A Study on the Effect of Low-Temperature Activity on Vanadium Catalysts 


Vol. 26,  No. 4, pp. 321-328, Dec.  2020
10.7464/ksct.2020.26.4.321


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  Abstract

This experiment compared V/W/TiO2 and V/Mo/TiO2 catalysts that were used for commercial catalysts. The effects of SCR reactions on low-temperature activity were studied. NH3-TPD, DRIFT, and H2-TPR analysis, alongside O2-on/off experiments, were conducted to identify the effects of NH3 acid sites and oxygen participating in the SCR reaction, which had a significant impact on the NH3-SCR reaction. The effect on activity was analyzed at 250 ℃, a high temperature of reaction activity, and 180 ℃, which showed significant activity degradation. In NH3 involved in the SCR reaction at 250 ℃, B and L acid sites contributed to the reaction. In particular, the B acid site was found to have significantly participated in the reaction and affected the NH3-SCR activity, which was reduced at 180 ℃ to affect the activity degradation. Also, atmospheric oxygen contributed to the SCR reaction, causing the active property to facilitate reaction activity at 250 ℃. However, oxygen did not comprise the reaction at 180 ℃, indicating a drop inactivity. Therefore, the B acid site was reduced, and the activity was judged to be degraded due to failure to share in the reaction and low effects by atmospheric oxygen.

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  Cite this article

[IEEE Style]

Y. JH and H. SC, "A Study on the Effect of Low-Temperature Activity on Vanadium Catalysts," Clean Technology, vol. 26, no. 4, pp. 321-328, 2020. DOI: 10.7464/ksct.2020.26.4.321.

[ACM Style]

Yeo JH and Hong SC. 2020. A Study on the Effect of Low-Temperature Activity on Vanadium Catalysts. Clean Technology, 26, 4, (2020), 321-328. DOI: 10.7464/ksct.2020.26.4.321.

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