化學迴路燃燒程序相較於傳統燃燒有多項優勢。此程序利用載氧體在燃料反應器中進行還原反應，產出高純度之二氧化碳；隨後，載氧體進入空氣反應器，由空氣將載氧體氧化至最高氧化態並同時產生熱能。載氧體在兩個反應器中持續循環使用，因而稱化學迴路燃燒。本研究中，製備鐵鎂鋁載氧體並於固定床反應器中評估其綠藻及綠藻-聚丙烯(PP)化學迴圈燃燒之性能。
以鐵鎂鋁金屬莫爾比為6:1:3之FMA613載氧體在1000 ℃ 鍛燒4小時之條件下展現出良好的反應性及循環性。藉由XRD晶相分析，主要晶相為尖晶石結構之MgFe2O4。在合成氣氣氛下進行還原反應，MgFe2O4首先被還原為氧化鎂及氧化鐵相，最終轉化為金屬鐵。此外，對於FMA613-1000-4載氧體的還原動力學研究發現，在氫氣氣氛下進行還原反應時，擬合數據符合縮核模型中之R3模型且還原活化能為17.27 kJ/mol。
本研究的後半部分著重於FMA613-1000-4載氧體與綠藻間之化學迴圈燃燒程序。綠藻燃燒實驗中，最佳操作參數為溫度900 ℃、OC/F比為15、氣體流速為500 mL/min。在綠藻-PP化學迴路燃燒中，氣體流速對結果影響不明顯，而最佳操作條件為溫度950 ℃、OC/F比為17。在循環性實驗中，經過4次循環後仍保持穩定。對於NOx排放，顯示生成中間體Fe4N，進而降低NOx排放。對於SO2排放，發現在過量氧氣存在下，SO2會逐漸氧化為SO3，導致SO2出口濃度逐漸減少。

Chemical looping combustion (CLC) process has more advantages than traditional combustion. A high concentration of carbon dioxide is produced by utilizing an oxygen carrier in the fuel reactor for reduction reactions. In this study, Iron-Magnesium-Aluminum (FMA) oxygen carrier was prepared and evaluated for the combustion of algae and algae-polypropylene(PP) in a fixed bed reactor.
The prepared FMA oxygen carrier, with a metal molar ratio of iron, magnesium, and aluminum of 6:1:3 (FMA613), exhibited good reactivity and recyclability when calcined at 1000°C for 4 hours. XRD phase analysis revealed that the main phase of the oxygen carrier was MgFe2O4 with a spinel structure. On the other hand, the reduction kinetics of FMA613-1000-4 oxygen carrier in a hydrogen atmosphere followed the R3 model, with a reduction activation energy of 17.27 kJ/mol.
In the CLC process of FMA613-1000-4 oxygen carrier with algae. The optimal conditions for the combustion of algae were an operating temperature of 900 °C, OC/F of 15, and a flow rate of 500 mL/min. In the combustion of algae and PP, the influence of flow rate was insignificant, while the optimal conditions were operating temperature of 950 ℃ and OC/F of 17. In the recycle test experiments, the system remained stable after four cycles. In terms of NOx emissions, it was preliminarily observed that Fe4N intermediate. Regarding SO2 emissions, it was found that under excess oxygen, gradual oxidation of SO2 to SO3 occurred, resulting in a decrease in SO2 outlet concentration.

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