Citation: YANG Qi, GAO Xiu-juan, FENG Ru, LI Ming-jie, ZHANG Jun-feng, ZHANG Qing-de, HAN Yi-zhuo, TAN Yi-sheng. MoO₃-SnO₂ catalyst prepared by hydrothermal synthesis method for dimethyl ether catalytic oxidation[J]. Journal of Fuel Chemistry and Technology, ;2019, 47(8): 934-941. shu

MoO₃-SnO₂ catalyst prepared by hydrothermal synthesis method for dimethyl ether catalytic oxidation

YANG Qi ^1,2 ,
GAO Xiu-juan ^1,2 ,
FENG Ru ^1,2 ,
LI Ming-jie ^1,2 ,
ZHANG Jun-feng ¹ ,
ZHANG Qing-de ^1,, ,
HAN Yi-zhuo ¹ ,
TAN Yi-sheng 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 100049, China

Corresponding author: ZHANG Qing-de, qdzhang@sxicc.ac.cn
Received Date: 26 March 2019
Revised Date: 28 May 2019

Fund Project: Youth Innovation Promotion Association CAS 2014155CAS Interdisciplinary Innovation Team BK2018001the National Natural Science Foundation of China 21773283the National Natural Science Foundation of China 21373253The work was financially supported by the National Natural Science Foundation of China(21773283, 21373253), CAS Interdisciplinary Innovation Team(BK2018001), Youth Innovation Promotion Association CAS(2014155) and the Open Project Program of State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University(201624)the Open Project Program of State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University 201624

Figures(7)

MoO₃-SnO₂ composite metal oxide catalyst was synthesized by one-step hydrothermal synthesis method without precipitant. The effect of MoO_x dispersion state on the catalytic performance of MoO₃-SnO₂ catalysts with different Mo/Sn molar ratios was investigated for dimethyl ether (DME) low-temperature oxidation to methyl formate (MF). MF selectivity reaches 77.6% with DME conversation of 22.0% over Mo₁Sn₂ at 150 ℃. The physiochemical properties of these catalysts were characterized by TEM, XRD, Raman, FT-IR, NH₃-TPD and H₂-TPR. The results showed that the addition of SnO₂ into MoO₃ affected the crystal structure of catalysts, forming MoO_x species with different degree of dispersion on the surface of SnO₂. The special architecture of MoO_x-SnO₂ plays a major role in modifying the acidity and the oxidizability of MoO₃-SnO₂ catalysts, leading to the obvious differences on catalytic activity.
- hydrothermal synthesis,
- dimethyl ether,
- selective oxidation,
- methyl formate,
- MoO_x
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MoO₃-SnO₂ catalyst prepared by hydrothermal synthesis method for dimethyl ether catalytic oxidation