Publication Type Journal Article
Title Mesoporous Silica vs. Organosilica Composites to Desulfurize Diesel
Authors Susana O. Ribeiro Carlos M. Granadeiro M. Corvo J. M. P. Silva Jose M. Campos-Martin Baltazar de Castro Salete S. Balula
Groups Chem4Env
Journal FRONTIERS IN CHEMISTRY
Year 2019
Month November
Volume 7
Number
Pages
Abstract The monolacunary Keggin-type [PW11O39](7-) (PW11) heteropolyanion was immobilized on porous framework of mesoporous silicas, namely SBA-15 and an ethylene-bridged periodic mesoporous organosilica (PMOE). The supports were functionalized with a cationic group (N-trimethoxysilypropyl-N, N, N-trimethylammonium, TMA) for the successful anchoring of the anionic polyoxometalate. The PW11@TMA-SBA-15 and PW11@TMA-PMOE composites were evaluated as heterogeneous catalysts in the oxidative desulfurization of a model diesel. The PW11@TMA-SBA-15 catalyst showed a remarkable desulfurization performance by reaching ultra-low sulfur levels (<10 ppm) after only 60 min using either a biphasic extractive and catalytic oxidative desulfurization (ECODS) system (1:1 MeCN/diesel) or a solvent-free catalytic oxidative desulfurization (CODS) system. Furthermore, the mesoporous silica composite was able to be recycled for six consecutive cycles without any apparent loss of activity. The promising results have led to the application of the catalyst in the desulfurization of an untreated real diesel supplied by CEPSA (1,335 ppm S) using the biphasic system. The system has proved to be a highly efficient process by reaching desulfurization values higher than 90\% for real diesel during three consecutive cycles.
DOI http://dx.doi.org/10.3389/fchem.2019.00756
ISBN
Publisher
Book Title
ISSN 2296-2646
EISSN
Conference Name
Bibtex ID ISI:000499824800001
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