Zeolite adsorbent-MOF layered nanovalves for CH₄ storage

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• 作者：Kirby L. Tate ; Shiguang Li ; Miao Yu ; Moises A. Carreon
• 关键词：Nanovalves ; Methane storage ; Zeolite adsorbent ; Metal organic frameworks ; Coordinating metal
• 刊名：Adsorption
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：23
• 期：1
• 页码：19-24
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Industrial Chemistry/Chemical Engineering; Surfaces and Interfaces, Thin Films; Engineering Thermodynamics, Heat and Mass Transfer;
• 出版者：Springer US
• ISSN：1572-8757
• 卷排序：23

文摘

Herein we demonstrate the use of metal organic framework layers coated on zeolite 5A adsorbent as effective nano-valves for CH₄ storage at low storage pressure. The resultant nanovalved materials are capable of sealing high pressure CH₄ inside the adsorbents and storing it at low pressure. Four different metal organic frameworks (MOF) were grown on 5A zeolite beads, and functioned as nanovalves. These MOFs included HKUST-1, Al-MOF, Ga-MOF, and Co-MOF. Ethanol, a cheap, renewable, and safe chemical, was employed as the nanovalve sealing molecule. It was found that the 2-crystallization step MOFs displayed the best performance regardless of the MOF coordinating metal. The methane storage capacity followed the order: Al-MOF > Ga-MOF > Co-MOF > Cu-MOF. The best performing material, 2-crystallization step Al-MOF, was able to store 33.6 (L (STP) CH₄/L nanovalve adsorbent) excess CH₄, corresponding to 46 % of the CH₄ saturation capacity of the zeolite 5A bead adsorbent at <1 bar.