CNJ甲烷化催化剂反应本征动力学模型

Intrinsic kinetics model of CNJ methanation catalyst

选取280~580℃,1.0~2.5MPa和汽气比0.1~0.7的反应条件,研究了CNJ型合成气甲烷化催化剂的本征动力学。实验所用原料气体积组成为：H256%~58%,CO 6%~7%,CO2≈3%,CH424%~25%,C2H61.5%~2%,其余为N2。利用Matlab对实验数据采用幂函数模型回归得到本征动力学方程。将数据拟合得到的本征动力学方程利用ASPEN PLUS软件进行模拟,并与工业装置结果进行对比验证。结果表明,出口关键组分模拟值与实验值接近,证明模型的合理性。

The intrinsic kinetics of methanation reaction over the CNJ catalyst was studied at the reaction conditions of 280- 580℃, 1.0-2.5MPa and the steam/syngas molar ratio of 0.1-0.7. A raw gas consisting of 56%-58% H2, 6%-7% CO, 3% CO2, 24%- 25% CH4, 1.5%-2% C2H6, and N2 for balance by mole was used for the experiments. Matlab was used to fit the experimental data by the power function model to get the intrinsic dynamic equation. The intrinsic kinetic equation obtained by fitting the data was simulated by ASPEN PLUS, and the results were compared with the data of the industrial plant. The results show that the simulated values of the key components at outlet are close to the experimental values, which proves the rationality of the model.