雙電解槽電解水產氫於多電極組下之效能研究

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陳彥廷(Yen-Ting Chen) 查詢紙本館藏

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機械工程學系

論文名稱

雙電解槽電解水產氫於多電極組下之效能研究
(Parameter analysis of hydrogen production by Multi-electrode dual cell water electrolysis)

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摘要(中)

能源議題是21世紀人類面臨的一項重大挑戰，各國紛紛以開發可再生能源作為其主要目標，因此如何有效地儲存間歇性能源，「氫」在當中即扮演重要角色，「氫能經濟」也被視為安全且可持續性的能源解決方案。
本研究採用電解水方式產氫，以質子交換膜分隔陰、陽兩極，雙液電解槽的實驗設計，降低電解水的分解電壓，並且使用工業廢液H_2 ?SO?_4、KOH作為電解液，能夠同時解決化學品過剩的問題。透過電解液濃度、施加電壓、電極間距、並聯電極組數等參數設計，探討各參數對於產氫能源效率的影響，再將最佳參數組合與業界相比較，以發揮本研究之商用價值。
實驗結果顯示，提高電解液濃度，電解水反應的實際電解電壓隨之下降，其中又以40wt%濃度效果最佳，其實際電解電壓為0.7V。在能源效率方面，於低施加電壓條件下，多電極的裝置降低了整體電阻，擁有較高的能源效率，其中在30wt%濃度、施加電壓2V、並聯三組電極、電極間距6mm最佳參數條件下，效率為96.74%，此結果與業界相比，具備足夠的競爭力。
關鍵字：水電解、多電極、質子交換膜

摘要(英)

The issue of energy is a major challenge for mankind in the 21st century, and countries have to develop renewable energies as their main energy resources. Among energy resources, hydrogen is considered to be one of most promising energy carriers. How to effectively produce and store,” hydrogen” plays an important role in ”hydrogen economy”.
　　In this study, water electrolysis is used to produce hydrogen.Two cells, filled with acid and alkaline electrolytes , are separated by proton exchange membrane. The advantage of acido-alkaline electrochemical cell is to reduce the decomposition voltage of water electrolysis. Furthermore, industrial waste liquids, such as sulfuric acid and potassium hydroxide, can be used as electrolytes, and problem of excess chemicals can thus be reduced. In this thesis,the influence of working parameters, such as electrolyte concentration, applied voltage, inter-electrode distance and the number of electrode groups, on the energy efficiency of hydrogen production was discussed
　　Experimental results show that the decomposition voltage decreases with the increase of electrolyte concentration, especially the decomposition voltage is reduced to 0.7V at concentration of 40wt%. For energy efficiency, the device with multiple electrodes reduces the resistance and has a higher energy efficiency under low applied voltage.A efficiency of 96.74% is presented under the conditions of electrolyte concentration 30wt%,applied voltage 2V, 3 electrode groups in parallel,and inter-electrode distance 6mm. It shows that this acido-alkaline electrochemical cell is highly competitive and can be applied in many commercial applications.
Key words: Water electrolysis；Proton exchange membrane(PEM)；Multi-electrode

關鍵字(中)

★ 水電解
★ 多電極
★ 質子交換膜

關鍵字(英)

論文目次

摘要 I
ABSTRACT II
目錄 IV
表目錄 VIII
圖目錄 IX
符號說明 XII
第一章緒論 1
1-1 前言 1
1-2 文獻回顧 3
1-2-1 水電解歷史發展 3
1-2-2 電解槽的分類 4
1-3 研究目的與動機 6
第二章理論基礎 8
2-1 電解水產氫之基本原理 8
2-2 分解電壓 9
2-3 實際電解電位 10
2-4 法拉第電解定律 11
2-5 極化作用 11
2-5-1 濃度極化 11
2-5-2 活性極化 12
2-5-3 歐姆極化 13
2-6 離子輸送數 13
2-7 離子交換膜 14
2-8 導電度 16
2-9 燃料熱值 16
2-10 效率 17
2-11 電流 17
2-12 產氫量 17
2-13 多電極並聯 17
2-14 氫氣熱值 18
2-15 電功率 18
2-16 能源效率 18
2-17 能源效率影響因子 19
第三章實驗裝置 21
3-1 實驗用品 21
3-1-1 實驗藥品 21
3-1-2 實驗材料 21
3-2 實驗儀器 23
3-2-1 直流電源供應器 23
3-2-2 溫度量測器 23
3-2-3 磁石攪拌器 23
3-2-4 氣體質量流量計 24
3-2-5 質子交換膜 24
3-3 實驗架設 24
3-4 實驗變數 25
3-5 實驗步驟 25
3-5-1 實際電解電位的量測 25
3-5-2 產氫量之量測 27
第四章結果與討論28
4-1 電解液濃度對實際電解電位之影響 28
4-2 不同電解參數對產氫之影響 30
4-2-1 不同施加電壓對產氫之影響 31
4-2-2 不同電極間距對產氫之影響 32
4-2-3 不同電極組數對產氫之影響 34
4-3 雙槽電解水產氫之可行性驗證 37
第五章結論與未來展望 40
5-1 結論 40
5-2 未來展望 41
參考文獻 42
表 48
圖 52

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指導教授

洪勵吾

審核日期

2017-9-15

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