Effect of preparation and reaction conditions on the performance of In/H-Beta for selective catalytic reduction of NOx with CH4

Jiuhu Zhao; Gaige Zhang; Jiansheng He; Zhengzhong Wen; Zhi Li; Tingkun Gu; Ran Ding; Yongji Zhu; Rongshu Zhu

doi:10.1016/j.chemosphere.2020.126458

Effect of preparation and reaction conditions on the performance of In/H-Beta for selective catalytic reduction of NO_x with CH₄

Chemosphere. 2020 Aug:252:126458. doi: 10.1016/j.chemosphere.2020.126458. Epub 2020 Mar 11.

Authors

Jiuhu Zhao¹, Gaige Zhang¹, Jiansheng He², Zhengzhong Wen¹, Zhi Li¹, Tingkun Gu¹, Ran Ding¹, Yongji Zhu¹, Rongshu Zhu³

Affiliations

¹ Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Environmental Science and Engineering Research Center, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China.
² Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Environmental Science and Engineering Research Center, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China; Shanxi Academy of Analytical Sciences, Taiyuan, 030006, PR China.
³ Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Environmental Science and Engineering Research Center, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China. Electronic address: rszhu@hit.edu.cn.

PMID: 32199163
DOI: 10.1016/j.chemosphere.2020.126458

Abstract

In/H-Beta catalyst was prepared by optimizing the support, concentration of ion exchange liquid and calcination temperature to investigate the effects of synthesis conditions on catalytic activity of selective catalytic reduction of NO_x with CH₄. The results showed that the In/H-Beta catalyst exhibited the superior activity when concentration of exchange liquid was 0.033 M and calcination temperature was 500 °C, the NO_x removal ratio could reach 97.6%. In addition, reaction conditions could affect the catalytic performance. When O₂ concentration was 10%, CH₄:NO ratio was no less than one, space velocity was lower than 23600 h^-1 and NO initial concentration was no more than 700 ppm, In/H-Beta could exhibit superior catalytic activity. Moreover, the catalytic performances of In/H-Beta catalysts were discussed after enduring H₂O or/and SO₂. This novel strategy could open the door for selective catalytic reduction of NO_x with CH₄.

Keywords: CH(4)-SCR; In/H-Beta; Preparation condition; Reaction condition.

MeSH terms

Ammonia / chemistry*
Catalysis
Models, Chemical
Nitrogen Oxides / chemistry*
Oxidation-Reduction
Temperature

Substances

Nitrogen Oxides
Ammonia