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基于Gibbs自由能最小化原理和Van Krevelen坐标系研究了不同固体燃料在O2气氛下完全气化时的气化特性。结果表明:当固体燃料完全气化时,CO、CO2、H2和H2O摩尔分数变化范围分别为0.4-1.0,0-0.15,0-0.45,0-0.08。当固体燃料H/C比固定时,在低O/C比下,H2和CO含量保持恒定;在高O/C比下,O/C比增加会减少当量氧气比,降低气化温度。气化炉有效能效率随O/C比增加而减小。当固体燃料O/C比固定时,气化温度随H/C比增加而减少,CO含量减少,而H2、CO2和H2O含量增加。
The gasification characteristics of different solid fuels when fully gasified under O2 atmosphere were studied based on Gibbs free energy minimization principle and Van Krevelen coordinate system. The results show that the molar fractions of CO, CO2, H2 and H2O are 0.4-1.0,0-0.15,0-0.45,0-0.08 respectively when the solid fuel is completely gasified. When the H / C ratio of solid fuel is fixed, the content of H2 and CO remains constant at low O / C ratio. At high O / C ratio, the increase of O / C ratio reduces the equivalent oxygen ratio and decreases the gasification temperature. Gasifier effective energy efficiency decreases with increasing O / C ratio. When the O / C ratio of solid fuel is fixed, the gasification temperature decreases with the increase of H / C ratio, the content of CO decreases and the content of H2, CO2 and H2O increases.