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Biodiesel production by heterogeneous catalysis - experimental study and kinetic modelling
KTH, School of Chemical Science and Engineering (CHE).
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Biodieselframställning med heterogen katalys - experimentell studie och kinetikmodellering (Swedish)
Abstract [en]

This work comprises two related studies regarding heterogeneous catalysts for production of biodiesel through transesterification of vegetable oils. For the experimental work a porous, anionic type ion-exchange catalyst (Diaion PA306s) was employed in a batch process with Jatropha curcas oil and methanol as reactants. For the theoretical work on a kinetic model, the considered system was a heterogeneous alkali catalyst, Li doped CaO on ZnO as support material, used with rapeseed oil and methanol.

In the experimental study, the effects of various reaction conditions were to have been tested for the purpose of designing a kinetic model and evaluating its kinetic parameters. The experimental work was however ended prematurely and the experimental data collected thus far were insufficient to reach the objective. In spite of this a few conclusions were reached: the reaction seems to give high yields even for non-optimal reaction conditions, but the reaction rate may be too low for a batch process. Due to promising results from previous work on this catalyst, more experiments ought to be executed and a kinetic model derived.

The theoretical work on the kinetic model serves as an illustration of how the model would have been constructed based on experimental data in the experimental study. The reaction mechanism was assumed to be Eley-Rideal-type mechanism, in which methanol adsorbed to the catalyst surface reacts with triglyceride in the reaction solution. The model fitted experimental data fairly well and the reaction rate constant for the surface reaction was determined.

Place, publisher, year, edition, pages
2011. , 53 p.
Keyword [en]
Biodiesel, transesterification, Jatropha, vegetable oil, heterogeneous catalyst
National Category
Corrosion Engineering
URN: urn:nbn:se:kth:diva-50023OAI: diva2:460871
Subject / course
Chemical Engineering
Educational program
Master of Science in Engineering - Chemical Science and Engineering
Physics, Chemistry, Mathematics
Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2011-12-01Bibliographically approved

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