Kinetics of vegetable oil transesterificationcatalyzed by magnesium oxide supported on cashew nut shell liquid-templatedmesoporoussilica

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dc.contributor.authorAndrew, Anamagreth
dc.date.accessioned2019-10-30T14:57:21Z
dc.date.accessioned2020-01-07T15:45:16Z
dc.date.available2019-10-30T14:57:21Z
dc.date.available2020-01-07T15:45:16Z
dc.date.issued2012
dc.descriptionAvailable in print form, East Africana Collection, Dr. Wilbert Chagula Library, Class mark (THS EAF TP156.S45A62)en_US
dc.description.abstractIn this work, transesterification of jatropha oil using magnesium oxide supported on cashew nut shell liquid (CNSL) mesoporoustemplated silica (MTS) and its kinetics were investigated. The support, MTS (CNSL) was impregnated at three different ratios (1:1, 1:2, and 1:3) with MgO catalyst using Mg(NO3)2.6H2O as a precursor salt. The supported catalysts were prepared by wet impregnation. The catalysts were characterized with nitrogen adsorption/desorption studies, Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX), X-Ray Diffraction (XRD) and Fourier Transform Infrared (FT-IR) spectroscopy. The developed catalysts were evaluated in the transesterification reaction of jatropha oil in a batch reactor. A central composite rotatable design was used to optimize the effect of reaction temperature, reaction time and catalyst concentration. All variables were found to significantly affect the methyl ester yield where the most effective factors were found to be the catalyst concentration and reaction temperature followed by reaction time. The maximum conversions of 98.7% and 91.5% were found with 3MgO/MTS (CNSL) and 2MgO/MTS (CNSL) respectively, followed by the 1MgO/MTS (CNSL) catalyst with 81.6%. Rate constants for the three developed catalysts were 0.02831, 0.02886, 0.02896 min-1 for 1MgO/MTS (CNSL), 2MgO/MTS (CNSL), 3MgO/MTS (CNSL), respectively. It was concluded from the results that, 3MgO/MTS (CNSL) was an effective catalyst for jatropha transesterification reaction. The developed catalysts were found not to leach in the methanol, could be recovered, reused and still gave reasonable methyl ester yields.en_US
dc.identifier.citationAndrew, A (2012) Kinetics of vegetable oil transesterificationcatalyzed by magnesium oxide supported on cashew nut shell liquid-templatedmesoporoussilica,Master dissertation, University of Dar es Salaam, Dar es Salaam.en_US
dc.identifier.urihttp://localhost:8080/xmlui/handle/123456789/1616
dc.language.isoenen_US
dc.publisherUniversity of Dar es Salaamen_US
dc.subjectTransesterificationen_US
dc.subjectMagnesium oxideen_US
dc.subjectJatropha oilen_US
dc.subjectVegetable oilen_US
dc.titleKinetics of vegetable oil transesterificationcatalyzed by magnesium oxide supported on cashew nut shell liquid-templatedmesoporoussilicaen_US
dc.typeThesisen_US

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