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在常压下使用内循环式无梯度反应器研究了Z102镍催化剂上甲烷水蒸汽催化转化反应的动力学。实验条件如下:反应温度500—700℃,H_2O/CH_4=2.5—4.5（克分子比）,甲烷空速为2000—10000ml/h·g-cat。根据实验结果的分析,作者认为在反应过程中一氧化碳和二氧化碳是同时生成的,即甲烷水蒸汽催化转化反应可用平行反应模型来表示。所得到的一氧化碳及二氧化碳的生成速度方程分别为: rco=k,p_(CH_4)~(0.8)及 rco_2=k_2p_(CH_4)~(0.8) p_(H_2O)~(1.5)反应速度常数k_1及k_2与温度的关系均符合阿累尼乌斯方程。一些研究者认为在通常的操作条件下,甲烷水蒸汽催化转化反应过程中,水煤气变换反应很快就达到平衡,我们的实验数据计算证明这个见解是不妥的。
The kinetics of the catalytic reforming of methane steam over Z102 nickel catalyst was investigated at atmospheric pressure using an internal recycle gradientless reactor. The experimental conditions are as follows: reaction temperature 500-700 ° C, H 2 O / CH 4 = 2.5-4.5 (molar ratio), methane space velocity 2000-10000ml / h · g-cat. According to the analysis of the experimental results, the authors believe that carbon monoxide and carbon dioxide are simultaneously generated during the reaction. That is, the catalytic reaction of methane steam reforming can be expressed by a parallel reaction model. The equations for the formation rates of carbon monoxide and carbon dioxide are rco = k, p_ (CH_4) ~ (0.8) and rco_2 = k_2p_ (CH_4) ~ (0.8) p_ (H_2O) ~ (1.5) The relationship with temperature is in line with the Arrhenius equation. Some researchers think that under normal operating conditions, the water gas shift reaction quickly reaches the equilibrium during the catalytic conversion of methane steam, and our experimental data calculation proves that this opinion is not proper.