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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。
The effect of the catalytic wall temperature in the microchannel and the initial temperature of the reaction mixture on the transient behavior of CH 4 / O 2 / H 2 O self-thermal reforming reaction on Ni-based catalysts was studied by computational fluid dynamics software CFD and chemical reaction kinetics software CHEMKIN. The results show that the transient characteristics of methane autothermal reforming in the microchannels are closely related to the temperature. The higher the temperature, the shorter the time required for the reaction to balance; when the reactor wall temperature is higher, increasing the reaction mixture inlet temperature has little effect on the reaction; under the same temperature increase, the reactor wall temperature ratio is increased The initial temperature of the reaction mixture is more favorable for the generation of hydrogen and the conversion of methane during the reaction.