固定晶化条件和合成原料参数，在SiO₂-Al₂O₃-TBA⁺-H₂O体系中，分别以四丁基氢氧化铵为模板剂、硫酸铝为铝源、正硅酸乙酯为硅源，考察了原料硅铝摩尔比对合成ZSM-11分子筛理化性能的影响。结果表明，随着原料硅铝摩尔比的增大，I₅₀₁/I₂₀₀[（501）和（200）晶面衍射峰的强度]的比值增大。原料硅铝摩尔比影响ZSM-11分子筛的晶粒大小和晶体形状。原料硅铝摩尔比为200时，合成ZSM-11分子筛的比表面积（453.9）和孔容（0.163 5）最大，介孔表面积占总表面积的40%，该催化剂的甲醇转化率为99.8%，丙烯收率为47%，P/E比值为5.84。

Under fixed crystallization conditions and raw material parameters,the effect of SiO₂/Al₂O₃ ratio on the physicochemical properties of synthesized ZSM-11 molecular sieve and its catalytic performance are investigated in SiO₂-Al₂O₃-TBA⁺-H₂O system through using tetrabutylammonium hydroxide,aluminium sulfate and ethyl silicate as template agent,aluminum source and silica source,respectively.It is found that the ratio of the (501) and (200) crystal plane diffraction peak intensity I₅₀₁ to I₂₀₀ increases with the increase of Si/Al ratio.Moreover,the SiO₂/Al₂O₃ ratio affects the crystal size and morphology of the synthesized ZSM-11 molecular sieve.When the SiO₂/Al₂O₃ ratio equals to 200,the prepared ZSM-11 molecular sieve has the biggest specific surface and pore volume,453.9 and 0.163 5 respectively,and its mesoporous surface area accounts for 40% of its total surface area.When this molecular sieve serves the MTO process,the conversion rate of methanol can reach 99.8%,the yield of propylene can be 47% and the yield ratio between propylene and ethylene is 5.84.