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題名:以電漿濺鍍技術製備鈀-銀合金薄膜於氫氣分離之研究    
Study of Palladium-Silver Alloy Thin Film for Hydrogen Separation by Plasma Sputtering Technology
著者:陶惟翰(Wei-Han Tao) ;楊淑卿(Shu-Ching Yang) ;林修正(Andrew Lin)
出版地區:台灣
出版城市:台北市
學科:自科綜合 ; 應科綜合
關鍵字:燃料電池 ; 鈀銀合金薄膜 ; 氫氣滲透 ; 電漿濺鍍 ; Fuel cells ; Palladium silver thin film ; Hydrogen permeation ; Plasma sputtering
刊名:華岡工程學報
卷期:13期(1999.6)
頁碼:151-169
語言:繁體中文
摘要: 中文摘要PDF ; 英文摘要PDF

目前主要的燃料電地技術包括鹼性型( AFC ) ,磷酸型( PAFC ) ,質子交換模型( PEMFC ) ,熔融碳酸鹽型( MCFC )及國態氧化物型等五種,由於車輛及小型攜帶型電池需於較低溫下操作,以及高電流密度再加上無腐蝕性液體溢出等需求。PEMFC 除合乎上述條件且可提供高濃度氫氣燃料故目前較適合國內發展, 但此種低溫條件導致電極中的白金觸媒產生嚴重一氧化碳毒害,因一氧化碳傾向附著於觸媒表面而阻止氫氣之吸咐,故燃料氣在進入燃料電池前必須有進一步氣體純化以便一氧化碳濃度降低至水蒸氣重組器可接受之範圈。 本文主要以實驗方法來研究鋁銀合金無機薄膜於水蒸氣重組中之氯氣分離,由於把銀合金薄膜對氫氣有良好選擇性,故可產生9 9 . 9%高純度氧氣,此薄膜僅允許氧氣擴散通過其金屬結構悶不允許其它氣體滲透。雖然此技術目前面臨較貴的材料成本與高操作滲透壓力,本研究為降低成本與提昇氫氣在把銀合金膜的滲透壘,以電漿躇鍍技術將記銀合金鍍在多孔質陶瓷或不鏽鋼載體上形成支撐式7 7%記制2 3 %銀合金膜組成,並減少膜之厚度至今1 0 μ m '可在不影響薄膜強度之下來減低成本。152此種支撐式把銀合金膜除可應用於分離與純化氫氣,更可應用於甲醇的水蒸汽重組反應,藉由將氯氣至反應系統中直接移餘,避免受到熱力學平衡的限制,以達到蜂低反應溫度的作用。
Currently, there are five types of fuel cells technologies which are Alkaline Fuel Cells (AFC), Phosphoric Acid Fuel Cells (PAFC), Proton Exchange Membrane Fuel Cells (PEMFC), Molten Carbonate Fuel Cells (MCFC) and Solid Oxide Fuel Cells ( SOFC). Owing to the low temperature operation, high electrical density and free of corrosive electrolysis releasing, it is suitable for the transportation vehicles and batteries. In a number of projects, when it is used to develop fuel cell processors to provide a hydrogen-rich fuel, the PEMFC system for transportation applications becomes preferred. However, the presence of carbon monoxide tends to poison the platinum electrocatalyst under the low temperature operation conditions. CO preferentially adheres onto the catalyst surface and thus prevents the hydrogen adsorption necessary for the electrochemical reaction. Therefore, it is necessary to include ~ another stage of gas purifier prior to entering the fuel cell so as to reduce the carbon monoxide concentration to an acceptable level for the reformer. In this research the palladium silver alloy inorganic thin film was experimentally investigated to attest its ability to separate the hydrogen from the steam reformer. Owing to the high hydrogen permeability, the use of Pd-Ag alloy membrane at the exit of the processor can be used to produce 99.9% ultra pure hydrogen for the fuel cell. The membrane of Pd-Ag alloy allows the hydrogen to diffuse through its metallic crystal structure whilst impermeable to the remaining gases produced by the reformation process. Although currently, the technology is expensive due to materials cost and high operating pressure. Research is presently underway to focus on developing much thinner 77% Pd23% Ag alloy membranes (5-10 microns) supported on porous ceramics or stainless steel by plasma sputtering technology. Reductions in cost and operating pressures are experimentally investigated without compromising the membrane strength. This supported membrane not only will be used to separate or purify the hydrogen but also to get separate hydrogen-rich gas from methanol-steam reforming system without the thermodynamic equilibrium limitation.


    

本卷期目次
華岡工程學報 13期 (1999.6)
Impact of Educational Reform on Engineering and Technology Education in Taiwan/ Franklin Fong-Ming Lee
建築物室內建材之揮發性有機物檢測分析研究/ 陶惟翰周淑梅張志成
Lossy Transmission Line Analysis in Large-scale Circuits by Using Relaxation-based Methods/ Chun-Jung Chen
鰭管式熱交換器熱傳性能比較/ 張峻榮都源展陳文智陶惟翰
以電漿濺鍍技術製備鈀-銀合金薄膜於氫氣分離之研究/ 陶惟翰楊淑卿林修正
非晶與奈米晶材料之探討及成立「非晶與奈米材料研發中心」芻議/ 李豐明
Reanalysis of Fatigue Life Assessments of Butt Welds/ Wen-Ching Chen
雨點軟接觸之施力及施力矩分析/ 鐘文遠
The Composite Structure Affect on the Mechanical Properties of Ni-25Al-xFe Intermetallics/ C. H. Tsau
飛行追蹤控制系統之?定性、可觀察性及可控制性分析/ 張松國
A Simple Algorithm of Beam Propagation Analysis Employing the Runge-Kutta Method/ Rong-Terng JuangChih-Feng HuangDeh-Ming ShyuKeh-Yi Lee
一種改良SDP最少項數的網路可靠度演算法/ 劉熙海劉齊祥吳維揚吳榮芳楊惠婷
無機?充材對PE/PET廢纖板之阻燃效果/ 李貴琪洪麗婷
 
   
 
   

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