About: Aspects of potassium leaching in the heterogeneously catalyzed transesterification of rapeseed oil

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About: Aspects of potassium leaching in the heterogeneously catalyzed transesterification of rapeseed oil Goto Sponge Distinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The main aim of the work is to define the critical aspects of the stability of solid K-based catalysts (K-CaO, K-MgO and K-Al2O3) in the transesterification of rapeseed oil by methanol. High activity of these catalysts is often reported, but their stability is recently a matter for discussion. The attention is focused on (i) the explanation of the reason of potassium leaching from the solid K-based catalysts into the liquid phase during the reaction, (ii) a description of the role of leached K-species in the reaction and (iii) the suggestion of the mechanism of the potassium leaching from the solid K-based catalysts. It was found that the leaching of K-species is caused by glycerol that is formed during the reaction. The mechanism of K-leaching from the solid catalyst was suggested. The strength of alcohols to attack the K-species on solid catalysts increased with the number of alcohol groups and their mutual distances and has following order: glycerol } 1,3-propanediol } 1,2-propanediol } ethylene glycol } methanol. The main aim of the work is to define the critical aspects of the stability of solid K-based catalysts (K-CaO, K-MgO and K-Al2O3) in the transesterification of rapeseed oil by methanol. High activity of these catalysts is often reported, but their stability is recently a matter for discussion. The attention is focused on (i) the explanation of the reason of potassium leaching from the solid K-based catalysts into the liquid phase during the reaction, (ii) a description of the role of leached K-species in the reaction and (iii) the suggestion of the mechanism of the potassium leaching from the solid K-based catalysts. It was found that the leaching of K-species is caused by glycerol that is formed during the reaction. The mechanism of K-leaching from the solid catalyst was suggested. The strength of alcohols to attack the K-species on solid catalysts increased with the number of alcohol groups and their mutual distances and has following order: glycerol } 1,3-propanediol } 1,2-propanediol } ethylene glycol } methanol. (en)
Title	Aspects of potassium leaching in the heterogeneously catalyzed transesterification of rapeseed oil Aspects of potassium leaching in the heterogeneously catalyzed transesterification of rapeseed oil (en)
skos:prefLabel	Aspects of potassium leaching in the heterogeneously catalyzed transesterification of rapeseed oil Aspects of potassium leaching in the heterogeneously catalyzed transesterification of rapeseed oil (en)
skos:notation	RIV/00216275:25310/14:39898174!RIV15-GA0-25310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GAP106/11/0773)
http://linked.open...iv/cisloPeriodika	January
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Čapek, Libor Hájek, Martin Smoláková, Lucie Kutálek, Petr
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	Univerzita Pardubice / Fakulta chemicko-technologická
http://linked.open...dnocenehoVysledku	4190
http://linked.open...ai/riv/idVysledku	RIV/00216275:25310/14:39898174
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Leaching; Potassium solid-based catalysts; Stability; Transesterification (en)
http://linked.open.../riv/klicoveSlovo	Leaching Transesterification Stability Potassium solid-based catalysts
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[7FC5F6F159A9]
http://linked.open...i/riv/nazevZdroje	Fuel
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Analysis of the structure/activity relationship of acid-base heterogeneous catalysts in esterification and transesterification reactions
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	115
http://linked.open...iv/tvurceVysledku	Smoláková, Lucie Čapek, Libor Hájek, Martin Kutálek, Petr
http://linked.open...ain/vavai/riv/wos	000325647000049
issn	0016-2361
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.fuel.2013.07.081
http://localhost/t...ganizacniJednotka	25310

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