煤加氢气化的化学热力学模型预测

综合运用化学平衡和热力学平衡对于给定煤种的加氢气化反应建立了通用的热力学数学模型。用于预测气化炉出口的煤气成分、产量等。并利用该模型计算分析了煤加氢气化直接生成CH4的过程,主要分析了反应温度及压力对加氢气化反应的平衡常数和平衡转化率的影响。用化学动力学方法建立数学模型,通过计算获得主要气体产物与反应温度和压力之间的关系,以及气化过程中氢气系数对最终气体产物的影响。 A thermodynamic mathematical model,which combines the chemical equilibrium and the thermodynamic equilibrium of the global reaction,was developed in this paper for the process of coal hydrogasification.The final composition and the concentration of gas products can be predicted by this model.The dependence of reaction equilibrium constants and equilibrium conversion rate of hydrogasification on the temperature and pressure were also analyzed thereafter for the methane production.The main product of the coal hydrogasification and its dependence on temperature and pressure were predicted using this model,and also the influence of hydrogen coefficient on the final gas product