Synergistic catalytic performance of Ru Sn and Pd Ce composite catalysts for the hydrogenation of Terephthalic acid to 1,4-Cyclohexanedimethanol

1,4-cyclohexanedimethanol (CHDM) is used as a high-value polyester monomer. On the basis of the catalysts of RuSn and Pd, the compound catalysts of RuSn and PdCe are prepared by adding the additive Ce to the Pd-based catalyst. The results showed that the yield of CHDM increased by 13.4% after the addition of Ce, indicating that Ce is conducive to the activation of HH and CO thus promoting the hydrogenation of carboxyl groups. Furthermore, the addition of Ce effectively slows down the coverage of the compound on the active component Pd, prolonging the lifespan of the catalyst.