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用流动TPD和TPR方法以及红外光谱研究了二甲苯异构化催化剂的酸性质及其表面反应,得到了NH_3在不同的二甲苯异构化催化剂上的程脱谱,并计算了它们的酸中心数及在两种不同强度的酸中心上NH_3的脱附活化能。还用红外光谱测定了具有不同催化活性的二甲苯异构化催化剂上表面酸的类型,并研究了不同的二甲苯异构化催化剂上的表面反应,得到了催化活性、选择性与酸性质相关联的信息。
The acidity and surface reaction of xylene isomerization catalyst were studied by flow TPD and TPR methods and infrared spectroscopy. The stripping spectrum of NH_3 on different xylene isomerization catalysts was obtained and their acid sites were calculated And the activation energy of NH3 desorption on acid sites of two different intensities. The types of surface acids on xylene isomerization catalysts with different catalytic activities were also determined by infrared spectroscopy. The surface reactions on different xylene isomerization catalysts were investigated, and the catalytic activity, selectivity and acid property were obtained Link information.