在蒸气相中合成中孔分子筛MCM-41及其孔结构参数的表征

SYNTHESIS MESOPOROUS MOLECULAR SIEVE MCM 41 IN VAPOUR PHASE AND THEIR POROUS STRUCTURE PARAMETERS

在水蒸气中，由含表面活性剂十六烷基三甲基溴化铵（ＣＴＡＢ）的无定形凝胶合成出Ｓｉ－ＭＣＭ－４１和Ａｌ－Ｓｉ－ＭＣＭ－４１分子筛纯相，研究了它们的合成条件。在较低的表面活性剂ＣＴＡＢ用量下（ＣＴＡＢ／Ｓｉ＝０．０２５），亦可合成出Ａｌ－Ｓｉ－ＭＣＭ－４１分子筛。以Ｎ２吸附等温线结果，计算出它们的比表面积，孔体积和孔径分布等孔结构参数。

In water steam,molecular sieves Si MCM 41 and Al Si MCM 41 have beensynthesized from amorphous gels containing cetyltrimethylammonium bromite(CTAB) Their crystalline conditions have been studied The molecular sieve Al Si MCM 41 wasalso prepared using small amount of surfant CTAB(CTAB/Si=0 025) From N 2adsorption isotherms,porous structure parameters,such as surface area,pore volume and pore distribution,have been calculated The surface areas are 1026 m 2 g -1 (Si MCM 41)and 1081 m 2 g -1 (Al Si MCM 41) The average pore diameters are 3 39 nm(Si MCM 41)and 2 62 nm(Al Si MCM 41)