Abstract
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.
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