多联产系统中合成气一步法制取二甲醚的热力学分析  

Thermodynamic optimization of dimethyl ether synthesis from syngas in polygeneration systems

作　　者：段远源[1] 刘洁[1] 

机构地区：[1]清华大学热能工程系热科学与动力工程教育部重点实验室,北京100084

出　　处：《热科学与技术》2007年第2期106-112,共7页Journal of Thermal Science and Technology

基　　金：高等学校优秀青年教师教学科研奖励计划资助项目

摘　　要：二甲醚具有良好的物理化学性质,市场前景广阔,合成气一步法制取工艺因其成本低而受到普遍关注,而多联产系统联产二甲醚可有效降低初投资。构建了合成气一步法制取二甲醚工艺的化学平衡计算模型,研究了在多联产系统中反应温度、压力和原料气配比对二甲醚平衡产率的影响,得到的优化温度为220-260℃,压力为4-6M Pa,使得二甲醚平衡产率取极大值的H2/CO〈1,对于晋城9#无烟煤产生的合成气,优化H2/CO是0.75-0.8。Dimethyl ether （DME） has a great market potential because of its abundant physical and chemical properties. The one-through process of DME synthesis from syngas is of great importance dhe to its low capital cost. A thermodynamic equilibrium model was developed to simulate the synthesis process. Based on the model, the effects of temperature, pressure and the stock gas on the system performance were studied. The optimized results show that temperature is 220- 260 ℃, pressure is 4 - 6 MPa. The equilibrium yield of DME reaches the maximum when H2/CO 〈 1, especially for the syngas converted from Jincheng No. 9 anthracite, the H2/CO should be 0. 75-0. 8.

关 键 词：二甲醚合成 多联产系统 热力学平衡 温度 压力 氢碳比 

分 类 号：TK123[动力工程及工程热物理—工程热物理]