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Ni-containing CeO$_2$ rods for dry reforming of methane : activity tests and a multiscale lattice Boltzmann model analysis in two model geometries
ID Strniša, Filip (Author), ID Sagar, Vikram Tatiparthi (Author), ID Djinović, Petar (Author), ID Pintar, Albin (Author), ID Plazl, Igor (Author)

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Abstract
Experimental and theoretical modeling on low-temperature dry methane reforming over Ni-containing CeO$_2$ rods was studied. The catalyst was characterized by means of N$_2$ physisorption, in-situ XRD, TPR and H$_2$ chemisorption techniques. The characterization studies revealed the distortion of CeO$_2$ flourite structure due to the Ni incorporation. Lattice expansion (due to reduction) and contraction (due to oxidation) suggest the reversible redox nature of CeO$_2$. Ni–O–Ce solid solution formation was evidenced by both XRD and TPR studies. H$_2$ chemisorption study revealed that the catalyst reduction temperature plays a significant role in Ni dispersion. The catalyst showed similar activity trends in two model geometries: a between-two-plates microchannel fixed-bed reactor and a conventional fixed-bed reactor. The activity tests were conducted in the kinetic regime, where conversions of CH$_4$ were not influenced with the gas flow rate. A lattice Boltzmann model for mixed gas flow was developed along with a boundary condition for catalytic sites. The lattice Boltzmann model was used in a multiscale simulation of the studied reaction systems and produced data that qualitatively matched the experiments.

Language:English
Keywords:dry reforming of methane, nickel-cerium(IV) oxide rods, lattice Boltzmann method, multiscale modeling, Ni–CeO$_2$ rods
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Technology
Publication status:Published
Publication version:Version of Record
Year:2021
Number of pages:13 str.
Numbering:Vol. 413, art. 127498
PID:20.500.12556/RUL-127096 This link opens in a new window
UDC:66.092.81
ISSN on article:1385-8947
DOI:10.1016/j.cej.2020.127498 This link opens in a new window
COBISS.SI-ID:34724867 This link opens in a new window
Publication date in RUL:17.05.2021
Views:2064
Downloads:286
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Record is a part of a journal

Title:Chemical engineering journal
Shortened title:Chem. eng. j.
Publisher:Elsevier
ISSN:1385-8947
COBISS.SI-ID:2110998 This link opens in a new window

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

Language:Slovenian
Keywords:suhi reforming metana, nikelj-cerijev(IV) oksid, delci, lattice Boltzmanova metoda, večnivojsko modeliranje

Projects

Funder:ARRS - Slovenian Research Agency
Funding programme:Young researchers

Funder:ARRS - Slovenian Research Agency
Project number:P2-0150
Name:Integralni pristop k preprečevanju onesnaževanja voda

Funder:ARRS - Slovenian Research Agency
Project number:P2-0191
Name:Kemijsko inženirstvo

Funder:ARRS - Slovenian Research Agency
Project number:J7-1816
Name:Krožna sinteza trajnostnih (bio)kemijskih procesov na osnovi obnovljivih virov

Funder:ARRS - Slovenian Research Agency
Project number:N2-0067
Name:Večstopenjska sinteza z MIO-encimi v kontinuirnem mikroreaktorskem sistemu

Funder:EC - European Commission
Funding programme:H2020
Project number:811040
Name:Chair Of Micro Process Engineering and TEchnology
Acronym:COMPETE

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