Direct air capture (DAC) of CO₂ is an emerging technology in the battle against climate change. Many sorbent materials and different technologies such as moisture swing sorption have been explored for this application. However, developing efficient scaffolds to adopt promising sorbents with fast kinetics is challenging, and very limited effort has been reported to address this critical issue. In this work, the availability and kinetic uptake of CO₂ in sorbents embedded in various matrices are studied. Three scaffolds including a commercially available industrial film containing ion‐exchange resin (IER), IER particles embedded in dense electrospun fibers, and IER particles embedded in porous electrospun fibers are compared, in which a solvothermal polymer additive removal technique is used to create porosity in porous fibers. A frequency response technique is developed to measure the uptake capacity, sorbent availability, and kinetic uptake rate. The porous fiber has 90% IER availability, while the dense fibers have 50% particle accessibility. The sorption half time for both electrospun fiber samples is 10 ± 3 min. Our experimental results demonstrate that electrospinning polymer/sorbent composites is a promising technology to facilitate the handleability of sorbent particles and to improve the sorption kinetics, in which the IER embedded in porous electrospun fibers shows the highest cycle capacity with an uptake rate of 1.4 mol CO₂ per gram‐hour. © 2018 American Institute of Chemical Engineers AIChE J, 65: 214–220, 2019

中文翻译：

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溶剂热聚合物添加剂去除技术制成的含吸附剂的多孔电纺纤维可从环境空气中快速捕获二氧化碳

CO _2的直接空气捕获（DAC）是对抗气候变化的新兴技术。对于这种应用，已经探索了许多吸附剂材料和不同的技术，例如水份波动吸附。然而，开发有效的支架以采用有希望的快速动力学的吸附剂是具有挑战性的，并且已经报道了非常有限的努力来解决这个关键问题。在这项工作中，CO ₂的可用性和动力学吸收对包埋在各种基质中的吸附剂进行了研究。比较了三种支架，包括市售的含离子交换树脂（IER）的工业薄膜，嵌入在紧密电纺纤维中的IER颗粒和嵌入在多孔电纺纤维中的IER颗粒，其中使用了溶剂热聚合物添加剂去除技术来产生多孔性。多孔纤维。开发了一种频率响应技术来测量吸收容量，吸附剂的利用率和动力学吸收速率。多孔纤维具有90％的IER利用率，而致密纤维具有50％的颗粒可达性。两种电纺纤维样品的吸附半衰期均为10±3分钟。₂每克小时。©2018美国化学工程师学会AIChE J，65：214–220，2019