Numerical investigation of counter-flow diffusion flame of biogas–hydrogen blends: Effects of biogas composition, hydrogen enrichment and scalar dissipation rate on flame structure and emissions.
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| Title: | Numerical investigation of counter-flow diffusion flame of biogas–hydrogen blends: Effects of biogas composition, hydrogen enrichment and scalar dissipation rate on flame structure and emissions. |
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| Authors: | Mameri, Abdelbaki1, Tabet, Fouzi2 fouzi.tabet@dbfz.de |
| Source: | International Journal of Hydrogen Energy. Jan2016, Vol. 41 Issue 3, p2011-2022. 12p. |
| Subjects: | Diffusion, Biogas, Energy dissipation, Flame, Numerical analysis, Atmospheric pressure |
| Abstract: | This study addresses numerically the influence of several operating conditions on the structure and NO emissions of a biogas diffusion flame. The analysis is conducted at atmospheric pressure in counter-flow configuration and mixture fraction space. CO 2 volume in biogas is varied from 25% to 60%, H 2 enrichment from 0% to 20% and the scalar dissipation rate from near equilibrium to near extinction. Particular attention is paid to CO 2 chemical effect. CO 2 contained in biogas can have chemical effects when it participates in chemical reactions and thermal effects when it acts like a pure diluent. Chemical effects of CO 2 are elucidated by using the inert species technique. Flame structure is characterized by solving flamelet equations with the consideration of radiation and detailed chemistry. It is observed that flame properties are very sensitive to biogas composition, hydrogen addition and scalar dissipation rate. CO 2 increment decreases flame temperature, mass fraction of chain carrier radicals and NO emission index. Blending biogas with hydrogen increases the mixture heating value and makes the fuel more reactive. Hence, chain carrier radicals and NO index emission are all increased. The chemical effect of CO 2 is found to be present overall scalar dissipation rate values where it reduces the maxima of temperature and OH mass fraction and increases the maxima of CO and NO mass fractions. H 2 enrichment has a weak influence on CO 2 chemical effect. Hydrogen-rich biogas flames produce less NO at high scalar dissipation rates. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science 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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 112347317 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Numerical investigation of counter-flow diffusion flame of biogas–hydrogen blends: Effects of biogas composition, hydrogen enrichment and scalar dissipation rate on flame structure and emissions. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Mameri%2C+Abdelbaki%22">Mameri, Abdelbaki</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Tabet%2C+Fouzi%22">Tabet, Fouzi</searchLink><relatesTo>2</relatesTo><i> fouzi.tabet@dbfz.de</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Jan2016, Vol. 41 Issue 3, p2011-2022. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Diffusion%22">Diffusion</searchLink><br /><searchLink fieldCode="DE" term="%22Biogas%22">Biogas</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink><br /><searchLink fieldCode="DE" term="%22Flame%22">Flame</searchLink><br /><searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+pressure%22">Atmospheric pressure</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study addresses numerically the influence of several operating conditions on the structure and NO emissions of a biogas diffusion flame. The analysis is conducted at atmospheric pressure in counter-flow configuration and mixture fraction space. CO 2 volume in biogas is varied from 25% to 60%, H 2 enrichment from 0% to 20% and the scalar dissipation rate from near equilibrium to near extinction. Particular attention is paid to CO 2 chemical effect. CO 2 contained in biogas can have chemical effects when it participates in chemical reactions and thermal effects when it acts like a pure diluent. Chemical effects of CO 2 are elucidated by using the inert species technique. Flame structure is characterized by solving flamelet equations with the consideration of radiation and detailed chemistry. It is observed that flame properties are very sensitive to biogas composition, hydrogen addition and scalar dissipation rate. CO 2 increment decreases flame temperature, mass fraction of chain carrier radicals and NO emission index. Blending biogas with hydrogen increases the mixture heating value and makes the fuel more reactive. Hence, chain carrier radicals and NO index emission are all increased. The chemical effect of CO 2 is found to be present overall scalar dissipation rate values where it reduces the maxima of temperature and OH mass fraction and increases the maxima of CO and NO mass fractions. H 2 enrichment has a weak influence on CO 2 chemical effect. Hydrogen-rich biogas flames produce less NO at high scalar dissipation rates. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science 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.ijhydene.2015.11.035 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 2011 Subjects: – SubjectFull: Diffusion Type: general – SubjectFull: Biogas Type: general – SubjectFull: Energy dissipation Type: general – SubjectFull: Flame Type: general – SubjectFull: Numerical analysis Type: general – SubjectFull: Atmospheric pressure Type: general Titles: – TitleFull: Numerical investigation of counter-flow diffusion flame of biogas–hydrogen blends: Effects of biogas composition, hydrogen enrichment and scalar dissipation rate on flame structure and emissions. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Mameri, Abdelbaki – PersonEntity: Name: NameFull: Tabet, Fouzi IsPartOfRelationships: – BibEntity: Dates: – D: 21 M: 01 Text: Jan2016 Type: published Y: 2016 Identifiers: – Type: issn-print Value: 03603199 Numbering: – Type: volume Value: 41 – Type: issue Value: 3 Titles: – TitleFull: International Journal of Hydrogen Energy Type: main |
| ResultId | 1 |
