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以水蒸汽活化的两种活性炭为载体,采用等体积浸渍法制备了一系列Bi/AC催化剂,考察了其对乙炔氢氯化反应的催化性能。分别通过氮气吸附脱附实验(BET)、扫描电镜(SEM)、傅立叶变换红外光谱(FTIR)、透射电镜(TEM)、X射线粉末衍射(XRD)、X射线光电子能谱(XPS)和热重分析(TGA)对活性炭和催化剂进行表征。结果表明,水蒸汽活化重整了活性炭的孔径和孔道,尤其是介孔材质活性炭,增加了其比表面积,形成了新的微孔结构;积碳是Bi/AC催化剂失活的主要原因,水蒸汽活化抑制了积碳,并增加了BiOCl的结晶度和分散性,提高了对乙炔氢氯化反应的催化性能。
A series of Bi / AC catalysts were prepared by the same volume impregnation method using two kinds of activated carbon activated by water vapor as the carrier. The catalytic activity of the two catalysts on the hydrochlorination of acetylene was investigated. The samples were characterized by BET, SEM, FTIR, TEM, XRD and XPS, respectively. Analysis (TGA) Characterization of Activated Carbons and Catalysts. The results show that steam activation and reorganization of the pores and pores of activated carbon, especially mesoporous activated carbon, increase its specific surface area and form new microporous structure. Carbon deposition is the main reason for Bi / AC catalyst deactivation. Water Steam activation inhibits carbon deposition, and increases the crystallinity and dispersion of BiOCl, improving the catalytic performance of acetylene hydrochlorination.