Thermal characterization of hydrotalcite used in the transesterification of soybean oil |
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| Authors: | R M Queiroz Luiza H O Pires Ruth C P de Souza J R Zamian A G de Souza G N da Rocha Filho C E F da Costa |
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| Institution: | 1.Laboratório de Catálise e Oleoquímica, ICEN,Universidade Federal do Pará,Belém,Brazil;2.Laboratório de Combustíveis e Materiais, Departamento de Química,Universidade Federal da Paraíba,Jo?o Pessoa,Brazil |
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| Abstract: | Hydrotalcite was synthesised by co-precipitation method, calcined and characterized by XRD, BET, IR and TG/DTA/DTG analyses
and tested as solid base catalyst in the transesterification of soybean oil with methanol, achieving a methyl ester content
of 99.5%. The thermal decomposition of hydrotalcite calcined occurred in four mass loss steps at 28, 105, 203 and 400 °C.
The hydrotalcite was recovered and through a simple evaluation by TG/DTA/DTG techniques it was found that at 500 °C is the
temperature, where the organic matter should be eliminated from the catalyst. This study shows the importance of thermal analysis
in the evaluation of the recovery temperature of hydrotalcite. |
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