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Ni-containing CeO [sub] 2 rods for dry reforming of methane : activity tests and a multiscale lattice Boltzmann model analysis in two model geometries
Strniša, Filip (Author), Sagar, Tatiparthi Vikram (Author), Djinović, Petar (Author), Pintar, Albin (Author), Plazl, Igor (Author)

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Abstract
Experimental and theoretical modeling on low-temperature dry methane reforming over Ni-containing CeO2 rods was studied. The catalyst was characterized by means of N2 physisorption, in-situ XRD, TPR and H2 chemisorption techniques. The characterization studies revealed the distortion of CeO2 flourite structure due to the Ni incorporation. Lattice expansion (due to reduction) and contraction (due to oxidation) suggest the reversible redox nature of CeO2. Ni–O–Ce solid solution formation was evidenced by both XRD and TPR studies. H2 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 CH4 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
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Technology
Year:2021
Number of pages:Str. 1-13
Numbering:Vol. 413, art. 127498
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
Views:184
Downloads:61
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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

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:MR-39080

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0150
Name:Integralni pristop k preprečevanju onesnaževanja voda

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0191
Name:Kemijsko inženirstvo

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:J7-1816
Name:Krožna sinteza trajnostnih (bio)kemijskih procesov na osnovi obnovljivih virov

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:N2-0067
Name:Večstopenjska sinteza z MIO-encimi v kontinuirnem mikroreaktorskem sistemu

Funder:EC - European Commission
Funding Programme:H2020
Project no.:811040
Name:Chair Of Micro Process Engineering and TEchnology
Acronym:COMPETE

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:28.10.2020

Secondary language

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

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