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    题名: 固態燃料錠水解釋氫之機制研究
    其它题名: Mechanism Study of the Hydrolysis Reaction of Solid Fuel Tablet for Hydrogen Release
    作者: 陳逸航
    贡献者: 淡江大學化學工程與材料工程學系
    日期: 2012-08
    上传时间: 2015-05-06 10:58:37 (UTC+8)
    摘要: 質子交換膜燃料電池系統作為可攜式電源,由於具有高能源使用效率,且成本逐漸降低之下,已成為取代傳統電池之最佳選擇。為克服氫氣儲存的危險性,將氣氫以固態形式儲存可減少此風險,目前以化學氫化物之儲氫量與釋放氫氣能力為最佳。本研究的目的利用固態燃料(硼氫化鈉)錠進行水解釋氫,釋氫的動態希望態達到立即產氫,且能依質子交換膜燃料電池發電量不同,供應不同之氫氣流率,以驅動不同發電量之可攜式3C產品使用。為有效分析固態燃料錠之釋氫機制,利用質能平衡方程式建立固態硼氫化鈉燃料錠水解釋氫之數學模式。第一年計劃中以實驗及模擬的方式求得固態燃料錠之動力學參數,並針對固態燃料錠/觸媒/水量加以分析,找出平穩之氫氣產生曲線,輔以數學模式了解其釋氫的機制。第二年將更進一步以多孔薄膜反應器設計(包含薄膜材質、孔洞大小、厚度等變數),調控水進入固態燃料錠之流量,使此固態燃料錠水解釋氫能產生平穩且能適用於各種3C產品之氫氣流率。
    Proton exchange membrane fuel cell systems had high energy conversion efficiency and often used it as portable power sources. It became a candidate for substituting traditional batteries due to prices keep going down. In order to overcome the danger of hydrogen storage, the chemical hydrodride was used to storage the hydrogen as a solid form. The objective of this research is to generate a step shape curve of the hydrogen release rate for PEMFCs with different levels. A mathematical model was built to describe the experiment which uses solid sodium borohydride and Ru/Al2O3 catalyst tablet as a reactant. The tablet was immersed into water and generated hydrogen. The kinetic parameters can be regressed from isothermal reaction. The operating variables of the system had to be investigated in order to achieve the step shape of hydrogen release rate. The reactor model was used to study the mechanism of solid fuel tablets with high and stable hydrogen release rate. The design purpose of the solid fuel tablet was smooth release hydrogen with different kinds of flowrate. The key point of the hydrogen release with variable and stable were water injection rate. In order to control the water injection rate, the porous membrane was used to adjust the proper hydrogen release rate. The materials, pore sizes and thicknesses of the membrane were investigated to achieve the desire hydrogen release rate for 3C application.
    显示于类别:[化學工程與材料工程學系暨研究所] 研究報告

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