Esterification of oleic acid with ethanol by 12-tungstophosphoric acid supported on zirconia

Oliveira, Claudinei Fabiano de; Dezaneti, L.M.; Garcia, Fillipe A.C.; Macedo, Julio L. de; Dias, José A.; Dias, Sílvia C.L.; Alvim, Kayne S.P.

doi:10.1016/j.apcata.2009.10.027

Cited by 171 publications

(75 citation statements)

References 34 publications

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“…Reuse of the catalyst is another advantage (Sharma et al, 2011;Oliveira et al, 2010;Bournay et al, 2005;Jiang et al, 2010). They are categorized as solid acid and solid base catalysts.…”

Section: Heterogeneous and Enzymatic Catalystsmentioning

confidence: 99%

Conversion of by-products from the vegetable oil industry into biodiesel and its use in internal combustion engines: a review

Piloto‐Rodríguez¹,

Melo²,

Pérez³

et al. 2014

Braz. J. Chem. Eng.

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-Biodiesel produced from by-products and waste materials can be an economical way of reducing traditional oil consumption and environmental problems. The by-products from the vegetable oil refining industry such as soapstock, acid oil and fatty acid distillates are suitable for producing biodiesel. The present work is a survey related to the use of these by-products to obtain biodiesel, covering not only the traditional and most widely used acid/base catalysis, but also solid and enzymatic catalysis. Details of the techniques are presented and compared. The advantages and drawbacks of the different approaches are mentioned and analyzed. The synthesis and use of by-products from the vegetable oil refining industry are covered in this work. The use of the obtained biodiesel in diesel engines is also included, demonstrating the disparity between the number of papers related to biodiesel production and engine performance assessment.

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“…Reuse of the catalyst is another advantage (Sharma et al, 2011;Oliveira et al, 2010;Bournay et al, 2005;Jiang et al, 2010). They are categorized as solid acid and solid base catalysts.…”

Section: Heterogeneous and Enzymatic Catalystsmentioning

confidence: 99%

Conversion of by-products from the vegetable oil industry into biodiesel and its use in internal combustion engines: a review

Piloto‐Rodríguez¹,

Melo²,

Pérez³

et al. 2014

Braz. J. Chem. Eng.

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“…However, a measured of interaction strength of HPW with support may be obtained from shift of more well defined bands to a region of lower wave number in comparison with the same band present on HPW pure (Figures 1-3). (Oliveira et al, 2010). The concentration of H 3 PW 12 O 40 on catalysts was measured by UV-Vis spectroscopy before and after 6 hours of adsorption.…”

Section: Ftirmentioning

confidence: 99%

“…hydrous zirconia, silica, alumina, and activated carbon) also were investigated and converting low quality canola oil containing to biodiesel at 200 C temperature (Kulkarni et al, 2006). Recently, the use of an impregnation route to support H 3 PW 12 O 40 on zirconia in acidic aqueous solution and further applied in the oleic acid esterification with ethanol was described (Oliveira et al, 2010). Those authors verified that 20% w/w H 3 PW 12 O 40 /ZrO 2 was the most active catalyst (ca.…”

Section: Keggin Heteropolyacid Catalysts: a Brief Introductionmentioning

confidence: 99%

Heterogeneous Catalysts Based on H3PW12O40 Heteropolyacid for Free Fatty Acids Esterification

Silva¹,

Cardoso²,

Menezes³

et al. 2011

Biodiesel - Feedstocks and Processing Technologies

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“…Phosphotungstic acid (PTA), the strongest heteropolyacid, is known as a highly efficient green catalyst (Ninomiya et al 2011). Some literature has reported the esterification of fatty acids into biodiesel by using PTA-supported carriers such as activated carbon, SBA-15 (Tropecêlo et al 2010;Brahmkhatri and Patel 2012), mesoporous silica (Patel and Brahmkhatri 2013), and zirconia (Oliveira et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Liquefaction of Fir Sawdust in Supercritical Ethanol with Dissolved Phosphotungstic Acid

ChangWei¹,

Zheng²,

Lv³

et al. 2015

BioResources

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An environmentally benign approach is put forward with the focus on directly liquefying and depolymerizing Cunninghamia lanceolata (Lamb.) Hook. (Chinese fir) sawdust into ethyl levulinate (EL) under supercritical ethanol (scEtOH) conditions by using phosphotungstic acid (PTA) as a catalyst. The effects of parameters such as catalyst dosage, temperature, and reaction time on alcoholysis yield were investigated. The experimental results show that the biomass alcoholysis yield reached 95.35% with 0.5 g PTA as a catalyst at 260 °C for 30 min. Alcoholysis yield and quantitative content of EL depended on the catalyst. The light bio-oil was primarily composed of phenols, aldehydes, ketones, and esters. A high quantitative content of EL up to 20.82% (AR, Relative abundance) was achieved, compared to 0.73% AR when PTA was not added. Hence, scEtOH with dissolved PTA may offer novel media for both chemical reactions and biomass conversion technology as a replacement for environmentally undesirable organic solvents.

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Esterification of oleic acid with ethanol by 12-tungstophosphoric acid supported on zirconia

Cited by 171 publications

References 34 publications

Conversion of by-products from the vegetable oil industry into biodiesel and its use in internal combustion engines: a review

Conversion of by-products from the vegetable oil industry into biodiesel and its use in internal combustion engines: a review

Heterogeneous Catalysts Based on H3PW12O40 Heteropolyacid for Free Fatty Acids Esterification

Liquefaction of Fir Sawdust in Supercritical Ethanol with Dissolved Phosphotungstic Acid

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