Desulfurization Process Conciliating Heterogeneous Oxidation and Liquid Extraction

Organic Solvent or Centrifugation/Water?

Susana O. Ribeiro, Lucie S. Nogueira, Sandra Gago, Marta C. Corvo, Baltazar de Castro, Carlos M. Granadeiro, Salete S. Balula, Pedro L. Almeida

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)359-367
Number of pages9
JournalApplied Catalysis A-General
Volume542
DOIs
Publication statusPublished - 25 Jul 2017

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Keywords

  • Sulfur-free diesel
  • Sustainable desulfurization processes
  • Heterogeneous catalysis
  • Polyoxometalate
  • Water extraction solvent

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