ASTM_D_3827_-_92_2012.pdf

Designation:D382792(Reapproved 2012)Standard Test Method forEstimation of Solubility of Gases in Petroleum and OtherOrganic Liquids1This standard is issued under the fixed designation D3827;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a procedure for estimating theequilibrium solubility of several common gases in petroleumand synthetic lubricants,fuels,and solvents,at temperaturesbetween 0 and 488 K.1.2 This test method is limited to systems in which polarityand hydrogen bonding are not strong enough to cause seriousdeviations from regularity.Specifically excluded are suchgases as HCl,NH3,and SO2,and hydroxy liquids such asalcohols,glycols,and water.Estimating the solubility of CO2in nonhydrocarbons is also specifically excluded.1.3 Highly aromatic oils such as diphenoxy phenyleneethers violate the stated accuracy above 363 K,at which pointthe estimate for nitrogen solubility is 43%higher than theobservation.1.4 Lubricants are given preference in this test method tothe extent that certain empirical factors were adjusted to thelubricant data.Estimates for distillate fuels are made from thelubricant estimates by a further set of empirical factors,and areless accurate.Estimates for halogenated solvents are made as ifthey were hydrocarbons,and are the least accurate of the three.1.5 The values stated in SI units are to be regarded as thestandard.The values in parentheses are for information only.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1218 Test Method for Refractive Index and RefractiveDispersion of Hydrocarbon LiquidsD1250 Guide for Use of the Petroleum Measurement TablesD1298 Test Method for Density,Relative Density(SpecificGravity),or API Gravity of Crude Petroleum and LiquidPetroleum Products by Hydrometer MethodD2502 Test Method for Estimation of Mean Relative Mo-lecular Mass of Petroleum Oils from Viscosity Measure-mentsD2503 Test Method for Relative Molecular Mass(MolecularWeight)of Hydrocarbons by Thermoelectric Measure-ment of Vapor Pressure3.Terminology3.1 Definitions:3.1.1 Bunsen coeffcient,nthe solubility of a gas,ex-pressed as the gas volume reduced to 273 K(32F)and 0.10MPa(1 atm),dissolved by one volume of liquid at the specifiedtemperature and 0.10 MPa.3.1.2 Ostwald coeffcient,nthe solubility of a gas,ex-pressed as the volume of gas dissolved per volume of liquidwhen both are in equilibrium at the specified partial pressure ofgas and at the specified temperature.3.2 Definitions of Terms Specific to This Standard:3.2.1 distillate fuel,na petroleum product having a mo-lecular weight below 300 g/mol.3.2.2 halogenated solvent,na partially or fully haloge-nated hydrocarbon having a molar volume below 300 mL/mol.3.2.3 solubility parameter,nthe square root of the internalenergy change(heat absorbed minus work done)of vaporiza-tion per unit volume of liquid,at 298 K.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.L0.07 on Engineering Sciences of High Performance Fluids and Solids(Formally D02.1100).Current edition approved April 15,2012.Published May 2012.Originallyapproved in 1979.Last previous edition approved in 2007 as D382792(2007).DOI:10.1520/D3827-92R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.3.1 DiscussionFor gases in Table 1,the liquid ishypothetical and the values were calculated from actual solu-bility data.3.3 Symbols:B=Bunsen coefficient at the specified condition,r=density of liquid at 288 K(60F),g/mL,rt=density of liquid at specified temperature,g/mL,G=solubility in mg/k,H=Henrys law constant,MPa,M1=molecular weight of liquid,g/mol,M2=molecular weight of gas,g/mol,nD=refractive index of liquid,sodium D-line at 298 K,p=partial pressure of gas,MPa,pv=vapor pressure of liquid,MPa,T=specified temperature,K,L=Ostwald coefficient at T,X=mole fraction of gas in equilibrium solution,d1=solubility parameter of liquid,(MPa)12,d2=equivalent solubility parameter of gas,(MPa)12,andfi=volume fraction of component i in a mixture of liquids.4.Summary of Test Method4.1 The solubility of gases in petroleum and other organicliquids may be calcul