A sorbent-focused techno-economic analysis of direct air capture
A sorbent-focused techno-economic analysis of direct air capture
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DOI：
10.1016/j.apenergy.2019.04.012
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发表时间：
2019-09-15
期刊：
影响因子：
11.2
通讯作者：
Lackner, Klaus S.
中科院分区：
文献类型：
--
作者：
Azarabadi, Habib;Lackner, Klaus S.
直接空气捕集，即从空气中去除二氧化碳，需要具有高捕集能力、快速动力学和长寿命的特殊吸附剂。除此之外，它们还需要负担得起。然而，由于空气捕集仍处于早期发展阶段，成本仍然是uncertaints.We提出了一个技术经济模型来评估吸附剂的基础上的CO2市场价格和最重要的吸附剂的特性：周期时间，负载能力，和降解率。该模型给出了任何空气捕获吸附剂的净现值方程，无论其使用水分摆动、压力摆动还是热摆动进行再生，并且使得可以估计任何空气捕获吸附剂的最大允许预算，即，该分析旨在将快速增长的空气捕获吸附剂开发领域集中在最重要的参数上。吸附剂的价值受到其寿命的显著影响。为了在经济上可行，典型的吸附剂必须经受住数万次（如果不是数十万次的话）装载和卸载循环。该模型还可以用来研究不同吸附剂参数之间的相互作用。例如，负载能力和循环时间之间的相关性使得有可能确定优化空气捕获装置的经济性的循环时间，我们的分析突出了空气捕获成本分析中一些被忽视的参数的重要性，如循环持续时间和吸附剂的稳定性。最后，该分析也可适用于燃烧后烟气吸附剂。
Direct air capture, the removal of carbon dioxide from air, requires special sorbents, with high capture capacity, fast kinetics and long lifetime. Beyond that they also need to be affordable. However, since air capture is still in an early development stage, costs are still uncertain.We present a techno-economic model to value a sorbent based on the CO2 market price and the most important sorbent characteristics: cycle time, loading capacity, and rate of degradation. The model gives a net present value equation for any air capture sorbent, whether it uses a moisture swing, pressure swing or thermal swing for regeneration and makes it possible to estimate the maximum allowable budget for any air capture sorbent, i.e., the sorbent value.The analysis aims to focus the rapidly growing field of air capture sorbent development onto the most important parameters. The value of a sorbent is dramatically affected by its longevity. To be economically viable, the typical sorbent must survive tens if not hundreds of thousands of loading and unloading cycles. The model can also be used to investigate the interactions between different sorbent parameters. For example, the correlation between loading capacity and cycle time makes it possible to determine the cycle time that optimizes the economics of an air capture device.Our analysis highlights the significance of some neglected parameters in air capture cost analysis such as cycle duration and stability of the sorbent. Finally, the analysis can also be adapted to post-combustion flue gas sorbents.