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Experimental investigation of low temperature CO2 liquefaction and phase-separation for carbon capture

Abstract

A low-temperature CO2 liquefaction and phase-separation experimental rig has been built in SINTEF's
Thermal Energy laboratory in Trondheim for investigation of carbon capture and CO2 liquefaction
applications. This paper describes the experimental setup and results from the first experimental runs. The rig
has been operated with two different binary feed compositions; 63 mol% CO2 - 37 mol% N2, and 76 mol%
CO2 - 24 mol% N2. These compositions are representative of a flue gas stream from for example a cement
factory after an initial membrane based bulk separation of the flue gas. The experimental results have been
compared to steady-state equilibrium process simulations. These are found to be in close agreement with each
other for process conditions, liquid CO2 product purity and Carbon Capture Ratio. Liquid CO2 product purity
can be controlled by controlling the separation pressure in the second separator. Reduced separation pressure
leads to increased CO2 product purity. The process is found to be stable and easily controllable.

Category

Academic article

Language

English

Author(s)

Affiliation

  • SINTEF Energy Research / Gassteknologi

Year

2019

Published in

Science et technique du froid

ISSN

0151-1637

Volume

Part F147717

Page(s)

147 - 153

View this publication at Norwegian Research Information Repository