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Catalytic activity and characterization of V2O5/γ-Al2O3 for ammoxidation of m-xylene system

机译:V2O5 /γ-Al2O3对间二甲苯体系氨氧化的催化活性和表征

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摘要

An ammoxidation of m-xylene was evaluated in a fixed-bed reactor using V2O5 on various oxides. Catalysts were prepared by wet impregnation method. At first, the loading of V2O5 was varied from 5 wt% to 20 wt% on γ-Al2O3 support to estimate the most effective amount of V2O5. Second, the effect of catalyst supports was examined at 10 wt% loading of V2O5. V2O5/TiO2 and V2O5/SiO2 catalysts were employed to compare the ammoxidation reaction with V2O5/γ-Al2O3. Most catalytic activity was observed when γ-Al2O3 was used as a support. Careful characterization was followed by physicochemical techniques, such as BET measurement, X-ray diffraction (XRD), Raman spectroscopy and temperature-programmed reduction (TPR). The results provided the clue that monolayer V2O5 was favorably dispersed on the surface of γ-Al2O3 up to 10 wt%, which led to the highest yield of isophthalonitrile (IPN).
机译:在固定床反应器中使用V2O5在各种氧化物上评估间二甲苯的氨氧化反应。催化剂采用湿法浸渍法制备。首先,在γ-Al2O3载体上,V2O5的负载量从5 wt%变化到20 wt%,以估算最有效的V2O5量。其次,在10重量%的V 2 O 5负载下检查了催化剂载体的作用。用V2O5 / TiO2和V2O5 / SiO2催化剂比较了V2O5 /γ-Al2O3的氨氧化反应。当使用γ-Al2O3作为载体时,观察到最大的催化活性。通过物理化学技术(例如BET测量,X射线衍射(XRD),拉曼光谱法和程序升温还原(TPR))仔细表征。结果提供了线索,表明单层V2O5可以很好地分散在γ-Al2O3的表面,含量高达10 wt%,这导致了间苯二甲腈(IPN)的最高收率。

著录项

  • 来源
    《Korean Journal of Chemical Engineering》 |2013年第8期|1566-1570|共5页
  • 作者单位

    Department of Chemical and Biomolecular Engineering Yonsei University">(182);

    Department of Chemical and Biomolecular Engineering Yonsei University">(182);

    Department of Chemical and Biomolecular Engineering Yonsei University">(182);

    Clean Energy Research Center Korea Institute of Science and Technology">(282);

    Department of Chemical and Environmental Technology Inha Technical College">(382);

    Department of Chemical and Biomolecular Engineering Yonsei University">(182);

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-18 00:01:28

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