| 摘要 |
Solid sorbents (acceptors) for noxious components, e.g. SOx, NOx and HX, from gases below about 250 DEG , specifically acceptors that contain hydrated divalent metal oxide coated onto an exfoliated or expanded mineral support, are improved by heating them before use at a temperature of 450 DEG -650 DEG for a conditioning period of at least a few minutes. So conditioned pulverulent MgO coated onto water-laden exfoliated vermiculite (alternatively expanded perlite) is preferred because of capacity and the ability of the magnesia-based acceptors to be regenerated at a moderately elevated temperature that precludes substantial deterioration of acceptor or equipment. To insure immediate activity the conditioned acceptor is moistened for use. Advantageously the gas and/or the acceptor is humidified during their contact.
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