Extraction coupled oxidative desulfurization of fuels to sulfate and water-soluble sulfur compounds using polyoxometalate catalysts and molecular oxygen

Albert J, Wasserscheid P, Bertleff B, Claußnitzer J, Korth W, Jess A (2017)

Publication Type: Journal article

Publication year: 2017

Journal

ACS Sustainable Chemistry & Engineering American Chemical Society

DOI: 10.1021/acssuschemeng.7b00087

Abstract

Our contribution demonstrates a new way of fuel desulfurization, namely selective oxidation of organic S-compounds present in fuels to water-soluble sulfur compounds followed by in situ extraction of the latter into an aqueous phase. Different from common oxidative desulfurization (ODS) processes, we demonstrate a technique that converts sulfur compounds in fuel to a large extent to sulfate (60--70%) using oxygen as the oxidant and an aqueous H8PV5Mo7O40 (HPA-5) solution as the catalyst phase. Other water-soluble desulfurization products are sulfoacetic acid (SAA) with a share of 10--20%, 2-sulfobenzoic acid (2-SBA), and 2-(sulfooxy)benzoic acid (2-SOBA), the latter two with a share of <10%. The new desulfurization method has been optimized for removing benzothiophene from isooctane, giving the best results with a degree of desulfurization of 99% applying 120 °C, 20 bar oxygen pressure, and 1000 rpm of 6 h reaction time using a volume water/oil ration of 10/1. Furthermore, we also successfully demonstrated the desulfurization of a domestic fuel oil with 973 ppmw sulfur content with a degree of desulfurization of 28% under nonoptimized conditions.

Authors with CRIS profile

Jakob Albert Lehrstuhl für Chemische Reaktionstechnik Peter Wasserscheid Lehrstuhl für Chemische Reaktionstechnik Benjamin Bertleff Lehrstuhl für Chemische Reaktionstechnik

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials

Involved external institutions

Universität Bayreuth DE Germany (DE)

How to cite

APA:

Albert, J., Wasserscheid, P., Bertleff, B., Claußnitzer, J., Korth, W., & Jess, A. (2017). Extraction coupled oxidative desulfurization of fuels to sulfate and water-soluble sulfur compounds using polyoxometalate catalysts and molecular oxygen. ACS Sustainable Chemistry & Engineering. https://dx.doi.org/10.1021/acssuschemeng.7b00087

MLA:

Albert, Jakob, et al. "Extraction coupled oxidative desulfurization of fuels to sulfate and water-soluble sulfur compounds using polyoxometalate catalysts and molecular oxygen." ACS Sustainable Chemistry & Engineering (2017).

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