The reaction principle for CO₂ capture using ammonia solution was introduced in this paper. Experimental studies for CO₂ capture using ammonia solution were carried out with bubbling reactor. Main influencing factors for CO₂ capture, such as concentration of ammonia solution, CO₂ content, temperature and so on were studied. The research results show that improving concentration of ammonia solution and pH value can increase removing efficiency of CO₂, increasing CO₂ content and flow rate of simulating gas may decline the removal efficiency, and the best removal temperature is 45 ℃. The main product after absorbing CO₂ was analyzed by the method of infrared ray spectrum, and the main component is NH₄HCO₃. The research results have reference value for further development of ammonia method for CO₂ capture .

Key words: ammonia solution, flue gas, carbon dioxide, experimental research