Partial oxidation of n-hexadecane through decomposition of hydrogen peroxide in supercritical water

Handle URI:
http://hdl.handle.net/10754/599141
Title:
Partial oxidation of n-hexadecane through decomposition of hydrogen peroxide in supercritical water
Authors:
Alshammari, Y.M. ( 0000-0003-2352-941X ) ; Hellgardt, K.
Abstract:
© 2014 The Institution of Chemical Engineers. This work reports the experimental analysis of partial oxidation of n-hexadecane under supercritical water conditions. A novel reactor flow system was developed which allows for total decomposition of hydrogen peroxide in a separate reactor followed partial oxidation of n-hexadecane in a gasification reactor instead of having both reactions in one reactor. The kinetics of hydrothermal decomposition of hydrogen peroxide was studied in order to confirm its full conversion into water and oxygen under the desired partial oxidation conditions, and the kinetic data were found in a good agreement with previously reported literature. The gas yield and gasification efficiency were investigated under different operating parameters. Furthermore, the profile of C-C/C=C ratio was studied which showed the favourable conditions for maximising yields of n-alkanes via hydrogenation of their corresponding 1-alkenes. Enhanced hydrogenation of 1-alkenes was observed at higher O/C ratios and higher residence times, shown by the increase in the C-C/C=C ratio to more than unity, while increasing the temperature has shown much less effect on the C-C/C=C ratio at the current experimental conditions. In addition, GC-MS analysis of liquid samples revealed the formation of heavy oxygenated compounds which may suggest a new addition reaction to account for their formation under the current experimental conditions. Results show new promising routes for hydrogen production with in situ hydrogenation of heavy hydrocarbons in a supercritical water reactor.
Citation:
Alshammari YM, Hellgardt K (2015) Partial oxidation of n-hexadecane through decomposition of hydrogen peroxide in supercritical water. Chemical Engineering Research and Design 93: 565–575. Available: http://dx.doi.org/10.1016/j.cherd.2014.05.025.
Publisher:
Elsevier BV
Journal:
Chemical Engineering Research and Design
Issue Date:
Jan-2015
DOI:
10.1016/j.cherd.2014.05.025
Type:
Article
ISSN:
0263-8762
Sponsors:
Authors would like to thank KAUST and the Saudi Royal Commission for Jubail and Yanbu for sponsoring this project. Mr. Alshammari would also like to thank Prof. Geoffrey Maitland for research guidance and support.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorAlshammari, Y.M.en
dc.contributor.authorHellgardt, K.en
dc.date.accessioned2016-02-25T13:53:38Zen
dc.date.available2016-02-25T13:53:38Zen
dc.date.issued2015-01en
dc.identifier.citationAlshammari YM, Hellgardt K (2015) Partial oxidation of n-hexadecane through decomposition of hydrogen peroxide in supercritical water. Chemical Engineering Research and Design 93: 565–575. Available: http://dx.doi.org/10.1016/j.cherd.2014.05.025.en
dc.identifier.issn0263-8762en
dc.identifier.doi10.1016/j.cherd.2014.05.025en
dc.identifier.urihttp://hdl.handle.net/10754/599141en
dc.description.abstract© 2014 The Institution of Chemical Engineers. This work reports the experimental analysis of partial oxidation of n-hexadecane under supercritical water conditions. A novel reactor flow system was developed which allows for total decomposition of hydrogen peroxide in a separate reactor followed partial oxidation of n-hexadecane in a gasification reactor instead of having both reactions in one reactor. The kinetics of hydrothermal decomposition of hydrogen peroxide was studied in order to confirm its full conversion into water and oxygen under the desired partial oxidation conditions, and the kinetic data were found in a good agreement with previously reported literature. The gas yield and gasification efficiency were investigated under different operating parameters. Furthermore, the profile of C-C/C=C ratio was studied which showed the favourable conditions for maximising yields of n-alkanes via hydrogenation of their corresponding 1-alkenes. Enhanced hydrogenation of 1-alkenes was observed at higher O/C ratios and higher residence times, shown by the increase in the C-C/C=C ratio to more than unity, while increasing the temperature has shown much less effect on the C-C/C=C ratio at the current experimental conditions. In addition, GC-MS analysis of liquid samples revealed the formation of heavy oxygenated compounds which may suggest a new addition reaction to account for their formation under the current experimental conditions. Results show new promising routes for hydrogen production with in situ hydrogenation of heavy hydrocarbons in a supercritical water reactor.en
dc.description.sponsorshipAuthors would like to thank KAUST and the Saudi Royal Commission for Jubail and Yanbu for sponsoring this project. Mr. Alshammari would also like to thank Prof. Geoffrey Maitland for research guidance and support.en
dc.publisherElsevier BVen
dc.subjectGasification efficiencyen
dc.subjectHydrothermal conditionsen
dc.subjectIn situ hydrogenationen
dc.subjectPartial oxidationen
dc.subjectSupercritical wateren
dc.subjectWater gas shift reactionen
dc.titlePartial oxidation of n-hexadecane through decomposition of hydrogen peroxide in supercritical wateren
dc.typeArticleen
dc.identifier.journalChemical Engineering Research and Designen
dc.contributor.institutionImperial College London, London, United Kingdomen
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