caa a22 4500 60619536X CHVBK 20210128100919.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10934-015-9950-8 doi (NATIONALLICENCE)springer-10.1007/s10934-015-9950-8 para -Selectivity of silicalite-1 coated MFI type galloaluminosilicate in aromatization of light alkanes [Elektronische Daten] [Manabu Miyamoto, Kota Mabuchi, Jun Kamada, Yuichiro Hirota, Yasunori Oumi, Norikazu Nishiyama, Shigeyuki Uemiya] MFI type galloaluminosilicates (GaAlMFI) were coated with inert silicalite-1 layers. The silicalite-1 coating could improve the para-selectivity for xylene production in aromatization of propane. In the silicalite-1 coating step, low alkali concentration in the synthesis solution enhanced para-selectivity. A proton-exchange procedure also had an impact on the para-selectivity. Significant decrease of para-selectivity was observed over the silicalite-1 coated GaAlMFI with repeated proton-exchange. From the 71Ga and 27Al MAS NMR measurements, demetalation occurred during the proton-exchange process, and those metal species is likely to become catalytically active sites without para-selectivity. From the aromatization of propane and n-butane, para-selectivity in n-butane aromatization was found to be higher than that in propane aromatization. From the product distribution, naphthalene and its derivatives were easier to be produced in propane aromatization compared to n-butane aromatization. The formation of naphthalene and its derivatives may relate to decrease in the para-selectivity in propane aromatization. Springer Science+Business Media New York, 2015 Galloaluminosilicate nationallicence Silicalite-1 coating nationallicence MFI nationallicence Aromatization nationallicence p -Xylene nationallicence Miyamoto Manabu Department of Chemistry and Biomolecular Science, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut Mabuchi Kota Department of Materials Science and Technology, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut Kamada Jun Department of Materials Science and Technology, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut Hirota Yuichiro Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, 560-8531, Toyonaka, Osaka, Japan aut Oumi Yasunori Division of Instrument Analysis, Life Science Research Center, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut Nishiyama Norikazu Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, 560-8531, Toyonaka, Osaka, Japan aut Uemiya Shigeyuki Department of Chemistry and Biomolecular Science, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/3(2015-06-01), 769-778 1380-2224 22:3<769 2015 22 10934 https://doi.org/10.1007/s10934-015-9950-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-9950-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Miyamoto Manabu Department of Chemistry and Biomolecular Science, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut NATIONALLICENCE 700 1- Mabuchi Kota Department of Materials Science and Technology, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut NATIONALLICENCE 700 1- Kamada Jun Department of Materials Science and Technology, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut NATIONALLICENCE 700 1- Hirota Yuichiro Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, 560-8531, Toyonaka, Osaka, Japan aut NATIONALLICENCE 700 1- Oumi Yasunori Division of Instrument Analysis, Life Science Research Center, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut NATIONALLICENCE 700 1- Nishiyama Norikazu Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, 560-8531, Toyonaka, Osaka, Japan aut NATIONALLICENCE 700 1- Uemiya Shigeyuki Department of Chemistry and Biomolecular Science, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/3(2015-06-01), 769-778 1380-2224 22:3<769 2015 22 10934