Effect of Desorption Temperature on Energy Performance Efficiency

“The desorption temperature is an important factor of solvent properties and operating conditions. Figure 10 and Figure 11 show the result of the energy performance with different desorption temperatures. Attention should be given to the desorption temperature as the final stage temperature in the equilibrium model. The Qsens and Qabs have a slight increase, while the Qvap decreases due to the PCO2 growth. Then, the regeneration heat of the thermodynamic method and equilibrium model both have a growth trend and the equilibrium model is more obvious from 3.75 to 4.32 GJ/t, while the thermodynamic cycle is from 2.82 to 2.85 GJ/t in the ideal condition. The COPCO2 and η2nd both have a decreasing trend, but it is not obvious, from 2.48% to 2.43% and from 26.1% to 24.4%, respectively. Compared to the effect of the thermodynamic properties of MEA solvents, such as thermal degradation, the temperature change of desorption has little influence on the energy performance in ideal conditions, but in actual sense, the heat loss of every part will be greater.”
Figure 10. The regeneration heat changes with the desorption temperature variation.
Figure 11. The energy efficiency performance with the desorption temperature variation.

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