Issue 69, 2018

Optimum operating parameters of CO2 sorption in turbulent fluidized bed regime using potassium carbonate supported on gamma alumina solid sorbent

Abstract

The promising solid sorbent, potassium carbonate (K2CO3) supported on gamma alumina (γ-Al2O3) was prepared through impregnation by insertion into the sorption turbulent riser to determine the optimum operating parameters. A sorption temperature of 60 °C, superficial gas velocity of 0.22 m s−1, and initial sorbent loading of 5 g were determined to be the optimum conditions so that 93 percent of the actual loaded K2CO3 could react with CO2 to obtain the highest CO2 sorption capacity at 279.95 mg of CO2/g of K2CO3. 23 factorial design plus center points were used to analyze the result of the main effect and interaction between the operating parameters. The sorption temperature, superficial gas velocity, and sorbent loading all impacted the response parameter. From the obtained interpretation, interaction between sorption temperature and superficial gas velocity, as well as between sorption temperature and initial sorbent loading, portrayed statistically significant effects on CO2 capture capacity. Calculations showed that concentration of treated gas was greatly reduced. This distinguished breakthrough behavior provided a step toward designing a continuous reactor to maximize CO2 capture. However, one major obstacle for this design was the persisting formation of hydrated potassium dawsonite, a side product of conventional heat regeneration.

Graphical abstract: Optimum operating parameters of CO2 sorption in turbulent fluidized bed regime using potassium carbonate supported on gamma alumina solid sorbent

Article information

Article type
Paper
Submitted
09 oct. 2018
Accepted
13 nov. 2018
First published
27 nov. 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 39678-39690

Optimum operating parameters of CO2 sorption in turbulent fluidized bed regime using potassium carbonate supported on gamma alumina solid sorbent

S. Boonprasop, S. Sangteerasintop, B. Chalermsinsuwan and P. Piumsomboon, RSC Adv., 2018, 8, 39678 DOI: 10.1039/C8RA08335E

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