CO2 Chemical Absorption Process Research Articles

Study on corrosion in CO2 chemical absorption process using amine solution

Abstract This work explores the promise of aqueous solutions of blended methyldiethanolamine (MDEA) and piperazine (PZ) as a costeffective absorbent for carbon dioxide (CO 2 ) capture from power plant flue gas streams. The hanging film experiment is used to study the law of the corrosion of blended MDEA/PZ containing different CO 2 loading with carbon steel and stainless steel. Electrochemical corrosion experiments were carried out using the potentiodynamic polarization technique for carbon steel corrosion measurements. Many factors are taken into account, including temperature, CO 2 loading, mixing ratio of blended MDEA/PZ. The results show that the corrosion rate of carbon steel increases with solution temperature, concentration of PZ, CO 2 loading of solution.

Investigating the dynamic response of CO2 chemical absorption process in enhanced- O2 coal power plant with post-combustion CO2 capture

Abstract Studies have been carried out to show that there could be benefits in employing a hybrid of the post combustion capture and oxyfuel processes. The former is suited for retrofit purposes but involves an energy intensive solvent regeneration process. The oxyfuel process would result in high partial pressures of CO 2 in the flue gas making separation easier. However, the Air Separation Unit is also energy intensive and significant modifications would have to be made on the power generation process. An enhanced- O 2 coal power plant with post combustion CO 2 capture would produce flue gas with reduced mass flow and higher CO 2 partial pressures. The dynamic response of the downstream CO 2 capture plant was studied in this paper.