Cu-K-CoOx@Al_(2)O_(3)催化氧化氯化氢制氯气  

Catalytic oxidation of hydrogen chloride to chlorine over Cu-K-CoOx@Al_(2)O_(3)

作　　者：陈琪炯 郑伟中 孙伟振[1] 赵玲[1,2] Chen Qijiong;Zheng Weizhong;Sun Weizhen;Zhao Ling(State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;School of Chemical Engineering and Technology,XinJiang University,Urumqi Xinjiang 830046,China)

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237 [2]新疆大学化学化工学院,新疆乌鲁木齐830046

出　　处：《石油化工》2022年第7期743-749,共7页Petrochemical Technology

摘　　要：采用过量浸渍法制备了一系列Cu-K-CoO_(x)@Al_(2)O_(3)复合氧化物,利用TEM、XRD、N_(2)吸附-脱附等方法对制备的催化剂进行表征,考察了反应条件对催化剂催化氧化氯化氢性能的影响。表征结果显示,活性组分K_(2)O和CoO均匀分布在Al_(2)O_(3)载体表面,催化剂为典型的介孔结构,工业使用温度范围内(350~430℃)稳定性良好。实验结果表明,Co/Cu摩尔比的增加有利于提高催化剂的催化活性,常压下反应的最佳条件为:410℃,重时空速360 h^(-1),O_(2)/HCl进料摩尔比为1∶1,反应时间3 h,在此条件下,Cu/Co摩尔比为10∶5的催化剂活性最高,氯化氢转化率为75.2%。与传统的铜基催化剂相比,Cu-K-CoO_(x)@Al_(2)O_(3)催化剂具有较高的转化率。A series of Cu-K-CoO_(x)@Al_(2)O_(3) composite oxide catalysts were prepared by the excessive impregnation method,and the influencing factors on the catalytic performance of copper-based catalysts in the HCl oxidation process were explored.The structure and composition of the composite catalyst were analyzed by TEM,XRD and N_(2) adsorption-desorption.The characterization results showed that the active component K_(2)O and CoO distributed uniformly on Al_(2)O_(3) support.The obtained catalyst was typically mesoporous and able to be stable at the temperature range of 350-430℃.The performance test results indicated that the increase of Co/Cu molar ratio is beneficial for raising the catalytic activity of the catalyst.The optimal reaction conditions under atmospheric pressure are 410℃,WHSV 360 h^(-1),feed molar ratio of O_(2)/HCl 1∶1,and reaction time of 3 h.Under the optimal condition,the catalyst with the molar ratio of Cu/Co 10∶5 showed the highest catalytic activity that HCl conversion was 75.2%.Compared with the traditional copper based catalysts,the Cu-K-CoO_(x)@Al_(2)O_(3) performed better.

关 键 词：Cu-K-CoOx@Al_(2)O_(3)复合氧化物 氯化氢 氯气 催化 氧化 

分 类 号：TQ021.4[化学工程]