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氩吸附法研究多级孔分子筛的孔结构

, PP. 379-384

Keywords: 氩吸附,多级孔分子筛,孔结构,介孔

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Abstract:

?采用不同方法分别制备了双介孔分子筛、介微孔分子筛及介孔沸石材料,利用氩吸附法并结合xrd技术表征了多级孔分子筛的孔结构。探讨了适用于多级孔分子筛的孔径分布计算方法,揭示了不同类型吸附等温线与孔径分布、孔型及孔容等之间的关系。研究表明,对于多级孔分子筛、微孔和介孔的孔径分布分别用sf法和bjh法计算较适宜,全孔分析可用nldft法计算。通过对ts-1介孔沸石的孔结构分析发现,tpaoh在改性制备介孔ts-1的过程中起到了生成介孔及促进二次晶化的双重作用。

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