摘要
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, preexponential 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 highertemperature 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.
出处
《中北大学学报（自然科学版）》
CAS
北大核心
2009年第4期343-348,共6页
Journal of North University of China(Natural Science Edition)
基金
国家重大产业技术开发专项基金资助(发改办高技术[2005]1255)
关键词
高温变换催化剂
节能
程序升温脱附
脱附活化能
吸附活性中心
high temperature shift catalyst
energy-saving
temperature-programmed desorption desorption activation energy
absorption centers
