全球暖化日益嚴重，因此碳捕捉以及封存已經是世界各國致力發展之技術，其中又以化學迴路燃燒程序不需耗費大量成本以及資源就可以將二氧化碳分離出來，使其後續捕捉二氧化碳更輕易。在化學迴路燃燒程序中又以載氧體為整個反應迴圈之核心，載氧體之反應性質會影響整體反應的進行，由於載氧體之製備非常的耗時耗力且成本相當高，因此本實驗評估天然錳礦運用於化學迴路燃燒程序之可行性。
經過500℃熱處理之錳礦其主要成分為(Mn, Fe)2O3，所以本實驗先使用Mn2O3以及Fe2O3利用機械混和之方式將其混和均勻，並將混和均勻之樣品於高溫下進行鍛燒得到(Mn, Fe)2O3粉體。之後利用X光繞射儀鑑定材料成分與結構、場發射掃描式電子顯微鏡觀察粉體之微觀結構以及熱重分析儀測試(Mn, Fe)2O3載氧體對合成氣、氫氣及甲烷之反應活性和反應機制。
將錳鐵複合載氧體粉體以及錳礦粉體於實驗出之最佳製備及操作參數於熱重分析儀和實驗室級半套式流體化床反應器進行測試，其於多圈氧化/還原反應中具有良好之性能，因此錳礦作為載氧體運用於化學迴路燃燒程序中將具有很大之潛力。

As the global warming issue worsens gradually, the Carbon Capture and Storage (CCS) techniques have been a goal to be committed for each government worldwide. Among the techniques of CCS, The chemical-looping combustion (CLC) process is a novel solution for efficient combustion with direct separation of carbon dioxide. The process uses a metal oxide as oxygen carrier to transfer oxygen from air to fuel reactor, where the fuel reacts with solid oxygen carrier. Unfortunately, the preparation of Oxygen carrier is time consuming and costly. Therefore, this study devotes to assessing the reaction by using manganese ore as the Oxygen carrier of CLC process.
After calined at 500℃, the main compound of manganese ore is (Mn, Fe)2O3. Therefore, this study firstly investigated the reactivity of (Mn, Fe)2O3 as oxygen carriers in CLC process. (Mn, Fe)2O3 powder was prepared by mechanical stirring Mn2O3 and Fe2O3 in a high temperature solid-state reaction. The crystalline phases of the powder were identified by X-ray diffraction (XRD), surface morphology of powder was analyzed with Field-Emission Scanning Electron Microscopy (FE-SEM) and the mechanism of reduction behavior was determined by Thermogravimetric Analyzer (TGA).
(Mn, Fe)2O3 was tested under optimized parameters and process, then applied to FxBR and Fluidized Bed Reactor (FBR). The results show the feasibility of using the (Mn, Fe)2O3 systems as candidate of oxygen carrier in a reversible chemical looping combustion process.

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