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Received August 2, 2018
Accepted December 27, 2018
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Synthesis of fly ash-based microporous copper silicate for CO2 capture from humid flue gases
1State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China 2ARC Centre for LNG Futures, the University of Western Australia, Crawley, Australia
dutao0106@gmail.com
Korean Journal of Chemical Engineering, March 2019, 36(3), 450-455(6), 10.1007/s11814-018-0220-8
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Abstract
Conventional microporous adsorbents suffer from CO2 adsorption capacity reduction due to the presence of water vapor in real flue gases. Therefore, development of low-cost moisture-insensitive adsorbents is of great significance. In the present work, microporous copper silicate was synthesized from waste fly ash for the first time. The synthesis conditions were further optimized to obtain copper silicates with high purities. The as-synthesized product was characterized in terms of structural morphology, chemical composition, and surface properties. The CO2 and H2O adsorption properties of the prepared copper silicate were also investigated by single-component isotherm measurements and dynamic CO2/H2O binary breakthrough experiments. The results show that the as-synthesized fly ash-based copper silicate exhibited excellent CO2 adsorption properties even in the presence of water vapor, thus demonstrating promising potential as a moisture-insensitive adsorbent for directly capturing CO2 from humid flue gases.
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