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Green preparation of CaO-based CO 2 adsorbent by calcium-induced hydrogenation of shell wastes at room/moderate temperature.
- Source :
-
Journal of environmental management [J Environ Manage] 2024 May; Vol. 359, pp. 120782. Date of Electronic Publication: 2024 Apr 25. - Publication Year :
- 2024
-
Abstract
- Capturing CO <subscript>2</subscript> using clamshell/eggshell-derived CaO adsorbent can not only reduce carbon emissions but also alleviate the impact of trash on the environment. However, organic acid was usually used, high-temperature calcination was often performed, and CO <subscript>2</subscript> was inevitably released during preparing CaO adsorbents from shell wastes. In this work, CaO-based CO <subscript>2</subscript> adsorbent was greenly prepared by calcium-induced hydrogenation of clamshell and eggshell wastes in one pot at room/moderate temperature. CO <subscript>2</subscript> adsorption experiments were performed in a thermogravimetric analyzer (TGA). The adsorption performance of the adsorbents obtained from the mechanochemical reaction (BM-C/E-CaO) was superior to that of the adsorbents obtained from the thermochemical reaction (Cal-C/E-CaO). The CO <subscript>2</subscript> adsorption capacity of BM-C-CaO at 650 °C is up to 36.82 wt%, but the adsorption decay rate of the sample after 20 carbonation/calcination cycles is only 30.17%. This study offers an alternative energy-saving method for greenly preparing CaO-based adsorbent from shell wastes.<br />Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2024 Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1095-8630
- Volume :
- 359
- Database :
- MEDLINE
- Journal :
- Journal of environmental management
- Publication Type :
- Academic Journal
- Accession number :
- 38669884
- Full Text :
- https://doi.org/10.1016/j.jenvman.2024.120782