HYDROGEN PRODUCTION BY MECHANOCHEMICAL REACTION OF ALUMINIUM IN WATER AND ITS LIFE CYCLE ASSESSMENT

采用100个氧化铝球对行星球磨机湿法磨铝制氢进行了试验研究。本工作的精磨速度和时间分别为200rpm和1h。用3g铝粉与100毫升水进行湿法研磨，产生280毫升氢气。认为铝的表面温度随着氧化铝介质的磨损和冲击而升高，水与表面温度达100℃以上的铝表面反应生成氢气。采用窗口转速为5.27m/S的窗式发电机发电1h可制得280ml氢气，与水电解法(电功率3W，发电时间18.7min，氢气量280ml)相比，可减少二氧化碳0.380 g。

In this study, experiments on the hydrogen production by wet grinding of aluminum through planetary ball mill were carried out with 100 alumina balls. Fine grinding speed and time in this work were fixed at 200 rpm and 1 hour, respectively. 280 ml of hydrogen gas was generated through the wet grinding with 3 g of aluminum powder in 100 ml of water. It is considered that surface temperature of aluminum increases from attrition and percussion with alumina medium, and water reacts with the surface of aluminum whose surface temperature reaches more than 100 degree to generate hydrogen gas. 280 ml of hydrogen could be obtained for 1 hour by electric power from window power generator with window speed of 5.27 m/s. Comparing former hydrogen generation method with water electrolysis (electric power : 3 W, generation time : 18.7 minutes, volume of hydrogen : 280 ml), it is found that 0.380 g of CO_2 could be reduced.