Investigation of the chemisorption of propylene on zinc oxide by temperature-programmed desorption |
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Authors: | R Spinicci A Tofanari |
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Institution: | (1) Istituto di Chimica Applicata dell'Universitá di Firenze, Via S. Marta, 3, 50139 Firenze, Italy |
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Abstract: | The interactions of propylene with zinc oxide have been studied by temperature-programmed desorption (TPD) under experimental conditions free of inter- or intraparticle limitations or readsorption phenomena.The results indicate that propylene is adsorbed on two types of active sites, and the Arrhenius parameters for the corresponding desorption processes have been calculated; moreover, on the basis of these results, important hypotheses can be made regarding the reaction mechanisms of the total oxidation and the dehydroaromatization of propylene on zinc oxide.The experiments confirm that thermal methods can be successfully used in the interesting and important field of heterogeneous catalysis.
Zusammenfassung Die Wechselwirkungen von Propylen mit Zinkoxid wurden durch temperaturprogrammierte Desorption (TPD) unter Versuchsbedingungen frei von inter- oder intrapartikulären Begrenzungen oder Readsorptionserscheinungen untersucht.Die Ergebnisse zeigen, daß Propylen an zwei Typen von aktiven Stellen adsorbiert wird. Die Arrhenius-Parameter für die entsprechenden Desorptionsprozesse wurden berechnet. Aufgrund dieser Ergebnisse können wichtige Hypothesen bezüglich des Reaktionsmechanismus der totalen Oxidation und der Dehydroaromatisierung von Propylen an Zinkoxid aufgestellt werden.Die Versuche bestätigen, daß thermische Methoden auf dem interessanten und wichtigen Gebiet der heterogenen Katalyse mit Erfolg eingesetzt werden können.
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![icy](/content/v763872w41841514/xxlarge1080.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![scy](/content/v763872w41841514/xxlarge1089.gif) ![lcy](/content/v763872w41841514/xxlarge1083.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![dcy](/content/v763872w41841514/xxlarge1076.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![gcy](/content/v763872w41841514/xxlarge1075.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![dcy](/content/v763872w41841514/xxlarge1076.gif) ![rcy](/content/v763872w41841514/xxlarge1088.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![acy](/content/v763872w41841514/xxlarge1072.gif) ![rcy](/content/v763872w41841514/xxlarge1088.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![mcy](/content/v763872w41841514/xxlarge1084.gif) ![acy](/content/v763872w41841514/xxlarge1072.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![zcy](/content/v763872w41841514/xxlarge1079.gif) ![acy](/content/v763872w41841514/xxlarge1072.gif) ![tscy](/content/v763872w41841514/xxlarge1094.gif) ![pcy](/content/v763872w41841514/xxlarge1087.gif) ![rcy](/content/v763872w41841514/xxlarge1088.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![pcy](/content/v763872w41841514/xxlarge1087.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![lcy](/content/v763872w41841514/xxlarge1083.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![kcy](/content/v763872w41841514/xxlarge1082.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![scy](/content/v763872w41841514/xxlarge1089.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![kcy](/content/v763872w41841514/xxlarge1082.gif) . ![Ecy](/content/v763872w41841514/xxlarge1069.gif) ![kcy](/content/v763872w41841514/xxlarge1082.gif) ![scy](/content/v763872w41841514/xxlarge1089.gif) ![pcy](/content/v763872w41841514/xxlarge1087.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![rcy](/content/v763872w41841514/xxlarge1088.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![mcy](/content/v763872w41841514/xxlarge1084.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![pcy](/content/v763872w41841514/xxlarge1087.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![dcy](/content/v763872w41841514/xxlarge1076.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![vcy](/content/v763872w41841514/xxlarge1074.gif) ![rcy](/content/v763872w41841514/xxlarge1088.gif) ![dcy](/content/v763872w41841514/xxlarge1076.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![lcy](/content/v763872w41841514/xxlarge1083.gif) , ![chcy](/content/v763872w41841514/xxlarge1095.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![rcy](/content/v763872w41841514/xxlarge1088.gif) ![mcy](/content/v763872w41841514/xxlarge1084.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![chcy](/content/v763872w41841514/xxlarge1095.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![scy](/content/v763872w41841514/xxlarge1089.gif) ![kcy](/content/v763872w41841514/xxlarge1082.gif) ![mcy](/content/v763872w41841514/xxlarge1084.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![dcy](/content/v763872w41841514/xxlarge1076.gif) ![ucy](/content/v763872w41841514/xxlarge1091.gif) ![scy](/content/v763872w41841514/xxlarge1089.gif) ![pcy](/content/v763872w41841514/xxlarge1087.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![shcy](/content/v763872w41841514/xxlarge1096.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![mcy](/content/v763872w41841514/xxlarge1084.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![gcy](/content/v763872w41841514/xxlarge1075.gif) ![ucy](/content/v763872w41841514/xxlarge1091.gif) ![bcy](/content/v763872w41841514/xxlarge1073.gif) ![ycy](/content/v763872w41841514/xxlarge1099.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![scy](/content/v763872w41841514/xxlarge1089.gif) ![pcy](/content/v763872w41841514/xxlarge1087.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![lcy](/content/v763872w41841514/xxlarge1083.gif) ![softcy](/content/v763872w41841514/xxlarge1100.gif) ![zcy](/content/v763872w41841514/xxlarge1079.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![vcy](/content/v763872w41841514/xxlarge1074.gif) ![acy](/content/v763872w41841514/xxlarge1072.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![rcy](/content/v763872w41841514/xxlarge1088.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![scy](/content/v763872w41841514/xxlarge1089.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![vcy](/content/v763872w41841514/xxlarge1074.gif) ![acy](/content/v763872w41841514/xxlarge1072.gif) ![zhcy](/content/v763872w41841514/xxlarge1078.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![bcy](/content/v763872w41841514/xxlarge1073.gif) ![lcy](/content/v763872w41841514/xxlarge1083.gif) ![acy](/content/v763872w41841514/xxlarge1072.gif) ![scy](/content/v763872w41841514/xxlarge1089.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![gcy](/content/v763872w41841514/xxlarge1075.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![gcy](/content/v763872w41841514/xxlarge1075.gif) ![iecy](/content/v763872w41841514/xxlarge1077.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![ncy](/content/v763872w41841514/xxlarge1085.gif) ![ocy](/content/v763872w41841514/xxlarge1086.gif) ![gcy](/content/v763872w41841514/xxlarge1075.gif) ![kcy](/content/v763872w41841514/xxlarge1082.gif) ![acy](/content/v763872w41841514/xxlarge1072.gif) ![tcy](/content/v763872w41841514/xxlarge1090.gif) ![acy](/content/v763872w41841514/xxlarge1072.gif) ![lcy](/content/v763872w41841514/xxlarge1083.gif) ![icy](/content/v763872w41841514/xxlarge1080.gif) ![zcy](/content/v763872w41841514/xxlarge1079.gif) .
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