S.Haoetal./ColloidsandSurfacesA:Physicochem.Eng.Aspects444 (2014) 104–113

113

accountuniquenessoftheinteractionbetweenanadsorbateandaparticularadsorbent.Although,Schwarz’smethodaccountsforadsorbate-adsorbateandadsorbate-adsorbentinteractions,theadsorptiondatafailedtobereducedtotemperatureindependentplots.

Amodi edprocedureofdeterminingthevalueofparameter,k,inSchwarz’sequation,i.e.Eq.(10)wasproposed.Whenthisnewprocedurewasappliedtoanalyzethelaboratoryadsorptiondata,theadsorptiondatacanbereducedtosingletemperatureinvariantcharacteristiccurvesforthecoals.

Theformofcharacteristiccurvecouldin uenceD–ingcubicpolynomialascharacteristiccurveformcouldresultinanabnormalprediction.Thatistosaytheadsorptionamountwouldincreasewiththepressuredropping.AnewformofcharacteristiccurvededucedfromD–Aequationwasproposed.ThepredictionuncertaintyofD–Aequationbyusingthischarac-teristiccurveformislessthanthatforusingcubicpolynomialascharacteristiccurveform.

Acknowledgements

ThisworkwassupportedbytheNationalBasicResearchPro-gramofChina(973Program,No.2011CB201202)andtheNationalNaturalScienceFoundationofChina(20776089).

TheauthorsalsothankJingjieLuo,WenjingSun,NingWangandYanyanFengfortheirhelpfuldiscussions.

AppendixA.Supplementarydata

Supplementarydataassociatedwiththisarticlecanbefound,intheonlineversion,at/10.1016/j.colsurfa.2013.12.047.

References

[1]V.K.Gupta,I.Ali,T.A.Saleh,A.Nayak,S.Agarwal,Chemicaltreatmenttechnolo-giesforwaste-waterrecycling-anoverview,RSCAdv.2(2012)6380–6388.[2]S.A.Grieco,B.V.Ramarao,RemovalofTCEPfromaqueoussolutionsbyadsorp-tionwithzeolites,ColloidsSurf.A434(2013)329–338.

[3]V.K.Gupta,S.Agarwal,T.A.Saleh,Chromiumremovalbycombiningthemag-neticpropertiesofironoxidewithadsorptionpropertiesofcarbonnanotubes,WaterRes.45(2011)2207–2212.

[4]X.Liu,R.Zhu,J.Ma,F.Ge,Y.Xu,Y.Liu,Moleculardynamicssimulationstudy

ofbenzeneadsorptiontomontmorillonite:in uenceofthehydrationstatus,ColloidsSurf.A434(2013)200–206.

[5]A.K.Jain,V.K.Gupta,A.Bhatnagar,Suhas,Acomparativestudyofadsorbents

preparedfromindustrialwastesforremovalofdyes,Sep.Sci.Technol.38(2003)463–481.

[6]T.A.Moore,Coalbedmethane:Areview,Int.J.CoalGeol.101(2012)36–81.[7]A.Busch,Y.Gensterblum,CBMandCO2-ECBMrelatedsorptionprocessesin

coal:areview,Int.J.CoalGeol.87(2011)49–71.

[8]C.R.Clarkson,R.M.Bustin,Variationinmicroporecapacityandsizedistribution

withcompositioninbituminouscoaloftheWesternCanadiansedimentarybasin:implicationsforcoalbedmethanepotential,Fuel75(1996)1483–1498.[9]A.Liu,X.Fu,K.Wang,H.An,G.Wang,Investigationofcoalbedmethanepoten-tialinlow-rankcoalreservoirs-freeandsolublegascontents,Fuel112(2013)14–22.

[10]F.Liu,W.Chu,W.Sun,Y.Xue,Q.Jiang,ADFTstudyofmethaneactivationon

graphitesurfaceswithvacancydefects,J.Nat.GasChem.21(2012)708–712.[11]C.R.Clarkson,R.M.Bustin,J.H.Levy,Applicationofthemono/multilayerand

adsorptionpotentialtheoriestocoalmethaneadsorptionisothermsatelevatedtemperatureandpressure,Carbon35(1997)1689–1705.

[12]Q.Jiang,W.Chu,W.-J.Sun,F.-S.Liu,Y.Xue,ADFTstudyofmethaneadsorption

onnitrogen-containingorganicheterocycles,ActaPhys.Chim.Sin.28(2012)1101–1106.

[13]M.Bhagiyalakshmi,P.Hemalatha,M.Palanichamy,H.T.Jang,Adsorption,

regenerationandinteractionofCO2withapolythiophene-carbonmesocom-posite,ColloidsSurf.A374(2011)48–53.

[14]R.Barbero,L.Carnelli,A.Simon,A.Kao,A.D.Monforte,M.Ricco,D.Bianchi,A.

Belcher,EngineeredyeastforenhancedCO2mineralization,EnergyEnviron.Sci.6(2013)660–674.

[15]H.Jeon,Y.J.Min,S.H.Ahn,S.M.Hong,J.S.Shin,J.H.Kim,K.B.Lee,Graftcopolymer

templatedsynthesisofmesoporousMgO/TiO2mixedoxidenanoparticlesandtheirCO2adsorptioncapacities,ColloidsSurf.A414(2012)75–81.

[16]Y.-S.Jun,D.E.Giammar,C.J.Werth,D.A.Dzombak,Environmentalandgeo-chemicalaspectsofgeologiccarbonsequestration:aspecialissue,Environ.Sci.Technol.47(2013)1–2.

[17]E.Santini,E.Guzman,F.Ravera,A.Ciajolo,M.Alfe,L.Liggieri,M.Ferrari,Soot

particlesattheaqueousinterfaceandeffectsonfoamsstability,ColloidsSurf.A413(2012)216–223.

[18]M.K.Mondal,H.K.Balsora,P.Varshney,ProgressandtrendsinCO2cap-ture/separationtechnologies:areview,Energy46(2012)431–441.

[19]C.M.White,D.H.Smith,K.L.Jones,A.L.Goodman,S.A.Jikich,Count,S.B.

DuBose,E.Ozdemir,B.I.Morsi,K.T.Schroeder,Sequestrationofcarbondioxideincoalwithenhancedcoalbedmethanerecovery:areview,EnergyFuels19(2005)659–724.

[20]S.A.Mohammad,A.Arumugam,R.L.Robinson,K.A.M.Gasem,High-pressure

adsorptionofpuregasesoncoalsandactivatedcarbon:measurementsandmodeling,EnergyFuels26(2012)536–548.

[21]H.Xie,H.Zhou,D.Xue,H.Wang,R.Zhang,F.Gao,Researchandconsideration

ondeepcoalminingandcriticalminingdepth,J.ChinaCoalSoc.37(2012)535–542.

[22]D.D.Do,AdsorptionAnalysis:EquilibriaandKinetics,ImperialCollegePress

London,London,1998.

[23]X.Wang,B.Lee,H.T.Chua,Methanedesorptionandadsorptionmeasurements

onactivatedcarbonin281–343Kandpressuresto1.2MPa,J.Therm.Anal.Calorim.110(2012)1475–1485.

[24]J.Wen,X.Han,H.Lin,Y.Zheng,W.Chu,Acriticalstudyontheadsorptionof

heterocyclicsulfurandnitrogencompoundsbyactivatedcarbon:equilibrium,kinetics,andthermodynamics,Chem.Eng.J.164(2010)29–36.

[25]W.S.Loh,A.B.Ismail,B.Xi,K.C.Ng,W.G.Chun,Adsorptionisothermsandisos-tericenthalpyofadsorptionforassortedrefrigerantsonactivatedcarbons,J.Chem.Eng.Data57(2012)2766–2773.

[26]K.A.G.Amankwah,J.A.Schwarz,Amodi edapproachforestimatingpseudo-vaporpressuresintheapplicationoftheDubinin–Astakhovequation,Carbon33(1995)1313–1319.

[27]H.J.Kim,Y.Shi,J.He,H.-H.Lee,C.-H.Lee,AdsorptioncharacteristicsofCO2and

CH4ondryandwetcoalfromsubcriticaltosupercriticalconditions,Chem.Eng.J.171(2011)45–53.

[28]M.G.Plaza,F.Rubiera,J.J.Pis,C.Pevida,Ammoxidationofcarbonmaterialsfor

CO2capture,Appl.Surf.Sci.256(2010)6843–6849.

[29]S.Hao,J.Wen,X.Yu,W.Chu,Effectofthesurfaceoxygengroupsonmethane

adsorptiononcoals,Appl.Surf.Sci.264(2013)433–442.

[30]J.Xu,W.Chu,S.Luo,SynthesisandcharacterizationofmesoporousV-MCM-41

molecularsieveswithgoodhydrothermalandthermalstability,J.Mol.Catal.A:Chem.256(2006)48–56.

[31]K.A.Rahman,W.S.Loh,H.Yanagi,A.Chakraborty,B.B.Saha,W.G.Chun,K.C.Ng,

Experimentaladsorptionisothermofmethaneontoactivatedcarbonatsub-andsupercriticaltemperatures,J.Chem.Eng.Data55(2010)4961–4967.

[32]J.Luo,Y.Liu,C.Jiang,W.Chu,J.Wen,H.Xie,Experimentalandmodelingstudy

ofmethaneadsorptiononactivatedcarbonderivedfromanthracite,J.Chem.Eng.Data56(2011)4919–4926.

[33]V.M.Gun’ko,Y.V.Zaulychnyy,B.I.Ilkiv,V.I.Zarko,Y.M.Nychiporuk,E.M.

Pakhlov,Y.G.Ptushinskii,R.Leboda,J.Skubiszewska-Zieba,Texturalandelectroniccharacteristicsofmechanochemicallyactivatedcompositeswithnanosilicaandactivatedcarbon,Appl.Surf.Sci.258(2011)1115–1125.

[34]L.Zhou,Y.P.Zhou,M.Li,P.Chen,Y.Wang,Experimentalandmodelingstudy

oftheadsorptionofsupercriticalmethaneonahighsurfaceactivatedcarbon,Langmuir16(2000)5955–5959.

[35]B.B.Saha,S.Koyama,I.I.El-Sharkawy,K.Habib,K.Srinivasan,P.Dutta,Eval-uationofadsorptionparametersandheatsofadsorptionthroughdesorptionmeasurements,J.Chem.Eng.Data52(2007)2419–2424.

[36]X.Wang,J.French,S.Kandadai,H.T.Chua,Adsorptionmeasurementsof

methaneonactivatedcarboninthetemperaturerange(281to343)Kandpressuresto1.2MPa,J.Chem.Eng.Data55(2010)2700–2706.

[37]D.M.Ruthven,PrinciplesofAdsorptionandAdsorptionProcesses,JohnWiley

&Sons,NewYork,1984.

[38]Y.Zhou,L.Zhou,Studyontheadsorptionisothermsofsupercriticalhydrogen

onactivatedcarbon,ActaPhys.Chim.Sin.13(1997)119–127.

[39]NIST,Thermophysicalpropertiesof uidsystems,http://webbook.nist.gov/

chemistry/ uid/

[40]M.Li,A.Gu,X.Lu,R.Wang,Studyonmethaneadsorptionabovecriticaltem-peraturebyadsorptionpotentialtheory,Nat.GasChem.Ind.28(2003)28–31.[41]X.Su,R.Chen,X.Lin,S.Guo,Theadsorptioncharacteristiccurvesof13CH4and

12

CH4oncoalanditsapplication,J.ChinaCoalSoc.32(2007)539–543.

[42]Y.Fen,W.Chu,W.Sun,Adsorptioncharacteristicsofmethaneoncoalunder

reservoirtemperatures,J.ChinaCoalSoc.37(2012)1488–1492.

[43]R.K.Agarwal,J.A.Schwarz,Analysisofhighpressureadsorptionofgaseson

activatedcarbonbypotentialtheory,Carbon26(1988)873–887.

[44]S.Ozawa,S.Kusumi,Y.Ogino,Physicaladsorptionofgasesathighpressure

IV:animprovementoftheDubinin-Astakhovadsorptionequation,J.ColloidInterfaceSci.56(1976)83–91.

[45]W.S.Loh,K.A.Rahman,A.Chakraborty,B.B.Saha,Y.S.Choo,B.C.Khoo,K.C.Ng,

Improvedisothermdataforadsorptionofmethaneonactivatedcarbons,J.Chem.Eng.Data55(2010)2840–2847.

[46]B.Nie,S.Duan,Theadsorptionessenceofgasoncoalsurface,J.TaiyuanUniv.

Technol.29(1998)417–421.

[47]X.Su,R.Chen,X.Lin,Y.Song,Applicationofadsorptionpotentialtheoryinthe

fractionationofcoalbedgasduringtheprocessofadsorption/desorption,ActaGeol.Sin.82(2008)1382–1389.