本文以20m高濃度醋酸鉀溶液做為二氧化碳(CO2)之吸收/解吸劑，利用底部發泡之高速攪拌氣液反應槽，將進料為15vol%之CO2/ N2混合氣體之吸收效率，從原本傳統填充塔的24%提升到93%。在解吸CO2方面，實驗發現可利用加水至已吸收CO2的醋酸鉀溶液中，進行解吸釋放CO2的程序，在醋酸鉀溶液最佳吸收程度(吸收後溶液pH達8.35以下)下，加入0.6至1.2倍的水量至溶液中可將85-94%的CO2氣體釋放出來。加水解吸後的醋酸溶液，可利用微波進行除水再生程序，當微波功率2,000W、進出料流率45cc/min的條件下，可得高濃度醋酸鉀溶液對每公升CO2的捕獲解吸能耗為1.90×〖10〗^(-4)GJ，能量利用效率高達42.8%。更進一步，若以連續式微波加熱的方式，直接加熱醋酸鉀溶液進行CO2解吸程序，則不但可將加水解吸和微波除水兩步驟簡化為一，更能在相同微波功率下，以進出料流率60cc/min，完成99%的CO2氣體解吸率，且處理每公升CO2所需能量消耗降低至1.43×〖10〗^(-4)GJ，在能耗上較微波除水之再生程序降低了33%。另一方面，本研究透過因次分析，將在高速攪拌氣液反應設備中，對吸收反應速率影響較為重要之參數，如攪拌轉速、葉片直徑、氣體流量、質傳係數及含氣率等，整合歸納成幾個關鍵無因次群，成功擬合 (fitting)出兩條無因次經驗方程式，準確預測本醋酸鉀溶液攪拌吸收CO2系統之power number(Np)和質傳係數(kLa)。透過Np和kLa更全面的了解製程變數和幾何變數交互影響對吸收速率所造成的總體效應，有利於將來做更進一步的反應設備改良，搭配微波加熱解吸的應用，使高濃度醋酸鉀溶液成為一個具商業競爭力之CO2環保吸收劑。

High concentration potassium acetate solution (20m) is used as an absorbent/ desorbent for carbon dioxide (CO2). The use of high-speed sparge stirred gas-liquid reactor with a bottom bubbling enhances absorption efficiency for 15 vol% CO2/N2 mixed gas from 24% to 93%. It is found that adding water into absorbed potassium acetate solution can releasing (desorbing) CO2. The amount of adding water 60-120 wt% can desorbe CO2 from 85-94% in the case that the pH of the solution after absorption is less than 8.35. Microwave can be used on the water removal for potassium acetate regeneration. In addition, another technology of microwave desorption and generation is developed to combine the above two processes and save more than 33% energy consumption. On the other hand, this study also conduct dimensional analysis for high-speed stirred gas-liquid reactor. Several operating parameters are integrated into dimensional groups to predict reaction rate. Two empirical dimensionless equations are successfully fitted to accurately predict the power number (Np) and mass transfer coefficient (kLa) of CO2 absorption system in potassium acetate solution
Through Np and kLa, a more comprehensive understanding of the overall effect on the absorption rate is beneficial to further improvement of the reaction equipment. With the application of microwave desorption and generation, the high concentration potassium acetate solution becomes an environmentally friendly and commercially competitive CO2 absorbent.

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