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Supercritical Water desulfurization of crude oil

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dc.contributor.advisor William H. Green. en_US Kida, Yuko en_US
dc.contributor.other Massachusetts Institute of Technology. Department of Chemical Engineering. en_US 2014-08-19T17:36:39Z 2014-08-19T17:36:39Z 2014 en_US 2014 en_US
dc.description Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 2014. en_US
dc.description Cataloged from PDF version of thesis. en_US
dc.description Includes bibliographical references. en_US
dc.description.abstract Supercritical Water (SCW) desulfurization was investigated for both model sulfur compounds and Arab Heavy crude. In part 1, the reactions of alkyl sulfides in SCW were studied. During hexyl sulfide decomposition in SCW, pentane and CO+CO₂ were detected in addition to the expected six-carbon products. A multi-step reaction sequence for hexyl sulfide reacting with SCW is proposed which explains the surprising products. Intermediate studies were performed to confirm that the key intermediate hexanal forms and rapidly decomposes to pentane and CO. In part 2, Arab Heavy crude was treated with SCW and analyzed with comprehensive gas chromatography (GCxGC) coupled with two detectors, sulfur chemiluminescence detector (SCD) and a flame ionization detector (FID). SCD is a sulfur specific detector that allowed detailed analysis of the reactions that occur during SCW treatment of real fuel mixtures. It was shown that SCW treatment had two effects on sulfur compounds: cracking of heavy sulfur compounds into smaller compounds, mainly benzothiophenes (BT) and dibenziophenes (DBT), and cracking of long alkyl chains on these BTs and DBTs causing a shift to lower molecular weight BTs and DBTs. SCW was found to be ineffective in breaking the stable aromatic rings of these thiophenic compounds. Work in this thesis shed light into molecular level reactions during SCW treatment rather than changes in bulk properties which are often reported in work in the field of SCW desulfurization. en_US
dc.description.statementofresponsibility by Yuko Kida. en_US
dc.format.extent 105 pages en_US
dc.language.iso eng en_US
dc.publisher Massachusetts Institute of Technology en_US
dc.rights M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. en_US
dc.rights.uri en_US
dc.subject Chemical Engineering. en_US
dc.title Supercritical Water desulfurization of crude oil en_US
dc.title.alternative SCW desulfurization of crude oil en_US
dc.type Thesis en_US Ph. D. en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Chemical Engineering. en_US
dc.identifier.oclc 883661237 en_US

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