The upper limit of moisture content for supercritical CO2 pipeline transport

A systematic method was established to determine the upper limit of moisture content for supercritical CO2 pipeline transport. In the corrosion experiments, the weight-loss method was applied to measure the corrosion rate of X70 steel exposed to a supercritical CO2/SO2/O2/H2O mixtures for different relative humidity, aiming to explore the critical relative humidity point for X70 steel corrosion under such conditions, which is a crucial point for setting the upper limit of moisture content. The critical relative humidity was estimated to be between 50% and 60% on the basis of the experiment results. The microstructure and chemical composition of the corrosion products were examined employing SEM and XRD. Based on the estimated critical relative humidity combining with the solubility consideration of H2O in CO2 at various temperatures and pressures, the pipeline thermodynamic model was used to determine the upper limit of moisture content for supercritical CO2 pipeline transport.

[1]  Chao Xu,et al.  Impact of SO2 concentration on the corrosion rate of X70 steel and iron in water-saturated supercritical CO2 mixed with SO2 , 2011 .

[2]  Peter Harriott,et al.  Unit Operations of Chemical Engineering , 2004 .

[3]  Riki Kobayashi,et al.  Water Content of CO2 in Equilibrium With Liquid Water and/or Hydrates , 1987 .

[4]  J. C. Mullins,et al.  Ternary phase equilibria for acetic acid-water mixtures with supercritical carbon dioxide , 1987 .

[5]  G. Sieder,et al.  High-pressure (vapor+liquid) equilibrium in binary mixtures of (carbon dioxide+water or acetic acid) at temperatures from 313 to 353 K , 2000 .

[6]  Zaoxiao Zhang,et al.  Optimization of pipeline transport for CO2 sequestration , 2006 .

[7]  T. R. Bott,et al.  The mutual solubilities of water with supercritical and liquid carbon dioxides , 1992 .

[8]  Toby Aiken,et al.  Effects of impurities on CO2 transport, injection and storage , 2011 .

[9]  N. Sylvester,et al.  Explicit approximations to the solution of Colebrook's friction factor equation , 1982 .

[10]  Martin J. Blunt,et al.  Design of carbon dioxide storage in aquifers , 2009 .

[11]  Srdjan Nesic,et al.  A mechanistic model for carbon dioxide corrosion of mild steel in the presence of protective iron carbonate films - Part 3: Film growth model , 2003 .

[12]  W. Ni,et al.  Corrosion Behavior of X70 Steel in the Supercritical CO2 mixed with SO2 and Saturated Water , 2011 .

[13]  Arne Dugstad,et al.  Corrosion of transport pipelines for CO2–Effect of water ingress , 2011 .

[14]  Cheol Huh,et al.  Effect of water and nitrogen impurities on CO2 pipeline transport for geological storage , 2011 .

[15]  M. Mølnvik,et al.  Dynamis CO2 quality recommendations , 2008 .

[16]  Mona J. Mølnvik,et al.  Thermodynamic Models for Calculating Mutual Solubilities in H2O–CO2–CH4 Mixtures , 2006 .

[17]  Edward S. Rubin,et al.  An engineering-economic model of pipeline transport of CO2 with application to carbon capture and storage , 2008 .

[18]  Svend Tollak Munkejord,et al.  Thermo- and fluid-dynamical modelling of two-phase multi-component carbon dioxide mixtures , 2010 .

[19]  Joel Sminchak,et al.  Considerations for treating impurities in oxy-combustion flue gas prior to sequestration , 2009 .

[20]  W. H. J. Vernon,et al.  A laboratory study of the atmospheric corrosion of metals. Part II.—Iron: the primary oxide film. Part III.—The secondary product or rust (influence of sulphur dioxide, carbon dioxide, and suspended particles on the rusting of iron) , 1935 .

[21]  Shi Su,et al.  CO2 capture by electrothermal swing adsorption with activated carbon fibre materials , 2011 .

[22]  B. Sass,et al.  Reactive transport modeling of CO2 and SO2 injection into deep saline formations and their effect on the hydraulic properties of host rocks , 2009 .

[23]  J. Carroll.  Problem is the result of industry's move to use higher pressures , 2003 .

[24]  W. Vernon.  A laboratory study of the atmospheric corrosion of metals. Part I.—The Corrosion of copper in certain synthetic atmospheres, with particular reference to the influence of sulphur dioxide in air of various relative humidities , 1931 .

[25]  Luuk Buit,et al.  CO2 EuroPipe study of the occurrence of free water in dense phase CO2 transport , 2011 .

[26]  A. D. King,et al.  Solubility of water in compressed carbon dioxide, nitrous oxide, and ethane. Evidence for hydration of carbon dioxide and nitrous oxide in the gas phase , 1971 .

[27]  R. Wiebe,et al.  Vapor Phase Composition of Carbon Dioxide-Water Mixtures at Various Temperatures and at Pressures to 700 Atmospheres , 1941 .

[28]  Li Zheng,et al.  Economic evaluation of CO2 pipeline transport in China , 2012 .

[29]  Hailong Li,et al.  CO2 transport–Depressurization, heat transfer and impurities , 2011 .