Pretreatment of Cylindrical Coconut Activated Carbon and Performance as Catalyst Support

• Published in: Chemical research in Chinese universities Vol. 29; no. 5; pp. 941 - 946
• Main Authors: Pan, Chong-gen, Ye, Lin-qin, Wang, Ju-hua, Bao, Li-xia, Que, Yong-sheng
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2013; National Center for International Research, Zhejiang University, Hangzhou 310058, P.R.China
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Inorganic Chemistry; Organic Chemistry; Physical Chemistry; 催化剂载体; 圆柱形; 性能; 扫描电子显微镜; 椰子; 活性炭; 石墨化程度; 预处理; Mesopore; Catalyst; Cylindrical coconut activated carbon(CCAC); Thermal treatment
• ISSN: 1005-9040; 2210-3171
• DOI: 10.1007/s40242-013-3170-z

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 dis- persive 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 struc- ture（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 pre- treatments, 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.