Pure silica-supported transition metal catalysts for the non-oxidative dehydrogenation of ethane: confinement effects on the stability
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ArticleAuthors
De, SudiptaAguilar-Tapia, Antonio
Ould-Chikh, Samy
Zitolo, Andrea

Hazemann, Jean-Louis

Shterk, Genrikh

Ramirez, Adrian
Gascon, Jorge
KAUST Department
KAUST Catalysis Center (KCC)Chemical Science
Physical Science and Engineering (PSE) Division
Chemical Engineering Program
Date
2022-03-25Permanent link to this record
http://hdl.handle.net/10754/676317
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Designing robust catalysts for high-temperature applications has always been a critical task for chemical industries. As an example, the non-oxidative dehydrogenation of alkanes is an important chemical process that requires thermally stable metal catalysts with high resistance to metal sintering. The main obstacle is to maintain the high dispersion of the active metal centres under reaction and regeneration conditions. In an attempt to overcome this issue, here we use all-silica zeolite as a support to make nanometric and single-site metal catalysts with enhanced stability for the non-oxidative dehydrogenation of ethane. Preliminary screening of different metal catalysts suggests that Co has the highest intrinsic activity while Cr and V are highly stable against sintering and display a moderate activity. The high stability of Cr and V could be attributed to their high Gibbs energy of reduction under reaction conditions. Operando X-ray absorption spectroscopy revealed that Cr based catalysts remain as single-site monomeric species during the reaction, making it possible to increase the loading and therefore productivity. In the case of Co, we established the optimum parameters to achieve the highest activity by evaluating the effects of support, metal loading, promoter, and synthesis processCitation
De, S., Aguilar-Tapia, A., Ould-Chikh, S., Zitolo, A., Hazemann, J.-L., Shterk, G., Ramirez, A., & Gascon, J. (2022). Pure silica-supported transition metal catalysts for the non-oxidative dehydrogenation of ethane: confinement effects on the stability. Journal of Materials Chemistry A. https://doi.org/10.1039/d2ta00223jPublisher
Royal Society of Chemistry (RSC)Journal
Journal of Materials Chemistry AAdditional Links
http://xlink.rsc.org/?DOI=D2TA00223Jae974a485f413a2113503eed53cd6c53
10.1039/d2ta00223j
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