Citation: Jun Yang, Yupeng Chang, Weili Dai, Guangjun Wu, Naijia Guan, Landong Li. Bimetallic Cr-In/H-SSZ-13 for selective catalytic reduction of nitric oxide by methane[J]. Chinese Journal of Catalysis, ;2018, 39(5): 1004-1011. doi: 10.1016/S1872-2067(18)63054-2 shu

Bimetallic Cr-In/H-SSZ-13 for selective catalytic reduction of nitric oxide by methane

Jun Yang ^a, ,
Yupeng Chang ^a ,
Weili Dai ^a ,
Guangjun Wu ^a ,
Naijia Guan ^a,b ,
Landong Li ^a,b

a School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300071, China;
b Key Laboratory of Advanced Energy Materials Chemistry of the Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China

Received Date: 7 February 2018
Revised Date: 7 March 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21773127, 21722303, 21421001) and the 111 Project (B18030).

Bimetallic Cr-In/H-SSZ-13 zeolites were prepared by wet impregnation and investigated for selective catalytic reduction of nitric oxide by methane (CH₄-SCR). Reduction-oxidation treatments led to close contact and interaction between Cr and In species in these zeolites, as revealed by transmission electron microscopy and X-ray photoelectron spectroscopy. Compared to monometallic Cr/H-SSZ-13 and In/H-SSZ-13, the bimetallic catalyst system exhibited dramatically enhanced CH₄-SCR performance, i.e., NO conversion greater than 90% and N₂ selectivity greater than 99% at 550℃ in the presence of 6% H₂O under a high gas hourly space velocity of 75 000/h. The bimetallic Cr-In/H-SSZ-13 showed very good stability in CH₄-SCR with no significant activity loss for over 160 h. Catalytic data revealed that CH₄ and NO were activated on the In and Cr sites of Cr-In/H-SSZ-13, respectively, both in the presence of O₂ during CH₄-SCR.
- Selective catalytic reduction,
- Nitric oxide,
- Methane,
- Cr-In/H-SSZ-13,
- Bimetallic catalyst
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