镁水反应的实验研究及机理初探

为了研究低温下镁与水的反应,分析了添加剂种类、添加剂含量、二次包覆处理对Mg/H2O反应生成氢气量的影响。结果表明,所选的添加剂多数能促进Mg/H2O反应的进行,并提高反应生成氢气的量;随添加剂含量的增加,氢气的生成量有一定程度提高,但并非呈简单的线性关系;二次包覆处理,不仅可使Mg粉与水产生氢气的量增加,而且还提高了Mg粉贮存性能。初步分析认为,添加剂的加入改变了Mg与水反应体系的酸碱性,促进了该反应的进行。

Experimental investigation and mechanism exploration on reaction between Mg and water

The effects of different additives,content of additive and re-modified surface of magnesium powder on magnesium/water reaction at low temperature were investigated by measuring the generation quantity of hydrogen.The results show that most of the selected additives can accelerate magnesium/water reaction and promote generation of hydrogen.With the increase of the additives content,the generation quantity of hydrogen increases to a certain extent,but it is not a linear relationship.The re-modification of the surface of magnesium powder can not only promote generation quantity of hydrogen,but also improve storage performance of Mg powder.It is concluded that the additives can change pH value of reaction system,which accelerates magnesium/water reaction.