於二氧化碳分離與回收技術中，以化學溶劑吸收法研究最多，也被認為最經濟可行，於實驗室研究中發現，以氨水吸收二氧化碳的吸收效果佳。本研究中主要是利用半連續式的噴霧塔反應器來吸收二氧化碳，並探討再生吸收二氧化碳至飽和之氨水溶液，及其再生的效率與吸收容量之變化。研究成果分述如下：
(1) 以不同的氨水濃度，加入氫氧化鈣以進行再生反應，研究中發現以1%氨水溶液，其再生效果最佳可達68.39%，其次為3%與5%之氨水溶液。
(2) 以不同的氫氧化鈣加藥量進行再生，發現以Ca(OH)2/CO2=1.5/1、1/1、0.75/1(莫耳比)，不同之計量比下進行再生實驗，發現當計量比Ca(OH)2/CO2=1.5/1、1/1時，並無明顯之差異性，而其再生效率及吸收容量均較計量比Ca(OH)2/CO2 = 0.75/1為高。
(3) 以不同的再生時間下進行再生，並分別於密閉之系統中進行攪拌再生及不攪拌再生，由結果顯示，利用攪拌器再生，其再生反應較佳，於進行十分鐘後已達穩定。
(4) 以氫氧化鈣再生循環吸收四次，發現隨著再生次數的增加，氨水之吸收容量呈現出一定之衰退性，使得氨水溶液之吸收容量由1.67降至0.27 kgCO2/kgNH3。
(5) 分別以氧化鈣與氫氧化鈣再生氨水吸收液，發現以氫氧化鈣再生氨水溶液之吸收容量與再生效率較以氧化鈣再生效果佳。
(6) 我們可由氨水實驗所得之CO2吸收容量進行推估吸收之反應所產生之產物應以碳酸銨為主，而非碳酸氫銨。

Among these techniques of various technologies have been tested to remove and recover CO2 from flue gas streams. Chemical solvent absorption methods have been extensively studied and are considered as a reliable and relatively low cost method for reducing CO2. The process of ammonia scrubbing is a promising technology in reducing the greenhouse effect.
This study was conducted a semi-continuous flow experiments to absorb the CO2 gas in the spray tower reactor. To determine the absorption capacity and the regeneration efficiency after regenerated the absorbed NH3 solution. The explanation of results can be divided into five major parts.
(1) The effect of the NH3 solution concentration: we can find the regeneration efficiency using Ca(OH)2 to regenerate the absorbed NH3 solution, and the maximum regeneration efficiency can achieve 68.39% under 1% NH3 solution.
(2) The effect of the mole ratio of Ca(OH)2/CO2: we can find the regeneration experiment under the different mole ratio of Ca(OH)2/CO2 = 1.5/1, 1/1, 0.75/1, the result shows the mole ratio of Ca(OH)2/CO2 = 1.5/1, 1/1, it is no significant changes about the absorption capacity and the regeneration efficiency,but is higher than the mole ratio Ca(OH)2/CO2 = 0.75/1.
(3) The effect of the regeneration time: the result shows the efficiency of regeneration happened in the agitated vessel reactor is higher than that reacted under 10 min in the close system.
(4) The absorption capacity the NH3 solution decreases after regenerated four times,and the result shows the absorption capacity decreases from 1.67 to 0.27 kgCO2/kgNH3.
(5) The Ca(OH)2 have the higher absorption capacity and the regeneration efficiency among Ca(OH)2 and CaO reagent to regenerate NH3 solution.
(6) We can predict the main production of the reaction between CO2 and ammonia is (NH4)2CO3 from accounting the absorption capacity.

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