TY - JOUR
T1 - Crystallization behavior of zeolite beta during steam-assited crystallization of dry gel
AU - Matsukata, M.
AU - Osaki, T.
AU - Ogura, M.
AU - Kikuchi, E.
PY - 2002/10
Y1 - 2002/10
N2 - Zeolite beta with SiO2/Al2O3 ratios from 30 to 730 was synthesized by a steam-assisted crystallization method, and the crystallized products obtained within 24 h were characterized by means of chemical analyses, XRD, FE-SEM, 29Si-MAS NMR, N2 adsorption, and temperature-programmed decomposition of tetraethylammonium cation occluded in the micropores of zeolite beta. Based on these results, the crystallization mechanism is discussed herein. It was found that agglomerates of nano-particles were formed from a dry gel before the development of a periodical structure in a long-range order, which can be detected by XRD. After several hours of crystallization, morphological changes in nano-particle agglomerates proceeded to give highly crystalline zeolite beta.
AB - Zeolite beta with SiO2/Al2O3 ratios from 30 to 730 was synthesized by a steam-assisted crystallization method, and the crystallized products obtained within 24 h were characterized by means of chemical analyses, XRD, FE-SEM, 29Si-MAS NMR, N2 adsorption, and temperature-programmed decomposition of tetraethylammonium cation occluded in the micropores of zeolite beta. Based on these results, the crystallization mechanism is discussed herein. It was found that agglomerates of nano-particles were formed from a dry gel before the development of a periodical structure in a long-range order, which can be detected by XRD. After several hours of crystallization, morphological changes in nano-particle agglomerates proceeded to give highly crystalline zeolite beta.
KW - Crystallization mechanism
KW - SiO/AlO ratio
KW - Steam-assisted crystallization
KW - Zeolite beta
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U2 - 10.1016/S1387-1811(02)00412-2
DO - 10.1016/S1387-1811(02)00412-2
M3 - Article
AN - SCOPUS:0036771955
VL - 56
SP - 1
EP - 10
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
IS - 1
ER -