化學迴路程序為一新穎的燃燒系統，具有高效燃燒與分離二氧化碳的功能，其反應器系統的設計、載氧體流體化以及其與燃料接觸時間，均會影響反應效率。本研究以澳洲鐵礦石為載氧體，以實場廢液異丙醇與實場廢液石刻後殘留物消除劑為燃料，於1kWth之交聯式流體化床進行化學迴路程序。藉由改變載氧體運行量、燃料反應器、空氣反應器與密封迴路的氣體流量，在不同的溫度下進行化學迴路程序燃燒，同步量測各反應器內壓力分佈、提升管的壓力差以估算固體循環速率，並分析燃燒後尾氣的組成。此系統中空氣反應器為流化床形式，燃料反應器端為鼓泡床形式，載氧體在兩者間穩定運行以達到較高CO2選擇率。
實驗結果顯示，氧化反應器空氣流量為 4.5 L/min與封閉迴路氮氣流量為 3.5 L/min時，燃料反應器分以液體流量 1 mL/min搭配氮氣流量5 L/min，以及液體流量4.5 mL/min搭配氮氣流量1L/min為最佳參數。影響操作程序的關鍵為液體的完全汽化，其原因為若氣流量的不足無法進行流體化導致載氧體深度還原引起燒結現象，最終系統堵塞。廢液轉化率達100%且CO2 選擇率與純度可高於80%。載氧體的磨耗特性顯示，天然鐵礦適合運用在交聯式流體化床，在5小時的運行中，磨損量為0.83 wt%，顯示其適用於液體為燃料之化學迴路程序。

Chemical-Looping Combustion (CLC) process is a novel combustion system with the high combustion efficiency and able to separate CO2 from exhaust without extra energy consumptions. The reaction rate is deeply affected by the design of the reaction system, fluidization of the oxygen carrier, and the contact time between oxygen carrier and fuel. In this study, two kinds of liquid wastes isopropanol and EKC, were selected as fuel for chemical-looping combustion, which was carried out in the 1kWth interconnected fluidized bed with using Australian iron ore as oxygen carrier. The datum of pressure drop of each reactor were collected under variant operation conditions to estimate the solid circulation rate. The effect of gas flow rate of fuel reactor (FR), air reactor (AR), and loop seal (LS), solid inventory, reaction temperature, and kind of solvent waste on the composition of the exhaust gas were investigated.
In this system, the air and fuel reactors were fast-fluidized bed and bubbling bed, respectively. The oxygen carriers were transported stably between these two reactors for achieving a high CO2 selectivity. The optimal operation parameters for high CO2 yield rate were obtained at 3.5 L/min of nitrogen to LS, 4.5 L/min to air of AR, and 5 L/min of nitrogen and 1 mL/min of solvent to FR. The maximum solvent feeding rate was 4.5 mL/min with 1 L/min of nitrogen as carrier gas. The vaporization of the liquid played the key role in this combustion process. The system will be defluidized resulted from the insufficient gas flow rate. The oxygen carrier was sintered due to the deep reduction in a dead zone. In conclusion, the complete decomposition of solvent waste was achieved with over 80% of CO2 selectivity and purity. The small attrition loss rate (0.83 wt% for 5h) of the oxygen carriers showed that the practicality of natural Australia iron ore for chemical-looping-combustion process.

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