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Ionic Liquids in Refinery Desulfurization : Comparison between Biphasic and Supported Ionic Liquid Phase Suspension Processes

Title data

Kuhlmann, Esther ; Haumann, Marco ; Jess, Andreas ; Seeberger, Andreas ; Wasserscheid, Peter:
Ionic Liquids in Refinery Desulfurization : Comparison between Biphasic and Supported Ionic Liquid Phase Suspension Processes.
In: ChemSusChem. Vol. 2 (2009) Issue 10 . - pp. 969-977.
ISSN 1864-564X
DOI: https://doi.org/10.1002/cssc.200900142

Official URL: Volltext

Abstract in another language

The desulfurization of fuel compounds in the presence of ionic liquids is reported. For this purpose, the desulfurization efficiency of a variety of imidazolium phosphate ionic liquids has been tested. Dibenzothiophene/dodecane and butylmercaptan/decane mixtures were used as model systems. Single-stage extractions reduced the sulfur content from 500 ppm to 200 ppm. In multistage extractions the sulfur content could be lowered to less than 10 ppm within seven stages. Regeneration of the ionic liquid was achieved by distillation or re-extraction procedures. Supported ionic liquid phase (SILP) materials, obtained by dispersing the ionic liquid as a thin film on highly porous silica, exhibited a significantly higher extraction performance owing to their larger surface areas, reducing the sulfur content to less than 100 ppm in one stage. Multistage extraction with these SILP materials reduced the sulfur level to 50 ppm in the second stage. The SILP technology offers very efficient utilization of ionic liquids and circumvents mass transport limitations because of the small film thickness and large surface area, and allows application of the simple packed-bed column extraction technique.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: desulfurization; extraction ; ionic liquids; physisorption; supported materials
Institutions of the University: 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
Faculties
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: 02 Feb 2015 10:25
Last Modified: 02 Feb 2015 10:25
URI: https://eref.uni-bayreuth.de/id/eprint/6144