کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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63982 | 48263 | 2014 | 7 صفحه PDF | دانلود رایگان |
A series of ZSM-5 zeolites, with the morphologies of sphere, sphere with cubic particles on the surface, and cubic particles, were synthesized by hydrothermal method using n-butylamine as the template, assisted by the addition of NaCl and crystal seed. X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray fluorescence (XRF) and temperature-programmed desorption of ammonia (NH3-TPD) were used to characterize these samples. The samples were tested with toluene methylation reaction. The modified sample composed of spherical particles with 3 μm crystal particles on the surface had a para-xylene selectivity of 95% and maintained 79% of the initial conversion after running the reaction for 50 h. This modified sample showed the best stability among the tested three modified samples.
ZSM-5-C sample appeared good stability during the toluene methylation reaction, due to its proper pore structure and abundant intergranular pores.Figure optionsDownload as PowerPoint slide
Journal: Journal of Energy Chemistry - Volume 23, Issue 4, July 2014, Pages 491–497