隨著天然資源的高度利用，石油及天然氣等能源日益耗竭致使油價不停地在漲，嚴重影響了民生問題。如何善用醞藏最豐富的煤炭，成為未來能源發展的首要目標。而煤炭氣化複循環發電技術(IGCC)具有技術成熟性、能源效率高及符合環保需求等優點，將會是未來的發電主流之ㄧ。現在商業運轉之大型煤炭氣化複循環發電機組(IGCC)皆使用溼式商業化之除硫程序，而溼式除硫必須使用大量冷卻水，使系統熱效率降低為其缺點，為克服此問題以提高熱效率、降低發電及環保成本，利用高溫下乾式除硫方法將是未來的趨勢。
本研究以重金屬廢水污泥經高溫合成之鐵氧磁體作為高溫脫硫的吸收劑，可以兼具資源回收再利用及淨潔材料的目的，研究成果分為以下幾點探討：

1.了解鐵氧磁體吸收劑於多次脫硫－再生後利用率有無衰退的情形，以及吸收劑隨之的變化，結果發現在第二次脫硫後，吸收劑的脫硫效果逐漸提升。

2.以不同操作參數來觀察鐵氧磁體吸收劑利用率改變的情形，包括CO、 H2、H2S的濃度變化與溫度、空間流速的差異對吸收劑利用率的影響。

3.由氧化/還原氣氛之熱重分析觀察鐵氧磁體吸收劑的重量變化。還原氣氛下，鐵氧磁體高溫下會被還原為低氧化數的氧化鐵，甚至元素鐵；氧化氣氛，發現有部分之脫硫後鐵氧磁體會先轉為FeSO4，之後才繼續氧化成為鐵氧磁體。

4.利用XRD、BET、SEM、XPS等分析來觀察脫硫前後吸收劑的變化，以上的分析結果皆證明了碳化鐵的存在以及對脫硫效果的影響。

5.由動力模擬研究發現，第一型衰退模式較能模擬脫硫反應。

To change with each passing day, natural resources is used greatly. The price of gasoline raises because of energy depletion, and it affects the people's livelihood. In order to meet this demand, how to use the most abundant energy of coal as well as improving the efficiency of energy production technologies is being carried out. IGCC (Integrated Gasification Combined Cycle) is one of the ideal method to solve environmental and economic problem by using fossil fuels, especially coal. Hot gas desulfurization is crucial issue in the development of the IGCC system. Nowadays, all commercial IGCC power plants utilize wet desulfurization processes to remove H2S from hot coal gas. However, coal gas was cooled by the wet processes would be decrease the thermal efficiency of the system significantly. Therefore, high temperature removal of H2S techniques is the targets for the researchers in this field.
Desulfurization of hot coal gas using the sludge from Ferrite Process sorbent in a fixed bed reactor was conducted in this study. It can be one kind of clean and recycle materials. The explanation of results can be divided into five major parts.

1.To understand the changes of Cu-Ferrite after multi-cycle desulfurization. It was found that the utilization was raised gradually after the second sulfurated cycle of Cu-Ferrite.

2.The effects of operating factors, such as CO inlet concentration, H2 inlet concentration, H2S inlet concentration, WHSV, and temperature on the removal of H2S were performed.

3.Thermogravimmetry analysis under oxidation/reduction condition. Under reduction condition, ferrite sorbent will be reducted to low-activity iron oxide even elemental iron. Under oxidation condition, some part of sulfurated ferrite sorbent will be oxidized to FeSO4. It will be continuing oxidized to ferrite sorbent.

4.We use XRD、BET、SEM and XPS to understand the changes of sorbents before and after desulfurization. The results of these analysis prove that FexC exists at the first sulfurated cycle of Cu-Ferrite and it affects the reaction.

5.In the operating range of this study, we can find that the deactivation model type I can simulate the desulfurization reaction.

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