Low temperature dry scrubbing reaction kinetics and mechanisms, Volume 1

Technical Report · Thu Oct 01 00:00:00 EDT 1992

OSTI ID:6871315

Prudich, M E; Sampson, K J; Reddy, S N; Maldei, M; Ben-Said, L ^[1]

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1. Ohio Univ., Athens, OH (United States)

Dry scrubbing that takes place after the air preheater (<350[degree]F) is the mode of operation that is of primary interest to this research project. At the relatively low temperatures that occur in this region of operation the rate of the gas-solid reaction that drives SO[sub 2] capture in the convective (800 to 1200[degree]F) and the combustion (1600 to 2400[degree]F) zones is too slow to be significant. The presence of significant amounts of either liquid-phase or vapor-phase water is required in order to mediate SO[sub 2] capture and to produce reasonable capture rates. A mathematical process model describing the cross-flow, moving-bed Limestone Emission Control (LEC) process has been formulated. This process model incorporates the resistance-in-series SO[sub 2] capture kinetic model described in the Project Year [number sign]1 final report. The kinetic model formulated during Project Year [number sign]1 pointed to limestone solubility and rate of solubilization as being key factors in determining the rate of SO[sub 2] capture in wetted limestone (LEC) scrubbing systems. In Project Year [number sign]2, limestone solubilities and rates of solubilization are being determined for a suite of Ohio limestones.

• Research Organization: Ohio Coal Development Office, Columbus, OH (United States); Ohio Univ., Athens, OH (United States)
• Sponsoring Organization: STOFOH; Ohio State Government, Columbus, OH (United States)
• OSTI ID: 6871315
• Report Number(s): OCDO-93006591; ON: TI93006591; CNN: CDO/R-87-2C/B
• Country of Publication: United States
• Language: English

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