Temperature-programmed desorption study of Na2CO3-containing activated carbon

✍ Scribed by Teus Wigmans; Joep van Doorn; Jacob A. Moulijn

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 728 KB
• Volume: 62
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(83)90196-5

✦ Synopsis

The technique of temperature-programmed desorption (TPD) appears to be a powerful means of studying the catalytic action of sodium carbonate as a gasification catalyst. Carbonate decomposition, enhanced by carbon, and reduction to the metallic state can be identified by separate desorption peaks. After controlled adsorption of oxygen, carbon dioxide and water vapour at relatively low temperatures, similar desorption patterns are obtained that are a measure for catalytically active species during gasification. Therefore, these patterns have a predictive value for the activity of alkali metal catalysts and give additional information on processes that control their catalytic action and the influence of pretreatment and partial burn-off on their performance.