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(PW11039)(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.
- Sulfur-free diesel
- Sustainable desulfurization processes
- Heterogeneous catalysis
- Water extraction solvent
Ribeiro, S. O., Nogueira, L. S., Gago, S., Corvo, M. C., de Castro, B., Granadeiro, C. M., ... Almeida, P. L. (2017). Desulfurization Process Conciliating Heterogeneous Oxidation and Liquid Extraction: Organic Solvent or Centrifugation/Water? Applied Catalysis A-General, 542, 359-367. https://doi.org/10.1016/j.apcata.2017.05.032