https://doi.org/10.1007/s12034-019-1936-8
“To analyse the temperature effect on CO2CO2 adsorption, the analysis was conducted at different temperature values ranging from 25–60∘C60∘C at a fixed concentration of the amine (30 wt%) and the observations are shown in figure 7. It was seen that the CO2CO2 uptake capacity decreased gradually with the increasing bed temperature from 25–50∘C50∘C for the EDA-impregnated adsorbent. No significant change in adsorption capacity was observed for the MEA-loaded adsorbent. For the TETA impregnated adsorbent, an increasing pattern in CO2CO2 uptake capacity was observed with the temperature up to around 50∘C50∘C. However, when the bed temperature was further increased to 60∘C60∘C, a depreciating trend in adsorption capacity was found. For the DETA-impregnated adsorbent, the maximum adsorption capacity was observed at 30∘C30∘C under similar conditions of the study. A decrease in CO2CO2 uptake capacity at higher temperature indicates that the desorption of CO2CO2 is relatively more compared to the adsorption rate. The result also shows that the maxima of CO2CO2 capture capacity shifted towards the higher temperatures with an increase in the number of amine groups for a homologous series (EDA, DETA and TETA contain two, three and four amine groups, respectively).”
