Abstract
Removal of SO 2 and NO x by pulsed corona combined with in situ alkali absorption was experimentally investigated. In the reactor, a plate-wire-plate combination is devised for generating pulsed corona and then alkaline absorbent slurries were introduced into the reactor by a continuous band conveying system to capture the gaseous reaction products. It was found that both SO 2 and NO could be removed by corona combined with in situ alkali absorption. The removal of SO 2 increased to 75% with the corona discharge, compared with 60% removal only with Ca(OH) 2 absorption. About 40% removal of NO was reached by pulsed corona combined with in situ Ca(OH) 2 absorption. It was found that SO 2 and NO in the gas stream are oxidized to SO 3 and NO 2 by pulsed corona respectively, and then absorbed by the alkali in the reactor. The removals of SO 2 as well as NO were higher with Ca(OH) 2 as the absorbent, compared with using CaCO 3 or ZnO.
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