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The use of cosolvents in heterogeneously and homogeneously catalysed methanolysis of oil
Authors: Hájek Martin | Vávra Aleš | Mach Petr | Straková Anna
Year: 2020
Type of publication: článek v odborném periodiku
Name of source: Journal of Environmental Management
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: "110295-1"-"110295-7"
Titles:
Language Name Abstract Keywords
cze Využití kosolventů v heterogenně a homogenně katalyzované metanolýze olejů Studie se zabývá vlivem kosolventů a jejich využití v metanolýze olejů pomocí homogenní a heterogenní katalýzy, Kosolventy umožňují rozpuštění oleje a metanolu v jedné fázi, a tím se urychluje reakce. metyl ester; transesterifikace; kosolvent; ternární diagram; heterogenní katalýza; homogenní katalýza
eng The use of cosolvents in heterogeneously and homogeneously catalysed methanolysis of oil The paper describes transesterification of oil by methanol with use of cosolvents such as ethyl acetate, tetrahydrofuran, hexane, acetone and diethyl ether at catalyst homogeneous (potassium hydroxide) and heterogeneous (mixed oxides). The cosolvents dissolve oil and methanol to form a single (homogeneous) phase, which increases the reaction rate. Therefore, the biodiesel production will be environmentally friendly because less energy is consumed, which increases sustainability. The whole binodal curve of ternary plots of oil, methanol and cosolvent was determined to find the molar ratio, in which the reaction mixture forms a single phase. The ethyl acetate and tetrahydrofuran have relatively small heterogeneous region, because of the similarity of their electric dipole moment with methanol. After transesterification, the detailed analysis of ester and also glycerol phase was carried out. For homogeneous catalyst, the highest esters content in the ester phase was achieved with tetrahydrofuran. For heterogeneous catalyst, the ester content was lower with cosolvent than without cosolvent, probably due to dilution of reaction components by cosolvent or bonding of cosolvent to the active sites of the catalyst. Methyl ester; Transesterification; Cosolvents; Ternary plot; Heterogeneous catalyst; Homogeneous catalyst

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