Thermal Decomposition of Microporous Aluminophosphate AlPO4-HDA

Abstract

Abstract: Thermal decomposition of microporous aluminophosphate AlPO₄-HDA has been investigated by using thermogravimetric-differential thermal analysis coupled with mass spectrometry(TG-DTA-MS), X-ray diffraction(XRD), Fourier transform infrared (FTIR) and solid-state MAS NMR spectroscopy. The results show that the template decomposition involves three steps. First, the H-bondings between the inorganic framework and the template are broken; then, the template undergoes sequential Hofmann degradation reactions followed by β-eliminations and oxidations; finally, the remaining organic components are removed at a high temperature. The results obtained by using MAS NMR indicate that there is a change in the coordination state of certain framework Al and Pwith the partial removal of the template.

Key words: Thermal decomposition, AlPO₄-HDA, 1,6-Hexanediamine

CLC Number:

O614

TrendMD:

XIAO Li-Ping, XU Ru-Ren. Thermal Decomposition of Microporous Aluminophosphate AlPO₄-HDA[J]. Chem. J. Chinese Universities, 2003, 24(9): 1537.

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Thermal Decomposition of Microporous Aluminophosphate AlPO₄-HDA

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