Solid Fuel Chemistry ( IF 0.7 ) Pub Date : 2021-12-08 , DOI: 10.3103/s0361521921040029 I. G. Donskoi 1
Abstract
The gasification of solid fuels of different elemental compositions in O2/N2 and O2/CO2 mixtures was studied using equilibrium thermodynamic modeling. The dependences of process characteristics (temperature and the yield of carbon residue) on the composition of gasification agent and the stoichiometric ratio were calculated. The addition of carbon dioxide, on the one hand, promoted the conversion of carbon due to an increase in the concentration of gasifying agents and, on the other hand, decreased the process temperature due to an increase in heat capacity and an endothermic effect of the gasification reaction. The efficiency of using O2/CO2 mixtures for the gasification of fuels increased with the carbon content. The highest chemical efficiency of coke and coal gasification was achieved at an initial CO2 concentration of about 40–60 vol %.
中文翻译:
固体燃料组成对氧气和二氧化碳混合气化过程平衡特性的影响
摘要
使用平衡热力学模型研究了不同元素组成的固体燃料在 O 2 /N 2和 O 2 /CO 2混合物中的气化。计算了工艺特性(温度和残炭产率)对气化剂组成和化学计量比的依赖性。二氧化碳的加入一方面由于气化剂浓度的增加而促进了碳的转化,另一方面由于热容和吸热效应的增加而降低了工艺温度。气化反应。O 2 /CO 2使用效率用于燃料气化的混合物随着碳含量的增加而增加。焦炭和煤气化的最高化学效率是在初始 CO 2浓度约为 40–60 vol% 时实现的。