authors |
Mirante, F; Gomes, N; Branco, LC; Cunha-Silva, L; Almeida, PL; Pillinger, M; Gago, S; Granadeiro, CM; Balula, SS |
nationality |
International |
journal |
MICROPOROUS AND MESOPOROUS MATERIALS |
author keywords |
Mesoporous silica nanoparticles; Polyoxomolybdate; Heterogeneous catalysis; Oxidative desulfurization; Fuels |
keywords |
AEROBIC OXIDATIVE DESULFURIZATION; SILICA NANOPARTICLES; IONIC LIQUID; DEEP DESULFURIZATION; EFFICIENT CATALYSTS; MODEL DIESEL; POLYOXOMETALATE; SYSTEM; REAL; DIBENZOTHIOPHENE |
abstract |
Mesoporous silica nanoparticles (MSNs) strategically functionalized were used to immobilize a homogeneous polyoxomolybdate catalyst [PMo12O40](3-) (PMo12), active but unstable. The PMo12@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 H2O2 as oxidant and an ionic liquid, [BMIM]PF6, 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 PMo12@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. |
publisher |
ELSEVIER SCIENCE BV |
issn |
1387-1811 |
isbn |
1873-3093 |
year published |
2019 |
volume |
275 |
beginning page |
163 |
ending page |
171 |
digital object identifier (doi) |
10.1016/j.micromeso.2018.07.036 |
web of science category |
Chemistry, Applied; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary |
subject category |
Chemistry; Science & Technology - Other Topics; Materials Science |
unique article identifier |
WOS:000452942500019
|