Pd/SAPO-41 Bifunctional Catalysts with Enhanced Pd Dispersion Prepared by Ultrasonic-Assisted Impregnation: High Selectivity for n-Hexadecane Hydroisomerization
作者:Guozhi Jia、A. L. Maximov、Wei Wang、Xuefeng Bai、Xiaomeng Wei、Xiaofang Su、Tong Li、Chunmu Guo、Wei Wu
DOI:10.1134/s1070427220040047
日期:2020.4
AbstractThe preparation of bifunctional catalysts with high catalytic selectivity for the n-alkanes hydroisomerization still remains challenging for the production of bio-diesel. Herein, two series of Pd/SAPO-41 bifunctional catalysts are prepared by the ultrasonic-assisted impregnation (xPd/S41-U) with different treating time and conventional incipient wetness impregnation methods (0.30Pd/S41-I) on
摘要对正烷烃加氢异构化具有高催化选择性的双功能催化剂的制备对于生物柴油的生产仍然具有挑战性。在此,通过在不同的处理时间下用超声辅助浸渍(x Pd / S41-U)和在SAPO-上常规的初湿浸渍方法(0.30Pd / S41-I)制备了两种系列的Pd / SAPO-41双功能催化剂。分别为41个分子筛。通过XRD,SEM,ICP,N 2物理吸附,H 2化学吸附和Py-IR测量研究了合成的SAPO-41和制备的催化剂的理化性质。n的催化性能还研究了在所有催化剂上的十六烷加氢异构化。特征结果表明,与0.30Pd / S41-I催化剂相比,x Pd / S41-U催化剂显示出更强的布朗斯台德酸度。另外,x Pd / S41-U催化剂的Pd分散度几乎是0.30Pd / S41-I催化剂的Pd分散度的两倍,这导致更多的Pd团簇进入SAPO-41分子筛的微孔。此外,具有0.30 wt%Pd负载的0.30Pd