1、Designation: D5234 92 (Reapproved 2017)Standard Guide forAnalysis of Ethylene Product1This standard is issued under the fixed designation D5234; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in
2、 parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide covers and provides direction for the analysisof ethylene product in a way that allows the analyst to know thepossible test methods,
3、the units of measure, and the potentialconcentrations range of possible components, so that theconsistency of the analytical measurements is improved. Thisguide is not intended to be used, nor to be construed in anyway, as a set of specifications for ethylene product.1.2 The values stated in SI unit
4、s are to be regarded as thestandard.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-bility of regulatory limi
5、tations prior to use.2. Referenced Documents2.1 ASTM Standards:2D2504 Test Method for Noncondensable Gases in C2andLighter Hydrocarbon Products by Gas ChromatographyD2505 Test Method for Ethylene, Other Hydrocarbons, andCarbon Dioxide in High-Purity Ethylene by Gas Chroma-tographyD3246 Test Method f
6、or Sulfur in Petroleum Gas by Oxida-tive MicrocoulometryD4178 Practice for Calibrating Moisture AnalyzersD4468 Test Method for Total Sulfur in Gaseous Fuels byHydrogenolysis and Rateometric ColorimetryF307 Practice for Sampling Pressurized Gas for Gas Analy-sis3. Terminology3.1 Definitions:3.1.1 eth
7、ylene product, nhydrocarbon product containingat least 99.85 % mass ethylene.3.2 Symbols:3.2.1 C4s, nsaturated and unsaturated four carbon hydro-carbon compounds.3.2.2 COS, ncarbonyl sulfide.3.2.3 GC, ngas chromatograph.3.2.4 FPD, nflame photometric detector.3.2.5 IC, nion chromatograph.3.2.6 MeOH,
8、nmethanol.3.2.7 NO, nnitric oxide.3.2.8 NO2,nnitrogen dioxide.3.2.9 O2,noxygen.3.2.10 sp. ion electrode, nspecific ion electrode.4. Significance and Use4.1 When the various producers and users of ethyleneproduct deal with the results obtained in analytical testing,inconsistency of units and test met
9、hods may cause majorerrors. This guide provides an overview of the typical concen-trations of the possible components found in ethylene product,the methods used in analysis, and the units of measure. Thisoverview is intended to be used to improve the consistency ofmethods and the units reported so t
10、hat errors are minimized.Each producer and user of ethylene product should immedi-ately review this guide to improve their awareness of thevarious analytical methods in use, the units of measure, andconcentration levels of the possible components.4.2 Although this guide is not to be used for specifi
11、cations,it can provide a starting point for the various parties to developmutually agreed upon specifications that meet their respectiverequirements. It can also be used as a starting point in findingsuitable test methods for ethylene components.5. Sampling5.1 In general, sample ethylene product usi
12、ng PracticeF307, or a similar method. Do not take liquid ethylene samplesin order to prevent over-pressuring of sample containers andelimination of fire and explosion hazards. Static electricity candevelop when discharging excess hydrocarbon at a fairly rapid1This guide is under the jurisdiction of
13、ASTM Committee D02 on PetroleumProducts, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom-mittee D02.D0.02 on Ethylene.Current edition approved Jan. 1, 2017. Published February 2017. Originallyapproved in 1992. Last previous edition approved in 2012 as D5234 92 (2012).DOI: 10.
14、1520/D5234-92R17.2For 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 Harbo
15、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 Recommendatio
16、ns issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1rate from a sample cylinder to ambient conditions. Use agrounding system or strap.5.2 Reactive and Polar Components:5.2.1 Determination of reactive components, such as certainsulfur compounds, is generally believe
17、d to require specialsample containers, such as fluorocarbon lined cylinders, orcontainers that have been specially passivated.5.2.2 It is very difficult to obtain a valid sample fordetermination of traces of polar compounds, such as water andammonia, in the laboratory. On-line analyzers, if availabl
18、e, oradsorption of the analyte at the sample source for subsequentlab finish are believed to yield the most accurate results.6. Composition and Test Methods6.1 Table 1 indicates possible composition ranges andASTM test methods for ethylene product.6.2 Table 2 lists other test methods known or believ
19、ed to bein use7. Keywords7.1 ethylene; ethylene product concentration; ethylene testmethodsTABLE 1 Ethylene Test Methods (ASTM)ComponentConcen-trationsUnits Test MethodsEthylene 99.85 + % mass D2505Ethane 200 to 700 mg/kg D2505Methane 0.1 to 200 mg/kg D2505Propylene 0.1 to 10 mg/kg D2505Propane 0.1
20、to 5 mg/kg D2505Hydrogen 0.1 to 10 mg/kg D2504Carbon monoxide 0.1 to 5 mg/kg D2504Carbon dioxide 0.1 to 10 mg/kg D2504Acetylene 0.1 to 5 mg/kg D2505Moisture 0.1 to 5 mg/kg See Table 2Alcohols 0.1 to 5 mg/kg See Table 2Total sulfur 0.1 to 5 mg/kg D3246 or D4468Oxygen 0.1 to 3 mg/kg D2504 or O2meterNi
21、trogen 1 to 10 mg/kg D2504Ammonia 0.1 to 2 mg/kg See Table 2Hydrogen sulfide 0.1 to 1 mg/kg Online analyzerCarbonyl sulfide 0.1 to 1 mg/kg See Table 2Total oxygenates 0.1 to 10 mg/kg See Table 2NO and NO20.1 to 10 mg/kg See Table 2Benzene 0.1 to 10 mg/kg See Table 2C4s 0.1 to 10 mg/kg See Table 2Met
22、hyl acetylene 0.1 to 10 mg/kg See Table 2Propadiene 0.1 to 10 mg/kg See Table 2Chlorides 0.1 to 2 mg/kg See Table 2TABLE 2 Ethylene Test Methods (Non-ASTM)AComponents Possible Test MethodsMethane, ethane propane, pro-pylene, propadiene, methyl acet-ylene, acetyleneAn adaptation of Test Method D2505
23、isused by some labs. Others use a GC wide-bore capillary method. New technology of-fers narrow bore capillaries that separateall hydrocarbons in one analysis.H2,N2,O2, and CO An adaptation of Test Method D2504.CO2An adaptation of Test Method D2505.NO and NO2Chemiluminescence.Total sulfur Some labs u
24、se an adaptation of TestMethod D3246; others use Test MethodD4468 with an oxy-hydrogen pyrolyzer.Benzene GC methods including wide bore capillary.Moisture Obtaining a valid sample for lab analysis isextremely difficult. Instead of a lab method,an ASTM study group developed, in 1982,a standard practi
25、ce for calibrating moistureanalyzers, Practice D4178. Several types ofportable and on-line analyzers are avail-able.C4s GC methods including wide bore capillary.Ammonia Some methods in use are:Acid absorption/Nessler finish.Acid absorption/specific ion electrode.Acid absorption/IC finish.Total oxyge
26、nates GC methods.Alcohols GC methods in use. Wide bore capillaryGC methods.COS GCFPD method.Chlorides Hall conductivity detector.AThis table gives possible ethylene test methods or techniques that are believedto be in use in the industry for testing. Inclusion of any test method in this table isnot
27、to be construed as a recommendation by ASTM for its use. Some of the testmethods in this list are ASTM test methods that are specified for other products,but are being used by some labs for ethylene analysis. However, use ofASTM testmethods beyond their scope is not recommended by ASTM. Precision an
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32、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:/ 92 (2017)3
