火星土壤含水化合物炼铁过程热力学行为分析

Thermodynamic Behavior Analysis of Ironmaking Process of Martian Soil Aqueous Compounds

摘要: 应用物质吉布斯自由能函数算法计算火星土壤还原生成铁资源过程中所发生的热力学反应。研究火星土壤在火星环境中进行炼铁的可行性。本文利用太阳电解水生成氢气对铁资源进行还原，并且只考虑环境气压与火星土壤成分对其还原的影响。热力学计算研究结果表明：火星土壤含有结晶水的化合物进行加热脱水反应发现主要生成的含铁化合物为两种，分别是FeSO₄和Fe₂O₃。通过氢气对含铁化合物进行还原反应，当温度在900℃以上时，反应FeSO₄要比反应Fe₂O₃先发生还原反应。

Abstract: The Gibbs free energy function algorithm was applied to calculate the thermodynamic reaction that occurred during the reduction of iron resources in the formation of Martian soil, to study the feasibility of ironmaking in Martian soil. In this paper, the generation of hydrogen from solar elec-trolyzed water is used to reduce iron resources, and only the influence of ambient pressure and the composition of Martian soil on its reduction is considered. Thermodynamic calculation results show that there are two kinds of iron-containing compounds, FeSO₄ and Fe₂O₃, which are mainly produced by heating and dehydration of compounds containing crystalline water in Martian soil. The reduction reaction is done to the iron-containing compound by hydrogen; when the temperature is above 900˚C, the reaction of FeSO₄ is first reduced, then the reaction of Fe₂O₃.