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Calcium and tin oxides for heterogeneous transesterification of Babasssu oil (Attalea speciosa)
KTH, Skolan för kemivetenskap (CHE). UMSS Universidad Mayor de San Simón, Bolivia.ORCID-id: 0000-0002-3182-7655
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Kemisk teknologi.ORCID-id: 0000-0002-6212-4194
2016 (engelsk)Inngår i: Journal of Environmental Chemical Engineering, ISSN 2160-6544, E-ISSN 2213-3437, Vol. 4, nr 4, s. 4870-4877Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

Non-edible oils and waste cooking oils are alternatives to uphold a sustainable large scale production of biodiesel considering large volumes and by-products. Babassu oil (Attalea speciosa) offers a challenging case study scenario for the preparation of a heterogeneous catalytic material. This study shows the binary synthesis of calcium and stannic oxide (CaO/SnO2) catalysts for transesterification of oils with high content of free fatty acids (FFAs). The catalysts were prepared with several mass ratios of CaO:SnO2 in the proportions of 1:4, 4:1, 7:3 and 1:1. The catalysts were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), and N2-physisorption analyses. Biodiesel production was tested using a 23 full factorial design with variables such as temperature, methanol/oil molar ratio, and catalyst weight relative to oil. Such design statistically proved that there was no significant effect over the response variable. Furthermore a Box-Behnken design surface response analysis using the same three variables with three levels was performed with MATLAB showing a non-linear relation and statistical response of the optimal conditions for biodiesel production. The optimal experimental conditions were found to be 54.1°C, agitation speed at 250rpm with 6wt.% of CaO/SnO2 (7:3 mass ratio of the binary catalyst) and 10:1 (methanol:oil) molar ratio. The catalyst has shown a high potential for conversion of Babassu oil by fine-tuning as a single step by simultaneous esterification and transesterification to biodiesel.

sted, utgiver, år, opplag, sider
Elsevier, 2016. Vol. 4, nr 4, s. 4870-4877
Emneord [en]
Babassu oil, Biodiesel, Heterogeneous catalyst, Mixed oxides, Transesterification, Calcium, Catalysts, Electron microscopy, Fatty acids, High resolution transmission electron microscopy, Methanol, Scanning electron microscopy, Tin oxides, Transmission electron microscopy, X ray diffraction, Full factorial design, Heterogeneous transesterification, Large scale productions, Mixed oxide, Optimal experimental conditions, Powder X ray diffraction, Oils and fats
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URN: urn:nbn:se:kth:diva-186798DOI: 10.1016/j.jece.2016.04.006ISI: 000391701400009Scopus ID: 2-s2.0-84964329865OAI: oai:DiVA.org:kth-186798DiVA, id: diva2:943098
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QC 20160627

Tilgjengelig fra: 2016-06-27 Laget: 2016-05-13 Sist oppdatert: 2017-11-28bibliografisk kontrollert

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