English  |  正體中文  |  简体中文  |  Items with full text/Total items : 50123/85142 (59%)
Visitors : 7909760      Online Users : 63
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/109450


    Title: FUEL CONCENTRATION AND OPERATING TEMPERATURE EFFECTS ON CRITICAL AMOUNTS OF CATALYSTS ADDED TO THE FUEL CHANNELS OF DIRECT METHANOL FUEL CELL
    Authors: Y. D. KUAN;W. J. LUO;C. C. CHANG;I. WELLID;Z. Y. ZHENG;C. N. CHEN
    Keywords: DMFCs;Rounded turns;Active carbon;Selenium;Fuel concentration;Critical catalyst proportion
    Date: 2016-12-09
    Issue Date: 2017-02-18 02:10:36 (UTC+8)
    Publisher: the Academy of Romanian Scientists
    Abstract: This study modifies the geometry of fuel channel corners in order to reduce the hydroresistance of the fuel within the channels, and investigates fuel concentration and operating temperature effects on the loading weight percentages of catalysts added to the fuel channels. The intent of the study is to further improve the output efficiency of DMFCs (direct methanol fuel cells). In this study, different proportions of catalysts, including active carbon and selenium (Se), were coated onto anode and cathode channels composed of PDMS (polydimethylsiloxane) to promote a fuel decomposition reaction in the fuel channels. The output of the DMFCs was measured under different operational temperatures and different supply fuel concentrations in order to find suitable catalyst loading values under different operational conditions. The experimental results indicate that under identical operating conditions, the performances of DMFCs can be greatly boosted using rounded channel turns rather than right angle turns. Furthermore, the results indicate that critical catalyst loading values exist for each catalyst under different operating temperatures. Suitable coating weight percentages for each catalyst are recommended for different operating temperatures. It was found that under lower operating temperatures and lower fuel supply concentrations, the effect of adding catalysts to fuel channels on the performance enhancement of DMFC is more apparent than for cases with higher operating temperatures and fuel supply concentrations. We also found that the fuel concentration effect on the performance of DMFCs was not apparent for a range of fuel concentrations investigated under the same operating temperature. In other words, while the fuel cells are under operation, even the supplied fuel concentrations vary, although not beyond operational concentration limitations. The effects of concentration variations on the performance of DMFCs with catalysts added to the channels can therefore be neglected.
    Relation: Digest Journal of Nanomaterials and Biostructures 11(4), p.1327-1341
    Appears in Collections:[物理學系暨研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat
    FUEL CONCENTRATION AND OPERATING TEMPERATURE EFFECTS ON CRITICAL AMOUNTS OF CATALYSTS ADDED TO THE FUEL CHANNELS OF DIRECT METHANOL FUEL CELL_全文.pdf2048KbAdobe PDF34View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.


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