Nitrogen-promoted active carbons as catalytic supports: 2. The influence of Mn promotion on the structure and catalytic properties in SCR

✍ Scribed by T. Grzybek; J. Klinik; M. Motak; H. Papp

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 609 KB
• Volume: 137
• Category: Article
• ISSN: 0920-5861
• DOI: 10.1016/j.cattod.2007.11.006

✦ Synopsis

Catalytic properties of active carbons treated with N-compounds and promoted with manganese oxides were studied in selective catalytic reduction of NO with ammonia. The following elements of the preparation had a beneficial effect on activity and selectivity of the catalysts: preoxidation of active carbon prior to the introduction of N-species, the choice of N-compound, together with the post-treatment procedure, and the optimisation of the amount of active material. Apart from the introduction of N-surface groups, it was important to control the amount of acidic surface species which in turn determined the distribution of MeO x and reducibility of the samples, thus influencing the formation of undesired byproduct (N 2 O).