Catalyst activation and influence of the oil matrix on the extractive oxidative desulfurization using aqueous polyoxometalate solutions and molecular oxygen

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Details zur Publikation

Autor(en): Bertleff B, Claußnitzer J, Korth W, Wasserscheid P, Jess A, Albert J
Zeitschrift: ACS Catalysis
Jahr der Veröffentlichung: 2018
ISSN: 2155-5435


Abstract

Our contribution describes the oxidative desulfurization of dibenzothiophene (DBT) from model oils using an aqueous H8PV5Mo7O40
(HPA-5) catalyst solution and molecular oxygen as the oxidant. In
contrast to common oxidative desulfurization (ODS) protocols, the
organic sulfur compound DBT is oxidized to water-soluble compounds, such
as sulfuric acid (50–55%), sulfoacetic acid (20–25%), and sulfobenzoic
acid (25–30%), which are extracted in situ into the aqueous
catalyst phase. We describe the activating effect of oxalic acid on the
ODS performance of the catalyst and propose a mechanism for the catalyst
activation. Moreover, we report on the influence of various organic
solvents, i.e., n-alkanes and aromatics, on the oxidative DBT
removal. Remarkably, the rate of DBT oxidation and removal enhances with
an increasing chain length of the alkane matrix, whereas aromatic
compounds in the oil matrix inhibit the desulfurization rate. Moreover,
we demonstrate that the aqueous catalyst phase can be reused at least 5
times without loss in catalytic performance.


FAU-Autoren / FAU-Herausgeber

Albert, Jakob Dr.-Ing.
Lehrstuhl für Chemische Reaktionstechnik
Bertleff, Benjamin
Lehrstuhl für Chemische Reaktionstechnik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik


Zitierweisen

APA:
Bertleff, B., Claußnitzer, J., Korth, W., Wasserscheid, P., Jess, A., & Albert, J. (2018). Catalyst activation and influence of the oil matrix on the extractive oxidative desulfurization using aqueous polyoxometalate solutions and molecular oxygen. ACS Catalysis. https://dx.doi.org/10.1021/acs.energyfuels.8b01514

MLA:
Bertleff, Benjamin, et al. "Catalyst activation and influence of the oil matrix on the extractive oxidative desulfurization using aqueous polyoxometalate solutions and molecular oxygen." ACS Catalysis (2018).

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Zuletzt aktualisiert 2018-15-10 um 15:08