Preprint Article Version 1 This version is not peer-reviewed

Performance of CO2 Adsorption on Modified Activated Carbons Derived from Okara Powder Waste: Impacts of Ammonia Impregnation

Version 1 : Received: 10 August 2024 / Approved: 13 August 2024 / Online: 13 August 2024 (08:59:19 CEST)

How to cite: Hoang, T.-D.; Le, D. D.; Le, M. T. Performance of CO2 Adsorption on Modified Activated Carbons Derived from Okara Powder Waste: Impacts of Ammonia Impregnation. Preprints 2024, 2024080894. https://doi.org/10.20944/preprints202408.0894.v1 Hoang, T.-D.; Le, D. D.; Le, M. T. Performance of CO2 Adsorption on Modified Activated Carbons Derived from Okara Powder Waste: Impacts of Ammonia Impregnation. Preprints 2024, 2024080894. https://doi.org/10.20944/preprints202408.0894.v1

Abstract

The activated carbons (ACs) derived from okara powder waste with high surface areas were modified with ammonia aqueous solution impregnation in an autoclave to enhance their CO2 adsorption properties toward CO2. The impregnated ACs were characterized in which surface chemical composition and properties of the ACs were analyzed by SEM-EDS, FTIR. Activated carbons were functionalized with ammonia aqueous solution (25%) through a hydrothermal process within 24; 48, and 72 hours. The adsorption performance of CO2 onto carbon samples was experimentally evaluated through a breakthrough adsorption experimental setup at room temperature. FTIR spectra confirm the N-containing in N-modified activated carbons and the presence of the –C = O stretch and N-H groups. CO2 uptakes of N-modified activated carbons are 0.24; 1.47; and 1.20 mmol/g, which are relatively comparable with those of activated carbons studied in in the literature.

Keywords

activated carbon; adsorption; biomaterials; functional groups; surface areas; hydrothermal process; chemical composition; biomass

Subject

Chemistry and Materials Science, Chemical Engineering

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