Obtenção de ésteres via transesterificação com catalisador heterogêneo
Biodiesel is called a mixture of esters derived from lipid sources, such as vegetable oils or animal fats. The most used process for its production is the transesterification reaction. Typically, this method employs the use of methanol and homogeneous catalysis, but other types of alcohols and ca...
| Autor principal: | SOARES, Érika Cruz da Silva |
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| Grau: | Trabalho de Conclusão de Curso - Graduação |
| Publicado em: |
2019
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| Assuntos: | |
| Acesso em linha: |
https://bdm.ufpa.br/jspui/handle/prefix/2578 |
| Resumo: |
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Biodiesel is called a mixture of esters derived from lipid sources, such as vegetable
oils or animal fats. The most used process for its production is the transesterification
reaction. Typically, this method employs the use of methanol and homogeneous
catalysis, but other types of alcohols and catalysts can be used in this reaction. Thus,
the objective of this work was to synthesize a H3PMo12O40 x nH20 catalyst with
proton exchange by K (II) prepared by conventional techniques and characterized by
thermal analysis, powder X-ray diffraction and infrared spectroscopy. The possibility of
using a heteropolyacid salt as a solid catalyst for the transesterification reactions in
liquid phase was investigated by catalytic tests. By means of the analyzes performed,
it was possible to observe the presence of the Keggin unit on the catalyst and making
it heterogeneous through the synthesis of the salt. The catalytic tests were performed
in a stainless steel multi reactor. The best reaction condition was used methanol with
an oil: alcohol ratio of 1: 9, 10% catalyst, at 70 ° C for the reaction time of 2h. The
conversion of methyl esters was 50% and it was possible to verify the catalytic activity. |