CAJ | 학술논문

利用化学链制氧（chemical looping air separation，CLAS）取代传统空气分离制氧技术，提出了基于化学链制氧的煤气化集成系统。以Mn2O3/Mn3O4为氧载体，依据Gibbs自由能最小化原理，利用Aspen Plus对该集成系统进行模拟研究。结果表明，当还原温度高于840℃时，还原程度和粗煤气温度不随还原温度增加而发生明显变化，H2、CO 和 CH4流量及含量变化趋势较平缓，冷煤气效率为80%左右；随 CO2循环比增大，水蒸气用量逐渐减少，粗煤气中H2流量和含量降低，CO流量和含量升高，CH4流量和含量基本不变，冷煤气效率升高，粗煤气温度降低。气化压力变化对粗煤气中 H2、CO 和 CH4流量和含量无明显影响，气化压力升高会降低冷煤气效率，提高粗煤气温度。
이용화학련제양（chemical looping air separation，CLAS）취대전통공기분리제양기술，제출료기우화학련제양적매기화집성계통。이Mn2O3/Mn3O4위양재체，의거Gibbs자유능최소화원리，이용Aspen Plus대해집성계통진행모의연구。결과표명，당환원온도고우840℃시，환원정도화조매기온도불수환원온도증가이발생명현변화，H2、CO 화 CH4류량급함량변화추세교평완，랭매기효솔위80%좌우；수 CO2순배비증대，수증기용량축점감소，조매기중H2류량화함량강저，CO류량화함량승고，CH4류량화함량기본불변，랭매기효솔승고，조매기온도강저。기화압력변화대조매기중 H2、CO 화 CH4류량화함량무명현영향，기화압력승고회강저랭매기효솔，제고조매기온도。
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.