ASTM D4513-2011(2017) Standard Test Method for Particle Size Distribution of Catalytic Materials by Sieving《用筛分法测定催化材料粒度分布的标准试验方法》.pdf

1、Designation: D4513 11 (Reapproved 2017)Standard Test Method forParticle Size Distribution of Catalytic Materials by Sieving1This standard is issued under the fixed designation D4513; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,

2、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 test method covers the determination of particlesize distribution of catalytic powder material using

3、a sievinginstrument and is one of several found valuable for themeasurement of particle size. This test method is particularlysuitable for particles in the 20 to 420-m range.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.

4、2.1 ExceptionIn 5.2, mesh size is the standard unit ofmeasure.1.3 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 health practices and determine the applica

5、-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E11 Specification for Woven Wire Test Sieve Cloth and TestSievesE161 Specification for Precision Electroformed SievesE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Rel

6、ating to Quality and Statistics3. Summary of Test Method3.1 A 50 % relative humidity-equilibrated sample of knownweight is allowed to fractionate on a series of various sizesieves to allow the various particle sizes to be collected onsuccessively smaller sieve openings.3.2 The sample fraction collec

7、ted on each sieve of the seriesis weighed and its fractional part of the original sample isdetermined.4. Significance and Use4.1 This test method can be used to determine particle sizedistributions of catalysts and supports for materialsspecifications, manufacturing control, and research and devel-o

8、pment work.5. Apparatus5.1 Laboratory Sieving Instrument, automatic with timerpreferred.5.2 U.S. Standard Sieves, or equivalent, to include microme-tres (mesh) 425(40), 250(60), 177(80), 149(100), 105(140),74(200), 44(325) and electroformed 30 and 20 micrometres.Because of their superior uniformity

9、and resistance to distor-tion or damage during use, electroformed sieves, preferablywith square holes, are recommended. Sieves with diametersbetween 6 and 10 cm are suggested.5.3 Ultrasonic Cleaning Tank, 100 W.5.4 Transmitted Light Microscope, 300 magnification, withcalibrated scale eyepiece.5.5 He

10、at Gun Dryer, (hair dryer or equivalent).5.6 Analytical Balance, capable of weighing to 0.001 g.5.7 Sample Splitter, Chute Type, or Spinning Riffler, withspinning riffler preferred.6. Reagents6.1 Antistatic Coating, (record cleaning spray or equiva-lent.)6.2 Alcohol-Water SolutionOne part ethanol to

11、 nine partsdeionized or distilled water.7. Sampling7.1 The sample must be free-flowing and homogeneous. Ifparticle size segregation is apparent to either the eye or fromobservation under a microscope, remix and resample thematerial using the proper riffling procedure.7.2 Equilibrate the sample at 20

12、 to 25C (68 to 77F) in adesiccator with a humidity level of 50 %. A 24-h period isusually sufficient.1This test method is under the jurisdiction of ASTM Committee D32 onCatalysts and is the direct responsibility of Subcommittee D32.02 on Physical-Mechanical Properties.Current edition approved Feb. 1

13、, 2017. Published February 2017. Originallyapproved in 1985. Last previous edition approved in 2011 as D451311). DOI:10.1520/D4513-11R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i

14、nformation, 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardi

15、zation 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.18. Calibration and Standardization8.1 Prior to use, check all sieves for damage or impropercl

16、eaning. If woven-wire sieves are used rather than the pre-ferred electroformed sieves, it is especially important tocarefully inspect the wire surface for wear, misalignment, tears,creases, or separation along the edges.NOTE 1Specifications for wire cloth sieves are described in Specifi-cation E11 a

17、nd specifications for electroformed sieves are described inSpecification E161.9. Procedure9.1 Select appropriate sieves for the sample being analyzed,typically the 149, 105, 74, 44, and 20-m sieves.NOTE 2For optimum results, the estimated particle size should bedetermined by microscopic examination

18、at 100300X. Sieves may then beselected to cover the size range of the particles.9.2 Clean 44 and 20-m sieves prior to use in an ultrasonicbath using a 10 % ethanol, 90 % water mixture. Dry the sievesin a low temperature air jet (hair dryer or equivalent) and allowto equilibrate at room temperature f

19、or 30 min before obtainingthe tare weights.9.3 Tare each sieve and the fines collector pan, recordingeach weight to the nearest 0.001 g.9.4 After taring, moisten a sheet of tissue paper withantistatic spray and coat the inside wall surface of each sieveby rubbing with the coated tissue.9.5 Place the

20、 sieves in a vertical stack in descending orderby mesh size (largest on top).9.6 Weigh a suitable amount of sample obtained by riffling,normally 0.5 to 1.0 g, and transfer into the largest mesh sieveat the top of the stack.9.7 Complete the assembly of the apparatus.9.8 Turn on and adjust to provide

21、rapid transport through thesieves.9.9 Continue sieving for 2 min after no further separation isdetectable.NOTE 3After completion of sieving, none of the sieves should containmore than two to three particle layers. For most powder samples, 0.5 g ofsample provides a satisfactory quantity distribution.

22、9.10 Stop the sieve action.9.11 Remove sieves carefully and weigh each sieve and thepan separately. Note the gross weight for each one and recordabove the corresponding tare weight.9.12 Sum the weight of sample on each sieve and the pan toobtain the total weight of the recovered sample. The totalwei

23、ght of recovered material should check within 5 mg of thestarting sample weight.NOTE 4Examine the sieve fractions under a microscope to determinewhether the sieve particles in each fraction are within the size rangebetween the sieve and the next coarser sieve. If appreciable finer or coarserparticle

24、s are present, tackiness is indicated. Dry and reequilibrate thesample and repeat the analysis.10. Presentation10.1 Calculate the weight percent of sample on each sieveby multiplying the net weight of each fraction by 100 anddividing by the total weight the total weight of recoveredsample.Weight% si

25、eve fraction 5 100 3 S 2 T!/Wwhere:S = total weight after sieving, g,T = tare weight of sieve, g, andW = total weight of recovered sample, g.10.1.1 Calculate the cumulative percentage passing througheach sieve by adding its fractional percentage to the fractionalpercentage of all coarser sieves, and

26、 subtracting the total from100 %. See Table 1 for an example of the calculations andpresentation.10.2 Median Particle SizeThe median particle size maybe determined by plotting the cumulative percentage dataagainst the mesh size and determining the size correspondingto 50 %.11. Precision and Bias (No

27、te 5)11.1 Agreement among individual measurements was deter-mined using an equilibrium fluid cracking catalyst. Experimen-tal repeatability was measured for a number of analyses in eachof five laboratories. Experimental reproducibility was deter-mined by comparison of results from all seven of the l

28、abora-tories participating in the round-robin testing program. Pairs oftest results obtained by a procedure similar to that describedherein are expected to differ in absolute value by less than2.77S, where 2.77S is the 95 % probability limit on thedifference between two test results, and S is the ap

29、propriateestimate of standard deviation.NOTE 5Use of the terms “repeatability,” “reproducibility,”“precision,” and “bias” are in accordance with Terminology E456 andPractice E177.11.1.1 Experimental Repeatability3Repeatability is usedto designate the ability of an instrument to report the sameanswer

30、 assuming no sample bias or operator influence. Ameasure of instrument repeatability is the standard deviation ofa number of runs. The results of testing the equilibrium fluidcatalytic cracking catalyst sample in each of five laboratoriesproduced an average standard deviation of the interpolated3Sup

31、porting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D32-1015.TABLE 1 Presentation of Data Weight of Sample Used, 0.610 gSieve No.Mesh SizemicronsNet Weight,gWeight %Sieve FractionCumulative %Passing100 149 0.037 6.1 93.9140 105 0.034 5.

32、6 88.3200 74 0.083 13.6 74.7325 44 0.193 31.6 43.1635 20 0.196 32.1 11.0Pan 0.067 11.0Total weight recovered 0.610 100.0D4513 11 (2017)2weight percent median diameter of 0.39 m, corresponding toa 2.77S % value of 61.7 %.11.1.2 Experimental Reproducibility3Reproducibilityamong instruments is used to

33、measure the ability of severalinstruments to produce results which should be the same. Thisparameter takes into account any manufacturing differences ininstruments, any bias in formulating the samples, and anyoperator influence in performing the analyses. Experimentalreproducibility of the seven lab

34、oratories when analyzing theequilibrium fluid catalytic cracking catalyst sample materialresulted in a median (50th percentile) value of 64.3 m with astandard deviation of 1.9 m, corresponding to a 2.77S % valueof 68.2 %.11.2 BiasStandard reference material is not presentlyavailable for determining

35、bias.12. Keywords12.1 catalyst; particle size; sieves; sievingASTM 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

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38、ir hearing you shouldmake 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 st

39、andard 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 11 (2017)3