Article ID Journal Published Year Pages File Type
55273 Catalysis Today 2012 6 Pages PDF
Abstract

CoSiBEA zeolite with 0.9 wt.% Co is prepared in acidic (pH = 2.5) condition by a two-step postsynthesis method which allows to incorporate cobalt into framework zeolite as isolated tetrahedral Co(II) species, as evidenced by XRD and diffuse reflectance UV–vis. As obtained Co(II)-single site zeolite catalyst with isolated and framework Co centres are active in SCR of NO process with C2 (ethanol and ethylene) reducing agents, with selectivity toward N2 exceeding 90% in the temperature range from 575 to 675 K for maximum NO conversion about 70 and 65% at 625 K for ethanol and ethylene, respectively. In contrast, this catalyst is much less active with C1 (methanol and methane) reducing agents, with maximum selectivity toward N2 not exceeding 22% with methanol and 18% with methane for maximum NO conversion of 20 and 18%, respectively.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (226 K)Download as PowerPoint slideHighlights► Two-step postsynthesis method allows control the incorporation of cobalt into framework of BEA zeolite. ► Cobalt is incorporated as isolated tetrahedral Co(II) species. ► The Co(II)-single site CoSiBEA zeolite catalyst with isolated and framework Co centres are active in SCR of NO process with C2 (ethanol and ethylene) reducing agents.

Related Topics
Physical Sciences and Engineering Chemical Engineering Catalysis
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