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论文类型：期刊论文

发表时间：2014-07-01

发表刊物：JOURNAL OF ENERGY CHEMISTRY

收录刊物：SCIE、EI、ISTIC、CSCD、Scopus

卷号：23

期号：4

页面范围：491-497

ISSN号：2095-4956

关键字：alkylation; toluene; methanol; morphology; ZSM-5

摘要：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 mu m 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.