文献类型：期刊文献

英文题名：CO2 adsorption on porous materials: Experimental and simulation study

作者：Hu, Jun[1]; Liu, Honglai[1]

机构：[1] State Key Laboratory of Chemical Engineering, Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China

年份：2010

卷号：1056

起止页码：209

外文期刊名：ACS Symposium Series

收录：EI(收录号：20143318054376)

语种：英文

外文关键词：Dispersions - Magnesia - Mesoporous materials - Organometallics - Gas adsorption - Gas emissions - Crystalline materials - Flue gases - Surface treatment - Ion exchange

摘要：Removal and sequestration of CO2 from flue gas has been proposed as one of the most reliable solutions to mitigate globe greenhouse emissions. Adsorption technology based on porous adsorbent is known to be one of the most efficient processes for the CO2 capture from flue gas. The key issue of this technology is to find the adsorbent with high adsorption capacity and selectivity for CO2 . In this chapter, both the experimental and the computer simulation works about the CO2 adsorption behavior on porous materials in our laboratory were introduced. In the experimental works, the mesoporous materials such as MCM-41 and SBA-15 were selected as the fundamental adsorbent. After surface modification by aminosilane, the amine groups became active centers and the CO2 adsorption capacity was obviously increased due to the chemisorption. It is shown that the dual amine groups of AEAPMDS had better effect on CO2 adsorption than the single amine group of APTS. The best CO2 adsorption capacity of MCM-41-AEAPMDS was 2.20 mmol?g-1 at room temperature. Another effective way was incorporation metal Mg into the mesoporous materials. By various impregnating or doping methods, such as the co-condensation, the dispersion with the enhancement of Al3+ or amine, and the ionic exchange, a suitable amount of Mg2+ can be successfully introduced into MCM-41 and SBA-15, which effectively increased the CO2 adsorption capacity. Different pore structures had their corresponding optimized methods, the real reason behind was the highly dispersed MgO state in the channels. The best CO2 adsorption capacities of Mg-Al-SBA-15-D1 and Mg-EDA-MCM-41-D10 were about 1.35 mmol?g-1. In the simulation works, some novel porous materials such as the micro/mesoporous composite, the covalent organic frameworks, the metal organic framework and the zeolitic imidazolate frameworks were selected as the potential adsorbents for the CO2 capture. The CO2 adsorption behavior of the zeoilte of MFI, the mesoporous MCM-41 and the micro/mesoporous composite of MFI/MCM-41 were simulated and compared. It is revealed that the micro/mesoporous composite had better performances on the CO2 adsorption capacity and selectivity at high pressure, as well as the diffusion performance. ? 2010 American Chemical Society.