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    Laminar Burning Velocities and Kinetic Modeling of a Renewable E-Fuel: Formic Acid and Its Mixtures with H2 and CO2

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    Laminar burning.pdf
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    Type
    Article
    Authors
    Sarathy, Mani cc
    Brequigny, Pierre
    Katoch, Amit
    Elbaz, Ayman M.
    Roberts, William L. cc
    Dibble, Robert W. cc
    Foucher, Fabrice
    KAUST Department
    Chemical Engineering Program
    Clean Combustion Research Center
    Combustion and Pyrolysis Chemistry (CPC) Group
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    high-pressure combustion (HPC) Research Group
    Date
    2020-05-22
    Online Publication Date
    2020-05-22
    Print Publication Date
    2020-06-18
    Embargo End Date
    2021-05-22
    Submitted Date
    2020-03-30
    Permanent link to this record
    http://hdl.handle.net/10754/662933
    
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    Abstract
    Formic acid is a promising fuel candidate that can be generated by reacting renewable hydrogen with carbon dioxide. However, the burning characteristics of formic acid/air mixtures have not been extensively studied. Furthermore, due to its low reactivity, the addition of hydrogen to formic acid/air mixtures may help with improving burning characteristics. This paper presents the first extensive study of formic acid/air premixed laminar burning velocities, as well as mixtures with hydrogen and carbon dioxide. Unstretched laminar burning velocities and Markstein lengths of formic acid in air for two different unburnt gas temperatures and equivalence ratios are presented. Measurements of formic acid mixed with various proportions of hydrogen and carbon dioxide in air are also studied as a potential renewable fuel for the future. Experimental results demonstrate the low burning velocities of formic acid and the ability to significantly enhance flame speeds by hydrogen addition. A modified detailed kinetic model for combustion of formic acid and its mixtures with hydrogen is proposed by merging well-validated literature models. The proposed model reproduces the experimental observations and provides the basis for understanding the combustion kinetics of formic acid laminar premixed flames, as well as mixtures with hydrogen. It is shown that the HOCO radical is the principal intermediate in formic acid combustion, and hydrogen addition accelerates the decomposition of HOCO radical thereby accelerating burning velocities.
    Citation
    Sarathy, S. M., Brequigny, P., Katoch, A., Elbaz, A. M., Roberts, W. L., Dibble, R. W., & Foucher, F. (2020). Laminar Burning Velocities and Kinetic Modeling of a Renewable E-Fuel: Formic Acid and Its Mixtures with H2 and CO2. Energy & Fuels. doi:10.1021/acs.energyfuels.0c00944
    Sponsors
    Research performed by the Clean Combustion Research Center was supported by King Abdullah Univeristy of Science and Technology (KAUST) and Saudi Aramco.
    Publisher
    American Chemical Society (ACS)
    Journal
    Energy & Fuels
    DOI
    10.1021/acs.energyfuels.0c00944
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.energyfuels.0c00944
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.energyfuels.0c00944
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Mechanical Engineering Program; Clean Combustion Research Center

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