甲烷蒸汽重整制氢反应器的模拟与分析

摘要

以工业上顶烧式制氢转化炉为研究对象,建立制氢反应器的一维拟均相数学模型.使用Matlab软件采用四阶龙格-库塔算法求解数学模型,模拟分析了反应管内催化剂床层温度和各组分的浓度分布;研究了甲烷蒸汽重整制氢工艺条件的变化对甲烷转化率和工艺气出口温度的影响规律.结果表明:水碳比、炉膛温度和入口温度的增加及空速的降低均会提高甲烷转化率和工艺气出口温度,而入口压力的变化的影响并不显著.本文所得结论对实际生产中甲烷重整制氢工艺条件的优化有一定参考意义.%Base on the industrial top burning type furnace, a one-dimensional pseudo-homogeneous mathematical model of hydrogen production reactor was established. The model was calculated by the method of Runge-Kutta with Matlab. The concentration of each component and temperature distributionin of the reactor were analyzed. The influence of process conditions of methane steam reforming (MSR) on methane conversion and outlet temperature were studied. The results show that the methane conversion and outlet temperature increase with increasing steam-methane ratio, furnace temperature and inlet temperature, and decreasing space velocity. The effect of inlet pressure was not significant. The results will be helpful for optimization of process conditions of MSR.