A review of direct air capture (DAC): scaling up commercial technologies and innovating for the future
A review of direct air capture (DAC): scaling up commercial technologies and innovating for the future
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DOI：
10.1088/2516-1083/abf1ce
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
N. McQueen;Katherine Vaz Gomes;Colin McCormick;Katherine Blumanthal;Max Pisciotta;J. Wilcox
中科院分区：
文献类型：
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作者：
N. McQueen;Katherine Vaz Gomes;Colin McCormick;Katherine Blumanthal;Max Pisciotta;J. Wilcox
直接空气捕获（DAC）可以通过从空气中去除二氧化碳（CO2）来提供一种有效的工程方法来应对气候变化。然而，为了实现气候目标，需要迅速扩大发援会的规模。目前的DAC方法使用填充有化学品的工程接触器来重复地从空气中捕获CO2并释放可以存储或以其他方式使用的高纯度CO2。这篇评论文章的重点是两个独特的，商业DAC过程中结合二氧化碳：固体吸附剂和液体溶剂。我们讨论了溶剂和吸附剂的性质，包括传质，传热和化学动力学，以及这些性质如何影响DAC过程的设计和成本。此外，我们提供了一个新的概述部署这些DAC技术的考虑因素，包括边做边学的概念，可以降低成本和材料要求，扩大DAC技术。
Direct air capture (DAC) can provide an impactful, engineered approach to combat climate change by removing carbon dioxide (CO2) from the air. However, to meet climate goals, DAC needs to be scaled at a rapid rate. Current DAC approaches use engineered contactors filled with chemicals to repeatedly capture CO2 from the air and release high purity CO2 that can be stored or otherwise used. This review article focuses on two distinctive, commercial DAC processes to bind with CO2: solid sorbents and liquid solvents. We discuss the properties of solvents and sorbents, including mass transfer, heat transfer and chemical kinetics, as well as how these properties influence the design and cost of the DAC process. Further, we provide a novel overview of the considerations for deploying these DAC technologies, including concepts for learning-by-doing that may drive down costs and material requirements for scaling up DAC technologies.