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采用浸渍法制备了系列不同Pd含量的催化剂,通过XRD、H_2-TPR、BET等分析表征技术和以油酸甲酯为模型化合物的加氢反应体系,考察了Pd含量对催化剂催化加氢脱氧性能和催化加氢饱和性能的影响。结果表明,适量的Pd有助于提高Pd在载体上的分散度,减小其与载体的相互作用强度,从而可提高催化剂的加氢脱氧性能和加氢饱和性能,也可使油酸甲脂的加氢脱氧方式越容易按加氢脱羧或脱羰的方式进行;2%Pd/γ-Al_2O_3催化剂的催化加氢脱氧转化率和加氢饱和转化率均为100%,且加氢脱氧方式完全按加氢脱羧或脱羰方式进行。
A series of catalysts with different Pd content were prepared by impregnation method. The catalytic hydrogenation and deoxygenation of Pd catalyst were investigated by XRD, H 2 -TPR, BET and other characterization techniques and methyl oleate as model compound hydrogenation reaction system And catalytic hydrogenation saturation performance. The results show that proper amount of Pd helps to improve the dispersion of Pd on the carrier and reduce the intensity of its interaction with the carrier so as to improve the hydrodeoxygenation performance and hydrogenation saturation performance of the catalyst, Hydrodeoxygenation is easier to be carried out by means of hydrodecarboxylation or decarbonylation. The catalytic hydrodeoxygenation conversion and hydrogenation saturation conversion of 2% Pd / γ-Al 2 O 3 catalyst are both 100%, and the hydrodeoxygenation is complete By hydrodecarboxylation or decarbonylation manner.