Publicação
Valorization of waste cooking oils through [HMIM][HSO4] ionic liquid-catalyzed biodiesel conversion
| Resumo: | A recent trend is the search for alternative technologies to fossil fuel-based energy sources. One possible solution is to use biodiesel as a diesel substitute, reducing environmental impacts such as pollutant emissions. Biodiesel consists of a mixture of long-chain fatty acid alkyl esters and is produced by converting vegetable oils or animal fats by transesterification reactions (Ullah et al., 2015). Due to the relatively high raw material cost, there is a need to reduce the final price of biodiesel. Thus, oil sources not competing with the food market, such as waste cooking oils (WCOs), are used. However, these oils show high levels of free fatty acids (FFA), which can cause problems in alkaline transesterification in the classic biodiesel production process. To minimize these problems, ionic liquids (ILs) can be used as catalysts, since they also promote esterificationreactions of FFA to biodiesel. ILs present a few advantages related to their recoverability and reusability, as well as environmental and safety perspectives(Ullah, 2015). Thus, the objective of this work is to study the production of biodiesel by applying 1-methylimidazolium hydrogen sulphate IL([HMIM][HSO4]) as a catalyst in esterification/transesterification reactions with methanol, for oleic acid (OA) and samples of simulated high acidic oils, prepared by a mixture of 40%(w/w) OA and 60%(w/w) WCO. The IL recovery procedure was studied to evaluate the maximum number of recovery cycles that can be performed without significant loss of reaction yield. |
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| Autores principais: | Diniz, Heloísa Oliveira Resende |
| Outros Autores: | Queiroz, Ana; Ribeiro, António E.; Brito, Paulo |
| Assunto: | Biodiesel Waste cooking |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | póster em conferência |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital do IPB |
| Resumo: | A recent trend is the search for alternative technologies to fossil fuel-based energy sources. One possible solution is to use biodiesel as a diesel substitute, reducing environmental impacts such as pollutant emissions. Biodiesel consists of a mixture of long-chain fatty acid alkyl esters and is produced by converting vegetable oils or animal fats by transesterification reactions (Ullah et al., 2015). Due to the relatively high raw material cost, there is a need to reduce the final price of biodiesel. Thus, oil sources not competing with the food market, such as waste cooking oils (WCOs), are used. However, these oils show high levels of free fatty acids (FFA), which can cause problems in alkaline transesterification in the classic biodiesel production process. To minimize these problems, ionic liquids (ILs) can be used as catalysts, since they also promote esterificationreactions of FFA to biodiesel. ILs present a few advantages related to their recoverability and reusability, as well as environmental and safety perspectives(Ullah, 2015). Thus, the objective of this work is to study the production of biodiesel by applying 1-methylimidazolium hydrogen sulphate IL([HMIM][HSO4]) as a catalyst in esterification/transesterification reactions with methanol, for oleic acid (OA) and samples of simulated high acidic oils, prepared by a mixture of 40%(w/w) OA and 60%(w/w) WCO. The IL recovery procedure was studied to evaluate the maximum number of recovery cycles that can be performed without significant loss of reaction yield. |
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