Catalytic reduction of nitric oxide over activated carbons

Autor: B. McEnaney, S.N. Ahmed, Robert M. Baldwin, Frank Derbyshire, John M. Stencel
Rok vydání: 1993
Předmět:
Zdroj: Fuel. 72:287-292
ISSN: 0016-2361
DOI: 10.1016/0016-2361(93)90044-3
Popis: The reduction of NO to N 2 using NH 3 as a reductant over activated carbons was investigated using an integral reactor system. The effects of varying the gas-phase and surface oxygen concentrations were studied in detail. Surface oxygen was introduced by treating a coconut shell activated carbon with sulphuric acid at 100–300 °C. The type and concentration of surface oxides were investigated by infrared spectroscopy, linear temperature-programmed desorption of surface oxides, and adsorption of reactant gases. Increasing the gas-phase oxygen concentration increased NO conversion significantly. The activity of activated carbon at reaction temperatures > 150 °C was enhanced by sulphuric acid treatment. Sulphuric acid acted as an oxidizing agent and created acidic surface functionalities including carboxyl and carbonyl groups.
Databáze: OpenAIRE
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