文献类型：期刊文献

中文题名：合成气甲烷化反应器模拟和工艺条件优化

英文题名：Simulation and operation conditions optimization of reactor for syngas methanation

作者：王兆东[1];李涛[1]

机构：[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,上海200237

年份：2015

卷号：40

期号：4

起止页码：57

中文期刊名：天然气化工—C1化学与化工

外文期刊名：Natural Gas Chemical Industry

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

语种：中文

中文关键词：合成气;甲烷化;反应器模拟;绝热固定床

外文关键词：syngas; methanation; reactor simulation; adiabatic fixed-bed

摘要：通过分析和简化合成气制天然气甲烷化工艺流程,建立了第一甲烷化绝热固定床反应器的一维数学模型,采用Runge-Kutta法求解数学模型。对合成气甲烷化反应动力学模型中的甲烷化反应平衡常数进行了计算分析和调整,用Matlab计算了第一甲烷化反应器中浓度和温度分布。考察了反应器各个操作参数对床层的影响,综合各种参数影响因素,反应器较优的操作条件如下:合成气的进料速度800kmol/h,进料温度553K,操作压力为3MPa,氢碳比在3左右,循环比为3。在此条件下,第一甲烷化反应器的出口温度在873 K左右,CO的转化率为82.18%,出口气体中CH4的干基的物质的量分数达到57.07%,满足工业生产要求,为工业化反应器设计提供了理论依据。
By analyzing and simplifying the syngas methanation process, a one-dimensional mathematical model of adiabatic fixed-bed reactor was built, and calculated by the method of Runge-Kutta. The equilibrium constant of the methanation reaction was modified based on the analysis and calculation of the syngas methanation kinetics. The distribution of temperature and concentration in the first industrial methanation reactor was calculated with Matlab. The effects of operating conditions on the reactor bed was explored, and the optimum operating parameters were determined as follows： syngas feed speed of 800 kmol/h, inlet temperature of 553K, operation pressure of 3 MPa, Hd（CO＋CO~） mole ratio of about 3, and recycle ratio of 3. Under these conditions, the outlet temperature of first methanation reactor was approximately 873K, the conversion of CO was 82.18%, and the dry-based mole fraction of CI-t4 in the exit gas was 57.07%, which could meet industrial production demands. These results obtained would provide a theoretical basis for industrial methanation reactors design.