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用过渡元素的Ni,Cd,Co的硝骏盐(或醋酸盐)与ZSM—5混合焙烧,制得一系列不同比冽改性佛石催化剂样品。用x衍射、脉冲色谱法、高真空吸附,对所得各种样品进行研究,结果显示出:三种氧化物改性ZSM—5沸石催化剂中以CoO改性为好。而CoO改性又以7%CoO改性活性最高,选择性最好,对烷基化反应而言,影响对二甲苯选择性因素的是酸中心性质变化——弱酸中心增加、强酸中心减少以及孔道缩小共同控制对二甲苯的选择性。
With Ni, Cd, Co of the transition element Nitrate salt (or acetate) and ZSM-5 mixed roasting, a series of different than 冽 modified Buddha stone catalyst samples. The results of X-ray diffraction, pulse chromatography and high vacuum adsorption showed that the CoO modified by three oxide-modified ZSM-5 zeolites was better. The CoO modification with 7% CoO modification activity of the highest selectivity of the best alkylation reaction, the impact of the paraxylene selectivity factor is the nature of the changes in the center of the acid - weak acid center increased strong acid center decreased and Pore narrowing co-controls para-xylene selectivity.