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Synthesis of biodiesel from vegetable oil with methanol catalyzed by Li-doped magnesium oxide catalysts
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.
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2010 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 87, no 3, 743-748 p.Article in journal (Refereed) Published
Abstract [en]

The preparation of a Li-doped MgO for biodiesel synthesis has been investigated by optimizing the catalyst composition and calcination temperatures. The results show that the formation of strong base sites is particularly promoted by the addition of Li, thus resulting in an increase of the biodiesel synthesis. The catalyst with the Li/Mg molar ratio of 0.08 and calcination temperature of 823 K exhibits the best performance. The biodiesel conversion decreases with further increasing Lift molar ratio above 0.08, which is most likely attributed to the separated lithium hydroxide formed by excess Li ions and a concomitant decrease of BET values. In addition, the effects of methanol/oil molar ratio, reaction time, catalyst amount, and catalyst stability were also investigated for the optimized Li-doped MgO. The metal leaching from the Li-doped MgO catalysts was detected, indicating more studies are needed to stabilize the catalysts for its application in the large-scale biodiesel production facilities.

Place, publisher, year, edition, pages
2010. Vol. 87, no 3, 743-748 p.
Keyword [en]
Biodiesel, Transesterification, Li-doped, MgO, Solid base, soybean oil, nanocrystalline mgo, li/mgo catalysts, base catalysts, diesel-engine, transesterification, fuel, esterification, sunflower, emissions
URN: urn:nbn:se:kth:diva-19029DOI: 10.1016/j.apenergy.2009.09.013ISI: 000272563400003ScopusID: 2-s2.0-71849112559OAI: diva2:337076
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-01-25Bibliographically approved

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Yan, Jinyue
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