Enhanced carbon dioxide adsorption by potassium hydroxide modified peat soil as porous adsorbent
| Autor: | J. Nor Ruwaida, N. W. C. Jusoh, Halim Abd Md Ali, M. P. Khairunnisa, S. NurAisyah |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 765:012086 |
| ISSN: | 1755-1315 1755-1307 |
| DOI: | 10.1088/1755-1315/765/1/012086 |
| Popis: | Carbon dioxide (CO 2) capture is a strategy established to mitigate issues related to CO 2 emission through various methods, for instance by adsorption. Soil, a natural resources, depending on its particular type are abundant carbon precursor. However, previous studies have neglected the possibility of soil modification for CO 2 adsorption. In this study, a natural soil, peat soil was used to prepare dried, carbonised, and alkaline-modified soils. Through nitrogen adsorption-desorption analysis, the porosity of the alkaline modified soil has higher BET surface area and total pore volume of 72.08 m 2/g and 0.11 cm 3/g respectively. Furthermore, the functional groups of OH, C=O, and S=O presence in the adsorbents which were determined by FTIR also capable to assist the adsorption of CO 2. Hence, the performance of the soil after alkaline modification increased by 85% compared to the non-modified soil where the adsorbent recorded an adsorption capacity of 11.70 mg/g. Moreover, the isotherms and kinetics fitting suggest that the adsorption of CO 2 onto the adsorbents was governed by physisorption. In conclusion, modified soils showed better performance for CO 2 adsorption. Thus, further investigations such as optimisation of the modification process or amine functionalisation are anticipated in development of soil-based adsorbents. |
| Databáze: | OpenAIRE |
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