Hierarchical SAPO-11 Synthesis by Carbon Nanoparticles Templating Method and its Application on n-Dodecane Hydroisomerization
Hierarchical SAPO-11 Synthesis by Carbon Nanoparticles Templating Method and its Application on n-Dodecane Hydroisomerization
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DOI：
10.4028/www.scientific.net/amr.912-914.168
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发表时间：
2014-04
期刊：
影响因子：
--
通讯作者：
Zhen Liu;Zhi Ma;Zifeng Yan
中科院分区：
文献类型：
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作者：
Zhen Liu;Zhi Ma;Zifeng Yan
在碳纳米粒子存在下，水热合成了多级结构的SAPO-11分子筛。X射线衍射（XRD）和N2吸附-脱附分析表明，纳米碳颗粒制备的样品具有以30 nm为中心的介孔结构。通过扫描电镜（SEM）和透射电镜（TEM）对产物进行了表征，结果表明，碳模板烧除后，晶体表面变得粗糙，仍保留中孔结构，中孔体积为0.339 cm 3/g。对于正十二烷加氢异构化反应，分级结构SAPO-11催化剂表现出比传统SAPO-11更高的异构体和单支化产物选择性，这将有利于正构烷烃的改质。
Hierarchical SAPO-11 moelecular sieves were hydrothermally synthesized in the presence of carbon nanoparticles. X-ray diffraction (XRD) and N2 adsorption-desorption analysis were conducted, which showed that samples prepared with carbon nanoparticles exhibited AEL structure with mesopores centering at 30nm. The product was also characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), which showed that the crystal surface became rough and left the mesopore structure with mesopore volume of 0.339 cm3/g after carbon template being burned off. For the hydroisomerization reaction of n-dodecane, the hierarchical SAPO-11 catalyst showed higher isomer and monobranched product selectivity than the traditional SAPO-11, which would be beneficial for n-paraffin upgrading.