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采用CHEMKIN化学反应动力学软件及计算流体力学软件CFD等数值方法详细探讨了在微尺度内甲烷自热重整反应中温度和压力对出口组分摩尔分数的影响和催化壁面总积碳量的影响.结果表明,当温度超过873 K,会促进水煤气转化反应的发生,导致氢气减少、水和一氧化碳增加,用于燃料电池的微型反应器内甲烷自热重整的温度不宜超过1000K,此时重整合成气中氢气的摩尔分数可达54.05%,一氧化碳的摩尔分数为9.98%;从能效、积炭和燃料电池的原料气的要求分析,用于燃料电池的微型反应器内甲烷自热重整的反应压力应低于1.8105Pa;同时在1000K左右,积炭过程和消炭过程可到达一个平衡阶段,有利于催化剂寿命的延长。
The influences of temperature and pressure on the molar fraction of export components and the total carbon deposition on the catalytic wall were investigated in detail using CHEMKIN chemical reaction kinetics software and computational fluid dynamics software CFD. The results show that when the temperature exceeds 873 K, the conversion of water gas will be promoted, resulting in the decrease of hydrogen and the increase of water and carbon monoxide. The temperature of methane autothermal reforming in the microreactor for fuel cell should not exceed 1000K, The mole fraction of hydrogen integrated into the gas is up to 54.05% and the mole fraction of carbon monoxide is 9.98%. From the energy efficiency, coke and feed gas requirements analysis of the fuel cell, the methane autothermal reforming for the microreactor of the fuel cell Of the reaction pressure should be lower than 1.8105Pa; the same time at about 1000K, carbon deposition process and carbon elimination process can reach a balance stage, is conducive to the extension of the catalyst life.