製備具高除污能力活性碳應用於去除氮氧化物之研究

氮氧化物為氣狀污染物的一種，是酸雨產生的原因之一，也是化學煙霧的前驅物，還會導致紫外線輻射量增加。活性碳為高比表面積之產物，因此有不錯的吸附能力，並廣泛應用於去除污染物。本研究使用水熱合成法用以製備碳球，並經由不同比例的K2CO3進行化學活化得到活性碳，其中AC3:1(K2CO3: activated carbon)比表面積可達1909.4M2/g，孔徑為2.554nm為中孔結構(2~50nm)。粒徑分析結果中，0.149~0.25mm孔徑約占35~38%，0.106~0.149 mm孔徑約占43~47，小於0.106 mm孔徑約占17~18%。 AC3:1、AC1:1與市售產品各取1g活性碳在流量500mL/min下，對NOX濃度1200ppb與4600ppb進行吸附測試，本研究製備之A3:1、AC1:1與市售活性碳的一開始去除效率相差大約6~9%，但是5小時候的去除效率相差大約17~23%，AC3:1的累積吸附量比市售活性碳要多66%。 A3:1、AC1:1與市售活性碳的一開始去除效率相差大約1~3%，但是5小時候的去除效率相差大約12.6~27.7%，AC3:1的累積吸附量比市售活性碳要多49%。

關鍵字

水熱合成法；氮氧化物；碳球；吸附

並列摘要

Nitrogen oxides are gaseous pollutants, which are the cause of acid rain and precursors of chemical fumes, which also lead to an increase in the amount of ultraviolet radiation. Activated carbon is a product of high specific surface area, so it has good adsorption capacity and is widely used to remove contaminants. In this study, carbon spheres were prepared by hydrothermal synthesis. Activated carbon was prepared by using different proportions of K2CO3. The specific surface area of activated carbon AC3:1 (K2CO3: activated carbon) was 1909.4 M2/g, and the pore size was 2.554 nm. 50nm). In the particle size analysis results, the pore size of 0.149~0.25mm accounts for 35~38%, the pore size of 0.106~0.149 mm accounts for 43~47, and the pore size of 0.106mm is about 17~18%. Activated carbon AC3:1, AC1:1 and commercial products for adsorption test, take 1g activated carbon, flow rate 500mL / min, adsorption test for NOX concentration 1200ppb and 4600ppb, A3:1, AC1:1 and city prepared in this study The initial removal efficiency of activated carbon sold differs by 6 to 9%, but the removal efficiency differs by 17 to 23% at 5 hours, and the cumulative adsorption capacity of AC3:1 is 66% more than that of commercially available activated carbon. A3:1, AC1:1 differs from the initial removal efficiency of commercially available activated carbon by 1~3%, but the removal efficiency at 5 hours is 12.6~27.7%, and the cumulative adsorption capacity of AC3:1 is 49% better than commercial activated carbon.

並列關鍵字

hydrothermal synthesis ； nitrogen oxides ； carbon spheres ； adsorption

參考文獻

1.Arnal, P. M.,et al.Chemistry of Materialc,2006,18,2733-2739。

Google Scholar

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