Method for renewed activation of honeycomb-shaped catalyst elements for denitrating flue gases

US6387836B1 · kind B1 · utility

Assignee

• SaarEnergie GmbH · DE

Inventors

• Heinz-Kurt Dörr · Sankt Ingbert, DE
• Georg Koch · Unterschleißheim, DE
• Walter Bastuck · Lebach, DE

Key dates

• Filing date: Mar 8, 1999
• Grant date: May 14, 2002
• Expiry date: Mar 8, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J38/48
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a method for renewed activation of honeycomb-shaped catalyst elements for denitrating flue gases from fossil fuel-fired boiler plants, specially coal-fired boiler plants in large power stations. According to the invention, each catalyst element if mechanically cleaned using oil and water-free compressed air before mounting. Subsequently, each element is subjected to wet chemical cleaning using fully desalinated water and dried with oil and water-free compressed air. The inventive method enables the activity of used catalyst elements to be increased from less than 50% to more than 83% of original activity.