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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Boffito, D. C. Galli, F. Pirola, C. Bianchi, C. L. Patience, G. S. |
| Description | Author Affiliation: Boffito DC ( Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy. Electronic address: daria-camilla.boffito@polymtl.ca.); Galli F ( Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy.); Pirola C ( Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy.); Bianchi CL ( Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy.); Patience GS ( Polytechnique Montréal, Departement de Génie Chimique, 2900 Édouard-Montpetit, 2500 Chemin Polytechnique, H3T 1J4 Montreal, Canada.) |
| Abstract | Ultrasound accelerates the free fatty acids esterification rate by reducing the mass transfer resistance between methanol in the liquid phase and absorbed organic species on Amberlyst®46 catalyst. The reaction rates of canola oil is three times greater than for tobacco seed oil but half the reaction rate of pure oleic acid as measured in a batch reactor. The beneficial effects of ultrasound vs. the conventional approach are more pronounced at lower temperatures (20°C and 40°C vs. 63°C): at 20°C, the free fatty acids conversion reaches 68% vs. 23% with conventional mechanical stirring. The increased conversion is attributed to acoustic cavitation that increases mass transfer in the vicinity of the active sites. The Eley-Rideal kinetic model in which the concentration of the reacting species is expressed taking into account the mass transfer between the phases is in excellent agreement with the experimental data. Ultrasound increases the mass transfer coefficient in the tobacco oil 6 and 4.1 fold at 20°C and 40°C, respectively. |
| File Format | HTM / HTML |
| ISSN | 13504177 |
| Issue Number | 6 |
| Volume Number | 21 |
| e-ISSN | 18732828 |
| Journal | Ultrasonics Sonochemistry |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-11-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Diagnostic Imaging Fatty Acids, Monounsaturated Chemistry Fatty Acids, Nonesterified Plant Oils Tobacco Esterification Kinetics Methanol Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Environmental Chemistry Acoustics and Ultrasonics Radiology, Nuclear Medicine and Imaging Chemical Engineering Inorganic Chemistry |
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