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沸石的热稳定性、酸性和催化性能与沸石的Si/Al比有很大的关系.用(NH_4)_2SiF_6对Y型沸石进行脱铝补硅,能改变沸石的Si/Al比,并且脱铝沸石中非骨架铝少,结晶度好,很适合用于研究其物化性质与催化性能随Si/Al比的变化. 样品的制备及结构参数测试参阅文献〔1〕.沸石的组分分析采用湿法化学分析法。晶格破坏温度由DTA法测定.将厚度为10mg/cm~2的片状沸石,于1.33×10~(-2)～
The thermal stability, acidity and catalytic performance of zeolites are greatly related to the Si / Al ratio of zeolites. The removal of aluminum from zeolite by (NH_4) _2SiF_6 can change the Si / Al ratio of zeolites, Zeolite non-framework aluminum less, good crystallinity, it is suitable for the study of its physicochemical properties and catalytic properties with the Si / Al ratio changes. Sample preparation and structural parameters of the test reference [1]. Zeolite composition analysis using wet Law and chemical analysis. The temperature of lattice destruction was determined by DTA method.The flaky zeolite with a thickness of 10mg / cm ~ 2 was sintered at 1.33 × 10 ~ (-2)