1、Designation:D346606(Reapproved 2018)Standard Test Method forIgnition Temperature of Granular Activated Carbon1This standard is issued under the fixed designation D3466;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、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 the determination of referenceignition temperature of granular activated carbon in flowingair.This test
3、method provides a basis for comparing theignition characteristics of different carbons,or the change inignition characteristics of the same carbon after a period ofservice.1.2 The ignition temperature,as determined by this testmethod,cannot be interpreted as the probable ignition tem-perature of the
4、 same carbon under the operating conditions ofa specific application unless those conditions are essentially thesame as those in this test method.2If it is desired to determinethe ignition temperature of the carbon under a specific set ofoperating conditions,the test may be modified to simulate such
5、conditions,taking into consideration the following variables:(1)air flow rate;(2)moisture content of the carbon;(3)beddepth;(4)relative humidity of the air stream;(5)heating rate;(6)contaminants(for example,hydrocarbons,etc.)in the airstream;and(7)contaminants that may have been adsorbed bythe carbo
6、n under prior service conditions.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 th
7、is standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific precautionary statements are given in Section 7.1.5 This international standard was developed in accor-dance with internationally recognize
8、d 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:3D2652 Terminology Relating to
9、 Activated CarbonD2854 Test Method for Apparent Density of ActivatedCarbonD3195/D3195M Practice for Rotameter CalibrationE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE220 Test Method for Calibration of Thermocouples ByComparison TechniquesE300 Practice for Sampling Industrial Chem
10、icals3.Terminology3.1 DefinitionsTerms relating to this test method aredefined in Terminology D2652.4.Summary of Test Method4.1 Asample of carbon is exposed to a heated air stream,thetemperature of which is slowly increased until the carbonignites.The temperature of the carbon bed and of the airente
11、ring the bed are recorded,and ignition is defined as thepoint at which the carbon temperature suddenly rises above thetemperature of the air entering the bed.5.Significance and Use5.1 Activated carbons used in gas-phase adsorption may besubjected to heating,either from heat applied externally to the
12、carbon bed,or heat generated by radioactive4contaminants,orby the adsorption process itself.If the application of heat issudden,or if no ample means to conduct the heat from thecarbon bed exists,the carbon bed may ignite.This test methodprovides a controlled laboratory test to determine the tempera-
13、tures at which such ignition occurs.As stated in 1.2,this doesnot necessarily give the temperature at which ignition willoccur under a specific bed operating condition.This testmethod does,however,allow some ranking of carbons with1This test method is under the jurisdiction of ASTM Committee D28 onA
14、ctivated Carbon and is the direct responsibility of Subcommittee D28.04 on GasPhase Evaluation Tests.Current edition approved June 1,2018.Published June 2018.Originallyapproved in 1976.Last previous edition approved in 2011 as D4366 06(2011).DOI:10.1520/D3466-06R18.2Suzin,Y.,et al.,Carbon,Vol 37,199
15、9,pp.335346.3For 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.4Milham and Kovoch,“Treatment of Airborne Radioactive
16、Wastes,”Interna-tional Atomic Energy Agency,Vienna,1968(Paper SM-110/49).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 reg