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用脉冲催化色谱中毒法测定并研究了氢受丝光沸石酸中心及其与甲苯歧化反应的关系。这一快速、简便的方法可提供在反应条件和反应气氛下多种与固体酸值化剂表面酸中心性质有关的信息。在测定酸中心数的同时,可获得中毒过程中剩余酸中心数与反应动力学参数间的关系。试验表明同一系列合成丝光沸石制备和交换过程中,总SiO_2/Al_2O_3和钠被交换率与酸中心数有一定关系。中毒程度不同时测得之甲苯歧化反应视活化能、用不同毒物进行中毒试验和铰型丝光沸石分解所得氢型丝光沸石酸中心数与饺交换量等结果,可能有助于进一步探讨氢型丝光沸石的酸中心性质。
Pulsed catalytic chromatography poisoning was used to determine and study the relationship between the hydrogen-substituted mordenite acid center and its disproportionation reaction with toluene. This quick and easy method provides a wide range of information about the nature of the acid sites on the surface of solid acidifiers under reaction conditions and reaction atmosphere. In determining the number of acid centers, the relationship between the number of remaining acid sites and reaction kinetics parameters during the poisoning process can be obtained. Experiments show that the same series of synthetic mordenite preparation and exchange process, the total SiO 2 / Al 2 O 3 and sodium exchange rate and the number of acid centers have a certain relationship. Toluene disproportionation reaction with different degrees of poisoning as activation energy, poisoning test with different toxicants and the results obtained by decomposing hinge-type mordenite with the number of hydrogen-type mordenite acid centers and the amount of dumplings may be helpful to further study on hydrogen-type mercerized Acid center nature of zeolite.