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高等学校化学研究 ›› 2013, Vol. 29 ›› Issue (5): 941-946.doi: 10.1007/s40242-013-3170-z

• Articles • 上一篇    下一篇

Pretreatment of Cylindrical Coconut Activated Carbon and Performance as Catalyst Support

PAN Chong-gen, YE Lin-qin, WANG Ju-hua, BAO Li-xia, QUE Yong-sheng   

  1. National Center for International Research, Zhejiang University, Hangzhou 310058, P. R. China
  • 收稿日期:2013-04-12 修回日期:2013-05-13 出版日期:2013-10-01 发布日期:2013-09-17
  • 通讯作者: QUE Yong-sheng E-mail:conquer-me@163.com
  • 基金资助:

    Supported by the Fundamental Research Funds for the Central Universities, China(No.2013QN81004) and the Zhejiang Postdoctoral Science Foundation, China(No.Bsh1201017).

Pretreatment of Cylindrical Coconut Activated Carbon and Performance as Catalyst Support

PAN Chong-gen, YE Lin-qin, WANG Ju-hua, BAO Li-xia, QUE Yong-sheng   

  1. National Center for International Research, Zhejiang University, Hangzhou 310058, P. R. China
  • Received:2013-04-12 Revised:2013-05-13 Online:2013-10-01 Published:2013-09-17
  • Contact: QUE Yong-sheng E-mail:conquer-me@163.com
  • Supported by:

    Supported by the Fundamental Research Funds for the Central Universities, China(No.2013QN81004) and the Zhejiang Postdoctoral Science Foundation, China(No.Bsh1201017).

摘要:

Cylindrical coconut activated carbon(CCAC) support was graphitized at a high temperature(1900 ℃) in argon, then oxidized with an O2-N2-H2O mixture, and treated with nitric acid. Pretreatment of carbon support on its mechanical strength, physical structure, chemical composition and surface properties of cylindrical CCAC support was investigated by X-ray diffraction(XRD), surface area analysis, scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS), thermogravimetric-differential thermogravimetric(TG-DTG) analysis and temperature programmed desorption-mass spectrometry(TPD-MS), and the effect of CCAC support on the catalytic activities was also studied. The results show that the degree of graphitization, the purity(phosphorus, sulphur), pore structure(micropore, mesopore) and oxygen-containing functional groups(―COOH, ―OH, ―COOR) of carbon supports are obviously different, which have a great influence on the performance of Ru-based catalysts. After a series of pretreatments, the surface physical and chemical properties of the commercial CCAC are modified and improved, and the activity of as-prepared Ru/AC catalyst is increased significantly.

关键词: Cylindrical coconut activated carbon(CCAC), Thermal treatment, Mesopore, Catalyst

Abstract:

Cylindrical coconut activated carbon(CCAC) support was graphitized at a high temperature(1900 ℃) in argon, then oxidized with an O2-N2-H2O mixture, and treated with nitric acid. Pretreatment of carbon support on its mechanical strength, physical structure, chemical composition and surface properties of cylindrical CCAC support was investigated by X-ray diffraction(XRD), surface area analysis, scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS), thermogravimetric-differential thermogravimetric(TG-DTG) analysis and temperature programmed desorption-mass spectrometry(TPD-MS), and the effect of CCAC support on the catalytic activities was also studied. The results show that the degree of graphitization, the purity(phosphorus, sulphur), pore structure(micropore, mesopore) and oxygen-containing functional groups(―COOH, ―OH, ―COOR) of carbon supports are obviously different, which have a great influence on the performance of Ru-based catalysts. After a series of pretreatments, the surface physical and chemical properties of the commercial CCAC are modified and improved, and the activity of as-prepared Ru/AC catalyst is increased significantly.

Key words: Cylindrical coconut activated carbon(CCAC), Thermal treatment, Mesopore, Catalyst