Preparation of supported palladium catalyst from hydrotalcite-like compound for dicyclopentadiene resin hydrogenation

Hydrogenated dicyclopentadiene (DCPD) resin has been aroused widely concerned with developing of polymer material science. Due to its cross-linked molecular structure, large steric hindrance, and high activation energy of unsaturated bonds, the design of hydrogenation catalyst with fine structure, high activity, and excellent stability poses great challenges. Herein, basing on the concept of strong metal support interaction, supported palladium catalyst (Pd-MgAlO-HT) derived from thermal decomposition of hydrotalcite-like compound has been synthesized and the related chemical processing conditions have been optimized in a stainless autoclave at 150 270 degrees C, 1 - 9 MPa H-2 pressure and 0.5 - 6 h reaction time. The optimal product shows colorless transparent with a degree of hydrogenation over 96.5 %. As comparing with Pd/MgAlO-IM catalyst prepared by conventional impregnation method, the Pd-MgAlO-HT catalyst presents higher activity and stability for DCPD resin hydrogenation. Combined with the XRD, TEM, H-2-TPR analysis results, the enhanced catalytic performance of Pd-MgAlO-HT catalyst could ascribe to the small particle size, high dispersion of Pd particles and strong metal support interaction between Pd species and the support.