1. Isotherm and Thermodynamic Analysis of Carbon Dioxide on Activated Carbon.
- Author
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Rashidi, Nor Adilla, Yusup, Suzana, and Borhan, Azry
- Subjects
CARBON sequestration ,ISOTHERMAL processes ,THERMODYNAMICS ,ACTIVATED carbon ,COMBUSTION ,LOW temperatures - Abstract
In this study, commercial Norit® SX2 activated carbon has been evaluated as a solid adsorbent for carbon dioxide (CO 2 ) capture at the post-combustion conditions, which are at an ambient pressure and low temperatures (< 120 o C). The CO 2 equilibrium adsorption capacity is assessed through a static volumetric technique. This solid adsorbent is characterized in terms of elemental analysis, nitrogen physisorption, as well as surface morphology. The CO 2 adsorptive property of the commercial Norit® SX2 demonstrates a reduction in the amount of CO 2 adsorbed at an elevated temperature, and accordingly, it indicates that CO 2 adsorption is a physical adsorption process and demonstrates a behavior of an exothermic reaction, which consistent with the thermodynamics analysis. Different isotherm models are applied to mathematically model the CO 2 adsorption, and on basis of the regression coefficient (R 2 ), the Freundlich model provides a perfect fit to the experimental data, owing to closeness of the R 2 to unity. The result obtained in this study can serve as a benchmark while searching for inexpensive and superior activated carbon production in future studies. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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