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Investigations on Catalyst Stability and Product Isolation in the Extractive Oxidative Desulfurization of Fuels Using Polyoxometalates and Molecular Oxygen

Title data

Bertleff, Benjamin ; Goebel, Rebecca ; Claußnitzer, Johannes ; Korth, Wolfgang ; Skiborowski, Mirko ; Wasserscheid, Peter ; Jess, Andreas ; Albert, Jakob:
Investigations on Catalyst Stability and Product Isolation in the Extractive Oxidative Desulfurization of Fuels Using Polyoxometalates and Molecular Oxygen.
In: ChemCatChem. Vol. 10 (23 October 2018) Issue 20 . - pp. 4602-4609.
ISSN 1867-3899
DOI: https://doi.org/10.1002/cctc.201801081

Abstract in another language

Abstract Our contribution adds important new insight to the recent finding that polyoxometalate catalysts, such as H₈PV₅Mo₇O₄0 (HPA-5), are very effective catalysts in the extractive oxidative desulfurization of fuels using molecular oxygen. Our contribution focuses on aspects of catalyst stability and deactivation caused by the accumulation of acidic products and intermediates, i.e. sulfuric acid, formic acid, acetic acid, sulfoacetic acid or 2-sulfobenzoic acid. These compounds reduce the pH value of the aqueous catalyst phase during the course of the desulfurization reaction. At lower pH values, the higher V-substituted species rearrange to lower V-substituted species and VO₂+. This rearrangement is responsible for a decreasing activity in extractive oxidative desulfurization. We show that formic acid, acetic acid, sulfoacetic acid and 2-sulfobenzoic acid block active sites of the catalyst. Oxalic acid, in contrast, has been found to exert a remarkable positive effect on catalyst activity. The feasibility of catalyst recycling and efficient isolation of the decomposition products is demonstrated using four commercially available organic solvent nanofiltration membranes.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Molecular oxygen
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Chemical Engineering
Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Research Institutions
Research Institutions > Research Units
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 12 Dec 2018 11:50
Last Modified: 14 Dec 2018 08:09
URI: https://eref.uni-bayreuth.de/id/eprint/45844