Influence of the Synthesis Condition on the Crystallization of Fe-β Zeolite Molecular Sieves in the Absence of Aluminum

Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (3): 353.

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Influence of the Synthesis Condition on the Crystallization of Fe-β Zeolite Molecular Sieves in the Absence of Aluminum

HE Hong-Yun^1,2, PANG Wen-Qin¹, LIU Wu-Yang³, DENG Feng³

1. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, Jilin University, Changchun 130023, China;
2. The Institute of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410006, China;
3. State Key Laboratory of Nuclear Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China

Received:2001-06-13 Online:2002-03-24 Published:2002-03-24

Abstract

Abstract: Crystalline Fe-β zeolite molecular sieves have been hydrothermally synthesized. Crystallization rate and average crystal size of Fe-β zeolites have been investigated as a function of n (SiO₂)/ n (Fe₂O₃),n(Na₂O)/ n (SiO₂) and n [(TEA)₂O]/ n (SiO₂) ratios in the initial gel by using two silica sources. The iron content and structural characteristics of products have been determined by means of X-ray diffraction, IRspectra, DTA/TGA, SEM, NMR and ICP. The results show that the crystal sizes of Fe-β zeolites are uniform. The DTA curve of Fe-β, IRspectra and unit cell parameters of the resulting Fe-β zeolites were obviously changed due to the incorporation of iron atoms into the framework.

Key words: Fe-&beta, zeolite, Hydrothermal synthesis, Unit cell parameters, Zeolite molecular sieves

CLC Number:

O624

TrendMD:

HE Hong-Yun, PANG Wen-Qin, LIU Wu-Yang, DENG Feng . Influence of the Synthesis Condition on the Crystallization of Fe-β Zeolite Molecular Sieves in the Absence of Aluminum[J]. Chem. J. Chinese Universities, 2002, 23(3): 353.

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Influence of the Synthesis Condition on the Crystallization of Fe-β Zeolite Molecular Sieves in the Absence of Aluminum

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