SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (6): 1603-1611.DOI: 10.1016/j.cjche.2020.03.009

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

Effects of iron precursors on the structure and catalytic performance of iron molybdate prepared by mechanochemical route for methanol to formaldehyde

Lingtao Kong1,3, Shengtao Xu1, Xue Liu1, Chaofan Liu1, Dandan Zhang1, Ling Zhao2   

  1. 1 Key Laboratory of Coal Clean Conversion & Chemical Engineering Process, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China;
    2 Key Laboratory of Oil and Gas Fine Chemicals of Education, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China
  • Received:2019-09-01 Revised:2020-02-11 Online:2020-07-29 Published:2020-06-28
  • Contact: Lingtao Kong, Ling Zhao
  • Supported by:
    This work is supported by the Chang Jiang Scholars Programme of China, the Key research and development project of Xinjiang Uygur Autonomous Region (2017B02012), the Natural Science Foundation of Xinjiang University (BS62331), the Xinjiang Uygur Autonomous Region 100 Young Doctors Introduction Program. We also thank Xinjiang University Institute of Experimental Center for material characterization and analysis.

Effects of iron precursors on the structure and catalytic performance of iron molybdate prepared by mechanochemical route for methanol to formaldehyde

Lingtao Kong1,3, Shengtao Xu1, Xue Liu1, Chaofan Liu1, Dandan Zhang1, Ling Zhao2   

  1. 1 Key Laboratory of Coal Clean Conversion & Chemical Engineering Process, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China;
    2 Key Laboratory of Oil and Gas Fine Chemicals of Education, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China
  • 通讯作者: Lingtao Kong, Ling Zhao
  • 基金资助:
    This work is supported by the Chang Jiang Scholars Programme of China, the Key research and development project of Xinjiang Uygur Autonomous Region (2017B02012), the Natural Science Foundation of Xinjiang University (BS62331), the Xinjiang Uygur Autonomous Region 100 Young Doctors Introduction Program. We also thank Xinjiang University Institute of Experimental Center for material characterization and analysis.

Abstract: Mechanochemical synthesis has been applied for many novel material preparations and gained more and more attention due to green and high-efficiency recently. In order to explore the influences of iron precursors on structure and performance of iron molybdate catalyst prepared by mechanochemical route, three typical and cheap iron precursors have been used in preparation of iron molybdate catalyst. Many characterization methods have been employed to obtain the physical and chemical properties of iron molybdate catalyst. Results indicate that iron precursors have the significant impact on the phase composition, crystal morphology and catalytic performance in the conversion of methanol to formaldehyde. It is hard to regulate the phase composition by changing Mo/Fe mole ratios for Fe2(SO4)3 as iron precursor. In addition, as for Fe2(SO4)3, the formaldehyde yield is lower than that from iron molybdate catalyst prepared with Fe(NO3)3·9H2O due to the reduction in Fe2(MoO4)3 phase as active phase. Based on mechanochemical and coprecipitation method, the solvent water could be a key factor for the formation of MoO3 and Fe2(MoO4) for FeCl3·6H2O and Fe2(SO4)3 as precursors. Iron molybdate catalyst prepared with Fe(NO3)3·9H2O by mechanochemical route, shows the best methanol conversion and formaldehyde yield in this reaction.

Key words: Iron precursors, Mechanochemical route, Iron molybdate catalyst, Methanol oxidation

摘要: Mechanochemical synthesis has been applied for many novel material preparations and gained more and more attention due to green and high-efficiency recently. In order to explore the influences of iron precursors on structure and performance of iron molybdate catalyst prepared by mechanochemical route, three typical and cheap iron precursors have been used in preparation of iron molybdate catalyst. Many characterization methods have been employed to obtain the physical and chemical properties of iron molybdate catalyst. Results indicate that iron precursors have the significant impact on the phase composition, crystal morphology and catalytic performance in the conversion of methanol to formaldehyde. It is hard to regulate the phase composition by changing Mo/Fe mole ratios for Fe2(SO4)3 as iron precursor. In addition, as for Fe2(SO4)3, the formaldehyde yield is lower than that from iron molybdate catalyst prepared with Fe(NO3)3·9H2O due to the reduction in Fe2(MoO4)3 phase as active phase. Based on mechanochemical and coprecipitation method, the solvent water could be a key factor for the formation of MoO3 and Fe2(MoO4) for FeCl3·6H2O and Fe2(SO4)3 as precursors. Iron molybdate catalyst prepared with Fe(NO3)3·9H2O by mechanochemical route, shows the best methanol conversion and formaldehyde yield in this reaction.

关键词: Iron precursors, Mechanochemical route, Iron molybdate catalyst, Methanol oxidation