Modeling the methyldiethanolamine-piperazine scrubbing system for CO

2016, Volume 10, Issue 1

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Frontiers of Chemical Science and Engineering >> 2016, Volume 10, Issue 1 doi: 10.1007/s11705-016-1555-5

Modeling the methyldiethanolamine-piperazine scrubbing system for CO

Dipartimento di Chimica, Materiali e Ingegneria Chimica “G. Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy

Accepted: 2016-02-01 Available online: 2016-02-29

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Abstract

Aqueous solutions of methyldiethanolamine (MDEA) and piperazine (PZ) are commonly used solvent nowadays. In this work a thermodynamic analysis with the Electrolyte-NRTL model has been performed for systems composed of acidic gases and MDEA+PZ aqueous solution. ASPEN Plus has been used for thermodynamic modeling. Values of binary interaction parameters for liquid phase activity coefficients have been estimated from regressions of experimental data. Moreover, the influence of the interactions between ion pairs and MDEA or PZ molecular species has been analyzed. The final aim is to obtain a reliable tool for design and simulation of absorption and stripping columns, fundamentals also in order to carry out energy saving studies.

Keywords

vapor-liquid equilibrium ; methyldietanolamine ; piperazine ; regression ; Electrolyte-NRTL

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