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1. 郑州大学化工学院
2. 河南省化学催化重点实验室
Published:2009
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魏灵朝, 王福安, 刘怡. TPD Study of LB Energy-Saving High Temperature Shift Catalyst[J]. 2009, 30(4): 343-348.
针对LB型节能高温变换催化剂工程应用、过程优化、表面性能研究之必需
运用程序升温脱附(Temperature-Programmed Desorption
TPD)技术
实验测得CO
H2O
CO2在催化剂上的TPD曲线.运用Origin7.5的PFM多峰分析和拟合模块
对各TPD曲线进行分离模拟;借助MATLAB操作平台自编程序进行脱附动力学回归
得到脱附活化能、频率因子、脱附级数等脱附动力学参数.表明LB型节能高温变换催化剂具有较好的低汽气比操作性能
对CO不存在多个不同吸附活性中心
对H2O存在多种吸附活性中心
对CO2存在低温区和高温区两类吸附活性中心.CO
H2O
CO2在LB催化剂上的脱附呈现一级脱附动力学特征.探讨了LB型节能高温变换催化剂表面吸附活性中心类型和对CO
H2O
CO2的TPD行为.
The temperature-programmed desorption(TPD) curves of different gases(CO
H2O
CO2) were measured experimentally for the necessary of engineering application
process optimizing and the study on surface properties of LB energy-saving high temperature shift catalyst.All the curves were decomposed and simulated with the peak fitting module in Origin7.5.Desorption activation energy
pre-exponential factors and reaction orders were calculated by using MATLAB operation platform.The results show that LB catalyst expresses good operating performance at low steam-gas ratio
there are multi-adsorption centers for H2O while not for CO
and there are lower-temperature and higher-temperature absorption centers for CO2 on LB catalyst.Desorption of CO
H2O and CO2 on LB catalyst behaved as one-order reaction.The kinds of absorption centers of LB catalyst and their effect on different gases were discussed.
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