Optimization of the Post-Combustion CO2 Capture Process Applied to Cement Plant Flue Gases: Parametric Study with Different Solvents and Configurations Combined with Intercooling

3 Pages Posted: 4 Apr 2019 Last revised: 27 Oct 2020

See all articles by Lionel Dubois

Lionel Dubois

Université de Mons-Hainaut

Diane Thomas

Université de Mons-Hainaut

Abstract

The present study is related to Aspen HysysTM simulations of the post-combustion CO2 capture process by absorption-regeneration. More precisely, the purpose of the works is to quantify the interest in terms of solvent regeneration energy of combining alternative process configurations (“Lean/Rich Vapor Compression” (L/RVC)) with an intercooled absorber (ICA). Water-wash sections were also added in the flow sheet for a more accurate simulation of the global process. The Norcem Brevik cement plant flue gas was taken as case study and three different solvents were considered, namely: monoethanolamine (MEA), piperazine (PZ) and piperazine-methyldiethanolamine (MDEA) blend. For each configuration and solvent, parametric studies were carried out in order to identify the operating conditions ((L/G)vol., intercooling temperature, stages and flow rate) minimizing the solvent regeneration energy. Total equivalent thermodynamic work and utilities costs were also analyzed. It could be highlighted that implementing ICA leads to supplementary energy savings. More precisely, the MDEA+PZ blend with RVC+ICA configuration leads to a regeneration energy of 2.19 GJ/tCO2 (35% energy savings in comparison with MEA 30% conventional configuration), the utilities costs being also lower (24.5% savings) in comparison with the same reference case. As perspectives, an other blend will be investigated (namely DEA + PZ) with the same configurations (LVC or RVC + ICA).

Keywords: PCC: Amine process modelling, GHGT-14

Suggested Citation

Dubois, Lionel and Thomas, Diane, Optimization of the Post-Combustion CO2 Capture Process Applied to Cement Plant Flue Gases: Parametric Study with Different Solvents and Configurations Combined with Intercooling. 14th Greenhouse Gas Control Technologies Conference Melbourne 21-26 October 2018 (GHGT-14) , Available at SSRN: https://ssrn.com/abstract=3365618 or http://dx.doi.org/10.2139/ssrn.3365618

Lionel Dubois (Contact Author)

Université de Mons-Hainaut ( email )

20, place du Parc
Mons, B7000
Belgium

Diane Thomas

Université de Mons-Hainaut ( email )

20, place du Parc
Mons, B7000
Belgium

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