Freezing Point Depressions of Aqueous MEA, MDEA, and MEA−MDEA Measured with a New Apparatus

Philip Loldrup Fosbøl, Mikkel Gielsager Pedersen, Kaj Thomsen

Research output: Contribution to journalJournal articleResearchpeer-review


Freezing points for aqueous monoethanolamine (MEA), methyl diethanolamine (MDEA), and MEA−MDEA solutions were measured in the concentration range from 0 to 0.4 mass fractions of the alkanolamines. For the aqueous MEA−MDEA system, freezing points for 1:4, 1:2, 1:1, 2:1, and 4:1 molar ratios of MEA/MDEA were determined. The experimental values indicate that the MDEA−water interaction is stronger than the MEA−water interaction. Measurements were carried out by a new modified Beckmann apparatus, which has not previously been described. The apparatus and method proved to have good repeatability and accuracy. A correlation of the freezing points as functions of the solution composition was made. Measurements of aqueous MEA and aqueous MDEA were compared to experiments found in the open literature.
Original languageEnglish
JournalJournal of Chemical and Engineering Data
Issue number4
Pages (from-to)995-1000
Publication statusPublished - 2011

Bibliographical note

This article is part of the John M. Prausnitz Festschrift special issue.

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