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Partial oxidation of ethylbenzene by H2O2 on VOx/HZSM-22 catalyst

机译：通过H2O2在Vox / HzSM-22催化剂上偏氧化乙苯氧化

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摘要

A series of VOx/HZSM-22 catalysts for the partial oxidation of ethylbenzene was prepared with 0.09-2.86 wt% V loading by an incipient wetness impregnation method, and the catalysts were characterized by inductively coupled plasma-atomic emission spectrometer, X-ray diffraction, Fourier transform infrared spectroscopy, N-2 physisorption analysis, X-ray photoelectron spectroscopy, diffuse reflectance ultraviolet-visible spectroscopy, temperature-programmed calcination-mass spectroscopy, and temperature-programmed hydrogen reduction. The results showed that the chemical nature of vanadium species on HZSM-22 depended on V loading. The amount of vanadium species incorporated into the framework of HZSM-22 increased with V loading firstly and reached a relatively stable value of about 0.2 wt%. The decomposed ammonia might reduce V5+ to V4+ in the calcination process. Highly dispersed extra-framework vanadium species, especially surface extra-framework V4+, promised a good effect on the oxidation of ethylbenzene, under optimized conditions, a high yield of 17.5% with 72.5% selectivity to acetophenone was obtained.
机译：通过初期湿润浸渍法制备0.09-2.86wt％v加载，制备用于部分氧化乙苯的vox / hzsm-22催化剂，催化剂的表征通过电感耦合等离子体原子发射光谱仪，X射线衍射，傅里叶变换红外光谱，N-2物理吸附分析，X射线光电子体光谱，弥漫性反射率紫外 - 可见光谱，温度编程煅烧质谱和温度编程的氢气还原。结果表明，HZSM-22上的钒种的化学性质依赖于V负荷。掺入HZSM-22骨架中的钒种的量首先用V负荷增加，并达到约0.2wt％的相对稳定的值。分解氨可能在煅烧过程中将V5 +至V4 +降低。高度分散的框架钒种，特别是表面超框架V4 +，在优化条件下，对乙苯氧化的良好效果良好，得到了高产率为72.5％对苯乙酮的选择性。

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  • 来源
    《RSC Advances》 |2016年第60期|共9页
  • 作者

    Luo Li; Liu Huan; Li Guiying; Hu Changwei;

  • 作者单位

    Sichuan Univ Key Lab Green Chem &

    Technol Minist Educ Coll Chem Chengdu 610064 Sichuan Peoples R China;

    Sichuan Univ Key Lab Green Chem &

    Technol Minist Educ Coll Chem Chengdu 610064 Sichuan Peoples R China;

    Sichuan Univ Key Lab Green Chem &

    Technol Minist Educ Coll Chem Chengdu 610064 Sichuan Peoples R China;

    Sichuan Univ Key Lab Green Chem &

    Technol Minist Educ Coll Chem Chengdu 610064 Sichuan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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