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 NO x 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 oxide sorber component, and a modifier; and an oxidation catalyst (B) disposed on a high suface area support or an absorber material. The sulfur a nd NO x compounds are removed from the exhaust (1) into catalyst system and retained therein to remove and retain the sulfur an d NO x compounds. The reducing and regenerating gas (8) removes and retains said sulfur compounds and NO x is restored. In the t wo bed system, the catalyst system is regenerated with a regenerating gas (8) flowing in a direction reversed from direction of the exhaust gas (1).