2024-04-25 米国国立標準技術研究所(NIST)
＜関連情報＞
- https://www.nist.gov/news-events/news/2024/04/nist-develops-new-testing-system-carbon-capture-fight-against-global
- https://pubs.acs.org/doi/10.1021/acs.iecr.2c04050
CO2の直接空気捕集に関連する動的カラムブレークスルー測定装置を改良 Improved Apparatus for Dynamic Column-Breakthrough Measurements Relevant to Direct Air Capture of CO2
W. Sean McGivern, Huong Giang T. Nguyen, and Jeffrey A. Manion
Industrial & Engineering Chemistry Research Published:May 17, 2023
DOI:https://doi.org/10.1021/acs.iecr.2c04050
Abstract
Dynamic column-breakthrough (DCB) measurements are valuable for characterizing the adsorption of gaseous species by solid sorbents and are typically used for high concentrations of adsorptives, often at elevated temperatures and pressures. However, adsorbents for the direct capture of carbon dioxide (CO2) from natural air demand measurement capability at low partial pressures of CO2 at atmospherically relevant temperatures and pressures. We have developed a new apparatus focused on the measurement of DCB curves under typical tropospheric conditions. The new apparatus is described in detail and validated with breakthrough curve measurements. Samples of 13X zeolite on the order of a few hundred milligrams have been tested using a low CO2 concentration gas mixture, and adsorption capacities are reported at 233.1–323.1 K and total pressures of 351–1078 hPa. Measurement uncertainties related to timing, flow, temperature, and concentrations are analyzed, and the present results at 273, 298, and 323 K are compared with static measurements obtained with a manometric adsorption analyzer. In addition, experiments at a typical atmospheric CO2 concentration of 400 μL·L–1 have been performed.
