About: Study on the deactivation of the MCM-22 catalyst in liquid phase cyclopentene hydration

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Description	The deactivation of MCM-22 zeolite was found to occur gradually during the direct hydration of cyclopentene to cyclopentanol in the liquid phase. When the catalyst was re-used in the next batch hydration cycle, the reaction rate reached only half of original value. The high selectivity to cyclopentanol was retained even the re-used catalyst was employed in the hydration reaction. The deactivation of MCM-22 zeolite is caused by carbonaceous deposit settled down in catalyst pores. Crystallinity and structure of zeolite did not change either during the zeolite exposition in hydration cycle or during the catalyst reactivation at 823 K. The zeolite fast deactivation is caused by cyclopentadiene, which is impurity contained in commercial starting raw material, but the significant catalytic activity decrease was also observed, when the cyclopentene free of dienic impurities was used as a raw material. Therefore, carbonaceous deposit settled down in catalyst pores had to be generated although by acid catalysed reaction of olefinic cyclopentene. Only partial restoration of catalyst activity is possible, when MCM-22 is reactivated either using calcination under temperature programme 1 K.min-1/823 K/+8 hours or using hydrogen peroxide as oxygenation agent. The deactivation of MCM-22 zeolite was found to occur gradually during the direct hydration of cyclopentene to cyclopentanol in the liquid phase. When the catalyst was re-used in the next batch hydration cycle, the reaction rate reached only half of original value. The high selectivity to cyclopentanol was retained even the re-used catalyst was employed in the hydration reaction. The deactivation of MCM-22 zeolite is caused by carbonaceous deposit settled down in catalyst pores. Crystallinity and structure of zeolite did not change either during the zeolite exposition in hydration cycle or during the catalyst reactivation at 823 K. The zeolite fast deactivation is caused by cyclopentadiene, which is impurity contained in commercial starting raw material, but the significant catalytic activity decrease was also observed, when the cyclopentene free of dienic impurities was used as a raw material. Therefore, carbonaceous deposit settled down in catalyst pores had to be generated although by acid catalysed reaction of olefinic cyclopentene. Only partial restoration of catalyst activity is possible, when MCM-22 is reactivated either using calcination under temperature programme 1 K.min-1/823 K/+8 hours or using hydrogen peroxide as oxygenation agent. (en)
Title	Study on the deactivation of the MCM-22 catalyst in liquid phase cyclopentene hydration Study on the deactivation of the MCM-22 catalyst in liquid phase cyclopentene hydration (en)
skos:prefLabel	Study on the deactivation of the MCM-22 catalyst in liquid phase cyclopentene hydration Study on the deactivation of the MCM-22 catalyst in liquid phase cyclopentene hydration (en)
skos:notation	RIV/60461373:22310/12:43894516!RIV13-MSM-22310___
http://linked.open...avai/predkladatel	Fakulta chemické technologie
http://linked.open...avai/riv/aktivita	O P
http://linked.open...avai/riv/aktivity	O, P(ED2.1.00/03.0071)
http://linked.open...iv/cisloPeriodika	September
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Hlavačková, Anna Otmar, Jakub Kubů, Martin Krupka, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemické technologie
http://linked.open...dnocenehoVysledku	172256
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/12:43894516
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	hydration; cyclopentene; catalyst; MCM-22; deactivation (en)
http://linked.open.../riv/klicoveSlovo	hydration catalyst deactivation MCM-22 cyclopentene
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[4D0E965CFFE8]
http://linked.open...i/riv/nazevZdroje	Procedia Engineering
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Unipetrol Centre of Research and Education
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	42
http://linked.open...iv/tvurceVysledku	Kubů, Martin Lederer, Jaromír Krupka, Jiří Hlavačková, Anna Otmar, Jakub
issn	1877-7058
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.proeng.2012.07.568
http://localhost/t...ganizacniJednotka	22310
is http://linked.open...avai/riv/vysledek of	Study on the deactivation of the MCM-22 catalyst in liquid phase cyclopentene hydration

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