Author(s): Ribeiro, Susana O. ; Nogueira, Lucie S. ; Gago, Sandra ; Almeida, Pedro L. ; Corvo, Marta C. ; De Castro, Baltazar ; Granadeiro, Carlos ; Balula, Salete
Date: 2017
Persistent ID: http://hdl.handle.net/10400.21/7264
Origin: Repositório Científico do Instituto Politécnico de Lisboa
Subject(s): Sulfur-free diesel; Sustainable desulfurization processes; Heterogeneous catalysis; Polyoxometalate; Water extraction solvent
The present work presents a strategic oxidative desulfurization system able to efficiently operate under sustainable conditions, i.e. using an eco-friendly oxidant and without the need of extractive organic solvents. The catalytic performance of Eu(PW11O39)2@aptesSBA-15 was evaluated for the oxidative desulfurization of a multicomponent model diesel using a solvent-free or biphasic systems. The results reveal its remarkable desulfurization performance achieving complete desulfurization after just 2 h of reaction. Moreover, the composite has shown a high recycling ability without loss of catalytic activity for ten consecutive ODS cycles. Interestingly, under solvent-free conditions it was possible to maintain the desulfurization efficiency of the biphasic system while being able to avoid the use of harmful organic solvents. In this case, a successful extraction of oxidized sulfur compounds was found conciliating centrifugation and water as extraction solvent. Therefore, this work reports an important step towards the development of novel eco-sustainable desulfurization systems with high industrial interest.
