| Autor: |
Jamdade S; School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0100, United States., Cai X; School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0100, United States., Allen-Dumas MR; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States., Sholl DS; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States. |
| Jazyk: |
angličtina |
| Zdroj: |
ACS sustainable chemistry & engineering [ACS Sustain Chem Eng] 2024 Oct 25; Vol. 12 (45), pp. 16680-16691. Date of Electronic Publication: 2024 Oct 25 (Print Publication: 2024). |
| DOI: |
10.1021/acssuschemeng.4c06158 |
| Abstrakt: |
To be implemented on climate-relevant scales, direct air capture of CO 2 (DAC) will require large capital-intensive facilities and careful attention to cost minimization. In making decisions among potential sites for DAC facilities, all of the factors that will impact process cost and efficiency should be considered. In this paper we focus on a factor that has previously received little attention in the DAC community, namely variations in atmospheric conditions on hourly time scales and length scales of meters. We present data curated from extensive previous studies of biosphere-atmosphere fluxes with observations of CO 2 concentration, temperature, and relative humidity (RH) with hourly resolution from many sites in North America. These include locations where typical diurnal variations in CO 2 concentration during summer months exceeds 150 ppm. These variations are larger than the seasonal variations that exist between averaged CO 2 concentrations in winter and summer, and they are highly correlated with diurnal variations in temperature and RH. Diurnal variations are dependent on the height above ground at which CO 2 concentrations are measured, with smaller variations existing at heights of 10 m or more than at ground level. We illustrate the potential implications of these short-term variations for the operation and optimization of a DAC process with process-level calculations for a specific adsorption-based process using amine-rich adsorbents.
Competing Interests: The authors declare no competing financial interest.
(© 2024 The Authors. Published by American Chemical Society.) |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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