Effect of magnetic field on the ammonia‐based CO₂ absorption process

Abstract

The performance of ammonia‐based CO2 absorption under static magnetic field conditions was discussed. The removal efficiency of CO2, CO2 load, and absorption capacities were studied using a bubble reactor system. The CO2 removal efficiencies, CO2 load, and absorption capacity under static magnetic field conditions were calculated at four kinds of different operating conditions, which included CO2 concentration in flue gas, gas flow rate, concentrations of aqueous ammonia, and reaction temperature. The results indicated that the initial removal efficiency of CO2 can reach 98.5 % by 10 wt% ammonia solution under static magnetic field conditions, and it is 7 % higher than that under the no magnetic field conditions. The effect of magnetic field on CO2 load and absorption capacity is more obvious when the inlet CO2 concentration in the simulated flue gas is 10 vol%, the CO2 load increases 11.7 % from 1.45 mol/L to 1.62 mol/L, and the absorption capacity rises from 0.668 kgCO2/kgNH3 to 0.738 kgCO2/kgNH3. Compared with the absorption of CO2 under static magnetic field conditions and no magnetic field conditions, the absorption process of CO2 is enhanced by the magnetic field, and the removal efficiency of CO2, CO2 load and absorption capacity show superior performance.

Counter-Intuitive Magneto-Water-Wetting Effect to CO2 Adsorption at Room Temperature Using MgO/Mg(OH)2 Nanocomposites

“…They applied both an electric and magnetic field, parallel or perpendicular to the linker direction of the GOF and reported that there was no significant change in the GOF to CO 2 adsorption by a magnetic field. Another study by Zhang et al [36] presented the performance of ammonia-based CO 2 adsorption under static magnetic field conditions, where the adsorption capacities were studied by a bubble reactor system. When comparing the absorption of CO 2 under static magnetic field conditions and no magnetic field conditions, it was found that under the magnetic field, the absorption capacity of CO 2 and the removal efficiency of CO 2 were enhanced in ammonia-based sorbents.…”

Improvement of CO2 absorption by Fe3O4/water nanofluid falling liquid film in presence of the magnetic field

“…CO 2 capture using nanofluids has been proposed to improve absorption efficiency, and higher efficiency leads to lower energy consumption. [ 6–10 ]…”

“…CO 2 capture using nanofluids has been proposed to improve absorption efficiency, and higher efficiency leads to lower energy consumption. [6][7][8][9][10] There have been several studies on mass transfer enhancement in absorption processes using nanoparticles in water as it is a readily available, inexpensive, and biocompatible base fluid. [10][11][12][13][14][15][16][17][18][19][20][21] Esmaeili Faraj et al [22] studied H 2 S absorption with a water-nanofluid mixture using exfoliated graphene oxide (EGO) nanoparticles in a bubble column.…”