煤浆电解制氢的动力学研究

研究了煤浆电解过程中电压、温度、H₂SO₄浓度、Fe³⁺浓度等因素的影响,并进行了电解前后煤粉样品的热重测试和电解后溶液的成分分析。结果表明,电压、温度、添加的Fe³⁺浓度、H₂SO₄浓度等参数对电解过程的电流密度有较大影响。其中,温度对电流密度的影响符合阿伦尼乌斯方程,在电解电压1 V条件下煤浆电解活化能为31.87 kJ/mol。TGA和ICP分析表明,电解后煤中的部分金属离子溶入溶液,导致结构和灰分成分发生了较显著的变化。

Effect of kinetic factors on hydrogen production by coal slurry electrolysis

For understanding the influence of kinetic factors on coal slurry electrolysis, the voltage, temperature, and H₂SO₄ and Fe³⁺ concentration were studied. The samples of electrolyzed coal and fresh coal, and composition of the supernatant liquid after electrolysis were analyzed respectively by TGA and ICP. The results show that the parameters of voltage, temperature, Fe³⁺ and H₂SO₄ concentration have effect on the current density in the electrolysis. Furthermore, the relationship between the temperature and current density follows the Arrhenius equation. The apparent activation energy of the coal slurry electrolysis is 31.87 kJ/mol at 1 V voltage. TGA and ICP characterization prove that some metal elements in the coal are dissolved into the solution. The coal structure and ash content have obvious difference before and after the electrolysis.