caa a22 4500 465743226 CHVBK 20180323111813.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF02697349 doi (NATIONALLICENCE)springer-10.1007/BF02697349 The selectivity changes in 1-hexene isomerization and its relation to acid properties of Pd/SAPO-11, SAPO-11, HZSM-5, and H-mordenite catalysts [Elektronische Daten] [Suk-Jin Choung, John Butt] The activity and selectivity patterns for 1-hexene isomerrzation have been compared in the temperature range of 150-450°C for four different kinds of acidic zeolites (H-mordenite, HZSM-5, SAPO-11 and Pd/SAPO-11) differing both ir acid properties and geometric structure. At lower reaction temperatures (150-175°C) the predominant reaction pathway was double bond shift(DBS) and was not influenced by the type of catalyst. At higher temperatures significant shifts in selectivity were observed from DBS to cracking (C) or skeletal rearrangement (SR) depending on the type of catalyst. Temperature programmed desorption (TPD) patterns of chemisorbed NH3 were also determined. Three different peaks were found for the most of TPD patterns. The first peak might be associated with Lewis acidsite, and the other two peaks at higher temperatures might be associated with Brönsted acid-sites. It was found that significant loss of strong Brönsted acidity upon Pd loading on SAPO-11. A selectivity correlation at 350°C showed strong dependence of DBS and cracking on total acidity. The reaction seems well suited for investigation of the interrelation between pore structure and surface acidity in terms of these selectivity factors. Korean Institute of Chemical Engineering, 1990 Choung Suk-Jin Department of Chemical Engineering, Kyung Hee University, 130-701, Seoul aut Butt John Department of Chemical Engineering, Kyung Hee University, 130-701, Seoul aut Korean Journal of Chemical Engineering Springer-Verlag 7/3(1990-07-01), 175-181 0256-1115 7:3<175 1990 7 11814 https://doi.org/10.1007/BF02697349 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02697349 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Choung Suk-Jin Department of Chemical Engineering, Kyung Hee University, 130-701, Seoul aut NATIONALLICENCE 700 1- Butt John Department of Chemical Engineering, Kyung Hee University, 130-701, Seoul aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer-Verlag 7/3(1990-07-01), 175-181 0256-1115 7:3<175 1990 7 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer