ASTM D5832-1998(2008) 431 Standard Test Method for Volatile Matter Content of Activated Carbon Samples《活性炭样本中的活性挥发物测定的标准试验方法》.pdf

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1、Designation: D 5832 98 (Reapproved 2008)Standard Test Method forVolatile Matter Content of Activated Carbon Samples1This standard is issued under the fixed designation D 5832; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea

2、r 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,pre

3、sent 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 an

4、y, 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:2D 2652 Terminology Relating to Activated CarbonD 2

5、867 Test Methods for Moisture in Activated CarbonD 3175 Test Method for Volatile Matter in the AnalysisSample of Coal and Coke3. Terminology3.1 DefinitionsFor definitions of terms used in this testmethod relating to activated carbon, refer to TerminologyD 2652.4. Summary of Test Method4.1 Volatile m

6、atter 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 D 2867,establishes the volatile matter content of the activated carbonsample.5. Signi

7、ficance 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

8、 information, 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 met

9、hod withequally 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 D 2867.6.4 Muffle Furnace, gravity

10、circulation, capable of tempera-ture regulation at 950 6 25C. An electric furnace similar tothe one described in Test Method D 3175 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.1This test method is

11、under the jurisdiction of ASTM Committee D28 onActivated Carbon and is the direct responsibility of Subcommittee D28.04 on GasPhase Evaluation Tests.Current edition approved Aug. 1, 2008. Published September 2008. Originallyapproved in 1995. Last previous edition approved in 2003 as D 5832 98 (2003)

12、.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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box

13、 C700, West Conshohocken, PA 19428-2959, United States.7. Hazards7.1 The furnace used 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

14、with the high temperaturefurnace to eliminate the possibility of burns.8. Procedure8.1 Determine the moisture content of an as-received rep-resentative portion of the sample using the Xylene-ExtractionTest Method described in D 2867. If the as-received sample iswet, drain it of all free liquid befor

15、e 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-received sample and

16、 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 temperature in a des

17、iccator.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!# 3 100(1)where:B = mass of crucible and cover, g,C = mass of crucible, cover, and sample, g, andD = mass of crucible, cover, a

18、nd 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 interlaboratory study

19、 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 based liquid phase

20、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, their moistur

21、e contentswere determined according to Test Method D 2867 and werefound to be 3.54 %, 35.2 % and 3.87 %, respectively. PracticeE 691 and E 691 computer software were used to design thestudy and analyze the resulting data.10.2 95 % Limit on Repeatability (Within Laboratory), %:Activated CarbonABCVolt

22、atile 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 E 177.11. Keywords11.1 activated ca

23、rbon; volatile matterASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringemen

24、t of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or f

25、or additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views know

26、n to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 5832 98 (2008)2