Synthesis of high sintering-resistant Ni-modified halloysite based catalysts containing La, Ce, and Co for dry reforming of methane

In the present work, halloysite nanotubes (HNTs) were surface modified by the alkaline molten method and reconstructed into defected nanosheets, which were utilized as a support for different promoted catalysts. The effects of Ce, La, and Co on the physicochemical properties of halloysite-supported...

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Bibliographic Details
Published in:Ceramics international 2022-12, Vol.48 (24), p.37394-37402
Main Authors: Bakhtiari, Kazem, Shahbazi Kootenaei, Amirhossein, Maghsoodi, Sarah, Azizi, Shima, Tabatabaei Ghomsheh, Seyed Mostafa
Format: Article
Language:English
Subjects:
Dry reforming
Halloysite
Methane
Nickel
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Summary:In the present work, halloysite nanotubes (HNTs) were surface modified by the alkaline molten method and reconstructed into defected nanosheets, which were utilized as a support for different promoted catalysts. The effects of Ce, La, and Co on the physicochemical properties of halloysite-supported Ni catalysts were investigated in the dry reforming of methane. Halloysite nanotubes were first reconstructed into nanosheets through a novel alkaline molten method and then impregnated with Ni, Ce, La, and Co. This method resulted in Ni, Ce, La, and Co being confined throughout the halloysite structure, leading to excellent resistance against sintering in the dry reforming of methane. The halloysite-supported Ni catalyst containing Co exhibited the best activity (CH4 and CO2 initial conversion for 89% and 91% at 850 °C, respectively) and the highest stability with the least carbon formation in 600 min time-on-stream tests.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2022.09.062