近年來工業發展造成環境的污染，其中氮氧化物是直接對生態環境影響的重要污染物之一，如何降低氮氧化物的排放是目前重要的課題。本論文實驗觀察氧化銅（CuO）觸媒對一氧化氮（NO）的轉換效能，瞭解氧化銅觸媒使用在工業及日常生活的廢氣處理上可行性。
實驗利用氧化銅觸媒處理模擬燃燒產生的氮氧化物，觀察氧化銅觸媒對氮氧化物的轉換效能。實驗使用的觸媒是將氧化銅鍍附於圓柱狀蜂巢式的多孔性材質之載體表面，每「單位」載體重21克、直徑5.0公分、厚度1.3公分、孔隙數為100孔/in2（孔徑為2mm*2mm）、穿透率為61％、單位表面積為4.85*10-3 m2g-1，而觸媒的氧化銅含量為7.5wt％。
實驗為了模擬廢氣排放的情況，溫度範圍控制在250℃至600℃；廢氣通過觸媒孔道的流速控制在約45cm/s、50cm/s、60cm/s三種流速，並且改變觸媒數量由一「單位」至七「單位」，觀察觸媒數量對轉換效能的影響。實驗並改變一氧化氮濃度（450ppm～1250ppm）以觀察觸媒轉換效能的極限。實驗結果如下：
1. 使用一單位的氧化銅觸媒NO的轉換率可達12％～13％；連續堆疊五單位觸媒時，轉換率僅能提升至20％，而在單位觸媒之間增設氣體混合裝置時，三單位觸媒之轉換率即可達30％，顯示蜂巢式觸媒之轉換效能嚴重的受到質傳限制。
2. 當流速加快時，導致氣體停滯在觸媒表面的時間變短，必須提高溫度才可達到反應條件，因此也導致起始反應溫度提高及最佳溫度範圍減小的影響。而在實驗流速45cm/s～60cm/s時，最佳轉換溫度區間為480℃～580℃之間。
3. NO濃度增加時，轉換率並未明顯改變，亦顯示本研究使用之氧化銅觸媒未達到轉換NO的極限。
本研究顯示，在適當的選擇觸媒載體以降低質傳限制的條件下，CuO對NO之轉換效能可經由增加觸媒量、溫度及流速的控制以提高轉換效能，配合應用在工業廢氣的NO處理，CuO為具相當潛力的觸媒。

In recent years, the development of industry has been resulted in the pollution of environment, where NO emission has effects on visibility, acid rain, and ozone layer, is considered to be one of the most important pollutants to control. Therefore, this thesis research examined the possibility of utilizing low-cost CuO catalyst to reduce NO emission in combustion exhaust gas and the controlling factors on NO conversion were experimentally investigated.
CuO was wash-coated on cylindrical honeycomb substrate. Each unit of catalyst was 21g by weight. The dimension of the cylindrical unit was 5cm1.3cm and the density of channels (2mm*2mm) of the honey-cone was 100/in2. The honeycomb had a cross section opening of 61%. The total surface area of each unit of catalyst was 4.85*10-3 m2g-1 and CuO content was 7.5wt%.
The experiments were controlled at temperatures 250℃ to 600℃ and the gas velocity of 45cm/s to 60cm/s to simulate the exhaust of conventional boilers. The amount of catalyst was also varied from 1 to 7 units. In order to probe the limits of the catalytic conversion, the NO concentration were changed from 450ppm to 1250ppm. The results are as follows:
1. With 1 unit of CuO catalyst, the conversion of NO was 12% to 13%. When increase to 5 units of CuO catalyst, the conversion of NO raised, not linearly however, to 20%. Modifying the system by adding mixing mechanism between catalytic units, the conversion of NO increased to 30% with 3 units of catalyst. This illustrated that the conversion of NO on honeycomb CuO catalyst was mass transfer (diffusion) controlled.
2. Since the residence time of the flow gas in catalytic bed decreased as the flow velocity increased, both the ignition temperatures and the best operation temperatures increased with the flow velocities. Narrower operation temperature ranges were also observed as the flow velocity increased. The best operation temperatures were between 480℃to 580℃, and the velocity is between 45cm/s~60cm/s.
3. As the concentration of NO increased, the percentage conversion of NO was almost invariant. This showed that the catalyst in use had not reached its capability limit chemically.
With adequately arrange of catalyst to eliminate mass transfer limitation, this study showed that the conversion of NO on CuO catalyst can be increased to meet the industry’s demand by suitable controlling of gas flow velocity and reaction temperature, and by adding more catalyst. Although the performance of CuO may not as good as precious metals, the low-cost nature makes CuO a potential competitor to the precious metals used in the conventional catalytic converters.

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