Conference article

Comparison of simulation tools to fit and predict performance data of CO<sub>2</sub> absorption into monoethanol amine at CO<sub>2</sub> Technology Centre Mongstad (TCM)

Lars Erik Øi
Department of and Process, Energy and Environmental Technology, University College of Southeast Norway, Norway

Kai Arne Sætre
Department of and Process, Energy and Environmental Technology, University College of Southeast Norway, Norway

Espen Steinseth Hamborg
CO2 Technology Centre Mongstad DA, Norway

Download articlehttp://dx.doi.org/10.3384/ecp18153230

Published in: Proceedings of The 59th Conference on Simulation and Modelling (SIMS 59), 26-28 September 2018, Oslo Metropolitan University, Norway

Linköping Electronic Conference Proceedings 153:32, p. 230-235

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Published: 2018-11-19

ISBN: 978-91-7685-494-5

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

In this work, several sets of experimental data from the amine based CO2 capture process at CO2 Technology Centre Mongstad (TCM) have been compared with simulations of different equilibrium based models and a rate-based model. The equilibrium models (in Aspen Plus and Aspen HYSYS) were fitted by adjusting the Murphree efficiency for each stage and the rate-based model (in Aspen Plus) was fitted by adjusting the interfacial area factor. Aspen Plus (using the Electrolyte-NRTL model) and Aspen HYSYS (using Kent-Eisenberg and Li-Mather models) gave almost identical results for the capture rate and small deviations for the temperature profiles. There are however deviations both between the measured temperatures at a specified column height and between measured temperatures and the simulated temperatures. Equilibrium based models are less fundamental than rate-based models, but for the conditions in this study, the rate-based models still lack accurate input parameters like the interfacial area. The results from this study show that equilibrium and rate-based models perform equally well in both fitting performance data and in predicting performance at changed conditions.

Keywords

CO2, amine, absorption, simulation

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