Stability of an Al-Fumarate MOF and Its Potential for CO2 Capture from Wet Stream

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• 作者：Juliana A. Coelho ; Ana Mafalda Ribeiro ; Alexandre F. P. Ferreira ; Sebastião M. P. Lucena ; Alírio E. Rodrigues ; Diana C. S. de Azevedo
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：February 24, 2016
• 年：2016
• 卷：55
• 期：7
• 页码：2134-2143
• 全文大小：574K
• ISSN：1520-5045

文摘

In this work, a new aluminum fumarate MOF was investigated regarding its water stability and CO₂ adsorption in the presence and absence of water. The adsorption equilibrium isotherms were measured at 303, 323, and 348 K for CO₂ and at 288 and 313 K for water vapor. Water vapor adsorption isotherms are type IV and were fit using the Langmuir-Ising model. The adsorption capacity of CO₂ at 303 K and 1.0 bar was 2.1 mmol/g and remained constant after exposure to humidity and regeneration. The isosteric heats of adsorption were 21 and 44 kJ/mol for CO₂ and H₂O, respectively. Fixed bed experiments were performed at 303 K to determine breakthrough curves of CO₂, water vapor, and the CO₂/water vapor mixture. Binary breakthrough indicated a reduction of only 17% in CO₂ adsorption capacity for a stream with 14% RH. The remarkable stability of this MOF suits it for such applications as CO₂ capture and thermal storage with water.