Effect of synthesis solution pH of Co/γ-Al_2O_3 catalyst on its catalytic properties for methane conversion to syngas

作     者：Amir Mosayebi Reza Abedini Amir Mosayebi;Reza Abedini

作者机构：Department of Chemical EngineeringTafresh University Faculty of Chemical EngineeringBabol Noshirvani University of Technology 

出 版 物：《燃料化学学报》 (Journal of Fuel Chemistry and Technology)

年 卷 期：2018年第46卷第3期

页      面：311-318页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：部分氧化 Co/-Al ₂ O ₃ nanoparticles 选择 pH 价值 

摘      要：The cobalt nanoparticles over γ-Al_2O_3 support were prepared via chemical reduction of CoCl_2·6H_2O using NaBH_4 with various values of pH in the range of 11. 92-13. 80. Synthesized catalysts were studied through X-ray diffraction( XRD),N_2 adsorption/desorption( BET),H_2-temperature programmed reduction( H_2-TPR),H_2-chemisorption,O_2 pulse titration and temperature programmed oxidation( TPO) methods. Obtained results exhibited the synthesis solution pH showed a significant influence on the activity and selectivity in partial oxidation of methane reaction. The methane conversion,CO selectivity and H_2 yield were enhanced by increasing of the synthesis solution pH. Compared to other catalysts,the catalyst that synthesized at pH of 13.80,showed a superior ability in syngas production with a H_2/CO ratio of near 2 and also a proper stability against deactivation during the partial oxidation of methane.