| The effect of copper valence on catalytic combustion of styrene over the copper based catalysts in the absence and presence of water vapor☆ |
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| 作者姓名： | Hongyan Pan Zhiyan He Qian Lin Fei Liu Zhong Li |
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| 作者单位： | 1.School of Chemical Engineering, Guizhou University, Guiyang 550025, China;2.Key Laboratory of Guizhou Province for Green Chemical Industry and Clean Energy Technology, Guiyang 550025, China;3.Research Institute of Chemical Engineering, South China University of Technology, Guangzhou 510640, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China(21366008);the Foundation of Guizhou University((2010)040);the Science & Technology Foundation of Guizhou Province((2012)2152) |
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| 摘 要： | Catalysts Cu Ox/γ-Al_2O_3-IH and Cu Ox/γ-Al_2O_3-IM were prepared, characterized, and tested for styrene combustion in the absence and presence of water vapor. The effect of copper valence of the catalysts on the catalytic activity for styrene combustion was discussed using the theory of hard soft acids and bases(HSAB).The results showed that the existence of water vapor in feed stream inhibited the catalytic activity for styrene combustion due to the competition adsorption of water molecule. HSAB theory confirmed that the local soft acidity of the catalyst Cu Ox/γ-Al_2O_3-IH was much stronger than that of the catalyst Cu Ox/γ-Al_2O_3-IM because of the higher content of soft acid Cu+on its surface, which increased the adsorption ability toward soft base of styrene and reduced the adsorption toward hard base of water vapor, and thus increased the catalytic activity for styrene combustion and weakened the negative influence of water vapor.
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| 关 键 词： | Catalyst combustion Styrene Copper based catalysts Water inhibition Theory of hard soft acids and bases |
| 收稿时间： | 2015-03-25 |
The effect of copper valence on catalytic combustion of styrene over the copper based catalysts in the absence and presence of water vapor |
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| Hongyan Pan,Zhiyan He,Qian Lin,Fei Liu,Zhong Li.The effect of copper valence on catalytic combustion of styrene over the copper based catalysts in the absence and presence of water vapor[J].Chinese Journal of Chemical Engineering,2016,24(4):468-474. |
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| Authors: | Hongyan Pan Zhiyan He Qian Lin Fei Liu Zhong Li |
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| Affiliation: | 1.School of Chemical Engineering, Guizhou University, Guiyang 550025, China;2.Key Laboratory of Guizhou Province for Green Chemical Industry and Clean Energy Technology, Guiyang 550025, China;3.Research Institute of Chemical Engineering, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | Catalysts CuOx/γ-Al2O3-IH and CuOx/γ-Al2O3-IM were prepared, characterized, and tested for styrene combustion in the absence and presence of water vapor. The effect of copper valence of the catalysts on the catalytic activity for styrene combustion was discussed using the theory of hard soft acids and bases (HSAB). The results showed that the existence of water vapor in feed stream inhibited the catalytic activity for styrene combustion due to the competition adsorption of water molecule. HSAB theory confirmed that the local soft acidity of the catalyst CuOx/γ-Al2O3-IH was much stronger than that of the catalyst CuOx/γ-Al2O3-IM because of the higher content of soft acid Cu+on its surface, which increased the adsorption ability toward soft base of styrene and reduced the adsorption toward hard base of water vapor, and thus increased the catalytic activity for styrene combustion and weakened the negative influence of water vapor. |
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| Keywords: | Catalyst combustion Styrene Copper based catalysts Water inhibition Theory of hard soft acids and bases |
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