水合物法高炉煤气脱除二氧化碳的热力学模型研究

提出了将水合物法应用于高炉煤气的脱碳提质.选择正四丁基溴化铵（TBAB）作为热力学促进剂，并基于Chen-Guo水合物热力学模型，对高炉煤气在TBAB溶液中水合物的生成压力进行计算预测.将模型用于含高炉煤气部分组分+TBAB体系的水合物的生成压力计算，计算结果与文献中实验值进行比较，平均相对误差在3 %~16 %左右；而对不同浓度组成的CO₂+CO+N₂+H₂+水体系的水合物生成压力的计算结果比较，平均相对误差在7.5 %~11.7 %左右；用压力探索法测得高炉煤气+TBAB体系水合物的相平衡实验数据，并与计算值进行比较，平均相对误差为16.6 %，表明模型在一定程度上可预测高炉煤气在TBAB溶液中水合物的相平衡条件. 

Research on thermodynamic model for the removal of carbon dioxide in blast furnace gas by hydrate method

The application of hydrate method to the removal of carbon dioxide in blast furnace gas was proposed. Tetra-n-butyl ammonium bromide (TBAB) was selected as the thermodynamic promoter. Chen-Guo hydrate thermodynamic model was applied to calculate and predict the pressure of gas hydrate in TBAB solution. The model was used to calculate the pressure of hydrate containing part of blast furnace gas +TBAB, with the average relative error between the calculation result and experimental value in the literature being about 3 %~16 %. The average relative error between calculation results of the hydrate pressure of CO₂+CO+N₂+H₂+water of different concentrations and values in the literature was 7.5 %~11.7 %. Comparing the experimental data of blast furnace gas +TBAB measured by pressure exploration with the calculation results, we found that the average relative error was 16.6 %, which indicated that the model could predict the phase equilibrium condition of blast furnace gas in TBAB solution.