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T. Esaki et al. 4. Conclusions This study carried out CO2 separation with consideration to scaling up and de- veloped a PSA method for CO2 collection. A model was built for the income and expenditure system of the substance in the adsorption tower, and the heat, mo- mentum, and migration in the tower were estimated by numerical analysis. The physical properties of the analysis model were obtained by experiment, and the consistency between the experimental result, which was obtained using a bench-scale adsorption tower, and the developed analysis model was investi- gated. The following conclusions were drawn from this study: 1) The migration phenomenon of the substance in the tower, the energy, and the momentum were expressed in the C programming language, and the analysis model of a possible PSA route was established. The CO2 density at the adsorp- tion tower, absorbed amount, temperature, and flow distribution in the PSA driving process were investigated, and the influence on the CO2 collection was confirmed to be higher compared with that in the analysis result. 2) The breakthrough opening time in the CO2 adhesion breakthrough test was 830 s, the CO2 density in the tower was balanced, and breakthrough was in- itiated. This result is identical to the opening time in the bench scale experiment. 3) With a CO2 concentration of 93.4% in the captured gas and a CO2 quantity of 2.9 ton/day, twice as much CO2 was obtained from the density of CO2 col- lected by PSA driving. This value is approximately equal to the value of the ad- sorption tower in the bench scale experiment. Additionally, this model can be useful as an analysis tool in future scale-up studies. Conflicts of Interest The authors declare no conflicts of interest regarding the publication of this pa- per. References [1] Aaron, D. and Tsouris, C. (2005) Separation of CO2 from Flue Gas: A Review. Se- paration Science and Technology, 40, 1-3, 321-348. https://doi.org/10.1081/SS-200042244 [2] Kodama, A., Seo, M., Miyashita, Y. and Osaka, Y. (2013) Separation of a Simulated Biogas Mixture (Methane-Carbon Dioxide-Wate Vapor) by Pressure Swing Ad- sorption with SAPO-34. Kagaku Kougaku Ronbunshu, 39, 503-507. [3] Choi, W., Kwon, T, Yeo, Y., Lee, H., Song, H. and Na, B. (2003) Optimal Operation of the Pressure Swing Adsorption (PSA) Process for CO2 Recovery. Korean Journal of Chemical Engineering, 20, 617‒623. https://doi.org/10.1007/BF02706897 [4] Anshul, A. and Lorenz, T.B. (2010) A Superstructure-Based Optimal Synthesis of PSA Cycles for Post-Combustion CO2 Capture. AIChE Journal, 56, 1813-1828. https://doi.org/10.1002/aic.12107 [5] Hirano, S. (2008) The Effect of Macropore of Zeolite Adsorbents for Dynamic Ad- sorption Properties. TOSOH Research & Technology Review, 52, 55-60. (In Japa- nese). DOI: 10.4236/msce.2021.93004 52 Journal of Materials Science and Chemical EngineeringPDF Image | Analysis of CO2 Pressure Swing Adsorption
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