Behaviour of absorption/stripping columns for the CO₂‐MEA system; Modelling and experiments

Abstract

A model is presented for the steady‐state simulation of a CO2 recovery pilot plant with aqueous monoethanolamine (MEA) solutions. CO2 absorption is performed in a column packed with 2.54 cm ceramic Pall rings. CO2 recovery is achieved in a 20 sieve tray steam stripping column. The packed column absorption model was fitted to the experimental data using the specific interfacial area of the irrigated packing as an adjustable parameter. The equivalent average bubble diameter was used as the adjusting parameter in the sieve tray stripping column. Modelling of both towers reproduces within 3% average error concentrations measured in a pilot plant. Measured temperatures were also well correlated.

Parametric studies of carbon dioxide absorption into highly concentrated monoethanolamine solutions

“…With that in mind, this work investigated the effect of operating variables on the overall mass transfer coefficient in an MEA-based CO, absorption system. Similar studies have been conducted in the past by Escobillana et al (1991), Tontiwachwuthikul et al (1992), de Brito et al (1 994), and Aroonwilas and Tontiwachwuthikul(l998), but the solution concentrations were all under 3.0 kmol/m3. According to Cagliardi et al (1 989), and Mariz (1 999, many MEA plants have been operating with solution concentrations of 3.0 kmol/m3.…”

Dynamic simulation of MEA absorption process for CO2 capture from power plants

“…Escobillana et al (1991), Freguia and Rochelle (2003) and Kvamsdal et al (2009) applied the enhancement factor of pseudo-first order reaction with respect to the concentration of CO 2 in modeling a packed absorption column. Tontiwachwuthikul et al (1992) and Pintola et al (1993) adopted an explicit equation of enhancement factor for irreversible second order reaction developed by Wellek et al (1978) in their absorption column model.…”

Pressure modification index based on hydrodynamics and mass transfer effects for modeling of CO 2 removal from natural gas via absorption at high pressures

“…Moreover it is not specifically designed for CO 2 removal process. Modeling using rate based non equilibrium approach for CO 2 removal has also been carried out by Escobillana et al (1991) and Tan et al (2016). However, in Escobillana et al (1991), the value of effective interfacial area, a e is simply adjusted by 50% to fit their model with experimental data.…”

“…Modeling using rate based non equilibrium approach for CO 2 removal has also been carried out by Escobillana et al (1991) and Tan et al (2016). However, in Escobillana et al (1991), the value of effective interfacial area, a e is simply adjusted by 50% to fit their model with experimental data. On the other hand, the model presented in Tan et al (2016) performs very well for pressure up to 30 bar utilizing the correlation developed by Wang et al (2006).…”

“…Zhang et al (2003) Derived pressure modification index based on hydrodynamics and mass transfer experimentally but pressure range is very small (2-7.6 bar) and limited to MDEA based system Escobillana et al (1991) The value of effective interfacial area is simply reduced by 50% to fit the model with experimental data. Tan et al (2016) Model performs well for P < 30 bar.…”