研究生: |
陳偉彥 Chen, Wei-Yen |
---|---|
論文名稱: |
甲醇重組反應器效能最佳化及系統整合 Enhance Efficiency of Methanol Reformer and System Integration |
指導教授: |
曾繁根
Tseng, Fan-Gang 蘇育全 Su, Yu-Chuan |
口試委員: |
黃鈺軫
Huang, Yuh-Jeen 薛康琳 Hsueh, Kan-Lin |
學位類別: |
碩士 Master |
系所名稱: |
原子科學院 - 工程與系統科學系 Department of Engineering and System Science |
論文出版年: | 2018 |
畢業學年度: | 106 |
語文別: | 中文 |
論文頁數: | 68 |
中文關鍵詞: | 甲醇蒸氣重組反應 、水醇比 、濃度梯度 、重組器 、磷酸燃料電池系統整合 |
外文關鍵詞: | SRM, S/C ratio, Gradient concentration, reformer, integrated system with PAFC |
相關次數: | 點閱:3 下載:0 |
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燃料電池為氫能中極具發展潛力的綠色能源,其中甲醇重組反應器可以解決氫氣攜帶不便的缺點。甲醇蒸氣重組(SRM)反應有著最大產氫量、單一相燃料的優勢,常被選為與電池整合的甲醇重組器。而文獻上常以大量觸媒與小流率進行反應以確保低CO與高轉換率以確保對燃料電池傷害的最小化,反而浪費大量觸媒與空間。
本研究藉由瑞士捲流道設計,以相對少量觸媒藉由進料溶液水醇比的配置提高甲醇轉換率與降低反應產出之CO濃度,並控制觸媒顆粒大小以做出濃度梯度,藉此將熱平均在整體流道上,改善整體熱分布,有效增加觸媒壽命。實驗結果顯示重組器最大產氫量可來到510sccm,可提供燃料電池10W的能量。其CO濃度也不過0.13%,將對燃料電池的傷害最小化。以觸媒濃度梯度控制後,其長效性能可以維持在80%轉換率超過48小時。後續與本研究團隊研發之磷酸燃料電池整合,並結合蒸發器做成重組式燃料電池。進一步探討由純氫進料與重組氣體進料的性能差異與問題。
Fuel cells has high development potential beyond the green energy. A methanol reformer can solve the shortcomings of hydrogen carrying inconveniency. Steam reform of methanol (SRM) reaction has the advantage of the highest hydrogen production and single phase fuel, and is often selected as a methanol recombiner integrated with the fuel cell. The literature often reacts large amounts of catalyst with small flow rates to ensure low CO content and high conversion rates to ensure minimal damage to the fuel cell.
In this study, the Swiss-roll channel was designed to increase the methanol conversion rate and reduce the CO concentration with a relatively small amount of catalyst by controlling steam carbon ratio of the feed solution, and control the catalyst particle size to make a concentration gradient. Thus improved the overall heat distribution and effectively increasing catalyst life. The experimental results show that the maximum hydrogen production reach 510 sccm, which can provide 10 W of fuel cell. Its CO concentration is also less than 0.13%, which will minimize damage to the fuel cell. After controlling the catalyst concentration gradient, its long-term performance can be maintained at 80% conversion rate over 48 hours. In the following research, our team integrated the reformer with phosphoric acid fuel cell, evaporator and a water removal device. The problems and differences of the performance between pure hydrogen feed and reformed gas feed were further investigated.
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