Study on the modification effect of TiO<sub>2</sub> support on the low temperature denitration activity of Mn-Ce/TiO<sub>2</sub> catalysts

MA Teng-kun; FANG Jing-rui; SUN Yong; WANG Lan

Volume 45 Issue 4

Apr. 2017

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Article Navigation > Journal of Fuel Chemistry and Technology > 2017 > 45(4): 491-496

MA Teng-kun, FANG Jing-rui, SUN Yong, WANG Lan. Study on the modification effect of TiO2 support on the low temperature denitration activity of Mn-Ce/TiO2 catalysts[J]. Journal of Fuel Chemistry and Technology, 2017, 45(4): 491-496.

Citation:

MA Teng-kun, FANG Jing-rui, SUN Yong, WANG Lan. Study on the modification effect of TiO₂ support on the low temperature denitration activity of Mn-Ce/TiO₂ catalysts[J]. Journal of Fuel Chemistry and Technology, 2017, 45(4): 491-496.

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Study on the modification effect of TiO₂ support on the low temperature denitration activity of Mn-Ce/TiO₂ catalysts

State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China

Funds:

the National Science and Technology Support Program 2013BAC13B01

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Corresponding author: WANG Lan, Tel:010-51167476, E-mail:wanglan@cbmamail.com.cn
Received Date: 2016-06-15
Rev Recd Date: 2017-02-15

Available Online: 2021-01-23

Publish Date: 2017-04-10

Abstract

Abstract

Low-temperature selective catalytic reduction (SCR) catalysts were prepared by step wise blending method with TiO₂, TiO₂-Al₂O₃ and TiO₂-SiO₂ as support and Mn as active component, Ce as promoter. The effects of doping Al₂O₃ and SiO₂ to TiO₂ support on NO_x removal activity of the catalysts were systematically investigated. The catalysts were characterized by XRD, BET surface area, SEM, H₂-TPR and NH₃-TPD. It was found that the specific surface area, pore structure parameters and surface pore structure morphology of the catalysts were improved and the TiO₂ crystallinity of Mn-Ce/TiO₂-Al₂O₃ and Mn-Ce/TiO₂-SiO₂ catalysts were reduced to some extent by doping SiO₂, Al₂O₃ on TiO₂ support respectively. The low temperature reduction peak area, acid type and acidity of catalysts surface were improved significantlybydoping modification. All of these were beneficial to enhance the denitration activity of the catalysts. The denitration activity of the catalysts was increased to a great extent by doping SiO₂ and Al₂O₃ on TiO₂ support respectively, the order of SCR activity of three kinds of catalysts above was:Mn-Ce/TiO₂-SiO₂ > Mn-Ce/TiO₂-Al₂O₃ > Mn-Ce/TiO₂ when the SCR reaction temperature was in the range of 80-140℃.
- titania,
- doped modification,
- low temperature denitration activity

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References(15)

References

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