Sulfonated MCM-41 as potential catalyst to obtain biolubricants from vegetable oil
| Autor: | Aurélia R. O. Ferreira, Joaquín Silvestre-Albero, Martin E. Maier, Nágila M. P. S. Ricardo, Célio L. Cavalcante Jr, F. Murilo T. Luna |
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| Přispěvatelé: | Universidad de Alicante. Departamento de Química Inorgánica, Materiales Avanzados |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | RUA. Repositorio Institucional de la Universidad de Alicante Universidad de Alicante (UA) |
| Popis: | Biolubricants may be obtained from vegetable oils using appropriate chemical modifications, to improve their physicochemical properties for lubrication applications. In this study, the esterification of a free fatty acid (FFA) with long chain alcohols was performed using sulfonated mesoporous silica as catalyst. Fresh and functionalized MCM-41 samples were prepared to evaluate the effect of the sulfonic surface group on the esterification reaction. MCM-41 was functionalized via post-synthesis modification using 3-mercaptopropyltrimethoxysilane (MPTS) as silylating agent. The synthesized catalysts were characterized using several techniques. After the functionalization, a decrease in the apparent surface area and pore diameter were observed. The MCM-41/SO3H sample was applied in the esterification reaction of oleic acid (as a FFA model) using two different long-chain alcohols (octanol and 2-ethylhexanol). The catalytic results reveal that sulfonated catalyst showed excellent conversions (~ 100% mol when using octanol and > 93% mol using 2-ethylhexanol) and selectivities to esters (ca. 90%). The authors wish to acknowledge the financial support provided by FUNCAP (Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico) and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico). This study was financed in part by the CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior)—Brazil, Finance Code 001. Also, financial support from GV (PROMETEOII/2014/004), MINECO (MAT2016-80285-p) and H2020 (MSCA-RISE-2016/NanoMed Project) is gratefully acknowledged. |
| Databáze: | OpenAIRE |
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