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T. Intana, K. Föttinger, G. Rupprechter, P. Kongkachuichay:
"Role of Copper and Cerium on Core-Shell Al-MCM-41 in NO Reduction via a SCR-CH₄";
Journal of Nanoscience and Nanotechnology, 18 (2018), 18; 132 - 142.

Copper species in the structure of Cu/core-shell Al-MCM-41 catalysts prepared by different techniques of Cu loading-substitution (S), ion-exchange (E), and impregnation (I) methods-were tested for NO reduction via a selective catalytic reaction with methane. Cerium was added to enhance the performance of copper. It was found that the 1.5%Ce-SEI-Cu/Al-MCM-41, in which Cu was loaded by all three techniques gave the highest NO conversion of 85% at 500 C. Based on the results from FT-IR in-situ experiment, the mechanism of SCR-CH₄ reaction is proposed. The ion-exchange method gives the best performance of SCR-CH₄ reaction when compared with the other methods, because the Cu of reduced catalyst in this method exists in isolated Cu(I), which is an active site of the SCR-CH₄ reaction. With H₂O in the feed, the NO conversion of 1.5%-Ce-SEI-Cu/Al-MCM-41 catalyst is found to be rather stable.

Cu, Ce, Al-MCM-41, NO, Reduction, SCR-CH₄

http://dx.doi.org/10.1166/jnn.2018.14583

http://publik.tuwien.ac.at/files/publik_265176.pdf