Publication detail

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

Authors: Čapek Libor | Hájek Martin | Kutálek Petr | Smoláková Lucie

Year: 2014

Type of publication: článek v odborném periodiku

Name of source: Fuel

Publisher name: Elsevier Science

Place: Oxford

Page from-to: 443-451

Titles:

Language	Name	Abstract	Keywords
cze	Aspekty draselného louhování v heterogenní katalyzované transesterifikaci řepkového oleje	Hlavním cílem práce je definovat aspekty stability pevných draselných katalyzátorů (K-CaO, K-MgO and K-Al2O3) v transesterifikaci řepkového oleje pomocí metanolu.	transesterifikace; stabilita; katalyzátory na bázi K; louhování
eng	Aspects of potassium leaching in the heterogeneously catalyzed transesterification of rapeseed oil	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.	Transesterification; Stability; Potassium solid-based catalysts; Leaching

Search

Login for students

Login for employees

Publication detail

Departments

Other Parts

Map

Services

Popular Links