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甲烷化反应工艺流程和反应器模拟

Methanation reaction process and reactor simulations

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【作者】 沈叶婷张海涛房鼎业李涛

【Author】 SHEN Ye-ting;ZHANG Hai-tao;FANG Ding-ye;LI Tao;State Key Laboratory of Chemical Engineering,Engineering Research Center of Large Scale Reactor Engineering and Technology of the Minister of Education,East China University of Science and Technology;Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education,East China University of Science and Technology;

【机构】 华东理工大学大型工业反应器工程教育部工程研究中心化学工程联合国家重点实验室华东理工大学煤气化及能源化工教育部重点实验室

【摘要】 通过分析绝热反应曲线和反应过程CO转化率曲线,设计可行的多级绝热固定床甲烷化工艺流程,得到了一个第一甲烷化反应器循环比为3.0,反应器个数为3的甲烷化反应系统。建立绝热固定床反应器的一维拟均相数学模型,在工业操作条件下,分析了该流程中3个甲烷化反应器内的温度和摩尔分数分布规律。在合成气的进料速度800 kmol/h,进料温度553 K,操作压力为3.0 MPa,氢碳物质的量比约为3.0,循环比为3.0的条件下,模拟结果表明:物料在3个反应器出口的温度分别为879,725,611 K;甲烷干基摩尔分数分别为53.48%,79.24%和95.49%;CO在3个反应器出口的转化率分别为82.18%,99.41%和100%。第3反应器出口CH4干基摩尔分数为95.49%,满足了工业生产要求。

【Abstract】 By analyzing adiabatic reaction equilibrium curve and CO conversion curve,the multiple adiabatic methanation process of three reactors was obtained with the first reactor recycle ratio of 3. 0. A one-dimensional pseudo-homogeneous model of adiabatic fixed-bed reactor was developed to calculate the distribution of temperature and mole fraction under industrial conditions. The reactor simulations were carried out under the condition of feed rate 800 kmol / h,inlet temperature 553 K,operation pressure 3 MPa and H2/( CO + CO2) mole ratio about 3. The results showed that the outlet temperature reached 879 K,725 K and 611 K,the outlet CH4dry-based mole fraction were 53. 48%,79. 24% and 95. 49%,respectively. The CO conversion were 86. 48%,99. 20% and 100%,respectively. The outlet CH4dry-based mole fraction of the third reactor was 95. 49%,which should meet the requirement of industrial production.

  • 【文献出处】 化学工程 ,Chemical Engineering(China) , 编辑部邮箱 ,2016年08期
  • 【分类号】TE665.3
  • 【被引频次】5
  • 【下载频次】400
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