ASTM_D_7964_-_D_7964M_-_19.pdf

Designation:D7964/D7964M19Standard Test Method forDetermining Activity of Fluid Catalytic Cracking(FCC)Catalysts in a Fluidized Bed1This standard is issued under the fixed designation D7964/D7964M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the 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 andcoke selectivity of either equilibrium or laboratory deactivatedfluid catalytic cracking(FCC)catalysts.The activity is evalu-ated on the basis of mass percent conversion of gas oil feed ina fluidized bed reactor.The coke yield is defined as the mass ofcarbon laid down on the catalyst,also expressed as a percent ofthe gas oil feed.The scope of the round robin will be limitedto the determination of activity and coke.All other analyses arethus beyond this scope and should be noted as“optional.”1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values 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,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 international 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.2.Referenced Documents2.1 ASTM Standards:2D2887 Test Method for Boiling Range Distribution of Pe-troleum Fractions by Gas ChromatographyD4463 Guide for Metals Free Steam Deactivation of FreshFluid Cracking CatalystsD5154/D5154M Test Method for Determining Activity andSelectivity of Fluid Catalytic Cracking(FCC)Catalysts byMicroactivity TestE105 Practice for Probability Sampling of MaterialsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 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 activity,na measure of the rate of a specific catalyticreaction,calculated in the present case by dividing conversionby the difference of 100 minus conversion.3.1.2 catalyst/oil(C/O)ratio,nthe mass of catalyst usedin the test divided by the mass of feed fed to the reactor.3.1.3 coke,nmass of carbon laid down on the catalystduring the FCC reaction times 1.083.3.1.4 conversion,nthe starting mass of reactant feedminus the mass of the liquid product that boils above 221 C430 F;this delta is then reported as a percentage of thestarting mass of feed.3.1.5 delivery time,nthis is the time,in seconds,duringwhich feed is introduced to the reactor.3.1.6 FCC,nfluid catalytic cracking.3.1.7 gasoline,nC5compounds through compounds boil-ing at 221 C 430 F.3.1.8 HCO,nthe heavy cycle oil product,which is definedto have a minimum boiling point of 343 C 650 F.3.1.9 LCO,nthe light cycle oil product,which is definedto have a boiling point range of 221 to 343 C 430 to 650 F.3.1.10 liquid product,nall products formed in the cata-lytic reaction that can be condensed in the chiller bathafterward,usually a combination of gasoline,LCO,and HCO,but can contain a trace of C4and C4minus compounds.3.1.11 normalized product yield,nthe result obtainedwhen each product yield has been corrected for non-perfectmass balances.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 April 1,2019.Published May 2019.Originallyapproved in 2014.Last previous edition approved in 2014 as D7964/D7964M 14.DOI:10.1520/D7964-19.2For 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.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 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 3.1.11.1 DiscussionFor a run to be judged acceptable,thetotal recovery,mass%of feed,should