caa a22 4500 44538784X CHVBK 20180317143037.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s11144-011-0292-5 doi (NATIONALLICENCE)springer-10.1007/s11144-011-0292-5 Synthesis and characterization of H-ZSM-5 zeolites and their catalytic performance in CH3Br conversion to aromatics [Elektronische Daten] [Ling Tao, Gui-Sheng Li, Shuang-Feng Yin, Qiang Ou-Yang, Sheng-Lian Luo, Xiao-Ping Zhou, Chak-Tong Au] Described in this paper are the synthesis, characterization and catalytic application of H-ZSM-5 zeolites for the conversion of CH3Br into aromatics. The H-ZSM-5 zeolites were fabricated by hydrothermal crystallization using n-butylamine (BTA) as a template and characterized by XRD, SEM and NH3-TPD techniques. The effects of batch SiO2/Al2O3 ratio, alkalinity, NaCl/Al2O3 ratio, seed crystals, and crystallization time on the yield, structure/texture and catalytic performance were systematically studied. Adopting the optimum sol (SiO2/Al2O3=70, BTA/SiO2=0.2847, Na2O/SiO2=0.1237, H2O/SiO2=37.4, NaCl/Al2O3=60, and seed/SiO2=5wt%) and under the most preferable crystallization conditions of 100°C/24h-170°C/24h, H-ZSM-5 zeolites of high crystallinity and small size (300-700nm) were obtained. Good catalytic performance was observed over the H-ZSM-5 zeolites (aromatic yield up to 44.2%). However, unlike the modification of large commercial HZSM-5, the use of MoO3 or PbO as modifying agents for the small-size H-ZSM-5 zeolites results in a decline of catalytic performance. The relationship between the structure and the catalytic efficiency of as-synthesized H-ZSM-5 samples were investigated. It was found that with crystallinity enhancement and/or decline in crystal size, there is improvement of catalytic performance. Akadémiai Kiadó, Budapest, Hungary, 2011 ZSM-5 zeolite nationallicence Methyl bromide nationallicence Aromatic hydrocarbon nationallicence Acid catalyst nationallicence Tao Ling College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut Li Gui-Sheng College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut Yin Shuang-Feng College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut Ou-Yang Qiang College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut Luo Sheng-Lian College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut Zhou Xiao-Ping College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut Au Chak-Tong College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 103/1(2011-06-01), 191-207 1878-5190 103:1<191 2011 103 11144 https://doi.org/10.1007/s11144-011-0292-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-011-0292-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tao Ling College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut NATIONALLICENCE 700 1- Li Gui-Sheng College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut NATIONALLICENCE 700 1- Yin Shuang-Feng College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut NATIONALLICENCE 700 1- Ou-Yang Qiang College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut NATIONALLICENCE 700 1- Luo Sheng-Lian College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut NATIONALLICENCE 700 1- Zhou Xiao-Ping College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut NATIONALLICENCE 700 1- Au Chak-Tong College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, Hunan, China aut NATIONALLICENCE 773 0- Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 103/1(2011-06-01), 191-207 1878-5190 103:1<191 2011 103 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer