Nanostructured sodium–zeolite imidazolate framework (ZIF-8) doped with potassium by sol–gel processing for biodiesel production from soybean oil

Zeolite imidazolate framework (ZIF-8) doped with potassium (KNa/ZIF-8) was prepared under hydrothermal conditions. FTIR, powder XRD, scanning electron microscopy, N 2 physisorption and TGA were used to characterize synthesized catalysts. Furthermore, biodiesel was synthesized using soybean oil as th...

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Published inJournal of sol-gel science and technology Vol. 77; no. 2; pp. 404 - 415
Main Authors Saeedi, Mandana, Fazaeli, Razieh, Aliyan, Hamid
Format Journal Article
LanguageEnglish
Published New York Springer US 01.02.2016
Springer Nature B.V
Subjects
Basicity
Biodiesel
Biodiesel fuels
Catalysis
Catalysts
Ceramics
Chemical synthesis
Chemistry and Materials Science
Composites
Glass
Inorganic Chemistry
Materials Science
Methanol
Methyl alcohol
Nanotechnology
Natural Materials
Optical and Electronic Materials
Original Paper
Performance enhancement
Potassium
Scanning electron microscopy
Silicon dioxide
Sodium
Sol gel process
Sol-gel processes
Soya bean oil
Soybean oil
Soybeans
Transesterification
Vegetable oils
Zeolites
Vegetable oil
Potassium-doped catalyst
Biodiesel
Zeolite imidazolate framework (ZIF-8)
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Summary:Zeolite imidazolate framework (ZIF-8) doped with potassium (KNa/ZIF-8) was prepared under hydrothermal conditions. FTIR, powder XRD, scanning electron microscopy, N 2 physisorption and TGA were used to characterize synthesized catalysts. Furthermore, biodiesel was synthesized using soybean oil as the feedstock by KNa/ZIF-8-catalyzed transesterification process. In order to increase the basicity and consequently improve the performance of ZIF-8 in the transesterification of soybean oil with methanol, sodium and potassium were added to it. The effect of various reaction parameters, including methanol/oil molar ratio, reaction, catalyst mass and temperature on the reaction, was studied. Using KNa/ZIF-8 and methanol/oil molar ratio of 10:1 over a period of 3.5 h afforded a remarkable conversion of >98. The solid catalyst can be recycled least three times under mild conditions. KNa/ZIF-8 demonstrated higher activity in the transesterification of soybean oil compared with Na and K (as dopant) modifications on the conventional support (SiO 2 ) and other MOF (MIL-101 and MIL-100) materials. Graphical Abstract
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ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-015-3867-1