- 學位論文
酸鹼值及氫氧化鋁粉末對鋁與水化學產氫之影響
Effect of pH value and Al(OH)3 for hydrogen generation of Al/Water system
摘要
本研究透過硝酸鋁所生成的氫氧化鋁與商用的氫氧化鋁,用於鋁/水系統產氫,實驗證明當氫氧化鋁含有NaOH(催化劑),催化鋁/水產氫效果越好,其中以硝酸鋁所生成氫氧化鋁催化鋁/水產氫效果最佳。 藉由改變pH值酸鹼性催化鋁/水產氫的重複添加系統,實驗證明氫氧化鋁含有鹼性(NaOH)能催化破壞Al2O3與Al之間的氧化鋁膜,並改變氫氧化鋁與水混合後的pH值(酸鹼性)；藉由改變添加氫氧化鋁不同比例則會影響其反應速率,結果顯示,當OH-含量越多時會增加產氫的效率,H+含量越多時會抑制產氫的效率。 最後以Al:Al(OH)3:H2O=3:15:50＆3:10:30 pH=7~12為最佳參數,此反應條件下在三分鐘內產氫產率高達95%以上,將此反應用於燃料電池上,所產生的氫氣確實能使燈泡發光。從鋁與水的反應中,本研究揭露出一種快速而簡易的產氫方式。
並列摘要
The study focuses on the synthesis of Al(OH)3 using Al(NO)3 and NaOH. The synthesized Al(OH)3 can promote the hydrogen generation of Al/water system. It proves that the hydrogen generation rate from Al/water system is higher when Al(OH)3 contains residual NaOH. Through the change of pH value, ratio of Al(OH)3 to Al/water, and consecutive addition of Al powders to the Al/water system, we have higher hydrogen generation rate when OH- concentration is higher. The rapid generation system of Al:Al(OH)3:H2O at 3:15:50＆3:10:30 using pH=7~12 has demonstrated a more than 95% yield production of hydrogen within 3 mins. When we use the generated hydrogen for a fuel cell, it indeed turn the bulb on, The present study has discovered a fast and simple way to generate hydrogen gas from Al/water activation.