Arrabie, Cédric

Cézac, Pierre

Jay, S.

Legros-Adrian, J,

Mercadier, Jacques

Reneaume, Jean-Michel

Serin, Jean-Paul

English

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HAL Id: hal-02170043
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EXPERIMENTAL STUDIES OF SOLUBILITY OF
ELEMENTAL SULPHUR IN SUPERCRITICAL
CARBON DIOXIDE BETWEEN 10 AND 40 MPA
S. Jay, Pierre Cézac, Jean-Paul Serin, Jean-Michel Reneaume, Jacques
Mercadier, Cédric Arrabie, J Legros-Adrian
To cite this version:
S. Jay, Pierre Cézac, Jean-Paul Serin, Jean-Michel Reneaume, Jacques Mercadier, et al.. EXPERI-
MENTAL STUDIES OF SOLUBILITY OF ELEMENTAL SULPHUR IN SUPERCRITICAL CAR-
BON DIOXIDE BETWEEN 10 AND 40 MPA. 11th European Meeting on Supercritical Fluids New
perspectives in supercritical fluids : Nanoscience, Materials and Processing (11th EMSF), May 2008,
Barcelone, Spain. ￿hal-02170043￿
EXPERIMENTAL STUDIES OF SOLUBILITY OF ELEMENTAL SULPHUR  
IN SUPERCRITICAL CARBON DIOXIDE BETWEEN 10 AND 40 MPA 
 
S. Jay (1), P. Cézac *(1), J.P. Serin (1), J. M. Reneaume (1), J. Mercadier (1),  
C. Arrabie (2), J.M. Legros-Adrian (2) 
 
(1)High Pressure Processes Group –Dep. Chemical Engineering, Laboratoire de Thermique, Energétique et 
Procédés (LaTEP), Université de Pau, rue Jules Ferry, BP 7511 Pau Cedex, FRANCE. 
(2)Ecole Nationale Supérieure en Génie des Technologies Industrielles (ENSGTI), 
 rue Jules Ferry, BP 7511 Pau Cedex, FRANCE. 
Phone: 33 559407830, pierre.cezac@univ-pau.fr 
 
Elemental Sulphur deposition is a problem troubling the production and the transport of natural gas. 
The most common location for this deposition is immediately downstream of a point of pressure 
reduction. A necessary step to eliminate this deposition is to understand the deposit mechanism. 
Recently Cézac et al.1,2 model solubility of solid sulphur in natural gas and study the mechanisms of 
solid sulphur deposition. The constitutive equations of the model are classically the chemical and 
physical equilibriums, partial mass balances and energy balance. The Peng Robinson equation of state 
coupled with the van der Waals one fluid mixing rules is chosen to describe the phase behaviour. It 
appears that desublimation is the most likely sulphur deposition mechanism. During gas expansion, 
the pressure and the temperature both decrease. Consequently, the gas may become over saturated in 
sulphur. Also it appears that experimental data of solid sulphur solubility, even in binary, are very 
sparse.  In this paper, the solubility data of elemental sulphur in CO2, one the three major components 
of natural gas, were measured between 10 and 40 MPa.  A stainless still stirring equilibrium cell with a 
piston is the key part of the apparatus, where solid sulphur and gas phase contacted and established 
solid – gas equilibrium (Figure 1). Cell has a maximum working space of 500 cm3 and a maximum 
working pressure of 50 MPa. The amount of sulphur is obtained by CPG. 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 1: Apparatus for measurement of solubility of sulphur in gas 
 
Booster 
Pmax = 500 
bar 
N2 
CO2 
Equilibrium 
Cell 
Flash 
P  Patm 
Filters 
Mass 
Flowmeter 
Solvant 
bottle 
ACKNOWLEDGEMENTS 
We wish to thank the Conseil Régional d’Aquitaine for his financial support to this work.  
LaTEP is a member of the PILA network: High research and technological resources in multi-
disciplinary actions (http://web.univ-pau.fr/scf-PILA)  
 
 
[1] Pierre Cézac, Jean-Paul Serin, Jacques Mercadier, Gérard Mouton, Chem.Eng. J., 2007,  133, 1-3, 
283-291. 
[2] Pierre Cézac, Jean-Paul Serin, Jean-Michel Reneaume, Jacques Mercadier, Gérard Mouton,  
accepted in JSF 


EXPERIMENTAL STUDIES OF SOLUBILITY OF ELEMENTAL SULPHUR IN SUPERCRITICAL CARBON DIOXIDE BETWEEN 10 AND 40 MPA

Legros-Adrian, J, M

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EXPERIMENTAL STUDIES OF SOLUBILITY OF ELEMENTAL SULPHUR IN SUPERCRITICAL CARBON DIOXIDE BETWEEN 10 AND 40 MPA

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