关键词: 化学链制氧, 煤气化, 集成系统, 热力学分析, 过程模拟

Abstract: Chemical looping air separation （CLAS），as a promising oxygen production technology，was employed as an alternative of conventional air separation technique. A novel technique for integrated coal gasification system with CLAS was presented in this article. This novel system has been simulated and calculated by Aspen Plus software based on the Gibbs free energy minimization principle. The results presented that the H2，CO and CH4 showed slightly change with the change of reduction temperature as well as the temperature of gasification gas when reduction temperature was above 840℃，at the same time the cold gas efficiency was about 80%. The increase of circulation ratio of CO2 could lead to a decrease in steam consumptions and result in the increase of CO and cold gas efficiency. Gasification pressure had little influence on H2，CO and CH4. The cold gas efficiency was reduced and the temperature of gasification gas was increased with the increase of gasification pressure.

Key words: chemical looping air separation, coal gasification, integrated system, thermodynamic analysis, process simulation