MICROWAVE ACTIVATION OF IMMOBILIZED LIPASE FOR TRANSESTERIFICATION OF VEGETABLE OILS
This work investigated the effect of microwave irradiation (MW) on the ethanolysis rate of soybean and sunflower oils catalyzed by supported Novozyme 435 (Candida antarctica). The effects of tert-butanol, water addition and oil:ethanol molar ratio on transesterification were evaluated under conventi...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2015-03-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000300303&lng=en&tlng=en |
| _version_ | 1811269115610923008 |
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| author | Monna Lisa B. Queiroz Rachel Freire Boaventura Micael Nunes Melo Heiddy M. Alvarez Cleide M. F. Soares Álvaro S. Lima Montserrat F. Heredia Cláudio Dariva Alini T. Fricks,* |
| author_facet | Monna Lisa B. Queiroz Rachel Freire Boaventura Micael Nunes Melo Heiddy M. Alvarez Cleide M. F. Soares Álvaro S. Lima Montserrat F. Heredia Cláudio Dariva Alini T. Fricks,* |
| author_sort | Monna Lisa B. Queiroz |
| collection | DOAJ |
| description | This work investigated the effect of microwave irradiation (MW) on the ethanolysis rate of soybean and sunflower oils catalyzed by supported Novozyme 435 (Candida antarctica). The effects of tert-butanol, water addition and oil:ethanol molar ratio on transesterification were evaluated under conventional heating (CH), and under optimum reaction conditions (with no added water in the system, 10% tert-butanol and 3:1 ethanol-to-oil molar ratio). The reactions were monitored up to 24 h to determine the conditions of initial reaction velocity. The investigated variables under MW (50 W) were: reaction time (5.0-180 min) and mode of reactor operation (fixed power, dynamic and cycles) in the absence and presence of tert-butanol (10% (w/w). The measured response was the reaction conversion in ethyl esters, which was linked to the enzyme catalytic activity. The results indicated that the use of microwave improved the activity at fixed power mode. A positive effect of the association of tert-butanol and MW irradiation on the catalytic activity was observed. The reaction rate improved in the order of approximately 1.5 fold compared to that under CH with soybean oil. Using soybean oil, the enzymatic transesterification under MW for conversion to FAEE (fatty acid ethyl esters) reached >99% in 3h, while with the use of CH the conversions were about 57% under similar conditions. |
| first_indexed | 2024-04-12T21:36:16Z |
| format | Article |
| id | doaj.art-ff73aef2122246efaccd308a357cec0c |
| institution | Directory Open Access Journal |
| issn | 1678-7064 |
| language | English |
| last_indexed | 2024-04-12T21:36:16Z |
| publishDate | 2015-03-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-ff73aef2122246efaccd308a357cec0c2022-12-22T03:15:54ZengSociedade Brasileira de QuímicaQuímica Nova1678-70642015-03-0138330330810.5935/0100-4042.20150031S0100-40422015000300303MICROWAVE ACTIVATION OF IMMOBILIZED LIPASE FOR TRANSESTERIFICATION OF VEGETABLE OILSMonna Lisa B. QueirozRachel Freire BoaventuraMicael Nunes MeloHeiddy M. AlvarezCleide M. F. SoaresÁlvaro S. LimaMontserrat F. HerediaCláudio DarivaAlini T. Fricks,*This work investigated the effect of microwave irradiation (MW) on the ethanolysis rate of soybean and sunflower oils catalyzed by supported Novozyme 435 (Candida antarctica). The effects of tert-butanol, water addition and oil:ethanol molar ratio on transesterification were evaluated under conventional heating (CH), and under optimum reaction conditions (with no added water in the system, 10% tert-butanol and 3:1 ethanol-to-oil molar ratio). The reactions were monitored up to 24 h to determine the conditions of initial reaction velocity. The investigated variables under MW (50 W) were: reaction time (5.0-180 min) and mode of reactor operation (fixed power, dynamic and cycles) in the absence and presence of tert-butanol (10% (w/w). The measured response was the reaction conversion in ethyl esters, which was linked to the enzyme catalytic activity. The results indicated that the use of microwave improved the activity at fixed power mode. A positive effect of the association of tert-butanol and MW irradiation on the catalytic activity was observed. The reaction rate improved in the order of approximately 1.5 fold compared to that under CH with soybean oil. Using soybean oil, the enzymatic transesterification under MW for conversion to FAEE (fatty acid ethyl esters) reached >99% in 3h, while with the use of CH the conversions were about 57% under similar conditions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000300303&lng=en&tlng=enlipasemicrowaveFAEEbiodiesel |
| spellingShingle | Monna Lisa B. Queiroz Rachel Freire Boaventura Micael Nunes Melo Heiddy M. Alvarez Cleide M. F. Soares Álvaro S. Lima Montserrat F. Heredia Cláudio Dariva Alini T. Fricks,* MICROWAVE ACTIVATION OF IMMOBILIZED LIPASE FOR TRANSESTERIFICATION OF VEGETABLE OILS Química Nova lipase microwave FAEE biodiesel |
| title | MICROWAVE ACTIVATION OF IMMOBILIZED LIPASE FOR TRANSESTERIFICATION OF VEGETABLE OILS |
| title_full | MICROWAVE ACTIVATION OF IMMOBILIZED LIPASE FOR TRANSESTERIFICATION OF VEGETABLE OILS |
| title_fullStr | MICROWAVE ACTIVATION OF IMMOBILIZED LIPASE FOR TRANSESTERIFICATION OF VEGETABLE OILS |
| title_full_unstemmed | MICROWAVE ACTIVATION OF IMMOBILIZED LIPASE FOR TRANSESTERIFICATION OF VEGETABLE OILS |
| title_short | MICROWAVE ACTIVATION OF IMMOBILIZED LIPASE FOR TRANSESTERIFICATION OF VEGETABLE OILS |
| title_sort | microwave activation of immobilized lipase for transesterification of vegetable oils |
| topic | lipase microwave FAEE biodiesel |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000300303&lng=en&tlng=en |
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