1、Designation:D418013(Reapproved 2018)Standard Test Method forVibratory Packing Density of Formed Catalyst Particles andCatalyst Carriers1This standard is issued under the fixed designation D4180;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、revision,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 the vibra-tory packing density of formed catalyst and cat
3、alyst carriers.For the purpose of this test,catalyst particles are defined asextrudates,spheres,or formed pellets of 0.8 to 4.8-mm(132to316-in.)nominal diameter.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standa
4、rd 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This internatio
5、nal standard was developed in accor-dance with internationally recognized 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
6、.2.Referenced Documents2.1 ASTM Standards:2D3766 Terminology Relating to Catalysts and CatalysisE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision
7、of a Test MethodE1272 Specification for Laboratory Glass Graduated Cylin-ders3.Terminology3.1 DefinitionsSee Terminology D3766.4.Summary of Test Method4.1 A preconditioned sample of formed catalyst or catalystcarrier is vibrated in a cylinder.The vibratory packing densityis determined from a known m
8、ass and vibrated volume.5.Significance and Use5.1 This test method is to be used for measuring thevibratory packing density of formed particles that will notbreak up during sampling,filling,or vibrating of the measuringcylinder under test conditions.6.Apparatus6.1 Glass Cylinders,capacity 250 mL,fee
9、d and measuring,conforming to Specification E1272,Class A.6.2 Vibrator,3conventional handheld,with hard rubber ormetal impactor.6.3 Feed Funnel,plastic,glass,or metal as shown in Fig.1.6.4 Ring Stand,Vibrator Holder and Clamps as shown inFigs.2 and 3.6.5 Desiccator,with a desiccant grade molecular s
10、ieve suchas a No.4A.6.6 Balance having sensitivity of 0.1 g.6.7 Drying Oven.7.Procedure7.1 Heat an adequate sample(s)at 400 6 15C for not lessthan 3 h.Normally,this treatment can take place in air.However,in the case of materials that might react with air atelevated temperatures(such as prereduced c
11、atalysts)the heattreatment should take place in an inert atmosphere.Cool after1This 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 May 1,2018.Published May 2018
12、.Originallyapproved in 1988.Last previous edition approved in 2013 as D4180 13.DOI:10.1520/D4180-13R18.2For 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 Docu
13、ment Summary page onthe ASTM website.3The sole source of supply of the vibrator known to the committee at this timeis Wahl Clipper Corp.,Sterling,IL.Model 4120 used at low speed is recommendedto replace Model 4180,which is discontinued.If you are aware of alternativesuppliers,please provide this inf
14、ormation to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standar
15、d 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 heating th
16、e test sample(s)in a desiccator or other suitablecontainer to eliminate the possibility of moisture adsorptionprior to testing.NOTE1These conditions may not be appropriate for all materials.NOTE2Since many catalyst formulations are strong adsorbents,theuse of a No.4A indicating(cobalt-treated)molecular sieve as a desiccat-ing medium is suggested.The desiccant should be regenerated at 220 to260C as required.7.2 Fill a tared feed-glass cylinder with 250 mL of looselypacked,dried catalyst and weigh
