Jon Hastings, Thomas Lassitter, Nicholas Fylstra, George K. H. Shimizu and T. Grant Glover*,
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引用次数: 0
摘要
卡尔加里框架 20(CALF-20)是一种蒸汽稳定的金属有机框架(MOF),对水蒸气具有选择性二氧化碳物理吸附作用,这使其成为工业规模烟气二氧化碳捕集的候选材料。在这项工作中,多组分 CO2/H2O 吸附数据表明,α-β 相变对 CALF-20 的多组分 CO2 吸附能力影响很小。此外,高达 175 °C 的 H2O 等温线表明,随着温度升高到 45 °C 以上,水容量的变化有限。通过浓度摆动频率响应测量了 CO2 和 H2O 单组分扩散速率。结果表明,水在 CALF-20 中的扩散速率与水在高透水性 MOF-333 以及 BPL 活性炭中的扩散速率相似。这些数据为深入了解利用 CALF-20 分离 CO2 和 H2O 的基本热力学和传质参数提供了关键信息,并提供了可用于基于 CALF-20 的吸附系统建模的量化参数。
Steam Isotherms, CO2/H2O Mixed-Gas Isotherms, and Single-Component CO2 and H2O Diffusion Rates in CALF-20
Calgary Framework 20 (CALF-20) has emerged as a metal–organic framework (MOF) that is steam-stable and exhibits selective CO2 physisorption over water vapor, which makes it a candidate for industrial-scale CO2 capture from flue gases. In this work, multicomponent CO2/H2O adsorption data show that the α-to-β phase transformation has little impact on the multicomponent CO2 adsorption capacity of CALF-20. Also, H2O isotherms up to 175 °C reveal only limited changes in the water capacity as temperature increases above 45 °C. CO2 and H2O single-component diffusion rates were measured via concentration swing frequency response. The results show that the diffusion rate of water through CALF-20 is similar to that of water diffusion in the highly water-permeable MOF-333, as well as BPL-activated carbon. The data provides key insight into the fundamental thermodynamic and mass transfer parameters that govern the separation of CO2 and H2O using CALF-20 and provides quantified parameters that can be used to model adsorption systems based on CALF-20.
期刊介绍:
ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.