Research on Energy Utilization in Recovery of CO2 from Boiler Flue Gas


To the 2×40 t/h heating boiler flue gas, ethanolamine was used for absorption, carbamate – for desorption. The waste heated boiler flue gas was used to heat the absorption and the desorption; the pump was driven by the solar energy. The results showed that the best absorption rate was 82.28%, when the ethanolamine concentration was 40% and the temperature was 40∘C; the energy consumption was 59.82 KJ/mol. The best desorption temperature was 115∘C, the desorption rate was 55%, and its energy consumption was 694.30 KJ/mol. The pump needed 1.49 KJ/h, reduced 42.8 t/year of CO2 and regenerated 23.54 t/year of CO2.

Keywords: CO2 absorption rate, CO2 desorption rate, CO2 regeneration rate, energy conservation, emission reduction

[1] Feng, L., Liu, N. R., Li, C. R., et al. (2017). Research on CO2 absorption of ethanolamine in laboratory. Chinese Journal of Environmental Engineering, vol. 35, pp. 267–671.

[2] Yeh, J. T. and Pennline, H. W. (2001). Study of CO2 absorption and desorption in a packed column. Energy & Fuels, vol. 15, no. 2, pp. 274–278.

[3] IPCC. (2014). Special report on emissions scenarios: A special report of working group III of the Intergovernmental Panel on Climate Change. New York, NY: Cambridge University Press.

[4] Qin, L. (2014). Theoretical study on solubility and viscosity of MDEA-PZ-CO2 system. Baoding: North China Electric Power University.

[5] Chen, L. and Zha, X. (2018). Computational fluid dynamics simulation of ethanol absorption by ethanolamine in structured packing. Journal of Harbin Institute of Technology.