ASTM_D_7676_-_18.pdf

Designation:D767618Standard Practice forScreening Organic Halides Contained in Hydrogen or OtherGaseous Fuels1This standard is issued under the fixed designation D7676;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 practice covers the screening of organic halidecontent of gaseous fuels using electron capture detection.Although primarily intended for determining organic halides inhydrogen used as a fuel for fuel cell or internal combustionengine powered vehicles,this screening method can also beused,if qualified,to measure organic halides in other gaseousfuels and gaseous matrices.1.2 The procedure described in this method was designed toscreen organic halides in hydrogen to a level much less thanrequired by SAE J2719 and the California Code ofRegulations,Title 4,Division 9,Chapter 6,Article 8,Sections4180 4181.It will yield false positive result to othercompounds that show response to the ECD detector.Samplesthat do not pass the criteria of this screening process shall betested to quantify and qualify the contaminants using TestMethod D7892.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.4 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1265 Practice for Sampling Liquefied Petroleum(LP)Gases,Manual MethodD3700 Practice for Obtaining LPG Samples Using a Float-ing Piston CylinderD7606 Practice for Sampling of High Pressure Hydrogenand Related Fuel Cell Feed GasesD7892 Test Method for Determination of Total OrganicHalides,Total Non-Methane Hydrocarbons,and Formal-dehyde in Hydrogen Fuel by Gas Chromatography/MassSpectrometry2.2 ISO Standard:3ISO TS 14687-2 Hydrogen Fuel Product Specification Part 2:Proton Exchange Membrane(PEM)Fuel CellApplications for Road Vehicles2.3 SAE Standard:4SAE J2719 Hydrogen Fuel Quality for Fuel Cell Vehicles2.4 Additional Document:5California Code of Regulations Title 4,Division 9,Chapter6,Article 8,Sections 4180 41813.Terminology3.1 Definitions:3.1.1 electron capture detector(ECD),ndetects organichalides by the reduction of a standing detector current due tothe capture of detector current electrons by the halogenatedhydrocarbons.1This practice is under the jurisdiction of ASTM Committee D03 on GaseousFuels and is the direct responsibility of Subcommittee D03.14 on Hydrogen andFuel Cells.Current edition approved Dec.15,2018.Published February 2019.DOI:10.1520/D7676-18.2For 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.3Available from International Organization for Standardization(ISO),ISOCentral Secretariat,BIBC II,Chemin de Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,http:/www.iso.org.4Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096,http:/www.sae.org.5Available from California Department of Food and Agriculture,1220 N Street,Sacramento,CA 95814,https:/www.cdfa.ca.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.1.2 fuel cell grade hydrogen,nhydrogen satisfying thespecifications in SAE J2719.3.1.3 organic halide,nany compound containing carbonand a halogen(fluorine,chlorine,bromine,or iodine).3.1.4 total organic halides,nthe sum concentration of allcompounds containing carbon and at least one halide(fluorine,chlorine,bromine,or iodine).4.Summary of Screening Method4.1 The screening of organic halides in hydrogen and othergaseous fuels can be challenging due to need to measure totalorganic halides to 0.05 mol mol(50 ppb)to satisfy hydrogenfuel contaminant requirements specified in ISO TS 14687-2,SAE J2719,and th