Citation: Pan XIONG, Xiu-juan GAO, Wen-xiu WANG, Jun-feng ZHANG, Fa-en SONG, Qing-de ZHANG, Yi-zhuo HAN, Yi-sheng TAN. Effect of calcination temperature on the structure and performance of molybdenum-tin catalyst for DME oxidation[J]. Journal of Fuel Chemistry and Technology, ;2022, 50(1): 63-71. doi: 10.1016/S1872-5813(21)60120-2 shu

Effect of calcination temperature on the structure and performance of molybdenum-tin catalyst for DME oxidation

Pan XIONG ^{1, 2} ,
Xiu-juan GAO ^{1, 2} ,
Wen-xiu WANG ^{1, 2} ,
Jun-feng ZHANG ¹ ,
Fa-en SONG ¹ ,
Qing-de ZHANG ^{1, 3,,} ,
Yi-zhuo HAN ¹ ,
Yi-sheng TAN ¹

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 10049, China
3.
Dalian National Laboratory for Clean Energy, Dalian 116023, China

Corresponding author: Qing-de ZHANG, qdzhang@sxicc.ac.cn
Received Date: 26 April 2021
Revised Date: 23 May 2021

Figures(10)

The Mo1Sn2 catalysts with a Mo/Sn molar ratio of 1∶2 were prepared by the hydrothermal method, and their structure was regulated by changing the calcination temperature (400–700 ℃). The effect of the structural transformation of catalysts on the performance of selective oxidation of dimethyl ether (DME) to methyl formate (MF) was studied. It was found that the Mo1Sn2 catalyst calcined at 400 ℃ exhibited good performance in the oxidation of DME to methyl formate, showing a DME conversion of 9.2% and the MF selectivity of 86.9% at 110 ℃ and under atmospheric pressure without the generation of CO_x. The catalysts were systematically characterized by XRD, Raman, XPS, TPD, H₂-TPR and in-situ FT-IR. The results showed that the low-temperature calcination was favorable for the formation of MoO_x structure and more Mo⁵⁺ species on the catalyst surface, resulting in the enhanced acidity and redox ability of the catalyst, and the increase of medium to strong basic sites on the catalysts. In such case, the activity and methyl formate production of the catalyst were significantly promoted.
- dimethyl ether oxidation,
- Mo1Sn2 catalyst,
- calcination temperature,
- structure,
- methyl formate
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