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CO2 Absorption Using potassium carbonate as solvent
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1  Centre for Research & Technology Hellas, Chemical Process and Energy Resources Institute,57001 Thessaloniki, Greece
Academic Editor: Nunzio Cennamo


One of the main sources of global warming is greenhouse gasses, most importantly carbon dioxide. Reducing CO2 emissions, as well as its utilization or storage, is a global challenge to tackle climate change. In this work, the operating conditions of the pilot CO2 capture unit are studied using the ASPEN PLUS® software. This study describes the methodology of the simulations and main results. The unit consists of one scrubber and one stripper. For carbon dioxide absorption from gas streams, aqueous solvents K2CO3 is used. The effect on absorption of CO2 and regeneration of carbon dioxide and potassium carbonate were studied by varying parameters of pressure, temperature and concentration of solvent. For each parameter, three values were evaluated with the following ranges: pressure 0.3-1bar; temperature 80-100 oC; concentration of potassium carbonate 15-25wt%. The optimum operating conditions of the pilot unit are pressure 0.3bar; stripper temperature 100oC and solvent concentration 15wt%. Under these conditions, 99.91% CO2 capture and 85.46% CO2 regeneration were achieved. The present research aims to find the optimal operating parameters of the pilot plant, to validate the model with the experimental data. In this way, the model parameterization can be used for the design of large-scale CO2 capture units.

Keywords: CO2 capture; Absorption; Potassium Carbonate;