Carbon dioxide sequestration effects on coal's hydro‐mechanical properties: a review

SUMMARY Carbon dioxide (CO2) sequestration in deep un-minable coal seam causes the seam's permeability and strength to be significantly reduced because of CO2 adsorption-induced matrix swelling. This paper reviews this swelling process in coal and its influence on coal's flow and strength properties. The amount of swelling depends on the properties of both the gas and the coal mass. The swelling caused by CO2 adsorption is higher compared with that caused by CH4 and N2 and greatly depends on the state of the CO2 phase. The super-critical state of CO2 adsorption causes greater swelling compared with the sub-critical state. It has been observed that the swelling rate increases with increasing CO2 pressure; however, high saturation pressures may cause the coal matrix to shrink. The swelling rate reduces with increasing temperature, and the effect of coal rank on swelling still remains unclear. The CO2 adsorption-induced swelling effect causes the coal mass permeability to be significantly reduced, and the reduction is significant for super-critical CO2.The effect of swelling on coal permeability reduces with increasing temperature. The coal matrix swelling and associated polymer structure re-arrangement occur in the coal mass during and after the CO2 injection, resulting in the weakening of the coal mass strength. The strength reduction is much higher for high rank coal compared with low rank coal. It is also observed that the influence of super-critical CO2 on strength is more powerful than that of sub-critical CO2. Although CO2 sequestration in deep coal seams has been carried out in several main coal seams in the USA, Australia and some other countries, none of these projects has achieved the original target of storing large amounts of CO2, possibly because initial analysis did take into account the effects of coal seam property changes because of the adsorption of CO2 during and after injection. Copyright © 2012 John Wiley & Sons, Ltd.

[1]  C. M. Oldenburg,et al.  Sequestration of CO2 in the Altmark natural gas field, Germany: Mobility control to extend enhanced gas recovery , 2006 .

[2]  Marco Mazzotti,et al.  Adsorption of pure carbon dioxide and methane on dry coal from the sulcis coal province (SW Sardinia, Italy) , 2006 .

[3]  Pathegama Gamage Ranjith,et al.  Effects of effective stress changes on permeability of latrobe valley brown coal , 2011 .

[4]  D. Schrag.  Preparing to Capture Carbon , 2007, Science.

[5]  William D. Gunter,et al.  CO2 storage and enhanced methane production: Field testing at Fenn-Big Valley, Alberta, Canada, with application , 2005 .

[6]  P. Ranjith,et al.  The effects of sub-critical and super-critical carbon dioxide adsorption-induced coal matrix swellin , 2011 .

[7]  H. O. Balan,et al.  Assessment of shrinkage-swelling influences in coal seams using rank-dependent physical coal properties , 2009 .

[8]  H. Bruining,et al.  Swelling and sorption experiments on methane, nitrogen and carbon dioxide on dry Selar Cornish coal , 2010 .

[9]  Stuart Day,et al.  Swelling of Coals by Supercritical Gases and Its Relationship to Sorption , 2010 .

[10]  P. J. Reucroft,et al.  Effect of pressure on carbon dioxide induced coal swelling , 1987 .

[11]  J. S. Liu,et al.  Impact of thermal processes on CO2 injectivity into a coal seam , 2010 .

[12]  S. Durucan,et al.  Improving the CO2 well injectivity and enhanced coalbed methane production performance in coal seams , 2009 .

[13]  John W. Larsen,et al.  The effects of dissolved CO2 on coal structure and properties , 2004 .

[14]  Sujit Karmakar,et al.  Thermodynamic analysis of high‐ash coal‐fired power plant with carbon dioxide capture , 2013 .

[15]  S. Durucan,et al.  CO2 Storage in Deep Unminable Coal Seams , 2005 .

[16]  J. T. McMullan,et al.  Sustainable energy development and greenhouse gas emissions in an island power system , 2000 .

[17]  X. Miao,et al.  Evaluation of stress-controlled coal swelling processes , 2010 .

[19]  R. Marc Bustin,et al.  Adsorption-induced coal swelling and stress: Implications for methane production and acid gas sequestration into coal seams , 2007 .

[20]  Tom R. Bratton,et al.  Field Test of CO2 Injection and Storage in Lignite Coal Seam in North Dakota , 2009 .

[21]  C. Özgen Karacan,et al.  Swelling-Induced Volumetric Strains Internal to a Stressed Coal Associated with CO2 Sorption , 2007 .

[22]  Guoliang Chen,et al.  Estimation of changes in fracture porosity of coal with gas emission , 1995 .

[23]  Shinji Yamaguchi,et al.  CO2-ECBM field tests in the Ishikari Coal Basin of Japan , 2010 .

[24]  Philip L. Walker,et al.  A direct measurement of expansion in coals and macerais induced by carbon dioxide and methanol , 1988 .

[25]  D. Viete,et al.  The mechanical behaviour of coal with respect to CO2 sequestration in deep coal seams , 2007 .

[26]  Andrzej Czapliński,et al.  Changes in mechanical properties of coal due to sorption of carbon dioxide vapour , 1982 .

[27]  Umberto Desideri,et al.  Feasibility study for a carbon capture and storage project in northern Italy , 2008 .

[28]  Yildiray Cinar,et al.  CO2 Storage in Abandoned Coal Mines , 2011 .

[29]  K. Barron,et al.  The effect of gas sorption on the strength of coal , 1988 .

[30]  E. Hihara,et al.  Study on carbon dioxide gas cooler heat transfer process under supercritical pressures , 2002 .

[31]  Stuart Day,et al.  Supercritical gas sorption on moist coals , 2008 .

[32]  Suresh K. Bhatia,et al.  High-Pressure Adsorption of Methane and Carbon Dioxide on Coal , 2006 .

[33]  P. Ranjith,et al.  Effects of saturation medium and pressure on strength parameters of Latrobe Valley brown coal: Carbon dioxide, water and nitrogen saturations , 2011 .

[34]  R. C. Borah,et al.  A review on devolatilization of coal in fluidized bed , 2011 .

[35]  M. A. Barakat,et al.  The change in effective stress associated with shrinkage from gas desorption in coal , 2001 .

[36]  Jan Larsen,et al.  Structural rearrangement of strained coals , 1997 .

[37]  David Airey,et al.  Sub- and super-critical carbon dioxide flow behavior in naturally fractured black coal: An experimental study , 2011 .

[38]  N. I. Aziz,et al.  The effect of sorbed gas on the strength of coal – an experimental study , 1999 .

[39]  P. Ranjith,et al.  A review of coal properties pertinent to carbon dioxide sequestration in coal seams: with special reference to Victorian brown coals , 2011 .

[40]  C. Özgen Karacan,et al.  Heterogeneous Sorption and Swelling in a Confined and Stressed Coal during CO2 Injection , 2003 .

[41]  Robert C. Burruss,et al.  Geochemical Investigation of the Potential for Mobilizing Non-Methane Hydrocarbons during Carbon Dioxide Storage in Deep Coal Beds , 2006 .

[42]  D. Viete,et al.  Parameters influencing the flow performance of natural cleat systems in deep coal seams experiencing carbon dioxide injection and sequestration , 2012 .

[43]  L. Connell,et al.  A theoretical model for gas adsorption-induced coal swelling , 2007 .

[44]  Jerzy Ziętek,et al.  Changes of acoustic emission and strain in hard coal during gas sorption–desorption cycles , 2007 .

[45]  John W. Larsen,et al.  Structure Changes in Pittsburgh No. 8 Coal Caused by Sorption of CO2 Gas , 2005 .

[46]  J. Pashin,et al.  Temperature–pressure conditions in coalbed methane reservoirs of the Black Warrior basin: implications for carbon sequestration and enhanced coalbed methane recovery , 2003 .

[47]  David Airey,et al.  Investigation of temperature effect on permeability of naturally fractured black coal for carbon dioxide movement: An experimental and numerical study , 2012 .

[48]  Pathegama Gamage Ranjith,et al.  The effect of CO2 on the geomechanical and permeability behaviour of brown coal: Implications for coal seam CO2 sequestration , 2006 .