Dynamic modelling and optimisation of flexible operation in post-combustion CO2 capture plants - A review
- Authors: Bui, Mai , Gunawan, Indra , Verheyen, Vincent , Feron, Paul , Meuleman, Erik , Adeloju, Samuel
- Date: 2014
- Type: Text , Journal article , Review
- Relation: Computers and Chemical Engineering Vol. 61, no. (2014), p. 245-265
- Full Text: false
- Reviewed:
- Description: The drive for efficiency improvements in post-combustion CO2 capture (PCC) technologies continues to grow, with recent attention being directed towards flexible operation of PCC plants. However, there is a lack of research into the effect of process disturbances when operating flexibly, justifying a need for validated dynamic models of the PCC process. This review critically examines the dynamic PCC process models developed to date and analyses the different approaches used, as well as the model complexity and their limitations. Dynamic process models coupled with economic analysis will play a crucial role in process control and optimisation. Also discussed are key areas that need to be addressed in future dynamic models, including the lack of reliable dynamic experimental data for their validation, development of feasible flexible operation and process control strategies, as well as process optimisation by integrating accurate process models with established economic analysis tools. © 2013 Elsevier Ltd.
Monoethanolamine degradation during Pilot-Scale post-combustion capture of CO₂ from a brown coal-fired power station
- Authors: Reynolds, Alicia , Verheyen, Vincent , Adeloju, Samuel , Chaffee, Alan , Meuleman, Erik
- Date: 2015
- Type: Text , Journal article
- Relation: Energy & Fuels Vol. 29, no. 11 (2015), p. 7441-7455
- Full Text: false
- Reviewed:
- Description: The use of aqueous amines, such as monoethanolamine (MEA, 2-aminoethanol), for post-combustion capture (PCC) of CO2 from fossil-fuel-fired power station flue gases leads to undesirable reactions with oxygen, SO2, and NO2. This study has used a gas chromatography with mass spectrometry detection (GC-MS) method to measure the changes in concentrations of organic compounds in samples of a 30% (w/w) aqueous MEA absorbent obtained from CSIRO's PCC pilot plant operating at AGL's Loy Yang brown coal-fired power station in Latrobe Valley, Victoria, Australia. This aqueous MEA absorbent was previously used for more than 700 h of PCC, and the collected samples represent a further 834 h of PCC operation. These data provide a new perspective on the close, interdependent relationships between corrosion and amine degradation reactions. Other important outcomes include confirmation that (a) organic degradation products identified during laboratory-scale trials were also produced during pilot-scale PCC and (b) N-(2-hydroxyethyl)imidazole (HEI) is a suitable molecular marker for oxidative degradation of MEA. This investigation has also highlighted areas that require further research, including (a) determination of oxidative degradation mechanisms in both the presence and absence of dissolved transition metals, (b) determination of parameters that limit oxidative degradation during pilot-scale PCC, (c) investigation of the antioxidative or oxygen-scavenging properties of partially oxidized amine absorbents during PCC, and (d) measurement of the concentrations of glycine, glycolic acid, and other potential organic acids during PCC. [ABSTRACT FROM AUTHOR]
- Description: The use of aqueous amines, such as monoethanolamine (MEA, 2-aminoethanol), for post-combustion capture (PCC) of