Palladium nanoparticles confined within ZSM-5 zeolite with enhanced stability for hydrogenation of p-nitrophenol to p-aminophenol》.pdf

Chemical Engineering Journal 283 (2016) 922–928 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage: www.else /locate/cej Palladium nanoparticles confined within ZSM-5 zeolite with enhanced stability for hydrogenation of p-nitrophenol to p-aminophenol Fei Wang, Jing Ren, Yunliang Cai, Long Sun, Chuanling Chen, Shuai Liang, Xingmao Jiang ⇑ Key Laboratory of Advanced Catalytic Material and Technology, Changzhou University, Changzhou 213164, PR China h i g h l i g h t s g r a p h i c a l a b s t r a c t Pd/ZSM-5-IS catalyst was synthesized using in situ method based on azeotropic distillation assisted fabrication. Pd/ZSM-5-IS catalyst exhibited higher catalytic activity in PNP hydrogenation than sample prepared by impregnation method. Pd/ZSM-5-IS catalyst showed enhanced stability and sulfur tolerance for the hydrogenation reactions. Pd nanoparticles were confined in channels of ZSM-5 by in situ method, which were prevented from loss and aggregation. a r t i c l e i n f o a b s t r a c t Article history: High dispersed palladium nanoparticles with the size of about 3.8 nm confined within ZSM-5 zeolite cat- Received 9 May 2015 alyst (Pd/ZSM-5-IS) was successfully synthesized by in situ synthesis method based on azeotropic distil- Received in revised form 8 August 2015 lation assisted fabrication. Liquid phase selective hydrogenation of p-nitrophenol (PNP) to p- Accepted 11 August 2015 aminopheno