钙长石
沸石
硅酸铝
吸附
纳米晶
化学工程
模板
材料科学
吸附
选择性吸附
选择性
分子
催化作用
分子筛
纳米技术
结晶
无机化学
化学
有机化学
工程类
作者
Maxime Debost,Paul Benjamin Klar,Nicolas Barrier,Edwin B. Clatworthy,Julien Grand,F. Lainé,Petr Brázda,Lukáš Palatinus,Nikolai Nesterenko,Philippe Boullay,Svetlana Mintova
标识
DOI:10.1002/anie.202009397
摘要
Abstract Small‐pore zeolites such as chabazite (CHA) are excellent candidates for the selective separation of CO 2 ; however, the current synthesis involves several steps and the use of organic structure‐directing agent (OSDA), increasing their cost and energy requirements. We report the synthesis of small‐pore zeolite crystals (aluminosilicate) with CHA‐type framework structure by direct synthesis in a colloidal suspension containing a mixture of inorganic cations only (Na + , K + , and Cs + ). The location of CO 2 molecules in the host structure was revealed by 3D electron diffraction (3D ED). The high sorption capacity for CO 2 (3.8 mmol g −1 at 121 kPa), structural stability and regenerability of the discreate CHA zeolite nanocrystals is maintained for 10 consecutive cycles without any visible degradation. The CHA zeolite (Si:Al=2) reaches an almost perfect CO 2 storage capacity (8 CO 2 per unit cell) and high selectivity (no CH 4 was adsorbed).
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