ASTM D5832-1998(2014) 3798 Standard Test Method for Volatile Matter Content of Activated Carbon Samples《活性炭样品挥发物含量的标准试验方法》.pdf

1、Designation: D5832 98 (Reapproved 2014)Standard Test Method forVolatile Matter Content of Activated Carbon Samples1This standard is issued under the fixed designation D5832; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year

2、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 the determination of the per-centage of gaseous products, exclusive of moisture vapor,prese

3、nt in virgin and used activated carbons which are releasedunder specific conditions of the test.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns, if any,

4、 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:2D2652 Terminology Relating to Activated CarbonD2867

5、Test Methods for Moisture in Activated CarbonD3175 Test Method for Volatile Matter in the AnalysisSample of Coal and Coke3. Terminology3.1 Definitions For definitions of terms used in this testmethod relating to activated carbon, refer to TerminologyD2652.4. Summary of Test Method4.1 Volatile matter

6、 is determined by establishing the loss inmass resulting from heating an activated carbon sample underrigidly controlled conditions. The measured mass loss, cor-rected for moisture as determined in Test Method D2867,establishes the volatile matter content of the activated carbonsample.5. Significanc

7、e and Use5.1 Volatile matter, when determined as herein described,may be used as a relative measure of the extent of carboniza-tion in an activated carbon and the extent of loading of volatilematerial on an activated carbon that has been used in anadsorption application.5.2 Combined with other infor

8、mation, the volatile matter ofan activated carbon may be useful in evaluating its perfor-mance in an adsorption application.5.3 Other automated methods for the determination of thevolatile content of solids, such as using a thermogravimetricanalyzer (TGA), can be used in place of this test method wi

9、thequally reliable results.6. Apparatus6.1 Crucible and Cover, high temperature porcelain, highform, 30 cc capacity.6.2 Oven, forced-air circulation, capable of temperatureregulation up to 250C.6.3 Moisture Determination Apparatus , as described in TestMethod D2867.6.4 Muffle Furnace, gravity circul

10、ation, capable of tempera-ture regulation at 950 6 25C. An electric furnace similar tothe one described in Test Method D3175 is suitable for use inthis test method.6.5 Desiccator, glass with indicating type desiccant.6.6 Balance, analytical, capable of 0.1 mg sensitivity.7. Hazards7.1 The furnace us

11、ed in this test method should be located ina well ventilated area to eliminate exposure to possible toxicvapors that may evolve from the carbon sample during the hightemperature heating.7.2 Exercise care when working with the high temperaturefurnace to eliminate the possibility of burns.8. Procedure

12、8.1 Determine the moisture content of an as-received rep-resentative portion of the sample using the Xylene-Extraction1This test method is under the jurisdiction of ASTM Committee D28 onActivated Carbon and is the direct responsibility of Subcommittee D28.04 on GasPhase Evaluation Tests.Current edit

13、ion approved July 1, 2014. Published September 2014. Originallyapproved in 1995. Last previous edition approved in 2008 as D5832 98 (2008).DOI: 10.1520/D5832-98R14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Boo

14、k 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 States1Test Method described in D2867. If the as-received sample iswet, drain it of all fr

15、ee liquid before the representative sampleis taken.8.2 Weigh to 0.1 mg accuracy a crucible and cover that havebeen ignited in a muffle furnace regulated at 950C for 30 minand cooled in a desiccator. Record the weight.8.3 Using a spoon or spatula, dip from the sample bottleapproximately1goftheas-rece

16、ived sample and place it in thepre-dried and tared crucible. Cover it with a lid and immedi-ately weigh it to the nearest 0.1 mg.8.4 Place the covered crucible in the muffle furnace regu-lated at 950 6 25C for 7 min 6 10 s.8.5 Remove the covered crucible from the muffle furnaceand cool to room tempe

17、rature in a desiccator.8.6 Weigh the covered crucible to the nearest 0.1 mg.Record the weight.9. Calculation9.1 Calculate the weight loss percent as follows:Weight loss, % 5 C 2 D!/ C 2 B!# 3100 (1)where:B = mass of crucible and cover, g,C = mass of crucible, cover, and sample, g, andD = mass of cru

18、cible, cover, and de-volatilized sample, g.9.2 Calculate the volatile matter content of the sample asfollows:VM,%5 E 2 F (2)where:VM = volatile matter content of as-received sample, %,E = weight loss, % (as defined in 9.1), andF = moisture, % (as measured in 8.1).10. Precision and Bias10.1 An interl

19、aboratory study of this test method wasconducted in 1996. Each of seven laboratories tested threerandomly drawn specimens from each of three different acti-vated carbons containing volatile matter content. CarbonAwasa coconut shell gas phase carbon containing gasoline vapors.Carbon B was a coal base

20、d liquid phase carbon containingorganic components from gasoline. Carbon C was a coconutshell vapor phase carbon containing chlorinated organic com-pounds. The average volatile matter contents were 24.7 %,9.1 % and 12.9 %, respectively. In order to determine thevolatile matter content of the samples

21、, their moisture contentswere determined according to Test Method D2867 and werefound to be 3.54 %, 35.2 % and 3.87 %, respectively. PracticeE691 and E691 computer software were used to design thestudy and analyze the resulting data.10.2 95 % Limit on Repeatability (Within Laboratory), %:Activated C

22、arbonABCVoltatile Matter Content, % 1.38 0.63 0.4410.3 95 % Limit on Reprodicibility (Between Laboratories),%:Activated CarbonABCVolatile Matter Content, % 1.54 1.32 1.47NOTE 1The terms “limit on repeatability” and “limit on reproducibil-ity” are used as specified in Practice E177.11. Keywords11.1 a

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