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The High Stability Mesoporous MgO-ZrO2 Materials as CO2 Adsorbents

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Abstract:

A novel CO2 absorbent, MgO-ZrO2 nanocomposite was synthesized via appropriate sol-gel process. The structure and surface properties of the as-prepared materials were characterized by XRD, N2 adsorption-desorption and CO2-TPD techniques. It was found the as-prepared materials showed high thermal stability, and their mesoporous framework was well preserved even after calcinations at 700oC. In addition, the nanocomposites exhibited appropriate basic strength and the basic sites were tightly anchored to the substrate, which greatly improved the stability of the surface basicity. Owing to the advantages of the mesoporous structure and the surface basicity, the as-prepared MgO-ZrO2 nanocomposites showed high CO2 adsorption capacity. Moreover, the high thermal stability of MgO-ZrO2 could greatly increase their performance in high-temperature application, which remarkably overcame the poor thermal stability of those organic group grafted porous silicas.

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Periodical:

Advanced Materials Research (Volumes 490-495)

Pages:

3797-3801

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.490-495.3797

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Online since:

March 2012

Authors:

Xin Fu

Keywords:

CO2 Adsorbent, High Stability, MgO-ZrO2, Nanocomposite

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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