Experimental investigation of CO2 solubility and its absorption rate into promoted aqueous potassium carbonate solutions at elevated temperatures

CO2 Removal via an Environmental Green Solvent, K2CO3–Glycine (PCGLY): Investigative Analysis of a Dynamic and Control Study

“…Hence, the capital cost and operating cost can be optimized. 7 , 8 , 14 In the open literature, the first principal model and complicated rate-based method are commonly found for the dynamic analysis during the MEA–CO 2 absorption process. 11 − 13 Hence, this work uses a simple equilibrium approach with a tuned vaporization efficiency in the standard simulation program of Aspen Plus/Dynamic to observe the transient behavior.…”

“…Potassium carbonate (PC) is well known among CO 2 removal processes, with the addition of promoters being actively investigated. − Process optimization, energy analysis, and economic performance have been extensively studied at the steady-state level, but this study is not sufficient in predicting the operability of the plant in the presence of continuous and sudden system fluctuations. To date, many dynamic studies and modeling are reported for the process of CO 2 –MEA, − though none so far for the K 2 CO 3 system, especially with glycine acting as a solvent promoter.…”

“…This is necessary to achieve the green solvent title as it has low toxicity levels and will also avoid salt precipitation, preventing the presence of acids in the solvent. , In addition to that, the high operating pressure and low concentration of the solvent were successful as the flash tank managed to recover the intended solvent without passing through a stripping column. Hence, the capital cost and operating cost can be optimized. ,, In the open literature, the first principal model and complicated rate-based method are commonly found for the dynamic analysis during the MEA–CO 2 absorption process. − Hence, this work uses a simple equilibrium approach with a tuned vaporization efficiency in the standard simulation program of Aspen Plus/Dynamic to observe the transient behavior. To control the process, many control strategies are proposed ,, and in this study, a basic proportional–integral (PI) feedback control strategy is installed in a closed-loop system. System identification using the pseudorandom binary sequence (PRBS) signal is conducted to generate 5000 data points and exported to the Matlab.…”

“…This is necessary to achieve the green solvent title as it has low toxicity levels and will also avoid salt precipitation, preventing the presence of acids in the solvent. , In addition to that, the high operating pressure and low concentration of the solvent were successful as the flash tank managed to recover the intended solvent without passing through a stripping column. Hence, the capital cost and operating cost can be optimized. ,, …”

Thermally Regenerative CO2-Induced pH-Gradient Cell for Waste-to-Energy Conversion

“…18,19 Herein, a new low-grade thermally regenerative CO 2induced pH-gradient cell (TRCPC) is proposed to recycle waste CO 2 and thereby produce durable electricity. It was designed by using pH-sensitive electrodes in a carbonate-based absorbent, which has unique advantages, including low cost and nontoxicity, and can be regenerated by using low-grade heat 20,21 to allow system cyclability. The TRCPC achieved a satisfying peak power density of 0.578 W m −2 with a long discharge time, which is over 10 times longer than that reported in previous contributions.…”