A novel CuTi-containing catalyst derived from hydrotalcite-like compounds for selective catalytic reduction of NO with C3H6 under lean-burn conditions
Access Status
Authors
Date
2014Type
Metadata
Show full item recordCitation
Source Title
ISSN
Collection
Abstract
A series of hydrotalcite-based CuxTi1 (x = 2, 3, 4, 5)-mixed oxide catalysts have been synthesized by homogeneous precipitation and tested in the selective catalytic reduction (SCR) of NO by C3H6 in the presence of excess oxygen. Cu atoms can be categorized into surface and bulk species. The surface Cu species are the active sites while the bulk Cu species possess adsorption property for nitrogen species, and such bulk Cu species varies from CuxTiyOz to CuO with increasing Cu content. The Cu3Ti1 catalyst with the highest amount of surface copper and Lewis acid sites exhibits the best catalytic performance due to its improved electrophilicity of CuxTiyOz, which enhance the adsorption capability of nitrogen species. In situ infrared characterization revealed that nitrates in terms of bridging, bidentate and chelating species are reactive toward acetate and formate, and they are the key intermediates produced during the SCR of NO.
Related items
Showing items related by title, author, creator and subject.
-
Yip, Kong; Xu, M.; Li, Chun-Zhu; Jiang, San Ping; Wu, Hongwei (2011)This study reports a mechanistic investigation on the thermal annealing process at mild temperatures (750 and 900 C) and its effect on the reactivity of biochar prepared from the pyrolysis of a Western Australia mallee ...
-
Syed Hassan, Syed Shatir Asghrar (2010)The conversion of light hydrocarbons with solid catalysts is an important class of reactions in the chemical and energy industries. Our knowledge on the exceedingly complex reaction kinetics of these catalytic reactions, ...
-
Wang, Y.; Cao, H.; Chen, L.; Chen, C.; Duan, Xiaoguang; Xie, Y.; Song, W.; Sun, Hongqi; Wang, Shaobin (2018)© 2018 Elsevier B.V. Anode graphite was recovered from a spent lithium ion battery (LIB) and reutilized as a carbon precursor to obtain graphene-based materials. Characterization results revealed that impurities were ...