Investigations on catalyst stability and product isolation in the extractive oxidative desulfurization of fuels using polyoxometalates and molecular oxygen

Beitrag in einer Fachzeitschrift
(Online-Publikation)


Details zur Publikation

Autor(en): Bertleff B, Claußnitzer J, Goebel R, Korth W, Skiborowski M, Wasserscheid P, Jess A, Albert J
Zeitschrift: ChemCatChem
Jahr der Veröffentlichung: 2018
ISSN: 1867-3899


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.


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


Autor(en) der externen Einrichtung(en)
Universität Bayreuth


Zitierweisen

APA:
Bertleff, B., Claußnitzer, J., Goebel, R., Korth, W., Skiborowski, M., Wasserscheid, P.,... Albert, J. (2018). Investigations on catalyst stability and product isolation in the extractive oxidative desulfurization of fuels using polyoxometalates and molecular oxygen. ChemCatChem. https://dx.doi.org/10.1002/cctc.201801081

MLA:
Bertleff, Benjamin, et al. "Investigations on catalyst stability and product isolation in the extractive oxidative desulfurization of fuels using polyoxometalates and molecular oxygen." ChemCatChem (2018).

BibTeX: 

Zuletzt aktualisiert 2018-15-10 um 15:08