| 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： | 1 November 2017 |
Effect of synthesis solution pH of Co/γ-Al2O3 catalyst on its catalytic properties for methane conversion to syngas |
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| Effect of synthesis solution pH of Co/&gamma,-AlO catalyst on its catalytic properties for methane conversion to syngas.Effect of synthesis solution pH of Co/γ-Al2O3 catalyst on its catalytic properties for methane conversion to syngas[J].Journal of Fuel Chemistry and Technology,2018,46(3):311-318. |
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| Authors: | Amir Mosayebi Reza Abedini |
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| Institution: | 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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| Abstract: | The cobalt nanoparticles over γ-Al2O3 support were prepared via chemical reduction of CoCl2·6H2O using NaBH4 with various values of pH in the range of 11.92–13.80. Synthesized catalysts were studied through X-ray diffraction (XRD), N2 adsorption/desorption (BET), H2-temperature programmed reduction (H2-TPR), H2-chemisorption, O2 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 H2 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 H2/CO ratio of near 2 and also a proper stability against deactivation during the partial oxidation of methane. |
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| Keywords: | partial oxidation nanoparticles selectivity pH value |
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