On the potential of phase-change adsorbents for CO2 capture by temperature swing adsorption
On the potential of phase-change adsorbents for CO2 capture by temperature swing adsorption
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DOI：
10.1039/c6fd00040a
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发表时间：
2016-01-01
影响因子：
3.4
通讯作者：
Mazzotti, Marco
中科院分区：
文献类型：
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作者：
Hefti, Max;Joss, Lisa;Mazzotti, Marco
我们研究了一类最近发现的金属有机框架材料在变温吸附（TSA）过程中用于CO2捕获的潜力；所考虑的材料的特殊性在于它们的可逆和温度依赖的阶梯状CO2吸附等温线。具体而言，我们提出了一项全面的建模研究，其中评估了五种具有阶梯等温线的不同材料在四步TSA循环中的性能[McDonald等人，Nature, 2015,519,303]。与商用13X沸石相比，使用这些材料的TSA工艺的比能量需求更低，并且需要更小的温度波动来达到相似的二氧化碳纯度和回收率水平。说明和讨论了吸附等温线中一个步骤的影响，并确定了导致所考虑的TSA循环的最佳和稳健操作的设计标准。提出的标准可以指导材料科学家设计新的材料，其台阶位置适合特定的二氧化碳分离任务。
We investigate the potential of a class of recently discovered metal-organic-framework materials for their use in temperature swing adsorption ( TSA) processes for CO2 capture; the particularity of the considered materials is their reversible and temperature dependent step-shaped CO2 adsorption isotherm. Specifically, we present a comprehensive modeling study, where the performance of five different materials with step-shaped isotherms [ McDonald et al., Nature, 2015, 519, 303] in a four step TSA cycle is assessed. The specific energy requirement of the TSA process operated with these materials is lower than for a commercial 13X zeolite, and a smaller temperature swing is required to reach similar levels of CO2 purity and recovery. The effect of a step in the adsorption isotherm is illustrated and discussed, and design criteria that lead to an optimal and robust operation of the considered TSA cycle are identified. The presented criteria could guide material scientists in designing novel materials whose step position is tailored to specific CO2 separation tasks.