本論文係有關微/奈米鐵粉水熱產氫之研究，探討反應溫度、鐵粉含量、鐵粉粒徑以及觸媒添加量對產氫速率之影響。首先利用市售鐵粉與水反應，發現所產出之氣體冷凝後經氣相層析儀證實為高純度氫氣，且其產氫速率隨反應溫度與鐵粉含量增加而上升，隨鐵粉粒徑增大而下降。又奈米鐵粉產氫速率遠大於微米鐵粉，微米鐵粉在反應溫度低於100℃幾乎觀察不到氫氣的生成，而奈米鐵粉在反應溫度90℃依舊有大量氫氣產生，但奈米鐵粉反應長時間易有燒結現象發生，使反應不完全。其次使用置換反應在微米鐵粉上沉積鈀觸媒，三種不同粒徑之微米鐵粉隨著鈀觸媒沉積量的增加，產氫速率隨之增加，沉積鈀觸媒後45μm鐵粉其產氫效果優於3μm鐵粉，推測係因45μm鐵粉為扁平狀，且其表面有許多深淺不一的裂痕，有助於鐵粉表面積的增加與鈀觸媒的沉積，進而提升與水反應產氫的效能所致。沉積鈀觸媒後的45μm鐵粉，其產氫轉化率可從12.6%提升至98.7%，且三種不同粒徑之微米級鐵粉沉積鈀觸媒後其轉化率均可達80%以上，顯示鈀具有非常良好的催化效果，適用於沉積在各種粒徑及形態之鐵粉上。本研究所發展之鐵粉水熱產氫製程具有成本低廉、產出之氫氣純度極高、製程簡單易於大量生產的優點，極具實用化潛力。

This thesis concerns the hydrothermal generation of hydrogen gas by micron- and nano-iron powders. Investigate the hydrogen generation rate affected by reaction temperature, iron amount, iron particle size and the amount of catalyst added. First, this research used commercially iron reacted with water, finding that the gas of experiment produced after condensation was confirmed to high purity hydrogen by GC, and the hydrogen generation rate increased with increasing reaction temperature and iron amount, decreasing with increasing the particle size of iron. And the hydrogen generation rate of nano-iron much faster than micron-iron.There could not observe hydrogen generation by micron-iron when reaction temperature lower than 100℃, but there were still produced numerous of hydrogen by nano-iron when reaction temperature at 90℃.The nano-iron tended to be sintered if reaction for long time. It will cause the reaction incomplete. Secondly, using replacement reaction deposited the palladium catalyst on the micron-iron. Three different sizes of micron-iron of the hydrogen generation rate increased with increasing the amount of palladium deposited. The hydrogen generation rate of 45μm iron was better than 3μm iron after deposited the palladium on the iron surface, presumably due to there had many varying depth of cracks on 45μm iron surface and the shape of 45μm iron similar to flat, this structure contributed to increase the surface area of iron and deposit the palladium catalyst, then promoted the efficacy of hydrogen generation from iron with water. The conversion of 45μm iron was from 12.6% promoted to 98.7% after deposited the palladium on the iron surface. The conversion of three different sizes of micron-iron could reach above 80% after deposited the palladium on the iron surface. Show the palladium had very good catalytic activity, could deposit on iron for any size and shape.
This study developed the process of hydrothermal generation of hydrogen gas by iron powders had the advantage include: low cost, the hydrogen of generation had high purity, process simple and easy to mass production, exist the potential of practical.

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