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Optimization of oxidative desulfurization of Malaysian Euro II diesel fuel utilizing tert-butyl hydroperoxide–dimethylformamide system.

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Title: Optimization of oxidative desulfurization of Malaysian Euro II diesel fuel utilizing tert-butyl hydroperoxide–dimethylformamide system.
Authors: Mokhtar, Wan Nur Aini Wan1, Bakar, Wan Azelee Wan Abu1 wazelee@kimia.fs.utm.my, Ali, Rusmidah1, Kadir, Abdul Aziz Abdul2
Source: Fuel (0016-2361). Dec2015, Vol. 161, p26-33. 8p.
Subjects: Desulfurization, Process optimization, Diesel fuels, Hydroperoxides, Dimethylformamide
Abstract: Deep oxidative desulfurization of model diesel consisting of thiophene, dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) was investigated with various oxidants followed by extraction step using dimethylformamide (DMF). Response surface methodology based on Box–Behnken design was used to evaluate the effects of the main operating parameters, including the oxidant to sulfur molar ratio (2.0–4.0), oxidation temperature (40–60 °C) and oxidation time (10–60 min), on the 4,6-dimethyldibenzothiophene conversion. Among the oxidants used; tert -butyl hydroperoxide (TBHP) was led to the highest oxidation of model sulfur compounds. Meanwhile, the statistical results revealed that TBHP/sulfur ratio was the most important parameter followed by oxidation time and oxidation temperature. The optimum oxidative desulfurization conditions for 4,6-DMDBT conversion had been attained at TBHP/sulfur ratio of 3.0, temperature of 48 °C and period time of 31 min, respectively with the highest conversion of 4,6-DMDBT of 84.5%. The experimental optimum yield fitted-well with the predicted value with less than 5% error. The mechanistic study showed that the reaction between TBHP and 4,6-DMDBT was efficient to produce corresponding sulfoxide, instead of sulfone compound. [ABSTRACT FROM AUTHOR]
Copyright of Fuel (0016-2361) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 109553008
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Optimization of oxidative desulfurization of Malaysian Euro II diesel fuel utilizing tert-butyl hydroperoxide–dimethylformamide system.
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  Data: <searchLink fieldCode="JN" term="%22Fuel+%280016-2361%29%22">Fuel (0016-2361)</searchLink>. Dec2015, Vol. 161, p26-33. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Desulfurization%22">Desulfurization</searchLink><br /><searchLink fieldCode="DE" term="%22Process+optimization%22">Process optimization</searchLink><br /><searchLink fieldCode="DE" term="%22Diesel+fuels%22">Diesel fuels</searchLink><br /><searchLink fieldCode="DE" term="%22Hydroperoxides%22">Hydroperoxides</searchLink><br /><searchLink fieldCode="DE" term="%22Dimethylformamide%22">Dimethylformamide</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Deep oxidative desulfurization of model diesel consisting of thiophene, dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) was investigated with various oxidants followed by extraction step using dimethylformamide (DMF). Response surface methodology based on Box–Behnken design was used to evaluate the effects of the main operating parameters, including the oxidant to sulfur molar ratio (2.0–4.0), oxidation temperature (40–60 °C) and oxidation time (10–60 min), on the 4,6-dimethyldibenzothiophene conversion. Among the oxidants used; tert -butyl hydroperoxide (TBHP) was led to the highest oxidation of model sulfur compounds. Meanwhile, the statistical results revealed that TBHP/sulfur ratio was the most important parameter followed by oxidation time and oxidation temperature. The optimum oxidative desulfurization conditions for 4,6-DMDBT conversion had been attained at TBHP/sulfur ratio of 3.0, temperature of 48 °C and period time of 31 min, respectively with the highest conversion of 4,6-DMDBT of 84.5%. The experimental optimum yield fitted-well with the predicted value with less than 5% error. The mechanistic study showed that the reaction between TBHP and 4,6-DMDBT was efficient to produce corresponding sulfoxide, instead of sulfone compound. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Fuel (0016-2361) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.fuel.2015.08.031
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 26
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      – SubjectFull: Desulfurization
        Type: general
      – SubjectFull: Process optimization
        Type: general
      – SubjectFull: Diesel fuels
        Type: general
      – SubjectFull: Hydroperoxides
        Type: general
      – SubjectFull: Dimethylformamide
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      – TitleFull: Optimization of oxidative desulfurization of Malaysian Euro II diesel fuel utilizing tert-butyl hydroperoxide–dimethylformamide system.
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            NameFull: Mokhtar, Wan Nur Aini Wan
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            NameFull: Bakar, Wan Azelee Wan Abu
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            NameFull: Ali, Rusmidah
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            NameFull: Kadir, Abdul Aziz Abdul
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            – D: 01
              M: 12
              Text: Dec2015
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              Y: 2015
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