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基于镍基催化剂下表面反应机理,采用数值模拟方法,深入研究了在一定水碳比下,CO_2含量的变化以及在固定的CH_4/H_2O/CO_2比例下催化壁面温度,质量流量对微细腔内甲烷重整反应的影响。结果表明提高CO_2/CH_4的比例能够明显提高CO_2、CH_4转化率,提高CO的含量。CH_4/CO_2基元反应的产物在低温条件下CO和H_2O,水蒸气转化率和H_2产量降低,CO_2含量增加降低水蒸气的消耗;在高温条件下,由于产生CO和H_2,使氢气含量增加但水蒸气转化率降低.
Based on the reaction mechanism of the surface of Ni-based catalyst, the numerical simulation method was used to study the change of CO 2 content at a certain water-carbon ratio and the influence of the temperature and mass flow rate of the catalytic wall on the methane concentration in the micro-cavity at a fixed CH 4 / H 2 O / CO 2 ratio The effect of the reforming reaction. The results show that increasing CO 2 / CH 4 ratio can significantly increase CO 2 and CH 4 conversion rate and increase CO content. Under the condition of low temperature, the product of CH_4 / CO_2 reaction reduced the conversion of steam and H_2, the decrease of H_2 and the increase of CO_2, and reduced the consumption of water vapor. Under the condition of high temperature, the content of hydrogen increased due to the production of CO and H_2 Water vapor conversion rate is reduced.