caa a22 4500 469126566 CHVBK 20180323133152.0 cr unu---uuuuu 170328e19920401xx s 000 0 eng 10.1007/BF02697529 doi (NATIONALLICENCE)springer-10.1007/BF02697529 Structure and acidity modification of mordenite through isomorphous Fe substitution [Elektronische Daten] [Geon Kim, Wha Ahn] A series of Fe-modified mordenite were hydrothermally synthesized. The effects of substrate composition, aging time, reaction temperature, and reaction time upon the crystallization of the mordenite were investigated. Isomorphous substitution of Fe was confirmed by FT-IR and EPR analysis. Acid strength and acid sites distribution of each catalyst were measured by pyridine TPD, which showed that the number of strong acid sites in H-Fe-mordenite are smaller than in H-Al-mordenite. Structural characteristics and thermal stability were also examined using XRD, SEM and TG. Fe-substitution into the mordenite structure have resulted in substantial decrease in thermal stability. H-Fe-mordenite catalysts showed high selectivity towards p-xylene in toluene alkylation and in xylene isomerization reaction, compared with those obtained using H-Al-mordenite because of lower concentration of strong acid sites. In addition, these H-Fe-modified mordenite showed little hexane cracking activity. Deactivation in both toluene alkylation and xylene isomerization reaction and coke formation over H-Fe-mordenite in these reactions were negligible. Korean Institute of Chemical Engineering, 1992 Kim Geon Department of Chemical Engineering, College of Engineering, Inha Univ., 402-751, Inchon, Korea aut Ahn Wha Department of Chemical Engineering, College of Engineering, Inha Univ., 402-751, Inchon, Korea aut Korean Journal of Chemical Engineering Springer-Verlag 9/2(1992-04-01), 60-65 0256-1115 9:2<60 1992 9 11814 https://doi.org/10.1007/BF02697529 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02697529 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim Geon Department of Chemical Engineering, College of Engineering, Inha Univ., 402-751, Inchon, Korea aut NATIONALLICENCE 700 1- Ahn Wha Department of Chemical Engineering, College of Engineering, Inha Univ., 402-751, Inchon, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer-Verlag 9/2(1992-04-01), 60-65 0256-1115 9:2<60 1992 9 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer