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Mg和Co取代的MeAPO-31分子筛的微波加热合成及其在正癸烷加氢异构化反应中的催化性能 被引量:1

Microwave-Enhanced Synthesis of Mg-and Co-Substituted MeAPO-31 Molecular Sieves and Their Catalytic Performance in Hydroisomerization of n-Decane
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摘要 采用微波加热法合成了不同杂原子取代的MeAPO-31分子筛(Me为Mg或Co),并用浸渍法制备了担载型Pd/MeAPO-31双功能催化剂。通过XRD,N2物理吸附,UV-Vis DRS,SEM,NH3-TPD和Py-IR等方法对其结构和酸性进行了表征,并考察了Pd/MeAPO-31双功能催化剂在正癸烷加氢异构化反应中的催化性能。结果表明,采用微波加热法在170℃晶化2h,可合成出具有ATO拓扑结构的纯相MeAPO-31分子筛纳米晶。通过改变初始凝胶中杂原子的种类和组成,可调变MeAPO-31分子筛的酸性和催化反应性能,以Mg(NO3)2.6H2O为镁源所合成的MgAPO-31(N)分子筛样品的总酸量最大,中强酸位数目最多。Pd/MgAPO-31(N)对正癸烷加氢异构化反应具有更高的催化活性和异构化选择性,在340℃下,正癸烷转化率为85.5%时,异癸烷的选择性高达90.3%。 采用微波加热法合成了不同杂原子取代的MeAPO-31分子筛(Me为Mg或Co),并用浸渍法制备了担载型Pd/MeAPO-31双功能催化剂。通过XRD,N2物理吸附,UV-Vis DRS,SEM,NH3-TPD和Py-IR等方法对其结构和酸性进行了表征,并考察了Pd/MeAPO-31双功能催化剂在正癸烷加氢异构化反应中的催化性能。结果表明,采用微波加热法在170℃晶化2h,可合成出具有ATO拓扑结构的纯相MeAPO-31分子筛纳米晶。通过改变初始凝胶中杂原子的种类和组成,可调变MeAPO-31分子筛的酸性和催化反应性能,以Mg(NO3)2.6H2O为镁源所合成的MgAPO-31(N)分子筛样品的总酸量最大,中强酸位数目最多。Pd/MgAPO-31(N)对正癸烷加氢异构化反应具有更高的催化活性和异构化选择性,在340℃下,正癸烷转化率为85.5%时,异癸烷的选择性高达90.3%。
出处 《石油学报(石油加工)》 EI CAS CSCD 北大核心 2012年第S1期82-88,共7页 Acta Petrolei Sinica(Petroleum Processing Section)
基金 国家自然科学基金项目(21076065)资助
关键词 MeAPO-31分子筛 同晶取代 微波加热 正癸烷 加氢异构化 MeAPO-31 molecular sieve isomorphous substitution microware irradiation n-decane hydroisomerization
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