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以吡啶,2、6—二甲基吡啶、喹林三种吸附碱为毒剂,以甲苯歧化反应为指示反应,用剂量中毒脉冲色谱技术测定了不同活化温度、相同反应条件下 HY 沸石的表面酸中心数.从中毒曲线的斜率变化看出:催化剂表面存在着两种催化活性不同的酸中心.实验结果表明,不同活化温度的 HY 上甲苯歧化活性与酸中心数有对应关系,它们随活化温度的变化趋势颇为相似.毒剂分子位阻大者所测活性中心数稍偏低.
Using pyridine, 2,6-lutidine and quinoline as adsorbents, toluene disproportionation reaction was taken as an indicator reaction. The surface acidity of HY zeolite with different activation temperature and same reaction conditions The number of centers.From the change of the slope of the poisoning curve, it can be seen that there are two kinds of acid sites with different catalytic activities on the catalyst surface.The experimental results show that the activity of toluene disproportionation on HY with different activation temperature has a corresponding relationship with the number of acid sites, The trend is quite similar.