ASTM D5832-1998(2003) 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 2003)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 (e) 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,pr

3、esent in virgin and used activated carbons which are releasedunder specific conditions of the test.1.2 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 healt

4、h practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:D 2652 Terminology Relating to Activated Carbon2D 2867 Test Method for Moisture in Activated Carbon2D 3175 Test Method for Volatile Matter in the AnalysisSample of Coal and C

5、oke33. 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 matter is determined by establishing the loss inmass resulting from heating an activated carbon sample underrigidly control

6、led 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. Significance and Use5.1 Volatile matter, when determined as herein described,may be used as a relative measure of the extent of

7、 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 information, the volatile matter ofan activated carbon may be useful in evaluating its perfor-mance in an adsorption appl

8、ication.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 withequally reliable results.6. Apparatus6.1 Crucible and Cover, high temperature porcelain, highform, 30 cc capacity.

9、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 circulation, capable of tempera-ture regulation at 950 6 25C. An electric furnace similar tothe one described in Test Meth

10、od 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.7. Hazards7.1 The furnace used in this test method should be located ina well ventilated area to eliminate exposure to possible toxicvapors tha

11、t 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. Procedure8.1 Determine the moisture content of an as-received rep-resentative portion of the sample using the Xylene-Extract

12、ionTest Method described in D 2867. If the as-received sample iswet, drain it of all free 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 wei

13、ght.8.3 Using a spoon or spatula, dip from the sample bottleapproximately1goftheas-received 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.1This test method is under the jurisdiction of ASTM Committee D28 onActivated Carbon

14、 and is the direct responsibility of Subcommittee D28.04 on GasPhase Evaluation Tests.Current edition approved March 10, 2003. Published July 2003. Originallyapproved in 1995. Last previous edition approved in 1998 as D 5832 98.2Annual Book of ASTM Standards, Vol 15.01.3Annual Book of ASTM Standards

15、, Vol 05.05.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 tempera

16、ture 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!# 3 100(1)where:B = mass of crucible and cover, g,C = mass of crucible, cover, and sample, g, andD = mass of cruci

17、ble, 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 interlab

18、oratory 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. Carbon A wasa coconut shell gas phase carbon containing gasoline vapors.Carbon B was a coal base

19、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

20、, their moisture 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), %:Activate

21、d CarbonABCVoltatile 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

22、.1 activated carbon; 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 ris

23、kof infringement 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 thi

24、s standard or for 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

25、your views known 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 (2003)2