Produção de biodiesel via transesterificação etílica com zeólitas básicas
Soybean oil transesterification with ethanol was carried out in a batch reactor using USY zeolites modified with barium and strontium (15 wt.%) as catalysts. A series of three catalytic cycles were performed for each zeolite without any loss of activity. The biodiesel product was analyzed by HPLC an...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2012-01-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422012000100022&lng=en&tlng=en |
| _version_ | 1818082534974554112 |
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| author | Grace F. Ghesti Julio L. de Macedo José A. Dias Sílvia C. L. Dias |
| author_facet | Grace F. Ghesti Julio L. de Macedo José A. Dias Sílvia C. L. Dias |
| author_sort | Grace F. Ghesti |
| collection | DOAJ |
| description | Soybean oil transesterification with ethanol was carried out in a batch reactor using USY zeolites modified with barium and strontium (15 wt.%) as catalysts. A series of three catalytic cycles were performed for each zeolite without any loss of activity. The biodiesel product was analyzed by HPLC and FT-Raman, and the catalysts by pyridine and CO2 adsorption. Ba/USY provided higher conversions (> 97%) than Sr/USY (< 75%). The increased catalytic activity of Ba/USY was attributed to two different effects: a larger number of basic sites; and a lower interaction between barium species and HUSY BrØnsted sites. |
| first_indexed | 2024-12-10T19:23:38Z |
| format | Article |
| id | doaj.art-d8d309c94f1b4ff7b235c9cc9a037ad5 |
| institution | Directory Open Access Journal |
| issn | 1678-7064 |
| language | English |
| last_indexed | 2024-12-10T19:23:38Z |
| publishDate | 2012-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-d8d309c94f1b4ff7b235c9cc9a037ad52022-12-22T01:36:25ZengSociedade Brasileira de QuímicaQuímica Nova1678-70642012-01-0135111912310.1590/S0100-40422012000100022S0100-40422012000100022Produção de biodiesel via transesterificação etílica com zeólitas básicasGrace F. Ghesti0Julio L. de Macedo1José A. Dias2Sílvia C. L. Dias3Universidade de BrasíliaUniversidade de BrasíliaUniversidade de BrasíliaUniversidade de BrasíliaSoybean oil transesterification with ethanol was carried out in a batch reactor using USY zeolites modified with barium and strontium (15 wt.%) as catalysts. A series of three catalytic cycles were performed for each zeolite without any loss of activity. The biodiesel product was analyzed by HPLC and FT-Raman, and the catalysts by pyridine and CO2 adsorption. Ba/USY provided higher conversions (> 97%) than Sr/USY (< 75%). The increased catalytic activity of Ba/USY was attributed to two different effects: a larger number of basic sites; and a lower interaction between barium species and HUSY BrØnsted sites.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422012000100022&lng=en&tlng=enbiodieselbasic zeolitestransesterification |
| spellingShingle | Grace F. Ghesti Julio L. de Macedo José A. Dias Sílvia C. L. Dias Produção de biodiesel via transesterificação etílica com zeólitas básicas Química Nova biodiesel basic zeolites transesterification |
| title | Produção de biodiesel via transesterificação etílica com zeólitas básicas |
| title_full | Produção de biodiesel via transesterificação etílica com zeólitas básicas |
| title_fullStr | Produção de biodiesel via transesterificação etílica com zeólitas básicas |
| title_full_unstemmed | Produção de biodiesel via transesterificação etílica com zeólitas básicas |
| title_short | Produção de biodiesel via transesterificação etílica com zeólitas básicas |
| title_sort | producao de biodiesel via transesterificacao etilica com zeolitas basicas |
| topic | biodiesel basic zeolites transesterification |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422012000100022&lng=en&tlng=en |
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