Effects of Acidic Properties of FSM-16 on the Catalytic Conversion of 1,2-Propandiol in the Presence and Absence of Hydrogen

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  • Sugiyama Shigeru
    Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima Department of Resource Circulation Engineering, Center for Frontier Research of Engineering, The University of Tokushima
  • Okada Yasuhiro
    Department of Chemical Science and Technology, The University of Tokushima
  • Yamane Yoshiki
    Department of Chemical Science and Technology, The University of Tokushima
  • Ehiro Takuya
    Department of Chemical Science and Technology, The University of Tokushima
  • Nakagawa Keizo
    Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima Department of Resource Circulation Engineering, Center for Frontier Research of Engineering, The University of Tokushima
  • Katoh Masahiro
    Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima
  • Katou Yuuki
    Otake Research Laboratories, Mitsubishi Rayon Co., Ltd.
  • Akihara Shuji
    Otake Research Laboratories, Mitsubishi Rayon Co., Ltd.
  • Yasukawa Toshiya
    Otake Research Laboratories, Mitsubishi Rayon Co., Ltd.
  • Ninomiya Wataru
    Otake Research Laboratories, Mitsubishi Rayon Co., Ltd.

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説明

We have earlier showed how the catalytic conversion of 1,2-propandiol to propanal using FSM-16 (#16 folded sheets of mesoporous materials) when molded by wet treatment proceeded more favorably than when using FSM-16 molded by pressurization, while no comparison using other typical acidic catalysts and no examination of the acidic properties of FSM-16 was carried out. In the present study, the conversion using FSM-16 molded by wet treatment and pressurization was compared with that obtained by using typical acidic catalysts such as SiW12O40/SiO2 and MCM-41 (#41 of Mobil Composition of Matter) together with amorphous SiO2. Among these catalysts, FSM-16 molded by wet treatment showed the most suitable catalytic activity. In order to examine the effect of the molding procedure for FSM-16 on its structural and acidic properties, FSM-16 molded by both methods was examined using NH3-TPD, in situ FT-IR using NH3 as a probe molecule, and Hammett indicators together with XRD and TEM. According to Zaitsev’s rule, the present conversion should afford acetone rather than propanal, which indicates that it would proceed via hydro cracking. Therefore, the conversion of 1,2-propandiol using FSM-16 was also examined in the presence and absence of hydrogen. Furthermore, hydration reactions of 1- and 2-propanol when using FMS-16 were examined. Based on the results obtained from this investigation, it was concluded that the conversion using a more acidic FSM-16 molded by wet treatment proceeded through dehydration rather than through hydro cracking.

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