies lignosulfonate addition, does not appear to be a prerequisite for increased SO2 capture. Similarly, the accelerated rate of dehydration observed in modified hydroxides does not appear to be an important mechanism in the enhancement. The primary cause of increased reactivity in modified sorbents is the ability of calcium lignosulfonate to retard the rate of sintering and thus to retain pore volume and reactive surface area.

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Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Product Published Date: 04/01/1989
Record Last Revised: 08/30/2009
OMB Category: Other
Record ID: 129224

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

AIR POLLUTION PREVENTION AND CONTROL DIVISION

ATMOSPHERIC PROTECTION BRANCH