<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ribeiro, Susana O.</style></author><author><style face="normal" font="default" size="100%">Granadeiro, Carlos M.</style></author><author><style face="normal" font="default" size="100%">Almeida, Pedro L</style></author><author><style face="normal" font="default" size="100%">Pires, Joao</style></author><author><style face="normal" font="default" size="100%">Capel-Sanchez, Maria C.</style></author><author><style face="normal" font="default" size="100%">Campos-Martin, Jose M.</style></author><author><style face="normal" font="default" size="100%">Gago, Sandra</style></author><author><style face="normal" font="default" size="100%">Baltazar de Castro</style></author><author><style face="normal" font="default" size="100%">Balula, Salete S.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Oxidative desulfurization strategies using Keggin-type polyoxometalate catalysts: Biphasic versus solvent-free systems</style></title><secondary-title><style face="normal" font="default" size="100%">Catalysis Today</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2019</style></year><pub-dates><date><style  face="normal" font="default" size="100%">{AUG 1}</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S0920586118316468</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">{SI}</style></number><volume><style face="normal" font="default" size="100%">333</style></volume><pages><style face="normal" font="default" size="100%">226-236</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Strategic polyoxometalate Keggin-type structural modification was performed to increase the oxidative catalytic performance to desulfurize model and real diesels. The most active lacunar structure {[}PW11O39](7-) (PW11) showed to complete desulfurize a simulated diesel after 60 min at 70 degrees C. Its application as homogeneous catalyst using a biphasic system 1: 1 diesel/acetonitrile needed to use an excess of oxidant (ratio H2O2/S = 8). The immobilization of the PW11 on amine-functionalized SBA-15 supports originated two heterogeneous catalysts PW11@aptesSBA-15 and PW11@tbaSBA-15. The best results were attained with the PW11@aptesSBA-15 catalyst showing identical oxidative desulfurization performance as the homogeneous analogue. As advantage, this heterogeneous catalyst promotes the complete desulfurization of simulated diesel using a solvent-free system, i.e. without the need of acetonitrile use. On the other hand, the same desulfurization efficiency could be achieved using half the amount of oxidant (H2O2/S = 4). The oxidative desulfurization of the real diesel achieved a remarkable 83.4% of efficiency after just 2 h. The recycling capacity of PW11@aptesSBA-15 catalyst was confirmed for eight consecutive cycles using the biphasic and the solvent-free systems. Its stability investigation demonstrates to be higher under the solvent-free system than the biphasic system, without practically any occurrence of PW11 leaching in the first case. On the other hand, the Venturello peroxocomplex {[}PO4\{W(O-2)(2)\}(4)](3-), recognized as active intermediate in the homogeneous biphasic system, was not identified in the heterogeneous catalytic systems.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;8th World Congress on Oxidation Catalysis on Oxidation Processes - Challenges and Solutions (WCOC), Polish Acad Sci, Jerzy Haber Inst Catalysis &amp;amp; Surgace Chem, Krakow, POLAND, SEP 03-08, 2017}&lt;/p&gt;
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