Abstract：Cu-Pd/AC and K-Pd/AC catalysts were prepared by equivalent volume impregnation method. The effects of the addition of Cu and K promoters on the reaction performance of chlorotrifluoroethylene hydrodechlorination to trifluoroethylene were investigated. And the catalysts were characterized by N2-physical adsorption, X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and H2 temperature programmed reduction (H2-TPR). The results showed that the addition of Cu promoter, which formed Pd-Cu alloy inhibited the hydrogenation performance of the catalyst and reduced the reactivity of the catalyst. The addition of promoter K changed the electronic structure of Pd, enhanced the electron density of Pd and the ability of Pd to activate H, thereby improved the activity of the catalyst. The catalyst had a better activity after being added 3%(mass fraction) of K promoter. The conversion of chlorotrifluoroethylene could reach about 90% and the selectivity of trifluoroethylene could reach about 85% at the reaction temperature of 250 ℃.
Zhao Chongyang,Xiang Meng,Zhang Qing et al. Effects of Promoters on Performance of Pd/AC Catalysts in Hydrodechlorination of Chlorotrifluoroethylene[J]. 化学反应工程与工艺, 2017, 33(2): 144-150.
