1、Designation:D3907/D3907M19Standard Test Method forTesting Fluid Catalytic Cracking(FCC)Catalysts byMicroactivity Test1This standard is issued under the fixed designation D3907/D3907M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,th
2、e year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers determining the activity ofequilibrium or laboratory-deactivated fluid catalytic cracking
3、(FCC)catalysts,or both.This is evaluated on the basis of masspercent conversion of gas oil feed in a microactivity unit.Theselectivity of FCC catalysts can be determined using TestMethod D5154.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The v
4、alues stated ineach system are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.1.3 This standard does not purport to address all of thesafety concerns,if any,as
5、sociated 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 international standard was developed in accor-dance with internationally rec
6、ognized 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.2.Referenced Documents2.1 ASTM Standards:2D2887 Test Method for B
7、oiling Range Distribution of Pe-troleum Fractions by Gas ChromatographyD5154 Test Method for DeterminingActivity and Selectivityof Fluid Catalytic Cracking(FCC)Catalysts by Microac-tivity TestE105 Practice for Probability Sampling of MaterialsE177 Practice for Use of the Terms Precision and Bias inA
8、STM Test MethodsE456 Terminology Relating to Quality and StatisticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 ASTM consensus mean conversioneach referencecatalyst has a consensu
9、s mean conversion value assigned to itby Committee D32(see 11.2).3.1.2 ASTM reference catalystsa set of equilibrium fluidcracking catalysts3with conversions within the useful range ofthis test method is used to improve the reproducibility of testresults between different laboratories.3.1.3 ASTM stan
10、dard feeda specific batch of gas oil that isused as feedstock in the described test method.33.1.4 conversion calibration curvea calibration curve canbe obtained by plotting the consensus mean conversion valuesfor the ASTM reference catalysts(see 11.2)or the knownconversion values for other suitable
11、reference catalysts versusthe individual laboratory-measured conversion for the samecatalysts.3.1.5 measured conversioncalculated as the differencebetween the mass of feed used and the mass of unconvertedmaterial divided by the mass of feed used times 100%.Theunconverted material is defined as all l
12、iquid product with aboiling point above 216 C 421 F.4.Summary of Test Method4.1 A sample of cracking catalyst in a fixed-bed reactor iscontacted with gas oil feed(ASTM standard feed or othersuitable feedstock).Cracked liquid products are analyzed forunconverted material and the conversion is calcula
13、ted.4.2 A corrected conversion value can be obtained from themeasured conversion and the conversion calibration curve.1This test method is under the jurisdiction of ASTM Committee D32 onCatalysts and is the direct responsibility of Subcommittee D32.04 on CatalyticProperties.Current edition approved
14、April 1,2019.Published April 2019.Originallyapproved in 1992.Last previous edition approved in 2013 as D3907/D3907M 13.DOI:10.1520/D3907_D3907M-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards vo
15、lume information,refer to the standards Document Summary page onthe ASTM website.3Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D32-1016.ContactASTM CustomerService at serviceastm.org.Copyright ASTM International,100 Barr Harbo
16、r Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard 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 5.Significance and Use5.1 The microactivity test provides data to assess the rela-tive performance of FCC catalysts.Bec
