Abstract: Ammonia-based carbon capture technology can meet the CO₂ capture requirements of various industrial flue gases at relatively low costs and has been successfully applied in multiple fields. Current research primarily focuses on issues such as suppressing ammonia volatilization, while fundamental studies on the changes of various parameters during the solution absorption process remain insufficient. Investigating the variation patterns of these absorption process parameters not only helps enhance carbon dioxide absorption efficiency but also enables control over crystal morphology and particle size distribution according to the demands of practical applications. In this study, utilizing a self-designed ammonia-based carbon capture bubble reactor system, we investigated the effects of different physical and chemical factors on the crystallization behavior of ammonium bicarbonate. Coordinated characterization techniques, including Scanning Electron Microscopy （SEM）, X-ray Diffraction （XRD）, and Fourier Transform Infrared Spectroscopy （FTIR）, were employed to analyze the microscopic characteristics, compositional makeup, and chemical bonding types of the crystals under varying conditions.Experimental results indicate that low-to-medium rotational speeds favor stable crystal growth, while higher speeds increase reaction rates. The position of the magnetic field and the addition of magnetic particles significantly influence the crystallization process. The introduction of an antisolvent enhances the crystallization rate but alters crystal morphology and particle size. Maintaining the rotational speed between 350 r/min and 450 r/min during crystal growth promotes stable development by reducing shear forces and minimizing crystal damage. The addition of magnetic particles significantly extends the stable CO₂ absorption period of the mixed solution, thereby improving crystallization stability. Furthermore, an appropriate amount of ethanol does not alter the chemical composition of the crystals but effectively enhances crystallization efficiency. This research aims to elucidate the crystallization behavior of ammonium bicarbonate in ammonia-based carbon capture processes, providing valuable insights and data support for crystallization control in carbon capture applications.