Process for the purification of gases

US5840174A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Thomas Lehmann · Langenselbold, DE
• Dieter Engel · Kelsterbach, DE
• Rainer Sanzenbacher · Gelnhausen, DE

Key dates

• Filing date: Aug 30, 1996
• Grant date: Nov 24, 1998
• Expiry date: Aug 30, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2101/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the electrolytic removal of contaminants from gases, wherein a gas and a liquid electrolyte are passed co- or counter-currently through a fixed bed electrode of an electrolysis cell which has a counterelectrode separated from the fixed bed electrode by a separator and the contaminant is electrochemically converted at an effective cell voltage. Such cells have hitherto been operated in a flooded state. The degree of purification may be substantially increased if the fixed bed electrode is operated as a trickle bed reactor.