An Hetero-Epitaxially Grown Zeolite Membrane.,Angewandte Chemie International Edition

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An Hetero-Epitaxially Grown Zeolite Membrane.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-10-30 , DOI: 10.1002/anie.201911164
Yanghwan Jeong ₁ , Sungwon Hong ₁ , Eunhee Jang ₁ , Eunjoo Kim ₁ , Hionsuck Baik ₂ , Nakwon Choi ₃ , Alex C K Yip ₄ , Jungkyu Choi ₁

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The secondary growth methodology to form zeolite membranes has stringent requirements for homogeneous epitaxial intergrowth of the seed layer and limits the number of accessible high-quality zeolite membranes. Despite previous reports on hetero-epitaxial growth, high-performance zeolite membranes have yet to be reported using this approach. Here, the successful hetero-epitaxial growth of highly siliceous ZSM-58 (DDR-type zeolite) films from a SSZ-13 (CHA-type zeolite) seed layer is reported. The resulting membranes show excellent CO2 perm-selectivities, having maximum CO2 /N2 and CO2 /CH4 separation factors (SFs) as high as about 17 and 279, respectively, at 30 °C. Furthermore, the hybrid membrane maintains the CO2 perm-selectivity in the presence of water vapor (the third main component in both cases), that is, CO2 /N2 SF of about 14 and CO2 /CH4 SF of about 78, respectively, at 50 °C (a representative temperature of both CO2 -containing streams).

中文翻译：

异质外延生长的沸石膜。

形成沸石膜的二次生长方法对种子层的均匀外延共生有严格的要求，并限制了可及的高质量沸石膜的数量。尽管先前有关于异质外延生长的报道，但尚未报道使用这种方法的高性能沸石膜。在此，报道了从SSZ-13（CHA型沸石）晶种层成功地完成了高度硅质的ZSM-58（DDR型沸石）薄膜的异质外延生长。所得的膜表现出优异的CO 2渗透选择性，在30℃下具有最大的CO 2 / N 2和CO 2 / CH 4分离因子（SFs），分别高达约17和279。此外，杂化膜在水蒸气（两种情况下均为第三主要成分）存在的情况下仍可保持CO2的渗透选择性。

更新日期：2019-10-30

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