节点文献

Al₂O₃负载Pd-Cu催化剂催化1,2-二氯乙烷加氢脱氯性能

Catalytic hydrodechlorination of 1,2-dichloroehtane over Pd-Cu/γ-Al₂O₃ catalysts

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 WANG Zhiqin1 WAN Haiqin1 LI Liyuan1 YU Qiang2 LIU Lianjun2 DONG Lin2 ZHENG Shourong1(1.State Key Laboratory of Pollution Control and Resource Reuse,School of Environment,Nanjing University, Nanjing,210093,China;2.Key Laboratory of Mesoscopic Chemistry of MOE,School of Chemistry and Chemical Engineering, Nanjing University,Nanjing,210093,China)

【机构】污染控制与资源化研究国家重点实验室南京大学环境学院；介观化学教育部重点实验室南京大学化学化工学院；

【摘要】采用共浸渍法制备了一系列Al2O3负载金属Pd、Cu催化剂.通过元素分析(ICP)、氮气吸脱附(BET)、X射线粉末衍射(XRD)、透射电镜(TEM)等技术对催化剂进行了表征,并以1,2-二氯乙烷气相加氢脱氯为探针反应,考察了Pd-Cu/Al2O3催化剂的钯铜比、反应温度、反应时间等因素对催化活性以及反应产物乙烯选择性的影响.结果发现,提高Cu负载量可在催化剂中形成Pd-Cu合金,并促进催化剂对乙烯的选择性.此外,当温度为250℃,Pd、Cu负载量分别为0.78%和1.9%时的Pd-Cu/Al2O3催化剂对1,2-二氯乙烷的催化加氢脱氯效果最佳,最终产物乙烯的选择性可达到80%以上.更多还原

【Abstract】 Pd-Cu/γ-Al2O3 catalysts with various metal loadings were prepared by the co-impregnation method,and were characterized by elemental analysis,X-ray powder diffraction,N2 adsorption and transmission electron microscopy.The catalysts were used for the gas phase catalytic hydrodechlorination of 1,2-dichloroehtane.The effects of Pd/Cu ratio,reaction temperature and reaction time on 1,2-dichloroehtane conversion and ethylene selectivity were tested.The results indicate that increasing Cu loading lead to the formation of palladium-copper alloy and enhanced ethylene selectivity.Furthermore,at 250 ℃,the bimetallic catalyst with 0.78% Pd and 1.9% Cu exhibited optimum catalytic behavior,with an ethylene selectivity higher than 80%.更多还原