Abstract:
:Ce/TiO2-SiO2 catalysts with different Ti/Si molar ratios are prepared by the incipient impregnation method and their NH3-SCR activities are evaluated at 100-500°C on a fixed reactor. The Ce/TiO2-SiO2 (3/1) catalyst, modified by non-thermal plasma (NTP) treatment and then activated by thermal treatment at 500°C for 4 h, exhibits best performance. Comprehensive deNOx performance of the catalyst is evidently improved and its efficiency reaches up to 99.21% at 350°C. NO conversion efficiency of the treated catalyst doped with K remains about 90.23% at 300°C and the catalyst also shows improved activity at lower temperatures. Various characterization methods show that the activity enhancement is correlated only with NTP treatment, as it increases the number of Ce3+ species, which generates more chemisorbed oxygen, leads to improved dispersion of Brønsted and Lewis acidic sites and finally has an inherent etching effect.
journal_name
Environ Technoljournal_title
Environmental technologyauthors
Chen K,Chen R,Cang H,Mao A,Tang Z,Xu Qdoi
10.1080/09593330.2017.1337237subject
Has Abstractpub_date
2018-07-01 00:00:00pages
1753-1764issue
14eissn
0959-3330issn
1479-487Xjournal_volume
39pub_type
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