太阳能热化学反应器中甲烷水蒸气重整的参数研究

Study on the parameters of methane steam reforming in solar thermal chemical reactor

文章基于小型太阳能反应器建立了甲烷水蒸气重整的热化学反应数学模型,采用该模型计算得到了甲烷水蒸气重整制氢过程中不同工况参数(孔隙率、气体入口速度、辐照度、反应器压力)对甲烷转化率、氢气产率以及温度分布的影响规律。研究结果表明:沿反应器中心线方向,甲烷的摩尔分数不断降低,氢气的摩尔分数逐渐升高;混合气体最终的摩尔分数及多孔区域最终的温度趋于稳定;甲烷转化率及氢气产率均随着辐照度与孔隙率的增加而增加,随着压力与气体入口速度的增加而降低。

In this paper,a thermochemcial reaction model for steam reforming of methane process was developed based on a lab-scale solar reactor.The effects of different operation parameters,including porosity,gas inlet velocity,solar irradiance,and reactor pressure,on methane conversion,hydrogen produciton,and temperature distribution inside the reactor were obtained.The numerical results showed that along the center line of the reactor,the molar fraction of the methane decreased,while that of the hydrogen product increased gradually.Additionally,the final molar fraction of mixture gas and the temperature inside the porous zone trended to be stable.Both methane conversion and hydrogen yield increased with increasing solar irradiance and porosity,and decreased with increasing reactor pressure and gas inlet velocity.