H2S SEPARATOR; H2S COLLECTION PROCESS FROM AN AUTOMOBILE EXHAUST SYSTEM; PROCESS FOR ITS MANUFACTURING; AND AUTOMOBILE ENGINE EXHAUST SYSTEM

摘要

An add-on H2S trap for use after an auto exhaust catalyst has an H2S-getter metal oxide which traps the H2S by the following reaction: MO+H2S-MS+H2O and the H2S-getter metal oxide is self-regenerating via the following reaction: IMAGE The H2S-getter metal oxide has little tendency to form sulfates at a temperature greater than approximately 500 DEG C. Preferred metal oxides are iron, nickel and cobalt and they can be distended over a support.