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AZ31B镁合金废片-盐水体系能同时产生氢气和Mg(OH)2,研究了催化剂,Cl-浓度和反应温度对该体系产氢速率的影响,并分析了产物Mg(OH)2的化学成分和形态结构。实验结果表明,与Cu Cl2相比,铜线作为催化剂不仅产氢的速率高,且不会污染形成的Mg(OH)2。Cl-浓度和反应温度影响对体系产氢速率有较大影响,当温度为60℃,盐水浓度为4 mol/L时产氢速率达到最大值为62 m L/(min·g)。采用扫描电镜、X射线能谱仪表征分析中间产物,探讨Cl-点蚀反应的机理,对产物氢氧化镁粉末进行表征和物相分析的结果表明,产物为高纯度Mg(OH)2纳米材料,其晶体结构和分散性随温度的增加变好,80℃下获得规整的六方晶体。
The effect of catalyst, Cl- concentration and reaction temperature on the hydrogen evolution rate of AZ31B magnesium alloy wastes - brine system can be simultaneously produced by hydrogen and Mg (OH) 2. The chemical composition of Mg (OH) 2 And morphological structure. The experimental results show that, compared with Cu Cl2, copper as a catalyst not only produces hydrogen at a high rate, but also does not pollute the formed Mg (OH) 2. The effect of Cl- concentration and reaction temperature has a great effect on the hydrogen production rate. When the temperature is 60 ℃ and the brine concentration is 4 mol / L, the maximum hydrogen production rate is 62 m L / (min · g). The intermediate products were characterized by scanning electron microscopy and X-ray energy dispersive spectroscopy, and the mechanism of Cl-pitting reaction was discussed. The results of characterization and phase analysis of the product magnesium hydroxide powder showed that the product was high purity Mg (OH) 2 nanomaterial , Its crystal structure and dispersibility become better with increasing temperature, and regular hexagonal crystals are obtained at 80 ℃.