利用计算流体力学软件CFD和化学反应动力学软件CHEMKIN研究了微通道内催化壁面温度、反应混合气体初始温度对镍基催化剂上CH_4/O_2/H_2O自热重整反应暂态特性的影响。结果表明,微通道内的甲烷自热重整反应暂态特性与温度关系密切。温度越高,反应趋于平衡所需的时间越短;当反应器壁面温度较高时,提高反应混合气入口温度对反应影响不大;在相同的温升下,提高反应器壁面温度比提高反应混合气体初始温度对反应过程中氢气的产生和甲烷的转化更有利。
Influence of catalytic wall temperature and mixture gas inlet temperature on the transient characteristics of CH_4/O_2/H_2O auto-thermal reforming reaction in micro-channel with Ni catalyst were done with numerical simulation,using both CFD and Chemkin software.Results indicate that the transient characteristics of CH_4/O_2/H_2O auto-thermal reforming reaction are closely related to temperature in micro-channel.The temperature is higher;the reaction reaches steady to be quicker.It is not obvious for reaction effect to improve mixture gas inlet temperature when the wall temperature is higher.At the same temperature rise,it is more advantageous for hydrogen production and methane conversion to improve wall temperature than to improve mixture gas temperature at inlet.
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