Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/3520
標題: The selective catalytic reduction of NO with hydrocarbons over Pt on metal-zeolite catalysts
添加鉑於金屬-沸石觸媒進行一氧化氮與碳氫化合物選擇性觸媒還原反應研究
作者: 林建樺
Lin, Chien-Hua
關鍵字: 脫一氧化氮;desorb nitric oxide;選擇性觸媒還原反應;鉑金屬;selective catalytic reduction reaction;Platinum
出版社: 化學工程學系
摘要: 
Due to the serious increasingly problems of air pollution, thus how to effectively control the release of nitroxides becomes to demand immediate attention. Addition of Platinum on Copper and cobalt was introduced into ZSM-5 molecular sieve with ion-exchange method to prepare the catalysts to perform the desorb nitric oxide by selective catalytic reduction reaction. The results have shown that addition of Platinum on copper- and cobalt-ZSM-5 has a promotional effect. The control factors in experiment were concentration of oxygen, methane/nitromonoxide ratio, and reaction temperature, etc.. When the concentration of oxygen, methane/nitromonoxide ratio, and reaction temperature on copper-ZSM-5 were about 1.0%, 1.0, and 400oC respectively and add Platinum were about 1.0%, 1.5, and 400oC respectively, the best reactivity will be obtained. When the concentration of oxygen, methane/nitromonoxide ratio, and reaction temperature on cobalt-ZSM-5 were about lower 1.0%, 1.0 and 400oC respectively and add Platinum were about lower 1.0%, 1.0 and 400oC respectively , the best reactivity will be obtained.The prefect promotional effect by loading optimal ratio of Platinum .If increasing the ratio (concentration of oxygen, methane/nitromonoxide ratio, and reaction temperature), it will make the selectivity of decomposition of nitromonoxide drop and the carbon dioxide will be increased. At the same time, the secondary air pollution will occur. Thus the best selections of catalyst and optimum reaction conditions will be able to effectively control the release of nitroxides and resolve the problems of air pollution.

由於空氣污染問題日益嚴重,因此如何有效的控制氮氧化物的排放成為一個刻不容緩的課題。本研究主要結合鉑金屬及銅、鈷二種金屬與ZSM-5觸媒進行離子交換來製備脫氮氧化物所需要的觸媒,以進行脫一氧化氮之選擇性觸媒還原反應。結果顯示添加鉑於銅及鈷擔持ZSM-5觸媒上確實有促進效果。實驗控制參數為氧濃度、C3H8/NO比例及反應溫度等,Cu-ZSM-5觸媒在氧濃度1% 左右、C3H8/NO = 1.0及400℃有較好之轉化率,而添加Pt後有進一步促進反應之效果出現,最佳轉化效果在氧濃度1.0% 左右、C3H8/NO = 1.5及溫度400℃。Co-ZSM-5觸媒在氧濃度小於1.0%、C3H8/NO = 1.0及溫度400℃時會有較佳的轉化效果,添加Pt金屬在高於400℃能發現良好的促進效果,最佳轉化效果在氧濃度小於1.0%、C3H8/NO = 1.0及溫度400℃。金屬Pt的loading量也必須適量比例才能有最佳的轉化效果。若將這三個反應條件再加大則會造成反應進行NO分解的轉化率降低,產生多餘的二氧化碳,反而造成另一種的空氣污染,因此,選擇最佳的觸媒及最適的反應操作條件,才能有效的控制氮氧化物的排放,解決空氣污染的問題。
URI: http://hdl.handle.net/11455/3520
Appears in Collections:化學工程學系所

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