https://doi.org/10.1007/s12034-019-1936-8
“The adsorption experiments were executed using a fixed-bed reactor of dimensions 2.5 cm diameter and 30 cm length. The reactor was fitted with band-heaters, temperature indicators and proportional-integral-derivative controllers to maintain the reactor temperature precisely within ±1∘C±1∘C. A schematic of the experimental setup is shown in figure 1. Approximately 10 g of synthesized sorbent was mixed with 5 g of quartz sand and was filled into the reactor. Sand was added to increase the porosity of the bed. The reactor was heated to a desired temperature before allowing the simulated flue gas (mixture of CO2CO2 and N22 saturated with water vapour) to flow through the reactor. In each adsorption experiment, the inlet concentration (Co)Co) of CO2CO2 and total flow rate were maintained at 15 ± 1 vol% and 50 ± 3 cc per min, respectively. To measure the outlet concentration (Ce)Ce) of CO2CO2, the exit gas stream was passed through a dryer followed by a CO2CO2-IR analyser (SR-2016, Technovation Analytical Instruments Pvt. Ltd., India). After each adsorption cycle, the reactor temperature was increased in the presence of N2N2 flow to regenerate the adsorbent. In the present work, all the adsorption and desorption experiments were performed under atmospheric pressure. For each adsorbent, two cycles of adsorption–desorption experiments were carried out under identical conditions, and the average value of the two runs has been mentioned in this paper.”