Hydrogenation of polystyrene over Ni-doped Pd/CNT catalyst
LIU Zhen-yu1, GUO Xin-rong2, LIU Ping2, SUN Zhong-hua2, WANG Xing2, HE Ming-yang2, QIAN Jun-feng2
1. The Research Institute, Sinopec Maoming Petrochemical Company, Maoming 525021, China; 2. Jiangsu Key Laboratory of Green Catalytic Materials and Technology, School of Petrochemical Technology, Changzhou University, Changzhou 213164, China
Abstract: A series of Ni-doped Pd/CNT catalysts (Ni-Pd/CNT) are prepared,and characterized by means of XRD,BET,TEM,H2-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.
刘振宇, 郭欣荣, 刘平, 孙中华, 王钘, 何明阳, 钱俊峰. Ni掺杂的Pd/CNT催化聚苯乙烯加氢反应研究[J]. 现代化工, 2022, 42(12): 148-153.
LIU Zhen-yu, GUO Xin-rong, LIU Ping, SUN Zhong-hua, WANG Xing, HE Ming-yang, QIAN Jun-feng. Hydrogenation of polystyrene over Ni-doped Pd/CNT catalyst. Modern Chemical Industry, 2022, 42(12): 148-153.
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