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The modification of Ag/Al2O3 catalyst and application of combined catalysts in methanol-SCR of NO

Publication ,  Journal Article
Zou, S; Cao, Y; Lan, L; Sun, M; Chen, S; Yang, Z; Xu, B; Chen, Y
Published in: Canadian Journal of Chemical Engineering
December 1, 2015

In this paper, a series of Wx/Ag/Al2O3 catalysts with different tungsten contents (0, 0.04, 0.06, 0.08, and 0.10g/g) and 0.03g/g silver for selective catalytic reduction of NO with methanol under excess oxygen (methanol-SCR), were prepared with a traditional impregnation method. At a gas hourly space velocity (GHSV) of 30000h-1, the operating window of NO conversion (NO conversion above 50%) shifted to a higher temperature region as the tungsten content increased. Importantly, the operating window of NO conversion over combined catalysts containing W8/Ag/Al2O3 in the front and Ag/Al2O3 in the rear (W8/Ag/Al2O3+Ag/Al2O3), was wider (65°C) than that of the single W8/Ag/Al2O3 catalyst (50°C) or Ag/Al2O3 catalyst (41°C). Further, the CO concentration over the combined catalyst was lower than the single W8/Ag/Al2O3 catalyst. The characterization results demonstrated that there are strong interactions between tungsten and silver which contribute to the formation and stabilization of oxidized silver species.

Duke Scholars

Published In

Canadian Journal of Chemical Engineering

DOI

EISSN

1939-019X

ISSN

0008-4034

Publication Date

December 1, 2015

Volume

93

Issue

12

Start / End Page

2117 / 2123

Related Subject Headings

  • Chemical Engineering
  • 0914 Resources Engineering and Extractive Metallurgy
  • 0904 Chemical Engineering
 

Citation

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Zou, S., Cao, Y., Lan, L., Sun, M., Chen, S., Yang, Z., … Chen, Y. (2015). The modification of Ag/Al2O3 catalyst and application of combined catalysts in methanol-SCR of NO. Canadian Journal of Chemical Engineering, 93(12), 2117–2123. https://doi.org/10.1002/cjce.22328
Zou, S., Y. Cao, L. Lan, M. Sun, S. Chen, Z. Yang, B. Xu, and Y. Chen. “The modification of Ag/Al2O3 catalyst and application of combined catalysts in methanol-SCR of NO.” Canadian Journal of Chemical Engineering 93, no. 12 (December 1, 2015): 2117–23. https://doi.org/10.1002/cjce.22328.
Zou S, Cao Y, Lan L, Sun M, Chen S, Yang Z, et al. The modification of Ag/Al2O3 catalyst and application of combined catalysts in methanol-SCR of NO. Canadian Journal of Chemical Engineering. 2015 Dec 1;93(12):2117–23.
Zou, S., et al. “The modification of Ag/Al2O3 catalyst and application of combined catalysts in methanol-SCR of NO.” Canadian Journal of Chemical Engineering, vol. 93, no. 12, Dec. 2015, pp. 2117–23. Scopus, doi:10.1002/cjce.22328.
Zou S, Cao Y, Lan L, Sun M, Chen S, Yang Z, Xu B, Chen Y. The modification of Ag/Al2O3 catalyst and application of combined catalysts in methanol-SCR of NO. Canadian Journal of Chemical Engineering. 2015 Dec 1;93(12):2117–2123.
Journal cover image

Published In

Canadian Journal of Chemical Engineering

DOI

EISSN

1939-019X

ISSN

0008-4034

Publication Date

December 1, 2015

Volume

93

Issue

12

Start / End Page

2117 / 2123

Related Subject Headings

  • Chemical Engineering
  • 0914 Resources Engineering and Extractive Metallurgy
  • 0904 Chemical Engineering