| Title |
Physical and reactive absorption of CO2 in capillaries: Mass transfer, modelling and produced chemical species |
| ID_Doc |
8910 |
| Authors |
Morales, DO; Regalado-Méndez, A; Pérez-Alonso, C; Natividad, R |
| Title |
Physical and reactive absorption of CO2 in capillaries: Mass transfer, modelling and produced chemical species |
| Year |
2023 |
| Published |
|
| DOI |
10.1016/j.cherd.2023.08.045 |
| Abstract |
In a circular economy and sustainability context, CO2 utilization is key. For photochemical or electrochemical transformations, CO2 absorption in liquids has become crucial and even a limiting step. This work aimed to establish an average mass transport coefficient (kLa) characteristic of the CO2 absorption in water and in alkaline solutions in capillary absorbers (2-4 mm) under Taylor flow and recirculation mode. A correlation among prevailing dimensionless numbers (Sh, Re, Ca and Sc) was also established. To achieve so, the absorption of CO2 was conducted in both, water and NaOH solutions (0.5 mol/dm3), and its concentration was monitored by measuring total inorganic carbon and pH. The gas and liquid flowrates used for the tests were 1.66x10-4 L/s and 2.5x10-4 L/s, respectively. The effect of temperature was investigated in the range of 283 and 308 K. The highest kLa was found to be 12 x 10-2 and 2.1 x 10-2 s1, for water and NaOH solutions, respectively. The modelling and simulation of the carbon species formation and production was also conducted and a determination coefficient (R2) of 0.99 was found. (c) 2023 Institution of Chemical Engineers. Published by Elsevier Ltd. All rights reserved. |
| Author Keywords |
Capillary reactors; CO 2 reactive absorption; CO 2 transport correlation; CO 2 mass transfer; Taylor flow |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001150052900001 |
| WoS Category |
Engineering, Chemical |
| Research Area |
Engineering |
| PDF |
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