淡江大學機構典藏:Item 987654321/101652
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 62822/95882 (66%)
造訪人次 : 4019811      線上人數 : 1002
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧：
  • 您可在西文檢索詞彙前後加上"雙引號"，以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋，建議至進階搜尋限定作者欄位，可獲得較完整資料
    •  進階搜尋


    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/101652


    題名: 固態硼氫化鈉控制釋放產氫之模式建立與設計
    其他題名: Modeling and design of solid NaBH4 controlled release systems for hydrogen generation
    作者: 鄭仰軒;Cheng, Yang-Hsuan
    貢獻者: 淡江大學化學工程與材料工程學系碩士班
    陳逸航;Chen, Yih-Hang
    關鍵詞: 固態硼氫化鈉;薄膜;控制釋放;設計;氫氣;Solid NaBH4;membrane;Controlled release;design;Hydrogen
    日期: 2014
    上傳時間: 2015-05-01 16:13:18 (UTC+8)
    摘要: 本研究利用Nylon 6,6 多孔性薄膜控制固態硼氫化鈉溶解釋放速率，使系統重量降低。以一次放氫為目標值，提供穩定氫源供給燃料電池發電，做為電子產品備用電源。透過多孔奈龍(Nylon 6,6)高分子薄膜，將液態水透過高分子之孔洞導入固態硼氫化鈉錠進行溶解，溶解後之硼氫化鈉溶液藉由濃度差擴散至外部溶液，經由系統設計與操作，可改變硼氫化鈉控制釋放速率。首先針對本系統建立質能平衡之數學模式，並與實驗結果進行印証比對模式之準確度。透過靈敏度分析，找出影響硼氫化鈉釋放量之設計與操作之主要變數各為：1. 薄膜厚度、薄膜尺寸，2. 操作溫度、外部水量。由模擬結果顯示，影響硼氫化鈉釋放速率之變數為薄膜厚度與薄膜面積，影響硼氫化鈉釋放之拖尾現象主要為內部水量。在實際應用上可透過改變操作溫度與溶液pH值來降低內部水量，以釋放拖尾之現象。最後，將鈷硼，釕觸媒置於外部溶液進行硼氫化鈉水解產氫之確認。
    The objective of this work is to lighten the system weight by using Nylon 6,6 porous membranes to control release of solid NaBH4 tablets. This device provided stable hydrogen flowrate for PEMFC 3C product back-up power. Water permeated Nylon 6,6 porous membranes to dissolve solid NaBH4. The dissolved NaBH4 solution with a saturated concentration back-diffused through the porous membrane by concentration difference. In order to control the NaBH4 diffusion flux, mathematical models were built to describe the solid NaBH4 controlled release systems. The experiment was set-up. The external NaBH4 concentration was measured by iodine titration method once every 30 mins. The simulation result fit with experiment result well. After sensitivity analysis was made, design and operating variables of NaBH4 controlled release systems are: The membrane thickness, membrane area, operating temperature and external solution volume. The simulation result shows the membrane thickness and membrane area dominated the NaBH4 flux. The NaBH4 flux tail was affected by the internal volume. In real applications, operating temperature and solution pH value can be used as a manipulated variable to adjust internal volume. Finally, Co-B and Ru catalysts were placed in the external volume to promote NaBH4 hydrolysis reaction for hydrogen generation.
    顯示於類別:[化學工程與材料工程學系暨研究所] 學位論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    index.html0KbHTML177檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋