Ni掺杂的Pd/CNT催化聚苯乙烯加氢反应研究  

Hydrogenation of polystyrene over Ni-doped Pd/CNT catalyst

作　　者：刘振宇 郭欣荣 刘平[2] 孙中华 王钘 何明阳[2] 钱俊峰[2] LIU Zhen-yu;GUO Xin-rong;LIU Ping;SUN Zhong-hua;WANG Xing;HE Ming-yang;QIAN Jun-feng(The Research Institute,Sinopec Maoming Petrochemical Company,Maoming 525021,China;Jiangsu Key Laboratory of Green Catalytic Materials and Technology,School of Petrochemical Technology,Changzhou University,Changzhou 213164,China)

机构地区：[1]中国石油化工股份有限公司茂名分公司研究院,广东茂名525021 [2]江苏省绿色催化材料与技术重点实验室,常州大学石油化工学院,江苏常州213164

出　　处：《现代化工》2022年第12期148-153,共6页Modern Chemical Industry

基　　金：中石化总部科技开发项目(421103-8)。

摘　　要：制备了一系列Ni掺杂的Pd/CNT催化剂(Ni-Pd/CNT),通过XRD、BET、TEM、H_(2)-TPR、XPS等手段对其进行表征,并考察了其在聚苯乙烯(PS)加氢中的催化性能。结果表明,Ni的加入提高了Pd的分散度,起到了协同催化的作用,大幅度提高了Pd/CNT的催化活性和链长保留率。Ni-Pd/CNT催化剂的最佳制备条件为:5%Pd、5%Ni、400℃焙烧4 h、350℃碳化2 h;Ni-Pd/CNT催化PS加氢的最佳反应条件为反应温度160℃、反应压力6 MPa、反应时间8 h、催化剂质量分数10%,此时,PS的转化率达98.6%,同时链长保留率达89.3%。Ni掺杂的Pd/CNT催化剂活性的提高缩短了反应时间,有效减少了分子链的断裂,且催化剂具有良好的稳定性。A series of Ni-doped Pd/CNT catalysts(Ni-Pd/CNT) are prepared, and characterized by means of XRD,BET,TEM,H_(2)-TPR and XPS.Their catalytic performances are evaluated through the hydrogenation of polystyrene.The results show that the addition of Ni improves the dispersion of Pd, plays a synergistic role in catalysis, and greatly improves the catalytic activity and chain length retention rate of Pd/CNT.The optimal preparation conditions for Ni-Pd/CNT catalyst are determined as follows: the contents of both Pd and Ni are 5%,the calcination has performed at 400℃ for 4 h, and the carbonization has performed at 350℃ for 2 h.The optimal reaction conditions for the hydrogenation of polystyrene over the prepared Ni-Pd/CNT catalyst are obtained as follows: the dosage of Ni-Pd/CNT catalyst is 10%,and the reaction has carried out at 160℃ and 6 MPa for 8 h.The conversion of polystyrene reaches 98.6%,and the chain length retention rate reaches 89.3% under the optimal reaction conditions.The promoting effect of Ni helps to shorten the reaction time, and effectively reduce the breakage of molecular chains.Ni-Pd/CNT catalyst also shows a good stability.

关 键 词：聚苯乙烯 催化加氢 PD Ni 碳纳米管 

分 类 号：TQ320.6[化学工程—合成树脂塑料工业]