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Journal Article

Kinetics of deactivation on Cu/ZnO/Al2O3 methanol synthesis catalysts

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Kasatkin,  Igor
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Saint Petersburg State University, Research Centre for X-ray Diffraction Studies;

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Schumann,  Julia
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Behrens,  Malte
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Fichtl, M. B., Schlereth, D., Jacobsen, N., Kasatkin, I., Schumann, J., Behrens, M., et al. (2015). Kinetics of deactivation on Cu/ZnO/Al2O3 methanol synthesis catalysts. Applied Catalysis A, 502, 262-270. doi:10.1016/j.apcata.2015.06.014.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0027-C422-5
Abstract
Deactivation behavior is an important topic in catalyst development. In case of methanol synthesis the conventional Cu/ZnO/Al2O3 system is commonly known to be prone to sintering, however, information about the structural development during deactivation or the sintering mechanism(s) are scarce. We present a systematic deactivation study on three different Cu/ZnO/Al2O3 catalysts which are aged under constant conditions and periodically analyzed using kinetic measurements and N2O chemisorption. A power law model for the catalyst activity with time on stream is derived. Furthermore it is found, that the presence of water provokes a steep loss in active surface area and specific activity. Also, the TEM particle size distributions generated during the aging treatment are evaluated and discussed.