Active carbon supported TiO₂-AuCl₃/AC catalyst with excellent stability for acetylene hydrochlorination reaction

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• 作者：Chaofeng Huang ; Mingyuan Zhu ; Lihua Kang ; Xiaoyan Li ; Bin Dai
• 关键词：Acetylene hydrochlorination reaction ; AuCl3 catalyst ; TiO2 ; Stability
• 刊名：Chemical Engineering Journal
• 出版年：15 April, 2014
• 年：2014
• 卷：242
• 期：Complete
• 页码：69-75
• 全文大小：1907 K

文摘

In this paper, TiO₂ is added to synthesize TiO₂-AuCl₃/AC (activated carbon) catalyst with active carbon as support, and catalytic performance of the obtained TiO₂-AuCl₃/AC catalyst is applied in acetylene hydrochlorination reaction. The addition of TiO₂ species significantly enhances the stability of AuCl₃/AC catalyst. Transmission electron microscope characterization displays the presence of anatase TiO₂ phase in TiO₂-AuCl₃/AC catalyst. X-ray diffraction and temperature programmed reduction analysis demonstrate that the addition of TiO₂ species partly inhibits the reduction of Au³⁺ to Au⁰ in acetylene hydrochlorination process. TiO₂ species in TiO₂-AuCl₃/AC catalyst strengthens the adsorption of hydrogen chloride reactant in acetylene hydrochlorination reaction, which is attributed to the strong interaction between Au³⁺ active site and TiO₂ species.