PROCESS, CATALYST SYSTEM, AND APPARATUS FOR TREATING SULFUR COMPOUND CONTAINING EFFLUENT

摘要

The process contacts a gaseous stream (1) containing gaseous sulfur compound s and NOx with a catalyst system of either: an oxidation catalyst disposed on a high surface area support or an absorber material; or of discrete beds of a catalyst/sorber (A) comprising a noble metal catalyst component, a metal oxi de sorber component, and a modifier; and an oxidation catalyst (B) disposed on a high suface area support or an absorber material. The sulfur and NOx compoun ds are removed from the exhaust (1) into catalyst system and retained therein t o remove and retain the sulfur and NOx compounds. The reducing and regeneratin g gas (8) removes and retains said sulfur compounds and NOx is restored. In th e two bed system, the catalyst system is regenerated with a regenerating gas ( 8) flowing in a direction reversed from direction of the exhaust gas (1).