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2011•Special publication - Royal Society of Chemistry/Special publicationRequires access

The Underlying Mechanism of Hydrothermal Stability for Ordered Mesoporous Molecular Sieves without Micropores

Hengjian Pu, H. Wang, Songlin Xu, Chengliang Han, L. Y. Zhang, Y. Y. Zhang, Dong‐Ying Du, Yaoyihan Luo

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Abstract

Micropore-free SBA-15-type mesoporous molecular sieves MSAMS-2 and MSAMS-4 show extraordinary stability both in boiling water (100 °C over 360 h) and high temperature steam (800 °C for 6 h). FT-IR together with XRD, FE-SEM and HR-TEM characterizations demonstrate the zeolite-like five-membered ring subunits other than zeolite crystals embedded within the framework pores of MSAMA-2 and MSAMS-4 should play a crucial role in improving the hydrothermal stability.

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What this paper is about

Micropore-free SBA-15-type mesoporous molecular sieves MSAMS-2 and MSAMS-4 show extraordinary stability both in boiling water (100 °C over 360 h) and high temperature steam (800 °C for 6 h). FT-IR together with XRD, FE-SEM and HR-TEM characterizations demonstrate the zeolite-like five-membered ring subunits other than zeolite crystals embedded within the framework pores of MSAMA-2 and MSAMS-4 should play a crucial role in improving the hydrothermal stability.

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Available abstract

Micropore-free SBA-15-type mesoporous molecular sieves MSAMS-2 and MSAMS-4 show extraordinary stability both in boiling water (100 °C over 360 h) and high temperature steam (800 °C for 6 h). FT-IR together with XRD, FE-SEM and HR-TEM characterizations demonstrate the zeolite-like five-membered ring subunits other than zeolite crystals embedded within the framework pores of MSAMA-2 and MSAMS-4 should play a crucial role in improving the hydrothermal stability.

Key concepts: Microporous material, Molecular sieve, Hydrothermal circulation, Mesoporous material, Zeolite, Chemical engineering, Materials science, Boiling

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