Experimental validation of a rate-based model for CO2 capture using an AMP solution

in Wiley Online Library (wileyonlinelibrary.com).Rate-based calculations for trayed and packed columns offer process engineers a more rigorous and reliable basis for assessing column performance than the traditional equilibrium-stage approach, especially for multicomponent separations. Although the mathematics, thermodynamics, and transport-related physics upon which nonequilibrium separations theory is founded are generally true, it is also true that rate-based simulations today suffer from a serious weakness-they are ultimately tied to underlying equipment performance correlations with questionable predictive capability. In the case of packed columns operated countercurrently, correlations are required for the masstransfer coefficients, k x and k y , for the specific area participating in mass transfer, a m , for the two-phase pressure drop, (Dp/Z) 2/ , and for the flood capacity of the column. In particular, it is generally well known that packing mass-transfer correlations available in the public domain are unreliable when they are applied to chemical systems and column operating conditions outside of those used to develop the correlations in the first place. For that reason, we undertake the development of dependable, dimensionally consistent, correlating expressions for the mass-transfer-related quantities k x , k y , and a m for metal Pall rings, metal IMTP, sheet metal structured packings of the MELLAPAK type, and metal gauze structured packings in the X configuration, using a new data fitting procedure. We demonstrate the superior performance of these correlations for a wide range of chemical systems and column operating conditions, including distillations as well as acid gas capture with amines. Further, we show that these new correlations lead to predictions for the relative interfacial area participating in mass transfer that can be greatly in excess of the geometrical surface area of the packing itself.

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“…Equation 63 can be taken to imply that a form of the Chilton-Colburn analogy holds for turbulent liquid film flow.…”

Section: The Mass-transfer Coefficient Correlation For Vapor Flowmentioning

confidence: 99%

New mass‐transfer correlations for packed towers

2011

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“…In this case, experimental data by Gabrielsen et al (2007) and experiments for ten experimental runs. Here, the maximum deviation between simulation and experiment is below 25%.…”

Section: Amp Systemmentioning

confidence: 99%

“…13 Figure 5: Parity plot of CO 2 -separation efficiencies ; simulations vs. experiments by Gabrielsen et al (2007). Figure 6 shows the gas-phase temperature profiles and the CO 2 concentration profiles together with measured values for three selected runs.…”

Section: Amp Systemmentioning

confidence: 99%

A comparative study of different amine-based solvents for CO2-capture using the rate-based approach

Hüser

Schmitz

Kenig

2017

Chemical Engineering Science

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“…Until recently, several methods have been developed to reduce CO 2 emission [1][2][3]. Among them, one of the most efficient ways of capturing CO 2 from the flue gas outlet stream is to use an absorber and a regenerator scheme by using a solution such as an aqueous amine solution [4][5][6][7][8][9], an aqueous ammonia solution [10], nearly pure methanol solvent [11] or 2-amino-2-methyl-1-propanol (AMP) aqueous solution [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of carbon dioxide capture capabilities between methanol solvent and aqueous monoethanol amine solution

Kim

Cho

2010

Korean J. Chem. Eng.

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Simulations have been performed to compare the performance of CO 2 capture power between 98.5 wt% methanol solvent and 30 wt% MEA aqueous solution. A general purpose chemical process simulator, PRO/II with PROVI-SION release 8.3 was used for the modeling of CO 2 capture process. For the simulation of CO 2 capture process using methanol as a solvent, NRTL liquid activity coefficient model was used for the estimation of the liquid phase non-idealities, Peng-Robinson equation of state model was selected for the prediction of vapor phase non-idealities, and Henry's law option was chosen for the prediction of the solubilities of light gases in methanol and water solvents. Amine special thermodynamic package built-in PRO/II with PROVISION release 8.3 was used for the modeling of CO 2 capture process using MEA aqueous solution. We could conclude that the 30 wt% of MEA aqueous solution showed better performance than the 98.5 wt% methanol solvent in CO 2 capture capability. Through this study, we tried to compare the differences between the two processes from the aspects of capital and operating costs using a commercial process simulator. This will guide the optimal process design in the carbon dioxide capture process.

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Experimental validation of a rate-based model for CO2 capture using an AMP solution

Cited by 90 publications

References 30 publications

New mass‐transfer correlations for packed towers

New mass‐transfer correlations for packed towers

A comparative study of different amine-based solvents for CO2-capture using the rate-based approach

A comparative study of carbon dioxide capture capabilities between methanol solvent and aqueous monoethanol amine solution

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