Solid Solubility in the Aqueous 2-Amino-2-methyl-propanol (AMP) Plus Piperazine (PZ) System

Randi Neerup, Kenny Ståhl, Philip L. Fosbøl*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

In this work, the solid–liquid equilibrium (SLE) of the ternary system 2-amino-2-methyl-propanol (AMP)–piperazine (PZ)–H2O and the aqueous binary system AMP was determined using a freezing point depression setup and differential scanning calorimetry. A total of 59 new data points are listed in the full concentration ranges of 0 < w(AMP) < 100% and 0 < w(PZ) < 61%. The SLE phase boundary of AMP tetrahydrate (AMP·4H2O) was determined and confirmed by its crystal structure obtained by powder X-ray diffraction. The new data of this work can be used in the creation of a thermodynamic model for prevention of AMP and PZ precipitates from solvents used for CO2 capture. This gives a higher degree of safe operation. These data will allow for a deeper understanding of molecular interaction and bond lengths in the AMP–water system, which can be used for molecular simulation.
Original languageEnglish
JournalJournal of Chemical and Engineering Data
Volume64
Issue number6
Pages (from-to)2423-2428
ISSN0021-9568
DOIs
Publication statusPublished - 2019

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