XNC-98催化剂甲醇合成本征动力学

Intrinsic Kinetics of Methanol Synthesis over Catalyst XNC-98

在等温积分反应器中研究了XNC-98催化剂上甲醇合成反应本征动力学。实验压力为4~8MPa,空速7000~13000h-1,反应温度200~260℃。实验采用粒度为0.154~0.198mm的细颗粒催化剂。选取以各组分逸度表示的CO、CO2加氢合成甲醇的Langmuir-Hinshelwood本征动力学模型。采用正交实验设计,实验测定了25组数据,用全局通用算法结合马夸特算法确定动力学模型参数。残差分析和统计检验表明,动力学模型是适宜的。随温度升高,反应器出口甲醇浓度、CO和CO2转化率先增加后降低,在4~8MPa下,230~245℃为较佳反应温度范围;随着反应压力的提高,反应器出口甲醇浓度、CO和CO2转化率都有显著增加,提高反应压力能够有效提高反应器的生产能力。

Under the pressure range of 4~8 MPa, the space velocity from 7000 h-1 to 13000 h-1 and the synthesis temperature from 200℃ to 260℃, the fine grain XNC-98 catalyst was used to investigate the intrinsic kinetics of methanol synthesis in an isothermal integral reactor. The intrinsic kinetic models of the Langmuir-Hinshelwood type were derived in terms of the reaction rates of CO hydrogenation and CO2 hydrogenation in the form of the reactant fugacity. 25 sets of experimental data were got by orthogonal designi...