V2O5-WO3/TiO2 Catalysts for Low Temperature NH3 SCR: Catalytic Activity and Characterization

Yu Xin Deng; Xin Chen; Rong Shao; Li Ming Hu; Jie Tang; Chong Qing Wang

doi:10.4028/www.scientific.net/KEM.697.275

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 697V2O5-WO3/TiO2 Catalysts for Low Temperature NH3...

V₂O₅-WO₃/TiO₂ Catalysts for Low Temperature NH₃ SCR: Catalytic Activity and Characterization

Abstract:

A systematic investigation of the effect of WO₃ loading over V₂O₅/TiO₂ catalysts was carried out for the selective catalytic reduction of NO by NH₃. The characteristics were examined use BET surface area , X-ray diffractometry (XRD) , Temperature programmed desorption (TPD) of NH₃ . It was fund that the WO₃species could interact with the TiO₂anatase phase to exhibits a high activity. With increasing WO₃ content ,the activity of V-W/TiO₂ for the selective catalytic reduction of NO by NH₃ was improved at low temperatures in the range of 3～7%. The results showed that the adding of WO₃ to V₂O₅/TiO₂ could result in exposing acid sites of catalysts doped WO₃ at low temperature. Furthermore, especially the catalytic activity of VW₇Ti showed higher than 80% at 180 °C. However, the catalytic BET surface area and the mass of acid sites not play a leading role for improving low-temperature activity of VWTi in this paper.

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Periodical:

Key Engineering Materials (Volume 697)

Pages:

275-278

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.697.275

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Online since:

July 2016

Authors:

Yu Xin Deng, Xin Chen, Rong Shao, Li Ming Hu, Jie Tang, Chong Qing Wang

Keywords:

Catalyst, Metal Oxides, Selective Catalytic Reduction, V₂O₅

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