Phase equillibrium studies of impure CO2 systems to underpin developments of CCS technologies, Jie Ke, University of Nottingham. Presented at CO2 Properties and EoS for Pipeline Engineering, 11th November 2014

1. Phase equilibrium studies of impure
CO2 systems to underpin
developments of CCS technologies
Jie Ke, Martyn Poliakoff and Michael W. George
School of Chemistry
The University of Nottingham
11 November, 2014, CO2 Properties and EOS for Pipeline Engineering, York

2. Acknowledgements
National Grid
E.ON
Rolls-Royce
PSE
Dr. Stéphanie Foltran
Dr. Yolanda Sanchez-Vicente
Dr. Andrew J. Parrot
Dr. James Calladine
Dr. Maria-José Tenorio
Dr. Alisdair Wriglesworth
Matthew E. Vosper
Norhidayah Suleiman
Prof. Trevor Drage
UKCCSRC
Our collaborators from the COZOC, MATTRAN and
COOLTRANS projects
ETI
EPSRC
TSB

3. High-pressure facilities in Nottingham

4. Sensors
t
t=0 t=0
Sound Wave
IR
Holey fibre + GC
Density meter
ATR
Optical fibre Shear-mode quartz
J. Phys. Chem. 1996, 100, 9522. J. Phys. Chem. 1997, 101, 5853. Fluid Phase Equilib.
1998, 150, 493. J. Supercrit. Fluids 2004, 30, 259. Phys . Chem. Chem. Phys. 2004,
6, 1258. J. Chem. Eng. Data 2009, 54, 1580.

5. Vapour-liquid-equilibrium and other
thermodynamic properties of CO2 mixtures
Density
CO2 + N2, CO2 + H2, CO2 + N2 + H2 and CO2 + N2 + Ar
VLE
Without water With water
o CO2 + N2 (4 mixtures)
o CO2 + H2 (3 mixtures)
o CO2 + N2 + H2 (2 mixtures)
o CO2 + N2 + Ar (in progress,
funded by ETI and PSE)
o CO2 + H2 + Ar (in progress,
funded by ETI and PSE)
o CO2 + H2O
o CO2 + N2 + H2O
o CO2 + H2 + H2O

6. p – T phase boundary of CO2 + N2 and CO2 + H2
CO2 + N2 CO2 + H2
9.1%
260 270 280 290 300
14
12
10
8
6
4
2
p / MPa
T / K
14%
260 270 280 290 300
10
8
6
4
2
p / MPa
T / K
Pure CO2
2%
5%
Pure CO2
4% 3%

7. p – T phase boundary of the ternary system of
CO2 + N2 + H2
260 270 280 290 300
12
8
4
0.95 CO
2
+ 0.05H
2
0.95 CO
2
+ 0.05N
2
p / MPa
T / K
0.95 CO
2
+ 0.02 N
2
+ 0.03 H
2
0.93 CO2 + 0.04 N2 + 0.03 H2
Pure CO2

8. Solubility of H2O in CO2 + N2 (40 oC)
yH2O - mole fraction of H2O
Pure CO2
95% CO2 + 5% N2
90% CO2 + 10% N2

9. What is next?
• The VLE data of multicomponent mixtures (more than 5
components) of CO2, N2 and O2, H2, Ar, etc.
• The solubility of water in the mixture of CO2 + N2 + H2.
• CO2 and N2 solubilities in sea water.
• Karl-Fischer titration
• Spectroscopic methods