Ammonia is a promising CO₂ capture solvent, but the volatile characteristics limit its large-scale application. In this study, the CO₂ desorption features from ammonia rich solution are analyzed theoretically and experimentally, with the metal ions as additives to reduce ammonia emission. The influences of suction temperature, ion adding and CO₂ loading rate on the CO₂ desorption and ammonia escape are investigated. The results show that the rates of CO₂ desorption and ammonia escape increase greatly as the rising of the temperature to a certain extent. The addition of divalent metal ions (Ni, Cu and Zn) can promote the CO₂ desorption process and inhibit the ammonia escape during the regeneration, with the ammonia emission reduced by 26.2%, 9.7% and 9.6%, respectively. Ni(II) presents the excellent inhibitory effect on ammonia escape and the strong effect on carbon dioxide desorption enhancement owing to the greater complexation between metal ions and free ammonia than Cu(II) and Zn (II). The additives of divalent metal ions are recommended during the regeneration process of ammonia decarbonization to enhance the CO₂ desorption and inhibit the ammonia escape at the cost of less energy consumption.

氨是一种很有前景的CO ₂捕集溶剂，但其挥发性特点限制了其大规模应用。在这项研究中，从理论上和实验上分析了富氨溶液中CO ₂的解吸特性，并以金属离子作为添加剂以减少氨的排放。研究了吸气温度、离子加入量和CO ₂负载率对CO ₂解吸和氨逃逸的影响。结果表明，随着温度的升高，CO ₂解吸率和氨逃逸率在一定程度上都有较大的提高。二价金属离子（Ni、Cu和Zn）的加入可以促进CO ₂解吸过程，抑制再生过程中氨气逸出，氨气排放量分别减少26.2%、9.7%和9.6%。由于金属离子与游离氨之间的络合程度大于 Cu(II) 和 Zn(II)，Ni(II) 对氨逃逸具有优异的抑制作用，对二氧化碳解吸增强作用更强。建议在氨气脱碳再生过程中加入二价金属离子添加剂，以提高CO ₂解吸能力，抑制氨气逸出，同时降低能耗。