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| Rapid Synthesis of Low-Silica Chabazite Zeolite with the Addition of Heterogenous Seeds |
| Author Name | Affiliation | E-mail | | LI Yu-Qin | Institute of Advanced Materials(IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China | | | HU Na | Institute of Advanced Materials(IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China | | | ZHANG Fei | Institute of Advanced Materials(IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China | | | ZHU Mei-Hua | Institute of Advanced Materials(IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China | | | WU Ting | Institute of Advanced Materials(IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China | | | CHEN Xiang-Shu | Institute of Advanced Materials(IAM), State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China | cxs66cn@jxnu.edu.cn |
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| Abstract: Pure-phase low-silica chabazite zeolites were rapidly synthesized by the addition of heterogenous seeds (zeolite T) without organic structural directing agents (OSDAs). Structural properties and morphology characteristics of the products were characterized using XRD, SEM, TEM, 27Al MAS NMR and UV Raman spectroscopy. Crystallization process of chabazite and the various parameters such as seed content, nAl2O3/nSiO2, nH2O/nSiO2 and alkalinity on the crystallization of crystals were investigated in detail. The formation mechanism of chabazite zeolite induced by zeolite T seed was also discussed. Only zeolite L was formed in the in-situ synthesis system while pure chabazite zeolite was fast obtained by adding a certain amount of zeolite T into the gel. The six-membered (6R) and four-membered rings (4R) released from the dissolved zeolite T under certain hydrothermal conditions rapidly formed the characteristic unit of chabazite zeolite (CHA cage), which inhibited the formation of the characteristic unit and characteristic cage of zeolite L (the CAN cage without four-membered ring). |
| Keywords: chabazite zeolite hydrothermal synthesis heterogenous seeds OSDA-free |
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| LI Yu-Qin,HU Na,ZHANG Fei,ZHU Mei-Hua,WU Ting,CHEN Xiang-Shu.Rapid Synthesis of Low-Silica Chabazite Zeolite with the Addition of Heterogenous Seeds[J].Chinese Journal of Inorganic Chemistry,2018,34(12):2143-2152. |
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