摘要
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。
Based on the Gibbs free energy minimization theory and Van Krevelen coordinates,studied were the gasification characteristics of various solid fuels in the oxygen atmosphere when the fuels were fully gasified. It has been found that when the solid fuels are fully gasified,the variation ranges of CO,CO2,H2 and H2O mole fraction are 0. 4 to1. 0,0 to 0. 15,0 to 0. 45 and 0 to 0. 08 respectively. When the H / C ratios of the solid fuels are constant,under the condition of O / C ratio being low,the H2 and CO content will be kept constant. Under the condition of the O / C ratio being high,to increase the O / C ratio will decrease both equivalent oxygen ratio and gasification temperature. The exergy efficiency of the gasifier will decrease with an increase of O / C ratio. When the O / C ratios of the solid fuels are constant,the gasification temperature will decrease with an increase of the H / C ratio,the CO content will also drop while the H2,CO2 and H2O content will increase.
出处
《热能动力工程》
CAS
CSCD
北大核心
2014年第5期561-565,575,共6页
Journal of Engineering for Thermal Energy and Power
