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Abstract
Cylindrical coconut activated carbon(CCAC) support was graphitized at a high temperature(1900 °C) 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.
Keywords
Cylindrical coconut activated carbon(CCAC)
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Thermal treatment
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Mesopore
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Catalyst
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Chong-gen Pan, Lin-qin Ye, Ju-hua Wang, Li-xia Bao, Yong-sheng Que.
Pretreatment of cylindrical coconut activated carbon and performance as catalyst support.
Chemical Research in Chinese Universities, 2013, 29(5): 941-946 DOI:10.1007/s40242-013-3170-z
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