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Utilizing CO2 and rejected H2 from FP-PEMFC system: A combined experimental and modelling study on CO2 methanation with low H2/CO2 over Ni–La/Al2O3.

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Title: Utilizing CO2 and rejected H2 from FP-PEMFC system: A combined experimental and modelling study on CO2 methanation with low H2/CO2 over Ni–La/Al2O3.
Authors: Öztepe, Cihat1,2 (AUTHOR) cihat.oztepe@bogazici.edu.tr, Mutlu, Ece Cigdem2,3 (AUTHOR) emutlu@ucf.edu, Caglayan, Burcu Selen2,4 (AUTHOR) selenbur@bogazici.edu.tr, Aksoylu, A. Erhan1,2 (AUTHOR) aksoylu@bogazici.edu.tr
Source: International Journal of Hydrogen Energy. Oct2024, Vol. 88, p815-829. 15p.
Subjects: Bimetallic catalysts, Response surfaces (Statistics), Carbon dioxide, Methanation, Temperature effect
Abstract: In an FP-PEMFC system vent, recycling a fraction of CO 2 provides clear benefits for CO 2 utilization and rejected H 2 conversion to methane. However, the low H 2 /CO 2 ratio, deviating from the ideal stoichiometric value, presents challenges. This study examines the effects of temperature, H 2 /CO 2 ratio, residence time (F/W cat ratio), and La promoter loading on CO 2 and H 2 conversions and CH 4 selectivity over Ni–La/γ-Al 2 O 3 catalyst using a Box-Behnken design. Experimentally, higher CO 2 conversion is observed with increased temperature, H 2 /CO 2 , La loading, and reduced F/W. CH 4 selectivity, however, decreases with higher temperature and F/W but improves with higher H 2 /CO 2 and La loading. Modeling highlighted significant interactions, revealing two optimal conditions: for low La loading, high temperature, H 2 /CO 2 , and F/W are favorable; for high La loading, lower temperature and F/W, coupled with a high H 2 /CO 2 , are optimal. These findings necessitate precise control over input factors, especially H 2 /CO 2 , in optimizing methanation under low H 2 /CO 2 conditions. [Display omitted] • Effective CO 2 methanation with low H 2 /CO 2 ratios and optimal catalyst conditions. • Finding complex interaction where traditional kinetic models struggle. • Nonlinear and combined effects of temperature, La loading and/or F/W. • Combined optimization of catalyst formulation and reaction conditions. • Crucial use of RSM unraveling complex relationship for combined input optimization. [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
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DbLabel: Engineering Source
An: 180213443
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Utilizing CO2 and rejected H2 from FP-PEMFC system: A combined experimental and modelling study on CO2 methanation with low H2/CO2 over Ni–La/Al2O3.
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  Data: <searchLink fieldCode="AR" term="%22Öztepe%2C+Cihat%22">Öztepe, Cihat</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> cihat.oztepe@bogazici.edu.tr</i><br /><searchLink fieldCode="AR" term="%22Mutlu%2C+Ece+Cigdem%22">Mutlu, Ece Cigdem</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<i> emutlu@ucf.edu</i><br /><searchLink fieldCode="AR" term="%22Caglayan%2C+Burcu+Selen%22">Caglayan, Burcu Selen</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)<i> selenbur@bogazici.edu.tr</i><br /><searchLink fieldCode="AR" term="%22Aksoylu%2C+A%2E+Erhan%22">Aksoylu, A. Erhan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> aksoylu@bogazici.edu.tr</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Oct2024, Vol. 88, p815-829. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Bimetallic+catalysts%22">Bimetallic catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Response+surfaces+%28Statistics%29%22">Response surfaces (Statistics)</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+dioxide%22">Carbon dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Methanation%22">Methanation</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink>
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  Label: Abstract
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  Data: In an FP-PEMFC system vent, recycling a fraction of CO 2 provides clear benefits for CO 2 utilization and rejected H 2 conversion to methane. However, the low H 2 /CO 2 ratio, deviating from the ideal stoichiometric value, presents challenges. This study examines the effects of temperature, H 2 /CO 2 ratio, residence time (F/W cat ratio), and La promoter loading on CO 2 and H 2 conversions and CH 4 selectivity over Ni–La/γ-Al 2 O 3 catalyst using a Box-Behnken design. Experimentally, higher CO 2 conversion is observed with increased temperature, H 2 /CO 2 , La loading, and reduced F/W. CH 4 selectivity, however, decreases with higher temperature and F/W but improves with higher H 2 /CO 2 and La loading. Modeling highlighted significant interactions, revealing two optimal conditions: for low La loading, high temperature, H 2 /CO 2 , and F/W are favorable; for high La loading, lower temperature and F/W, coupled with a high H 2 /CO 2 , are optimal. These findings necessitate precise control over input factors, especially H 2 /CO 2 , in optimizing methanation under low H 2 /CO 2 conditions. [Display omitted] • Effective CO 2 methanation with low H 2 /CO 2 ratios and optimal catalyst conditions. • Finding complex interaction where traditional kinetic models struggle. • Nonlinear and combined effects of temperature, La loading and/or F/W. • Combined optimization of catalyst formulation and reaction conditions. • Crucial use of RSM unraveling complex relationship for combined input optimization. [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:
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      – Type: doi
        Value: 10.1016/j.ijhydene.2024.09.168
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 815
    Subjects:
      – SubjectFull: Bimetallic catalysts
        Type: general
      – SubjectFull: Response surfaces (Statistics)
        Type: general
      – SubjectFull: Carbon dioxide
        Type: general
      – SubjectFull: Methanation
        Type: general
      – SubjectFull: Temperature effect
        Type: general
    Titles:
      – TitleFull: Utilizing CO2 and rejected H2 from FP-PEMFC system: A combined experimental and modelling study on CO2 methanation with low H2/CO2 over Ni–La/Al2O3.
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            NameFull: Öztepe, Cihat
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            NameFull: Mutlu, Ece Cigdem
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            NameFull: Caglayan, Burcu Selen
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            NameFull: Aksoylu, A. Erhan
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              Text: Oct2024
              Type: published
              Y: 2024
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              Value: 88
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