石油与天然气化工Issue(5)：1-6,6.DOI:10.3969/j.issn.1007-3426.2015.05.001
氨基改性吸附剂在低 CO2分压下吸附 CO2的热力学研究
Thermodynamic study on amine-modified adsorbent of CO2 adsorption at low CO2 partial pressures
摘要
Abstract
To reduce the greenhouse effect ,effective measures should be taken to reduce the emis‐sions of CO2 .Amine‐modified adsorbents are considered as important adsorbent materials to capture CO2 .In this paper ,a balance model was established to describe the adsorption isotherms of amine modified MCM‐41 under low CO2 partial pressure and the thermodynamic parameters was calculated . The model was based on Dual‐site Langmuir model and assumed that there were two independent ad‐sorption mechanisms :chemical adsorption on amine groups and physical adsorption via surface area . In order to distinguish the physical adsorption and chemical adsorption of amine modified adsorbents , a new method based on adsorption of non‐modified adsorbents and surface area was proposed .The re‐sults showed that the model could fit well with the measured adsorption isotherms .The calculated physical and chemical adsorption heats are -25 .4 kJ/mol and -41 .9 kJ/mol respectively ,the total adsorption heats is -67 .3 kJ/mol ,which were in accordance with the experimental data .The satura‐tion adsorption capacity of MCM‐41‐TEPA could reach 7 .79 mmol/g .关键词
氨基改性/MCM-41/低CO2/分压/吸附CO2/热力学Key words
amine-modified/MCM-41/low CO2 partial pressure/CO2 adsorption/thermodynamic分类
能源科技引用本文复制引用
刘之琳,滕阳,张锴..氨基改性吸附剂在低 CO2分压下吸附 CO2的热力学研究[J].石油与天然气化工,2015,(5):1-6,6.基金项目
国家自然科学基金资助项目“流化床内B类颗粒介尺度流动特征及其对煤气化过程影响”（91434120）；中央高校基本研究基金“传质强化的脱硫除尘一体化装置的开发和优化”（2014ZD06）；“111”计划“煤的清洁转化与高效利用创新引智基地”（B12034）。 （）
