The Effect ofElectrical Field on C02 Adsorption and Desorption Using Fixed Bed

CO2 removal can be conducted via adsorption process. This project concentrate on the
effect of electrical field on CO2 adsorption and desorption process using fixed bed at
different voltage. The main objective of this project is to study the effect of different
voltages towards the adsorption and desorption process using a bench scale experiment
setup. Literature study on the effect of polarizability of CO2 and activated carbon
towards the adsorption and desorption process was done. Further improvement on the
existing bench scale experiment setup and experimental method has also been made.
The scope of study shall be conducting the bench scale experiment and literature review
on the microscopic view (i.e polarizability) of the electrical enhanced adsorption and
desorption. This includes improvement of the method and setup of the existing lab
apparatus. The experiments conductedfor the adsorption/ desorption processwere using
2.5 mm and 1.5 mm size granular activated carbon (GAC). The experiment was also
done under a 20 kPa CO2 and N2 flow for all the experiment. The results shows that
variation in voltage affects the maximum uptake, rate of adsorption and rate of
desorption of the fixed bed activated carbon.
As voltage increased, the maximum uptake of CO2 gas in activated carbon andthe rate
of adsorption decreased, but the rate of desorption increased. For all three observed
factors, the graph trend of 2.5 mm size GAC shows a higher value than the 1.5 mm
GAC.