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Petroleum Science >2010,??Issue 4:??541-546 DOI: https://doi.org/10.1007/s12182-010-0106-9

Crystallization behavior of zeolite beta from acid-leached metakaolin Open?Access

文章信息

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作者：Li Qiang,Zhang Ying,Cao Zhijun,Gao Wei and Cui Lishan
作者單位：

Department of Materials Science and Technology, China University of Petroleum, Beijing 102249, China; National Key Laboratory of Multiphase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;Department of Materials Science and Technology, China University of Petroleum, Beijing 102249, China; Microstructure Laboratory for Energy Materials, China University of Petroleum, Beijing 102249, China;Department of Materials Science and Technology, China University of Petroleum, Beijing 102249, China;Department of Materials Science and Technology, China University of Petroleum, Beijing 102249, China;Department of Materials Science and Technology, China University of Petroleum, Beijing 102249, China; Microstructure Laboratory for Energy Materials, China University of Petroleum, Beijing 102249, China

投稿時(shí)間：2010-01-06
引用方式：Li, Q., Zhang, Y., Cao, Z. et al. Pet. Sci. (2010) 7: 541. https://doi.org/10.1007/s12182-010-0106-9

文章摘要

Well-crystallized zeolite beta was synthesized by using acid-leached metakaolin as the silica-alumina source and tetraethylammonium hydroxide structure-directing agent. The influence of the composition of the reaction mixture on product crystallinity was investigated, and the crystallization process was studied by examining solid samples obtained at different synthesis times. Results showed that the acid-leached metakaolin was fully converted into soluble aluminum and silicon species, which is crucial for the formation of well-crystallized zeolite beta. At the beginning of the crystallization process, these soluble aluminum and silicon species formed a aluminum-rich intermediate structure with layer morphology. With the crystallization proceeding, more silicon species were incorporated into the zeolite beta framework and the layered structure was changed into spherical particles of zeolite beta with high SiO22/Al2O3 ratio and crystallinity.

關(guān)鍵詞

    Zeolite beta, acid-leached metakaolin, tetraethylammonium hydroxide (TEAOH), liquid phase transformation mechanism