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In situ FTIR study of methanol oxidation over CuY catalyst

In situ FTIR study of methanol oxidation over CuY catalyst. Chen Pengzhen 12.12.14. CH 3 OH(25%). 2956 and 2844:anti-symmetric and symmetric C-H for methanol 1459: deformation of methyl groups 1360: OH deformation band for molecular methanol. CH 3 OH(25%)+O 2. 3578.

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In situ FTIR study of methanol oxidation over CuY catalyst

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  1. In situ FTIR study of methanol oxidation over CuYcatalyst Chen Pengzhen 12.12.14

  2. CH3OH(25%) 2956 and 2844:anti-symmetric and symmetric C-H for methanol 1459: deformation of methyl groups 1360: OH deformation band for molecular methanol

  3. CH3OH(25%)+O2 3578 以吸附甲醇后的谱图作为背景 O2：2.0mL/min 单独进样

  4. CH3OH(25%)+O2 2896: C-H vibration in HCHO 以吸附甲醇后的谱图作为背景 O2：2.0mL/min 单独进样

  5. O2:2.0 ml/min He:30ml/min O2:2.0 ml/min

  6. CH3OH(25%)+O2+CH3OH

  7. CH3OH(35%)

  8. CH3OH(35%)+O2 O2：2.0mL/min 单独进样

  9. CH3OH(35%)+O2+CH3OH

  10. CH3OH(25%)+O2 30℃下进行甲醇的吸附 O2：2.0mL/min 单独进样

  11. Effect of temperature 1630 1656

  12. CO adsorption on CuY(10) CuY(10) 25% CuY(10) 35% CuY(10) 25%

  13. Work plan 1、Adsorption of formaldehyde on CuY(10) catalyst， followed by addition of methanol to the in situ cell。 2、MS study of the oxidation of methanol over CuY(10) catalyst 。 3、The origin of oxygen atom in DMC，mainly about from methanol or oxygen。

  14. Jakob, P. (2010). Reactions of Methanol on Ru(0001).Journal of Phsical Chemical C,114: 2655-2663

  15. MingfeiZhou (2004). Matrix Isolation Infrared Spectroscopic and Density Functional Theoretical Studies of the Reactions of Scandium Atoms with Methanol. Journal of Phsical Chemical A 108: 5950-5955.

  16. As with the other methanol isotopologues, several of the CH318OH ν8CO-stretching subbands show evidence of perturbations due to intermode interactions, most notably with excited torsional levels of the ground state or with the ν7in-plane CH3-rocking mode . The perturbations can either extend over an entire substateor be strongly localized due to a sharp level-crossing resonance. An interesting aspect of this coupling is the effect of “isotopic tuning” since the CO-stretch is lowered significantly by isotopic substitution on either the C or the O atom whereas the ground state torsion and the CH3-rock are relatively unaffected. Thus, different substates come into resonance as the origin of the CO-stretch band shifts down from approximately 1034 cm-1 for the parent normal CH3OH to 1018 cm-1for 13CH3OH and then to 1007 cm-1for CH318OH. Lees R. M. (2009). Fourier transform spectroscopy of the CO-stretching band of O-18 methanol. Journal of Molecular Spectroscopy. 256(1): 91-98.

  17. MingfeiZhou (2003). Matrix Isolation FTIR Spectroscopic and Density Functional Theoretical Studies of the Reactions of Magnesium Atoms with Methanol. Journal of Phsical Chemical A 107: 11380-11385.

  18. Zhao, S. B. (1995). Fourier Transform Spectroscopy of CH318OH The In-plane CH3-Rocking Band. Journal of Molecular Spectroscopy. 172: 153-175.

  19. 1068 1124 1088 1104 1025 1061 1057 1029 1012 1042 985 1013 985 1013 Fig. 1 . IR spectrum of CH316OH(—) or CH318OH (····) absorbed : A) on ThO2 after a few minutes of evacuation at 200℃， B) on CeO2after a few minutes of evacuation at 100℃ J. Lamotte(1988). FTIR study of the structure and reactivity of methoxy species on ThO2 and CeO2. React. Kinet. Catal. Lett 36(1): 113-118.

  20. Thanks For Your Attention!

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