Thiophene extraction from n-heptane and n-octane using ionic liquids

Kleiweg, Anne-Jan (2020) Thiophene extraction from n-heptane and n-octane using ionic liquids. Master's Thesis / Essay, Chemical Engineering.

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Abstract

The viability of the removal of thiophene from an n-heptane/n-octane mixture using extraction with ionic liquids, as a replacement of sulfolane, is explored in this master thesis. The mixture is a simple model for fuel desulfurization, with the goal to reduce the thiophene content to 10 ppm, from 520 ppm. The ionic liquids, [EMIM][MeSO3] and [EIM][NO3] are chosen using an extensive Matlab screening program, which employs infinite dilution activity coefficients. Subsequent experimental work obtained liquid-liquid equilibria data, which were used to regress NRTL parameters. With the NRTL values, as well as other property data, both theoretical process design and process design in Aspen Plus was done. Other property data includes viscosity, surface tension, heat capacity, thermal conductivity, critical properties, acentric factor and density. Using the results of this design it was concluded that, although [EMIM][MeSO3] has better extractive properties, [EIM][NO3] is the better option for this particular process. This is mostly due to its lower boiling point, greatly reducing utility costs. Moreover, it was concluded that both ionic liquids were a suitable replacement for sulfolane.

Item Type:	Thesis (Master's Thesis / Essay)
Supervisor name:	Picchioni, F. and Winkelman, J.G.M.
Degree programme:	Chemical Engineering
Thesis type:	Master's Thesis / Essay
Language:	English
Date Deposited:	01 Sep 2020 13:46
Last Modified:	01 Sep 2020 13:46
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/23236

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