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Deep desulfurization of fuels by extraction with ionic liquids

Title data

Jess, Andreas ; Eßer, Jochen:
Deep desulfurization of fuels by extraction with ionic liquids.
In: ACS Symposium Series. Vol. 902 (2005) . - pp. 83-96.
ISSN 1947-5918

Abstract in another language

In recent years, much attention has been given to deep desulfurization of diesel oil and gasoline, since exhaust gases containing SOx cause air pollution and acid rain. Moreover, a lower sulfur content than today - still several 100 ppm S in many countries - would allow the use of new engines and catalytic systems. Therefore, the S-level in fuels will be drastically decreased in Europe and other countries in 2005 down to at least 50 ppm. The current process of catalytic hydrodesulfurization (HDS) is limited for such ultra-low sulfur fuels, respecttively the expenses are high to meet these future requirements. Alternative processes are therefore desirable. This paper presents a potential alternative, the (reversible) extraction of organic S-compounds by ionic liquids (ILs), e. g. by butylmethylinudazolium(BMIM)-chloroalununate, but also by halogen-free ILs like BMIM-octylsulfate. In the presented experiments, extraction of model oils (dibenzothiophene derivatives mixed with dodecane) as well as of a real diesel oil were investigated. The results show the excellent and selective extraction properties of ILs, especially with regard to those S-compounds, which are very hard to remove by HDS. In addition, organic N-compounds like indole are also extracted with an even much higher efficiency. The application of mild process conditions (ambient pressure and temperature) and the fact that hydrogen is not needed, are additional advantages of this new concept in comparison to HDS. The estimation of the basic parameters of a technical extraction process with ILs will be given.

Further data

Item Type: Article in a journal
Refereed: Yes
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: 13 May 2015 12:16
Last Modified: 02 Mar 2016 14:52
URI: https://eref.uni-bayreuth.de/id/eprint/13307