Experimental and Modeling Studies on the Correlation Between Auto-Ignition Delays and the Methane Number of Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG)
Liquefied natural gas (LNG) and liquefied biogas (LBG) as transport fuels constitute one of the pillars of the European clean fuel strategy. LNG and LBG often contain higher hydrocarbons up to C5, which leads to more complex ignition properties when utilizing them in gas engines. Therefore, it is es...
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Frontiers Media S.A.
2020-07-01
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| Series: | Frontiers in Mechanical Engineering |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fmech.2020.00047/full |
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| author | Bo Shu Sonal K. Vallabhuni Jiaxin Zheng Jiaxin Zheng Sumit Agarwal Ravi X. Fernandes Ravi X. Fernandes |
| author_facet | Bo Shu Sonal K. Vallabhuni Jiaxin Zheng Jiaxin Zheng Sumit Agarwal Ravi X. Fernandes Ravi X. Fernandes |
| author_sort | Bo Shu |
| collection | DOAJ |
| description | Liquefied natural gas (LNG) and liquefied biogas (LBG) as transport fuels constitute one of the pillars of the European clean fuel strategy. LNG and LBG often contain higher hydrocarbons up to C5, which leads to more complex ignition properties when utilizing them in gas engines. Therefore, it is essential to understand their combustion behavior and to quantify the abnormal combustion such as knocking propensity in correlation to the methane number (MN). Currently, there is no traceable standard to define the MN, and the literature algorithms give no consistent results for the same LNG/LBG mixtures. In this study, the correlation between the MN and ignition delays of several LNG/LGB mixtures containing C1-C5 alkanes and nitrogen was investigated at temperatures between 870 and 1,550 K, at 10, 20, and 40 bar, and with equivalence ratios of 0.4 and 1.2. Good correlations have been observed for mixtures with MN 50–90 at high temperatures. At intermediate temperatures, discrepancies were found between mixtures with same MN but different C1-C3 compositions. Moreover, the addition of butane and propane isomers at low vol.% showed no effect on the ignition delay times (IDTs) at intermediate temperatures. |
| first_indexed | 2024-12-10T23:26:56Z |
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| id | doaj.art-46e353dd66d14d45b9e4a3b08cf84d9a |
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| issn | 2297-3079 |
| language | English |
| last_indexed | 2024-12-10T23:26:56Z |
| publishDate | 2020-07-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Mechanical Engineering |
| spelling | doaj.art-46e353dd66d14d45b9e4a3b08cf84d9a2022-12-22T01:29:32ZengFrontiers Media S.A.Frontiers in Mechanical Engineering2297-30792020-07-01610.3389/fmech.2020.00047538170Experimental and Modeling Studies on the Correlation Between Auto-Ignition Delays and the Methane Number of Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG)Bo Shu0Sonal K. Vallabhuni1Jiaxin Zheng2Jiaxin Zheng3Sumit Agarwal4Ravi X. Fernandes5Ravi X. Fernandes6Department of Physical Chemistry, Physikalisch-Technische Bundesanstalt, Braunschweig, GermanyDepartment of Physical Chemistry, Physikalisch-Technische Bundesanstalt, Braunschweig, GermanyDepartment of Physical Chemistry, Physikalisch-Technische Bundesanstalt, Braunschweig, GermanyInstitute of Internal Combustion Engines, Technical University of Braunschweig, Braunschweig, GermanyDepartment of Physical Chemistry, Physikalisch-Technische Bundesanstalt, Braunschweig, GermanyDepartment of Physical Chemistry, Physikalisch-Technische Bundesanstalt, Braunschweig, GermanyInstitute of Internal Combustion Engines, Technical University of Braunschweig, Braunschweig, GermanyLiquefied natural gas (LNG) and liquefied biogas (LBG) as transport fuels constitute one of the pillars of the European clean fuel strategy. LNG and LBG often contain higher hydrocarbons up to C5, which leads to more complex ignition properties when utilizing them in gas engines. Therefore, it is essential to understand their combustion behavior and to quantify the abnormal combustion such as knocking propensity in correlation to the methane number (MN). Currently, there is no traceable standard to define the MN, and the literature algorithms give no consistent results for the same LNG/LBG mixtures. In this study, the correlation between the MN and ignition delays of several LNG/LGB mixtures containing C1-C5 alkanes and nitrogen was investigated at temperatures between 870 and 1,550 K, at 10, 20, and 40 bar, and with equivalence ratios of 0.4 and 1.2. Good correlations have been observed for mixtures with MN 50–90 at high temperatures. At intermediate temperatures, discrepancies were found between mixtures with same MN but different C1-C3 compositions. Moreover, the addition of butane and propane isomers at low vol.% showed no effect on the ignition delay times (IDTs) at intermediate temperatures.https://www.frontiersin.org/article/10.3389/fmech.2020.00047/fullliquefied natural gasliquefied biogasrapid compression machineauto-ignition delayschemical kineticsmodeling |
| spellingShingle | Bo Shu Sonal K. Vallabhuni Jiaxin Zheng Jiaxin Zheng Sumit Agarwal Ravi X. Fernandes Ravi X. Fernandes Experimental and Modeling Studies on the Correlation Between Auto-Ignition Delays and the Methane Number of Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG) Frontiers in Mechanical Engineering liquefied natural gas liquefied biogas rapid compression machine auto-ignition delays chemical kinetics modeling |
| title | Experimental and Modeling Studies on the Correlation Between Auto-Ignition Delays and the Methane Number of Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG) |
| title_full | Experimental and Modeling Studies on the Correlation Between Auto-Ignition Delays and the Methane Number of Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG) |
| title_fullStr | Experimental and Modeling Studies on the Correlation Between Auto-Ignition Delays and the Methane Number of Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG) |
| title_full_unstemmed | Experimental and Modeling Studies on the Correlation Between Auto-Ignition Delays and the Methane Number of Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG) |
| title_short | Experimental and Modeling Studies on the Correlation Between Auto-Ignition Delays and the Methane Number of Liquefied Natural Gas (LNG) and Liquefied Biogas (LBG) |
| title_sort | experimental and modeling studies on the correlation between auto ignition delays and the methane number of liquefied natural gas lng and liquefied biogas lbg |
| topic | liquefied natural gas liquefied biogas rapid compression machine auto-ignition delays chemical kinetics modeling |
| url | https://www.frontiersin.org/article/10.3389/fmech.2020.00047/full |
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