Welcome to visit The Chinese Journal of Process Engineering, Today is

›› 2010, Vol. 10 ›› Issue (5): 933-938.

• 过程与工艺 • Previous Articles     Next Articles

Two-dimensional Mathematical Model and Analysis of Tube-shell Type Reactor for Synthesis of Dimethyl Ether from Syngas

WANG Yu MA Hong-fang YING Wei-yong FANG Ding-ye   

  1. Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, East China University of Science and Technology Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, East China University of Science and Technology Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, East China University of Science and Technology Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, East China University of Science and Technology
  • Received:2010-08-10 Revised:2010-10-25 Online:2010-10-20 Published:2010-10-20
  • Contact: YING Wei-yong

合成气制二甲醚管壳型反应器的二维数学模型与分析

王宇 马宏方 应卫勇 房鼎业   

  1. 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 华东理工大学化学工程国家重点实验室 华东理工大学化学工程国家重点实验室
  • 通讯作者: 应卫勇

PDF

Abstract: Two-dimensional mathematical model of tube-shell type one-step dimethyl ether synthesis reactor was established. Profiles of concentration and bed temperature in axial and radial direction were obtained by MOL algorithm. Reactor performance was analyzed by simulation. The results showed that when operated under the standard conditions in the reactor with the tube diameter of 38 mm, the hot point was located 2.1 m away from the entry of reactor tube with the hot point temperature of 262℃, and with a per-pass conversion rate of CO of 64.12%, while selectivity of DME was 89.86%. The maximum radial temperature difference was 4.1℃ and located at the hot point. Hot point temperature increased with the tube diameter. Operation conditions, including temperature of boiling water, flow rate of feed gas and content of CO, had significant influence on per-pass conversion rate of CO, selectivity of DME and hot point temperature.

Key words: syngas, tube-shell reactor, dimethyl ether synthesis, two-dimensional mathematical model

摘要： 建立了合成气一步法制二甲醚管壳式固定床反应器二维拟均相模型，采用有限差分和Runge-Kutta相结合的方法(MOL法)求解催化床层内关键组分浓度与床层温度的轴向与径向分布，模拟分析了反应管直径和操作条件对反应器性能的影响. 结果表明，当反应管内径为38 mm时，标况下床层热点在距反应管入口2.1 m处，热点温度为262.76℃，最大径向温度差为4.1℃，CO单程转化率为64.12%，二甲醚选择性为89.86%. 反应管直径增大导致热点温度升高，沸腾水温度、入塔气量和CO含量都对CO单程转化率、二甲醚选择性和床层热点温度有较大影响.

关键词: 合成气, 管壳型反应器, 二甲醚合成, 二维数学模型

CLC Number: