煤气化过程中含硫化合物生成特性的热力学研究  

The Generation Properties of Sulfur Compounds During Coal Gasification by Thermodynamic Equilibrium Simulation

作　　者：张婷[1] 郭庆华[1] 梁钦锋[1] 于广锁[1] 

机构地区：[1]煤气化教育部重点实验室(华东理工大学),上海市徐汇区200237

出　　处：《中国电机工程学报》2011年第11期32-39,共8页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2010CB227004);国家自然科学基金项目(20876048);国家863高技术基金项目(2008AA05Z310)~~

摘　　要：对于复杂的煤气化反应系统,可借助热力学平衡分析工具对反应过程中主要含硫化合物的生成特性及其主要影响因素进行预测。该文以4种典型煤为研究对象,气化条件选取温度范围373～1 673 K,压力4.0 MPa,利用FactSage对系统进行热力学平衡模拟。结果表明:在还原性气氛下,煤中硫主要转化为气相H2S,其次为COS,以及极微量的CS2,固相含硫化合物的主要为CaS、FeS2、FeS;H2S的生成与煤中含Ca、Fe化合物含量密切相关;Ca/S、Fe/S以及O/C摩尔比的变化都会影响H2S的生成。It is usable to apply thermodynamic equilibrium analysis tools to predict the generation property for a complex coal gasification system. The behaviors of some primary sulfur compounds during the gasification of different coals at temperatures raging from 373 to 1 673 K and 4.0 MPa were analyzed using an equilibrium calculation approach. The results show that, in the reductive atmosphere, the sulfur in coal translates into HES mostly, then the COS, as well as a very small amount of CS2, solid-phase sulfur compounds mainly are CaS, FeS2 and FeS; the generation of H2S is directly bound up with the content of CaO and Fe203 in coal; the changes of Ca/S, Fe/S and O/C molar ratio affect the formation of H2S definitely.

关 键 词：煤气化 含硫化合物 热力学平衡模拟 FactSage 

分 类 号：TQ546[化学工程—煤化学工程]