TY  - JOUR
EP  - 33979
SN  - 09441344
PB  - Springer Science and Business Media Deutschland GmbH
N1  - cited By 20
SP  - 33967
TI  - Evaluation of kinetics and mechanism properties of CO2 adsorption onto the palm kernel shell activated carbon
AV  - none
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85084147360&doi=10.1007%2fs11356-020-08823-z&partnerID=40&md5=1fe777c320832ad0eaf64a4b7839ebeb
JF  - Environmental Science and Pollution Research
A1  - Rashidi, N.A.
A1  - Bokhari, A.
A1  - Yusup, S.
VL  - 28
Y1  - 2021///
N2  - The volumetric adsorption kinetics of carbon dioxide (CO2) onto the synthesized palm kernel shell activated carbon via single-stage CO2 activation and commercial Norit® activated carbon were carried out at an initial pressure of approximately 1 bar at three different temperatures of 25, 50, and 100 °C. The experimental kinetics data were modelled by using the Lagergrenâ??s pseudo-first-order model and pseudo-second-order model. Comparing these two, the non-linear pseudo-second-order kinetics model presented a better fit towards CO2 adsorption for both adsorbents, owing to its closer coefficient of determination (R2) to unity, irrespective of the adsorption temperature. In addition, kinetics analysis showed that the corresponding kinetics coefficient (rate of adsorption) of both activated carbons increased with respect to adsorption temperature, and thereby, it indicated higher mobility of CO2 adsorbates at an elevated temperature. Nevertheless, CO2 adsorption capacity of both activated carbons reduced at elevated temperatures, which signified exothermic and physical adsorption (physisorption) behaviour. Besides, process exothermicity of both carbonaceous adsorbents can be corroborated through activation energy (Ea) value, which was deduced from the Arrhenius plot. Ea values that were in range of 32â??38 kJ/mol validated exothermic adsorption at low pressure and temperature range of 25â??100 °C. To gain an insight into the CO2 adsorption process, experimental data were fitted to intra-particle diffusion model and Boydâ??s diffusion model, and findings revealed an involvement of both film diffusion and intra-particle diffusion during CO2 adsorption process onto the synthesized activated carbon and commercial activated carbon. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
IS  - 26
KW  - activated carbon; adsorption; carbon dioxide; low pressure; reaction kinetics; shell; temperature effect
KW  -  carbon dioxide; charcoal
KW  -  adsorption; kinetics; temperature
KW  -  Adsorption; Carbon Dioxide; Charcoal; Kinetics; Temperature
ID  - scholars14814
ER  -