以KH550和硅溶胶为硅源,用水热法合成了中孔SAPO-34分子筛,并采用XRD,氮吸附,SEM等分析方法对样品进行了分析和表征.结果表明:不同硅源配比和晶化时间对合成产物的结构和比表面有很大影响,所合成样品的总比表面积达到672m2/g,中孔SAPO-34的外比表面积可调变,在硅源配比n(KH550)∶n (Ludox) =0.6∶0.4,晶化时间为10天,总投料比为n(Al2O3)∶n(P2O5)∶n(Si)∶n(TEAOH)∶n(H2O)=1∶0.9∶0.5∶2∶60时,合成的中孔SAPO-34的外比表面积可达76m2/g.
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