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., Balula, S. S., & 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