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Fundamental insights into the effect of blending hydrogen flames with sooting biofuels.

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Title: Fundamental insights into the effect of blending hydrogen flames with sooting biofuels.
Authors: Yin, Yilong1 (AUTHOR) yilong.yin@adelaide.edu.au, Medwell, Paul R.1 (AUTHOR), Gee, Adam J.1 (AUTHOR), Foo, Kae Ken1 (AUTHOR), Dally, Bassam B.2 (AUTHOR)
Source: Fuel (0016-2361). Jan2023:Part 1, Vol. 331, pN.PAG-N.PAG. 1p.
Subjects: Soot, Hydrogen flames, Biomass energy, Heat radiation & absorption, Flame, Heat transfer, Molarity
Abstract: A major challenge to using hydrogen as a carbon-free energy carrier to replace fossil fuels in high-temperature practical processes is the reduced thermal radiative transfer of hydrogen flames due to the absence of soot. To address the potential issue of low radiative heat transfer from hydrogen flames, the effect of blending highly sooting biofuels to turbulent nonpremixed hydrogen-based flames on flame luminosity and radiant heat flux enhancement is investigated in this paper. The sooting propensities of aromatic bio-oil surrogates (toluene, anisole and guaiacol) and monoterpene essential oil surrogates (eucalyptol and D-limonene) are evaluated. The Threshold Sooting Index (TSI) and Oxygen Extended Sooting Index (OESI) are calculated and compared with the data sets in the literature. The sooting propensities of the reported fuels are found to follow a decreasing order: aromatics > monoterpenes > alkenes > alkanes > aldehydes. The effect of chemical structure and functional group on sooting propensity tends to be more significant than the oxygen content and effective C/H ratio. Turbulent nonpremixed hydrogen–nitrogen (9:1 mol) jet flames are blended with 0.2 and 1 mol% (based on the molar concentration of hydrogen) vapourised biofuels. The results show that adding 0.2 and 1 mol% vapourised biofuels to the hydrogen-based flame non-linearly improves the flame luminosity and radiant fraction by 61%–253% and 2%–19%, respectively. Toluene is the most effective additive in luminosity and radiant fraction enhancement among all tested biofuels. Adding biofuels with an aromatic structure increases the radiant fraction by 10%–19%, which is more effective than cyclic monoterpenes (2%–9%). Adding non-oxygenated biofuels generally have larger increases in radiant fraction (9%–19%) than oxygenated biofuels (2%–10%). • Sooting propensity: aromatics > monoterpenes > alkenes > alkanes > aldehydes. • 0.2 and 1 mol% vapourised biofuels increase H 2 /N 2 flame radiation by 2%–19%. • 0.2 and 1 mol% vapourised biofuels increase H 2 /N 2 flame luminosity by 61%–253%. • Effectiveness of H 2 /N 2 flame radiation enhancement: aromatic biofuel > monoterpene. • Effectiveness of H 2 /N 2 flame radiation enhancement: non-oxygenates > oxygenates. [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: 159569292
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Fundamental insights into the effect of blending hydrogen flames with sooting biofuels.
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  Data: <searchLink fieldCode="AR" term="%22Yin%2C+Yilong%22">Yin, Yilong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yilong.yin@adelaide.edu.au</i><br /><searchLink fieldCode="AR" term="%22Medwell%2C+Paul+R%2E%22">Medwell, Paul R.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gee%2C+Adam+J%2E%22">Gee, Adam J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Foo%2C+Kae+Ken%22">Foo, Kae Ken</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dally%2C+Bassam+B%2E%22">Dally, Bassam B.</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Fuel+%280016-2361%29%22">Fuel (0016-2361)</searchLink>. Jan2023:Part 1, Vol. 331, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Soot%22">Soot</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+flames%22">Hydrogen flames</searchLink><br /><searchLink fieldCode="DE" term="%22Biomass+energy%22">Biomass energy</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+radiation+%26+absorption%22">Heat radiation & absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Flame%22">Flame</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Molarity%22">Molarity</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: A major challenge to using hydrogen as a carbon-free energy carrier to replace fossil fuels in high-temperature practical processes is the reduced thermal radiative transfer of hydrogen flames due to the absence of soot. To address the potential issue of low radiative heat transfer from hydrogen flames, the effect of blending highly sooting biofuels to turbulent nonpremixed hydrogen-based flames on flame luminosity and radiant heat flux enhancement is investigated in this paper. The sooting propensities of aromatic bio-oil surrogates (toluene, anisole and guaiacol) and monoterpene essential oil surrogates (eucalyptol and D-limonene) are evaluated. The Threshold Sooting Index (TSI) and Oxygen Extended Sooting Index (OESI) are calculated and compared with the data sets in the literature. The sooting propensities of the reported fuels are found to follow a decreasing order: aromatics > monoterpenes > alkenes > alkanes > aldehydes. The effect of chemical structure and functional group on sooting propensity tends to be more significant than the oxygen content and effective C/H ratio. Turbulent nonpremixed hydrogen–nitrogen (9:1 mol) jet flames are blended with 0.2 and 1 mol% (based on the molar concentration of hydrogen) vapourised biofuels. The results show that adding 0.2 and 1 mol% vapourised biofuels to the hydrogen-based flame non-linearly improves the flame luminosity and radiant fraction by 61%–253% and 2%–19%, respectively. Toluene is the most effective additive in luminosity and radiant fraction enhancement among all tested biofuels. Adding biofuels with an aromatic structure increases the radiant fraction by 10%–19%, which is more effective than cyclic monoterpenes (2%–9%). Adding non-oxygenated biofuels generally have larger increases in radiant fraction (9%–19%) than oxygenated biofuels (2%–10%). • Sooting propensity: aromatics > monoterpenes > alkenes > alkanes > aldehydes. • 0.2 and 1 mol% vapourised biofuels increase H 2 /N 2 flame radiation by 2%–19%. • 0.2 and 1 mol% vapourised biofuels increase H 2 /N 2 flame luminosity by 61%–253%. • Effectiveness of H 2 /N 2 flame radiation enhancement: aromatic biofuel > monoterpene. • Effectiveness of H 2 /N 2 flame radiation enhancement: non-oxygenates > oxygenates. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  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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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.fuel.2022.125618
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Soot
        Type: general
      – SubjectFull: Hydrogen flames
        Type: general
      – SubjectFull: Biomass energy
        Type: general
      – SubjectFull: Heat radiation & absorption
        Type: general
      – SubjectFull: Flame
        Type: general
      – SubjectFull: Heat transfer
        Type: general
      – SubjectFull: Molarity
        Type: general
    Titles:
      – TitleFull: Fundamental insights into the effect of blending hydrogen flames with sooting biofuels.
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            NameFull: Yin, Yilong
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            NameFull: Medwell, Paul R.
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            NameFull: Gee, Adam J.
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            NameFull: Foo, Kae Ken
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            NameFull: Dally, Bassam B.
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          Dates:
            – D: 01
              M: 01
              Text: Jan2023:Part 1
              Type: published
              Y: 2023
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              Value: 00162361
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            – Type: volume
              Value: 331
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            – TitleFull: Fuel (0016-2361)
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