煤焦与水蒸气气化反应热力学分析.pdfVIP

38 4 Vol38 No4 2010 4 CoalScience and Technology Apr. 2010 谢继东, 徐振刚, 姜 英 (, 100013) : 为研究煤气化反应的热力学过程, 以煤气化反应中最重要的煤焦与水蒸气反应过程为研究 象, 反应热效应吉布斯自由能平衡常数平衡转化率进行了分析, 得出温度压力水碳 比 (物质的量之比) 3 个参数 气化反应的影响规律结果表明: 随着气化温度的提高, 平衡转化 率增加, 供给气化反应体系的总热量增加, 原料显热大量增加; 而压力的提高使平衡转化率降低, 供给气化反应体系的总热量增加, 说明压力增加 提高煤的转化率不利; 水碳比增大导致平衡转化 率提高, 供给气化反应体系的总热量增加, 其原因是水碳比增大使化学反应热原料显热大量增 加, 虽然转化率随着水碳比增大得以提高, 但热损失增加 : 煤焦; 气化; 水蒸气; 热效应; 热力学 : T 541 : A : 0253- 2336 ( 2010) 04- 0124- 05 Therm odynam ics Analy sis on Gasification R eaction of Coal Cok e and Steam XIE J-idong, XU Zhen-gang, JIANG Ying (Bejiing R esearch Institute of CoalChem istry, Ch ina CoalR esearch Institute, B eij ing 100013, Ch ina) A bstrac t: In order to research the thermodynamics processing of the coal gasification reaction, taking the most mi portant coal coke and steam reaction processing in the gasification reaction as the research object, an analysis on the reaction thermal effect, G ibbs free energy, equilibrium constants and equilibrium conversion ratio was conducted. The influence law of the temperature, pressure andwater carbon parameters to the gasification reaction was obtained. The results showed thatwith the gasification temperature increased and the equilibr-i um conversion rate increased, the totalthermalvalue supplied to the gasification reaction system would be increased and the sensible heat of the law materialwas highly increased. However, the pressure increasedwouldmake the equilibrium conversion rate reduced, the total thermal value supplied to the gasification reaction system would be increased and thus the pressure increasedwould be not favorable to mi - prove the coal conversion rate. Thewater and carbon ratio increasedwould cause the equilibri