Synthesis of porous cordierite and application for MnO x /TiO2 catalyst support

Synthesis of porous cordierite and application for MnO x /TiO2 catalyst support In this study the porous cordierite supports were synthesized from kaolin, magnesium oxide, silicon dioxide, and starch as pore-forming agent. A firing temperature, a optimum added amount of the starch, an acid treating time, and impregnation times for the cordierite support were all discussed. The results showed that when the firing temperature was 1300°C and the amount of the pore-forming agent was 8%, the bending strength and thermal expansion coefficient of the cordierite sample were 19.48 MPa and 1.94 × 10−6 °C−1, respectively, which fitted for MnO x /TiO2 SCR catalyst’s support. The FTIR indicated that it was necessary for the cordierite to be treated by 2mol L−1 nitric acid, this process could introduce a larger number of oxygen-containing functional groups and create a more hydrophilic surface structure. The SEM images illustrated that the acid treatment resulted in developing the amount of pores, which contributed to the gas-solid phase reaction. When the cordierite supports were impregnated 5 times in the MnO x /TiO2 solution, a loading amount of MnO x /TiO2 was 20.05%. With this MnO x /TiO2/cordierite samples, the maximum NO conversion could reach 85.4% at 200°C, which met the requirement of cement industry for selective catalytic reduction (SCR) with NH3. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Synthesis of porous cordierite and application for MnO x /TiO2 catalyst support

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Publisher
Springer Journals
Copyright
Copyright © 2014 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427214110287
Publisher site
See Article on Publisher Site

Abstract

In this study the porous cordierite supports were synthesized from kaolin, magnesium oxide, silicon dioxide, and starch as pore-forming agent. A firing temperature, a optimum added amount of the starch, an acid treating time, and impregnation times for the cordierite support were all discussed. The results showed that when the firing temperature was 1300°C and the amount of the pore-forming agent was 8%, the bending strength and thermal expansion coefficient of the cordierite sample were 19.48 MPa and 1.94 × 10−6 °C−1, respectively, which fitted for MnO x /TiO2 SCR catalyst’s support. The FTIR indicated that it was necessary for the cordierite to be treated by 2mol L−1 nitric acid, this process could introduce a larger number of oxygen-containing functional groups and create a more hydrophilic surface structure. The SEM images illustrated that the acid treatment resulted in developing the amount of pores, which contributed to the gas-solid phase reaction. When the cordierite supports were impregnated 5 times in the MnO x /TiO2 solution, a loading amount of MnO x /TiO2 was 20.05%. With this MnO x /TiO2/cordierite samples, the maximum NO conversion could reach 85.4% at 200°C, which met the requirement of cement industry for selective catalytic reduction (SCR) with NH3.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Mar 3, 2015

References

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