Influence of temperature on DETA loaded silica gel for CO2 capture

https://doi.org/10.1016/j.apenergy.2016.09.081

“The CO₂ adsorption performance of the impregnated materials at different temperatures gives essential information about the best temperature at which the sorbents should be used for CO₂ capture. As the reaction of amines with CO₂ is exothermic [56], [57], an increase in temperature could reduce the capture capacity of the impregnated samples. Fig. 10 shows the CO₂ capture capacity with respect to temperature, in the range from 25 °C to 100 °C. We find the CO₂ capture capacity decreases with increasing temperature for all the studied samples, but there are small differences in the series. For instance, in the case of FS and FS-DETA-10%, the reduction of CO₂ uptake with temperature is faster than that obtained for FS-DETA-20% and FS-DETA-40%. The profile curves of FS-DETA-10% and FS-DETA 40% cross at 78 °C.”

“Fig. 10. Temperature-programmed adsorption of CO₂ of FS-DETA series. Conditions: 100% CO₂ at 60 mL/min flow rate, and 1 bar.”