Solid P-W Keggin Heteropoly Compounds as Effective Catalysts for the Sorption-Decomposition of NOX

Abstract:

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Several new heteropoly compounds catalysts with pronounced activities in NOx conversion via adsorption-decomposition process in a fixed-bed reactor were evaluated concerning the principal internal and external factors having marked effects on the process of adsorption. Results showed that substitution of H+ in HPW (H3PW12O40•6H2O) by NH4+ results in marked enhancement of the catalyst activity, however, substitution of coordination atom W in the [PW12O40]3- anion by one or more Mo atoms tends to lower the catalyst activity and such tendency deepens with the increase in the Mo atom numbers introduced. It is for the first time that the nano-effect was observed with nano (NH4)3PW12O40 catalyst, in which a 1.6% to 10.6% enhancement in NOx adsorption efficiency was obtained in comparison with the same catalyst in normal particle size. By IR analysis, NO was found to be adsorbed via interaction with the proton of HPW structure. With the aid of GC-MS analysis, the process effectiveness for NOx decomposition into N2 was confirmed.

Info:

Periodical:

Advanced Materials Research (Volumes 233-235)

Edited by:

Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He

Pages:

355-358

DOI:

10.4028/www.scientific.net/AMR.233-235.355

Citation:

R. Wang et al., "Solid P-W Keggin Heteropoly Compounds as Effective Catalysts for the Sorption-Decomposition of NOX", Advanced Materials Research, Vols. 233-235, pp. 355-358, 2011

Online since:

May 2011

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Price:

$35.00

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