Effects of preparation conditions on the properties of the vanadium based middle-low temperature SCR catalysts modified with antimony and tungsten

JIANG Chao; ZHONG Zhao-ping; HUANG Jin

Volume 47 Issue 11

Nov. 2019

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JIANG Chao, ZHONG Zhao-ping, HUANG Jin. Effects of preparation conditions on the properties of the vanadium based middle-low temperature SCR catalysts modified with antimony and tungsten[J]. Journal of Fuel Chemistry and Technology, 2019, 47(11): 1394-1400.

Citation:

JIANG Chao, ZHONG Zhao-ping, HUANG Jin. Effects of preparation conditions on the properties of the vanadium based middle-low temperature SCR catalysts modified with antimony and tungsten[J]. Journal of Fuel Chemistry and Technology, 2019, 47(11): 1394-1400.

Citation:

JIANG Chao, ZHONG Zhao-ping, HUANG Jin. Effects of preparation conditions on the properties of the vanadium based middle-low temperature SCR catalysts modified with antimony and tungsten[J]. Journal of Fuel Chemistry and Technology, 2019, 47(11): 1394-1400.

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Effects of preparation conditions on the properties of the vanadium based middle-low temperature SCR catalysts modified with antimony and tungsten

Key Laboratory of Energy Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

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Jiangsu Provincial Policy Guidance Program BY2015070-21

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Corresponding author: ZHONG Zhao-ping, E-mail:zzhong@seu.edu.cn
Received Date: 2019-08-12
Rev Recd Date: 2019-09-17

Available Online: 2021-01-23

Publish Date: 2019-11-10

Abstract

Abstract

Combined with the superior resistance to sulfur as well to water of antimony, and the ability of tungsten to increase the activity of vanadium-based catalysts, antimony and tungsten were used as promoters to prepare the V-W-Sb/Ti catalysts using impregnation method, and the denitrification of the modified catalysts made by different preparation conditions was investigated. The tests of the activity and the resistance to H₂O and SO₂ were carried out in a fixed bed reactor, and the catalysts were characterized by N₂ physical adsorption-desorption, X-ray diffraction, NH₃-TPD test and H₂-TPR. In the case of the selected catalyst formulation 3V₂O₅-5WO₃-2Sb₂O₃/90TiO₂, the experimental results show that the catalyst prepared by using antimony acetate as the precursor has better activity than that prepared by using antimony chloride as precursor; the catalyst prepared by calcination at 400℃ has higher denitrification efficiency than that prepared at 500℃; the difference in the number of impregnation steps has a limited effect on the activity of the catalyst. At the denitrification temperature of 180℃, and 10% (volume ratio) H₂O and 0.01%SO₂ added in the feed gas, under the same calcination temperature, the activity of the catalyst prepared by two-step impregnation and using antimony acetate as the precursor is only 2% higher than the catalyst prepared by one-step impregnation and using antimony chloride as the precursor, the latter one has a simple and convenient preparation process, so it has more industrial application value.
- catalyst,
- SCR,
- Sb-W,
- medium and low temperature,
- preparation conditions

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References(30)

References

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