Study of Solid Amine CO₂ Sorbents Based on the Modified Fly Ash

Abstract:

In this paper, coal fly ash was modified by the hydrothermal synthesis method based on sodium hydroxide solution, and then was macerated by ethanol amine. Then we obtained the solid amine adsorbents used to absorb CO₂. The modified fly ash was investigated by scanning electron microscope (SEM) and the specific surface area analyzer (BET) for the microstructure and specific surface area. Then, the solid CO₂ adsorbent was analyzed by fourier transform infrared spectrometer (FT-IR) and thermal analyzer (TGA) in CO₂ atmosphere. Results showed that modified fly ash generated many kinds of zeolite material by the SEM and the BET analysis, greatly increasing the specific surface area, improved the adsorption capacity. FT-IR analysis that the surface of solid amine CO₂ adsorbent with amine groups; TGA analysis that compared with the original fly ash, CO₂ adsorbent by this paper made has the capability of adsorption of CO₂.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 174-177
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.174
• Online since: October 2013
• Authors: Ying Lu Ji, Hui Ping Song*, Fang Qin Cheng, Nan Zheng, Xu Ming Wang
• Keywords: Adsorption, Carbon Dioxide, Fly Ash (FA), Modification, Solid State

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DOI: 10.4028/www.scientific.net/amr.518-523.2380