Detalhes bibliográficos
| Resumo: | Mesoporous silica nanoparticles (MSNs) strategically functionalized were used to immobilize a homogeneous polyoxomolybdate catalyst [PMo 12 O 40 ] 3- (PMo 12 ), active but unstable. The PMo 12 @TBA-MSN composite (where TBA refers to surface-tethered tributylammonium groups) conferred high stability to the polyoxomolybdate catalytic center and displayed an increase in efficiency for the oxidative desulfurization (ECODS) of a diesel simulant under sustainable conditions (using H 2 O 2 as oxidant and an ionic liquid, [BMIM]PF 6 , as solvent). Continuous reuse of the catalyst and ionic liquid solvent in consecutive ECODS cycles was successfully performed, avoiding the production of residual wastes. The performance of the PMo 12 @TBA-MSN catalyst improved upon its reuse, leading to complete desulfurization of a multicomponent model diesel containing benzothiophene derivatives after just 1 h of the catalytic stage of the process. The robust nature of the supported catalyst was indicated by characterization of the recovered solid which showed retention of the structural and chemical integrities. |
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| Autores principais: | Mirante, Fátima |
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| Outros Autores: | Gomes, Neide; Branco, Luís C.; Cunha-Silva, Luís; Almeida, Pedro L.; Pillinger, Martyn; Gago, Sandra; Granadeiro, Carlos M.; Balula, Salete S. |
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| Assunto: | Fuels Heterogeneous catalysis Mesoporous silica nanoparticles Oxidative desulfurization Polyoxomolybdate General Chemistry General Materials Science Condensed Matter Physics Mechanics of Materials |
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| Ano: | 2019 |
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| País: | Portugal |
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| Tipo de documento: | artigo |
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| Tipo de acesso: | acesso aberto |
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| Instituição associada: | Universidade Nova de Lisboa |
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| Idioma: | inglês |
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| Origem: | Repositório Institucional da UNL |
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