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in the decompression attachment and removal process, CO2 was pulled in by the pulsometer and collected at the entrance of the upper part of the tower. At the lower part of the tower, N2 and CO2 fluid flow occurred at the exit. 3.3. CO2 Concentration and Recovery Ratio With regard to the CO2 density and CO2 collection rate, the electric power of the pulsometer yielded twice as much and the CO2 with the driving of the adsorp- tion tower compared with that considered in the analysis. This result was com- pared with the experimental result obtained for the adsorption tower by the bench scale experiment. The analysis results and experimental results are pre- sented in Table 5. The CO2 density is the average CO2 density of the gas ob- tained during the decompression attachment and removal process. The CO2 col- lection rate is the percentage of CO2 collected in the decompression attachment and removal process to the CO2 amount introduced in the adsorption process under elevated pressure. The pulsometer power can be used to calculate the electric power of the pump from the suction pressure and flow rate used in the decompression attachment and removal process. The amount of collected CO2, which is later introduced to the driving through a set of adsorption towers, was standardized in one day. Value equal to the experimental results were mostly obtained in the analysis re- sults. However, the CO2 density was approximately 90% higher than the analysis result. In the adsorption under elevated pressure and washing processes, the CO2 did not flow through the tower exit because the remaining N2 was collected in the pulsometer along with CO2 during the decompression attachment and removal process. It was found that 24% of the CO2 that was introduced by adsorption un- der elevated pressure while driving in the decompression attachment and removal process of 10 kPa could not be collected at the current rate of collection. Com- pared with the analysis result, this is more depended on the outflow to adhesion and outside of the tower caused by the lower part of the tower in the decompres- sion attachment and removal process. The pulsometer power and C, which will later be present in industrial applications, need improvement of the O twice yield. It is necessary to consider that the quantity of the introduced gas flow, and the diameter and height of the adsorption tower, influence the time of each process in the driving of the PSA cycle. With the model used in the analysis, the collected amount increased because 24% of CO2 was not collected. From this point onward, the design factor for scaling up, by which we assume that it is possible to increase the throughput, and the sensitivity analysis results were obtained. Table 5. Accuracy validation for calculation model of PSA cycle. T. Esaki et al. CO2 concentration CO2 recovery ratio Pump powerconsumption for CO2 capture CO2 amount recovered Experiment Analysis unit 91.0 93.4 % 77.0 76.4 % 186.0 196.7 3.2 2.9 kwh/ton-CO2 ton/day DOI: 10.4236/msce.2021.93004 51 Journal of Materials Science and Chemical EngineeringPDF Image | Analysis of CO2 Pressure Swing Adsorption
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