有許多工業製程都會產生大量的含氨( NH3 )廢氣，若後續處理不當將對環境及人體造成危害。此外，在以選擇性觸媒還原法( Selective Catalytic Reduction , SCR)處理 NOx 的場合中也存在未反應之 NH3 外逸( NH3-slip )的問題。本研究嘗試利用鐵氧磁體觸媒( Ferrite Catalyst )將氣流中的 NH3 轉化成無害的 N2 和 H2O。實驗結果顯示使用單一活性金屬時以 Mn-ferrite 的效果最佳，Cu-ferrite 次之。若將 Cu、Mn 二種金屬都合成進入鐵氧磁體中則可進一步提升催化能力。Mn0.75Cu0.25Fe2O4為最佳觸媒，在NH3進流濃度= 1000 ppm、空間速度= 3000hr -1 條件下，其轉化率約於 180℃ 時達到 50%，200℃時達到 90%，且僅需 225℃即可將 NH3 完全去除。此外，在反應產物的選擇率上也表現優異，必須 250℃以上才會產生 NOx。
實驗前後之鐵氧磁體觸媒以 XRD 鑑定發現晶相沒有差異。BET 比表面積分析鐵氧磁體觸媒的比表面積約 44.9 m2 /g 左右。

There are many industrial processes that produce a large amount of ammonia (NH3) waste gas, which will cause harm to the environment and human body if the subsequent treatment is improper. In addition, there is also the problem of unreacted NH3-slip in the case of treating NOx by Selective Catalytic Reduction (SCR). The research attempts to use Ferrite Catalyst to convert NH3 in the gas stream into harmless N2 and H2O. The experimental results show that when using a single active metal, Mn-ferrite has the best effect, followed by Cu-ferrite. If both Cu and Mn are synthesized into the ferrite magnet, the catalytic ability can be further improved. Mn0.75Cu0.25Fe2O4 is the best catalyst. Under the conditions of NH3 inflow concentration 1000 ppm and space velocity 3000hr-1, its conversion rate reaches 50% at about 180°C and 90% at 200°C, and only NH3 can be completely removed at 225°C. In addition, it is also excellent in the selectivity of reaction products, and NOx is generated only when the temperature is above 250°C.
The ferrite magnet catalyst before and after the experiment was identified by XRD and found no difference in crystal phase. BET specific surface area analysis shows that the specific surface area of the ferrite magnet catalyst is about 44.9 m2/g.

摘要 III
Abstract IV
誌謝 VI
目錄 VII
表目錄 X
圖目錄 XII
第一章 緒論 14
1-1 研究背景 14
1-1-1 氨氣的特性與危害 15
1-1-2 氨氣的處理技術 17
1-2 研究目的 19
第二章 文獻回顧 20
2-1 觸媒處理 NH3 之文獻回顧 20
2-2 觸媒焚化反應動力探討 24
2-2-1 觸媒催化反應原理 24
2-3 鐵氧磁體程序法 26
2-3-1 鐵氧磁體之特性 27
2-3-2 鐵氧磁體之合成 29
2-3-3 鐵氧磁體合成法之影響因子 30
2-3-4 鐵氧磁體之應用 33
2-4 觸媒成型 34
第三章 研究方法及實驗設備 37
3-1 研究方法 37
3-1-1 實驗規劃 37
3-1-2 觸媒製備與焚化裝置 38
3-1-3 實驗步驟與方法 42
3-2 實驗設備 44
3-2-1 觸媒製備與觸媒焚化設備 44
3-2-2 實驗分析設備 46
3-3 試藥及氣體 52
第四章 結果與討論 54
4-1 活性中心金屬的篩選 54
4-2 雙活性金屬鐵氧磁體觸媒對催化效果的影響 57
4-2-1 粉狀觸媒與粒狀觸媒效能之比較 61
4-3 觸媒焚化氨氣操作參數探討 63
4-3-1 氨氣濃度 63
4-3-2 空間速度 66
4-4 觸媒材料性質分析 69
4-4-1 X 射線繞射分析( XRD ) 69
4-4-2 比表面積分析( BET ) 70
4-5 Mn0.75Cu0.25Fe2O4 觸媒在 De-NOx 反應中的表現 71
4-6 以鐵氧磁體觸媒處理NH3反應產物分析 73
4-7 綜合討論 76
第五章 結論 80
參考文獻 81

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