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標題: 奈米碳管觸媒於氣狀污染物之去除研究
Study the removal of gas pollution over carbon nanotube supported catalyst
作者: 薛丁維
Hsueh, Ting-Wei
關鍵字: Chemical vapor deposition;化學氣相沉積法;impregnation;polyol method;cabon nanotubes;CO;含浸法;多元醇法;奈米碳管;一氧化碳
出版社: 環境工程學系所
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奈米碳管擁有良好的物理及化學特性,用來製備奈米碳管金屬觸媒可以利用奈米碳管良好的分散性,增加金屬觸媒與一氧化碳的接觸反應,並獲得大小較平均的金屬活性相。因此,本研究先選用銅、鈷、鐵、鎳並利用化學氣相沉積法(chemical vapor deposition)來製備奈米碳管(cabon nanotubes),分別利用含浸法與多元醇法來製備之奈米碳管金屬銅觸媒,並在相同的空間速度下,以一氧化碳為目標污染物進行實驗探討,以及利用XRPD、FESEM等技術分析金屬觸媒的特性與大小。
實驗結果發現,利用化學氣相沉積法時,使用鐵金屬為奈米碳管之製備觸媒的產率最高約100%。尋找一個合適的空間速度方面中依實驗結果發現最佳的範圍在1.56*104–3.12*104 hr-1之間實驗結果顯示含浸法所製備出來的奈米碳管金屬銅觸媒比用多元醇法製備出來的觸媒尺寸較小,使在進行一氧化碳催化時會有很好的效果。由研究結果發現,含浸法與多元醇法所製備出奈米碳管金屬銅觸媒對一氧化碳的催化有不錯的效果,其中含浸法製備出的金屬活性相,尺寸較小去除效率較高,可以成功去除一氧化碳。

There have been many topics discussed about environmental pollution and these years there has been a rising concern about environmental protection. At present, air pollution is one of the most popular and serious problems caused for environmental damage. The principal factor causing air pollution is from incomplete combustion of petroleum fuels. These discharges the pollutants include hydrocarbons and carbon monoxide (CO). Of all the air pollutants, carbon monoxide is by far the most abundant and damaging pollutant to the human body, not to mention the environment.
Carbon nanotubes is relatively new material used as catalyst support in the oxidation of CO due to its good physicals and chemical characteristics. Carbon nanotubes can enhance the disffusion of active site during the catalyst preparation. In this study, a carbon nanotube (CNT) was used as catalyst support loading with transition metal cobalt (Co) for CO oxidation at low temperature. For this, first we chose four different catalysts namely, copper, cobalt, iron, and nickel to prepare cabon nanotubes by chemical vapor deposition method. Second, the carbon nanotube supported copper catalysts were prepared with impregnation method and the polyols process. Catalyst properties were analyzed by X-ray powder diffractometer (XRD) and Field Emission Scanning Electron Microscope (FESEM).
The experiment results discovered that the yield of carbon nanontube by iron catalyst with chemical vapor deposition was approximately 100%. According to the experimental result, the best space velocity was found in the range of in between 1.56*104-3.12*104 hr-1. The experimental result showed that the active phase on the catalyst preparation with impregnation method was smaller than polyol process, and smaller active phase showed the good performance on CO oxidation.
其他識別: U0005-0702200703020800
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