The Preparation of Nanosized Pd/ZSM-23 Bifunctional Catalysts for n-Hexadecane Hydroisomerization by Employing PHMB as the Growth Modifi er

作     者：Jiazheng Sun Shuxiang Xiong Qiong Wu Wei Wang Wei Wu Jiazheng Sun;Shuxiang Xiong;Qiong Wu;Wei Wang;Wei Wu

作者机构：National Center for International Research on Catalytic TechnologyKey Laboratory of Functional Inorganic Materials Chemistry(Ministry of Education)Heilongjiang UniversityHarbin 150080China 

出 版 物：《Transactions of Tianjin University》 (天津大学学报（英文版）)

年 卷 期：2023年第29卷第6期

页      面：482-491页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：funded by the National Key Research and Development Project,Intergovernmental International Science and Technology Innovation Cooperation Key Project(No.2018YFE0108800) National Natural Science Foundation of China(No.22278115) Heilongjiang Province Natural Science Foundation(No.YQ2021B010) 

主　　题：n-Hexadecane hydroisomerization Nanosized ZSM-23 zeolite PHMB Bifunctional catalyst 

摘      要：The development of highly effective metal-zeolite bifunctional catalysts for the hydroisomerization of n-alkanes is a paramount strategy to produce second-generation biofuels with high *** this study,polyhexamethylene biguanide hydrochloride(PHMB)is precisely added to the initial gel to synthesize nanosized ZSM-23 zeolites(Z23-x PH).Due to orientation adsorption and steric hindrance effects of PHMB,each sample of Z23-x PH demonstrates enhanced mesoporosity in comparison with the conventional Z23-C ***,the Bronsted acid density of the Z23-x PH samples is also signifi cantly reduced due to a reduction in the distribution of framework Al at T2-T5 *** corresponding Pd/23-C and Pd/Z23-x PH bifunctional catalysts with 0.5 wt%Pd loading for n-hexadecane hydroisomerization are prepared by incorporating ZSM-23 zeolites as acid *** to the catalytic test results,the suitable addition of PHMB can effectively promote the iso-hexadecane *** Pd/Z23-2PH catalyst with an n_(PHMB)/n(_Si)molar ratio of 0.002 demonstrates the highest maximum iso-hexadecane yield of 74.1%at an n-hexadecane conversion of 88.3%.Therefore,the employment of PHMB has provided a simple route for the development of highly effective Pd/ZSM-23 catalysts for n-alkane hydroisomerization.