Mayenite supported perovskite monoliths for catalytic combustion of methyl methacrylate

Zekai ZHANG, Zhijian KONG, Huayan LIU, Yinfei CHEN

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PDF(692 KB)
Front. Chem. Sci. Eng. ›› 2014, Vol. 8 ›› Issue (1) : 87-94. DOI: 10.1007/s11705-014-1410-5
RESEARCH ARTICLE

Mayenite supported perovskite monoliths for catalytic combustion of methyl methacrylate

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Abstract

To improve their thermal stability, La0.8Sr0.2MnO3 cordierite monoliths are washcoated with mayenite, which is a novel Al-based material with the crystal structure of 12MO·7Al2O3 (M= Ca, Sr). The monoliths are characterized by means of nitrogen adsorption/desorption, scanning electron microscopy, and X-ray diffraction. Catalytic performances of the monoliths are tested for methyl methacrylate combustion. The results show that mayenite obviously improves both the physic-chemical properties and the catalytic performance of the monoliths. Because mayenite improves the dispersity of La0.8Sr0.2MnO3 and also prevents the interaction between La0.8Sr0.2MnO3 and cordierite or γ-Al2O3, both crystal structure and surface morphology of La0.8Sr0.2MnO3 phase can thereby be stable on the mayenite surface even at high temperature up to 1050 ºC. Under the given reaction conditions, La0.8Sr0.2MnO3 monolith washcoated with 12SrO·7Al2O3 shows the best catalytic activity for methyl methacrylate combustion among all the tested monoliths.

Keywords

mayenite / perovskite / catalytic combustion / methyl methacrylate / monolith

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Zekai ZHANG, Zhijian KONG, Huayan LIU, Yinfei CHEN. Mayenite supported perovskite monoliths for catalytic combustion of methyl methacrylate. Front Chem Sci Eng, 2014, 8(1): 87‒94 https://doi.org/10.1007/s11705-014-1410-5

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Acknowledgments

We would like to acknowledge the financial support of the Natural Science Foundation of China (Grant No. 20903080).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg
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