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Received June 11, 2012
Accepted November 5, 2012
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Extraction conditions for removal of oxidized sulfur compounds in gas oil
Department of Chemical Petroleum Engineering, Sharif University of Technology, Tehran, Iran 1Refining Technology Development Division, Research Institute of Petroleum Industry, Tehran, Iran
safekordi@sharif.edu
Korean Journal of Chemical Engineering, March 2013, 30(3), 700-705(6), 10.1007/s11814-012-0192-z
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Abstract
An experimental study was conducted to investigate the extraction of oxidized sulfur compounds from gas oil. Solvents used for this purpose included acetone, acetonitrile, methanol and propanol. The effect of solvent concentration, solvent to gas oil ratio, temperature, time and number of stages was studied. To select the best solvent and conditions for extraction, two criteria were considered: high desulfurization and more hydrocarbon recovery. Results showed that extraction time and temperature have no significant effect. Methanol for low ability of extraction of oxidized sulfur compounds and propanol for low hydrocarbon recovery were excluded from further experiments. After the tests, the optimum conditions for extraction were determined to be 85% acetone, solvent/feed ratio of 1, two stages extraction in ambient temperature and enough time for mixing. In this condition 85% of sulfur compounds of gas oil containing 1,670 ppmw S were separated and 95% of gas oil was recovered.
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References
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