| Effect of synthesis solution pH of Co/γ-Al_2O_3 catalyst on its catalytic properties for methane conversion to syngas |
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| 作者姓名： | Effect of synthesis solution pH of Co/&gamma -AlO catalyst on its catalytic properties for methane conversion to syngas |
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| 作者单位： | 1. Department of Chemical Engineering, Tafresh University, Tafresh 39518 79611, Iran;2. Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol 47148 71167, Iran |
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| 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.
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| 收稿时间： | 2017-11-01 |
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