Preparation and Performance of Bifunctional Resin-Supported Palladium Catalyst in Hydro-Polymerization of C4 Olefins

Based on the reaction process for C, olefins polymerization, a new kind of bifunctional acid resin (KC110, Amberlyst35) supported palladium catalyst was designed and prepared, which can simultaneously catalyze the selective hydrogenation of 1, 3-butadiene by one-step reaction and the polymerization of isobutene. The properties of the bifunctional catalyst were respectively characterized by electron probe microanalysis (EPMA), N2 physisorption-desorption (BET), transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS). Moreover, the performance of the bifunctional catalyst in the hydro-polymerization of C, olefins was also investigated. The results show that the palladium nanoparticles loaded on 0. 10%Pd/KC110 bifunctional catalyst with an average particle diameter of 3-10 nm were mostly distributed on the macroporous surface of resin. The acidic property and the pore structure of resin were well preserved. The hydro-polymerization of C4 olefins was performed at the reaction temperature of 25 °C, the reaction pressure of 1. 4-1. 6 MPa, the mass hourly space velocity of 2. 7 h1, the molar ratio of hydrogen to 1, 3-butadiene of 1.5, as a result of which 1, 3-butadiene can be completely removed; the isobutene conversion rate is above 81. 5 %, and the selectivity of C8 in polymerization products is about 75. 1 %. © 2024 Editorial Office of Acta Petrolei Sinica. All rights reserved.