@article{1fe7b1c5d88d44418a0d749b1e93fb4a,
title = "Large-pore silica spheres as support for samarium-coordinated undecamolybdophosphate: oxidative desulfurization of diesels",
abstract = "A novel composite has been prepared through the immobilization of the Keggin sandwich-type [Sm(PMo11O39)2]11− anion (SmPOM) on large-pore silica spheres previously functionalized with trimethylammonium groups (TMA). The resulting SmPOM@TMA-LPMS material has been evaluated as heterogeneous catalyst in a biphasic desulfurization 1:1 diesel/extraction solvent system using H2O2 as oxidant. Preliminary experiments were conducted with different extraction solvents, acetonitrile and [BMIM]PF6 ionic liquid. The optimized extractive and catalytic oxidative desulfurization system (ECODS) with [BMIM]PF6 was able to reach complete sulfur removal from a model diesel containing 2100 ppm S in just 60 min (10 min of initial extraction + 50 min of catalytic step). The reutilization of catalyst and extraction phase has been successfully performed without loss of desulfurization efficiency in consecutive cycles, turning the process more sustainable and cost-effective. The remarkable results with simulated diesel have motivated the application of the catalyst in the desulfurization of untreated real diesel and 74% of efficiency was achieved after only 2 h for three consecutive cycles.",
keywords = "Diesel, Heterogeneous catalysis, Oxidative desulfurization, Polyoxometalates",
author = "F{\'a}tima Mirante and Alves, {Ana Carolina} and Diana Juli{\~a}o and Almeida, {Pedro L.} and Sandra Gago and Rita Valen{\c c}a and Ribeiro, {Jorge C.} and {de Castro}, Baltazar and Granadeiro, {Carlos M.} and Balula, {Salete S.}",
note = "Funding Information: info:eu-repo/grantAgreement/FCT/5876/147333/PT# info:eu-repo/grantAgreement/FCT/5876/147218/PT# This work was partly funded through the projects REQUIMTE-LAQV [FCT ( Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia ) Ref. LAQV, REQUIMTE (POCI-01-0145-FEDER-007265)] and CENIMAT, I3N (POCI-01-0145-FEDER-007688), financed by national funds through the FCT/MEC and when appropriate co-financed by the Fundo Europeu de Desenvolvimento Regional (FEDER) under the PT2020 Partnership Agreement. This work is funded by national funds (OE), through FCT – Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia , I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. The FCT and the European Union are acknowledged for the post-graduation grant SFRH/BD/102783/2014 (to DJ) co-funded by Minist{\'e}rio da Ci{\^e}ncia, Tecnologia e Ensino Superior (MCTES) and the European Social Fund through the program POPH of QREN. The authors also acknowledge the Portuguese Nuclear Magnetic Resonance Network (PTNMR). ",
year = "2020",
month = jan,
day = "1",
doi = "10.1016/j.fuel.2019.116213",
language = "English",
volume = "259",
journal = "Fuel",
issn = "0016-2361",
publisher = "Elsevier Science B.V., Amsterdam.",
}