Metal-reinforced sulfonic-acid-modified zirconia for the removal of trace olefins from aromatics |
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| Authors: | Decun Kong Qian Peng Li Shi Xin Wang Xuan Meng Xiude Hu Naiwang Liu |
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| Institution: | 1. International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai, China;2. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, China |
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| Abstract: | Metal-reinforced sulfonic-acid-modified zirconia catalysts were successfully prepared and used to remove trace olefins from aromatics in a fixed-bed reactor. Catalysts were characterized by ICP-OES, N2 adsorption–desorption, X-ray diffraction, thermogravimetric analysis (TGA), and pyridine-FTIR spectroscopy. Different metals and calcination temperatures had great influence on the catalytic activity. Alumina-reinforced sulfated zirconia exhibited outstanding catalytic performance, stable regeneration activity, and giant surface area, and are promising in industrial catalysis. TGA showed that the decomposition of methyl could be attributed to Brønsted acid sites, and pyridine-FTIR spectroscopy proved the weak Brønsted sites on these synthesized metal-reinforced sulfated zirconia. Also, a relation between the reaction rate and weak Brønsted acid density is proposed. |
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| Keywords: | alkylation brønsted acid catalysis sulfated zirconia |
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