Analytic Setup for Multicomponent High‐Pressure Phase Equilibria via Dual Online Gas Chromatography. Issue 7 (29th April 2015)

• Record Type: Journal Article
• Authors: Fourie, Frederick C. v. N.; Schwarz, Cara E.; Knoetze, Johannes H.; Köhler, Michael
• Is Part Of: Chemical engineering & technology. Volume 38:Issue 7(2015:Jul.)
• Page Start: 1165
• Page End: 1172
• Publication Date: 2015-04-29
• Subjects: Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201400643
• Languages: English
• ISSNs: 0930-7516

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A high‐pressure analytic phase equilibria setup, capable of operation at 150 °C and 30 MPa, was developed. The variable‐volume view cell contains two height‐adjustable samplers enabling simultaneous sampling from two phases. Concurrent analysis of both samples was performed with dual online gas chromatography (GC). The GC comprises two inlets, four columns, two switch valves, and three detectors, arranged in parallel pathways. Quantitative detector calibrations were used. The setup was validated by sampling from a one‐phase ternary of known composition, and comparison with binary and ternary literature data. The setup produces accurate phase composition data for supercritical systems and is well‐suited to handle mixture constituents ranging from volatile gases to mid‐length hydrocarbons.</p> </abstract>