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

The performance of NH₃-based CO₂ absorption under static magnetic field conditions was examined. The removal efficiency of CO₂, CO₂ load, and absorption capacities were investigated 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 NH₃, and reaction temperature. The initial removal efficiency of CO₂ reached 98.5% by 10 wt.% NH₃ solution under static magnetic field conditions, and it was 7% higher than that under the no magnetic field conditions. The effect of magnetic field on CO₂ load and absorption capacity was more obvious when the inlet CO₂ concentration in the simulated flue gas is 10 vol.%, the CO₂ load increased 11.7% from 1.45 mol/L to 1.62 mol/L, and the absorption capacity increased from 0.668 kg CO₂/kg NH₃ to 0.738 kg CO₂/kg NH₃. Compared with the absorption of CO₂ under static magnetic field conditions and no magnetic field conditions, the absorption process of CO₂ was enhanced by the magnetic field, and the removal efficiency of CO₂, CO₂ load, and absorption capacity demonstrated superior performance.