Design and operation of water-wash sections to minimize MEA emissions

10 Pages Posted: 21 Nov 2022

See all articles by Maxime François

Maxime François

Norwegian University of Science and Technology (NTNU) - Department of Chemical Engineering

Ardi Hartono

Norwegian University of Science and Technology (NTNU) - Department of Chemical Engineering

Hallvard F Svendsen

Norwegian University of Science and Technology (NTNU) - Department of Chemical Engineering

Karl Anders Hoff

SINTEF Industry

Hanna K. Knuutila

Norwegian University of Science and Technology (NTNU) - Department of Chemical Engineering

Date Written: November 20, 2022

Abstract

Whether in gaseous or aerosol form, mitigation of emissions from absorption-based carbon capture remains a real challenge. Among the available control technologies, water-wash is one of the most conventional and has been shown effective regarding gaseous emissions. This work aims to explore different water-wash designs and experimental conditions to observe the influence of such parameters on the aerosol mitigation capacity. For this purpose, liquid-vapour equilibria (VLE) for dilute aqueous solutions of water and monoethanolamine (MEA), loaded with CO2, were measured. An existing thermodynamic model was then validated with these data for low amine concentrations (30, 6, 3 and 0.6wt%) with CO2 loading between 0.1 and 0.4 mol CO2/mol MEA. Several simulations were carried out for coal- and natural gas-based exhaust using a model reproducing the behaviour of aerosols along the absorber and the water-wash section. Different packing heights in absorber and water-wash sections, and the presence or absence of one or more intercooling stages were studied. Although these operational changes showed significant effects on the outlet aerosol and gaseous emissions, none was able to reduce the emissions to acceptable limits.

Keywords: CO2 capture, emissions, water-wash, modelling, aerosols

Suggested Citation

François, Maxime and Hartono, Ardi and Svendsen, Hallvard F and Hoff, Karl Anders and Knuutila, Hanna Katariina, Design and operation of water-wash sections to minimize MEA emissions (November 20, 2022). Proceedings of the 16th Greenhouse Gas Control Technologies Conference (GHGT-16) 23-24 Oct 2022, Available at SSRN: https://ssrn.com/abstract=4282196 or http://dx.doi.org/10.2139/ssrn.4282196

Maxime François

Norwegian University of Science and Technology (NTNU) - Department of Chemical Engineering ( email )

Trondheim, NO-7491
Norway

Ardi Hartono

Norwegian University of Science and Technology (NTNU) - Department of Chemical Engineering ( email )

Sem Sælands Vei 4
Trondheim, 7491
Norway

Hallvard F Svendsen

Norwegian University of Science and Technology (NTNU) - Department of Chemical Engineering

Trondheim, NO-7491
Norway

Karl Anders Hoff

SINTEF Industry ( email )

Post box 4760 Torgarden
Trondheim, NO-7465
Norway

Hanna Katariina Knuutila (Contact Author)

Norwegian University of Science and Technology (NTNU) - Department of Chemical Engineering ( email )

Trondheim, NO-7491
Norway

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