【摘要】 基于Aspenplus软件,根据Gibbs自由能最小化原理对煤气化置换燃烧过程进行热力学平衡分析。对徐州烟煤以NiO作为载氧体,研究在常压时燃料反应器温度、水煤比对燃料反应器气体产率和载氧体循环倍率的影响。结果表明:燃料反应器温度的降低有利于煤气化产物的氧化;水蒸气用量较少时可得到较高浓度的CO2;燃料反应器温度的降低和水蒸气用量的减少将减少载氧体循环倍率。更多还原

【Abstract】 Based on Aspen plus,the thermodynamic equilibrium of coal gasification and chemical-looping combustion process is analyzed according to the principle of Gibbs free energy minimization.For Xuzhou bituminite,with nickel oxide as an oxygen carrier,the influence of fuel-reactor temperature and steam-coal ratio on the gas yields from fuel reactor and the circulation ratio of the carrier under normal atmospheric pressure is discussed.The results show that the lowing of fuel-reactor temperature facilitates the oxidation of gasification;less steam results in higher concentration of CO2;the circulation ratio of the carrier will go down with the reducing of the fuel-reactor temperature or the amount of the steam used.更多还原