Catalytic activity of PAN-based active carbon fibre (PAN-ACF) activated with sulphuric acid for reduction of nitric oxide with ammonia

✍ Scribed by Yoshinobu Komatsubara; Shiro Ida; Hiroshi Fujitsu; Isao mochida

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 508 KB
• Volume: 63
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(84)90110-8

✦ Synopsis

Catalytic activity of PAN-ACF activated with sulphuric acid was studied in a closed circulating reactor for the reduction of nitric oxide with ammonia at 423 K. Its activity was enhanced by activation to five times that of the original ACF, being the highest of the active carbons examined in the study. Influences of activation conditions in terms of the impregnation level of sulphuric acid and the activation temperature, and the adsorption ability of the fibre against nitric oxide and ammonia revealed that ammonia, irreversibly adsorbed on the acid sites provided by sulphuric acid after its proper evacuation, is the major reactive species for the reduction. Some activation of nitric oxide is also assumed on the oxidized site of the carbon surface for easier fission of its N-O bond, since NO decomposition is enhanced by activation with sulphuric acid. Activity decreased with repeated runs and is discussed from the point of view of products as poisons.