Effect of ZSM-5 zeolite morphology on the catalytic performance of the alkylation of toluene with methanol

• Published in: Journal of energy chemistry Vol. 23; no. 4; pp. 491 - 497
• Main Authors: Wu, Hongyu, Liu, Min, Tan, Wei, Hou, Keke, Zhang, Anfeng, Wang, Yiren, Guo, Xinwen
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.07.2014; Elsevier
• Subjects: alkylation; Catalysis; Catalytic reactions; Chemistry; Exact sciences and technology; General and physical chemistry; methanol; morphology; NH3-TPD; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; toluene; ZSM-5; ZSM-5沸石; 催化性能; 对二甲苯; 形态; 扫描电子显微镜; 烷基化反应; 甲醇; methanol; alkylation; morphology; toluene; ZSM-5; Stability; Hydrocarbon; Toluene; Zeolite; Molecular sieve; Primary alcohol; Characterization; Structure activity relation; Morphology; Xylene; Aromatic compound; Methylation; Catalyst activity; Catalyst; Methanol
• ISSN: 2095-4956
• DOI: 10.1016/S2095-4956(14)60176-5

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 NaC1 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 samole showed the best stability amonz the tested three modified samoles.