ASTM D7621-2010 4375 Standard Test Method for Determination of Hydrogen Sulfide in Fuel Oils by Rapid Liquid Phase Extraction 《快速液相抽堤法测定燃料油中的硫化氢的标准试验方法》.pdf
《ASTM D7621-2010 4375 Standard Test Method for Determination of Hydrogen Sulfide in Fuel Oils by Rapid Liquid Phase Extraction 《快速液相抽堤法测定燃料油中的硫化氢的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D7621-2010 4375 Standard Test Method for Determination of Hydrogen Sulfide in Fuel Oils by Rapid Liquid Phase Extraction 《快速液相抽堤法测定燃料油中的硫化氢的标准试验方法》.pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D7621 10IP 570Standard Test Method forDetermination of Hydrogen Sulfide in Fuel Oils by RapidLiquid Phase Extraction1, 2This standard is issued under the fixed designation D7621; the number immediately following the designation indicates the year oforiginal adoption or, in the case of r
2、evision, 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 a procedure for the determina-tion of the hydrogen sulfide (H2S) content
3、of fuel oils such asmarine residual fuels and blend stocks, in the range 0.40 to15.0 mg/kg as measured in the liquid phase.1.2 This test method is applicable for materials with aviscosity up to 3000 mm2s-1at 50C.NOTE 1ASTM specification fuels falling within the scope of this testmethod are: Specific
4、ation D396 Grade Nos 5 (light), 5 (heavy) and 6.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibilit
5、y of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3D396 Specification for Fuel OilsD4057 Practice for Manual Sampling of Petroleum andPetroleum Product
6、sD5705 Test Method for Measurement of Hydrogen Sulfidein the Vapor Phase Above Residual Fuel OilsD6021 Test Method for Measurement of Total HydrogenSulfide in Residual Fuels by Multiple Headspace Extrac-tion and Sulfur Specific DetectionD6300 Practice for Determination of Precision and BiasData for
7、Use in Test Methods for Petroleum Products andLubricants2.2 ASTM Adjuncts:4ADJ6300 D2PP Determination of Precision and Bias datafor Use in Test Methods for Petroleum Products2.3 ISO Standards:5ISO TR 13739 Petroleum ProductsProcedures for theTransfer of Bunker Fuel(s) to ShipsISO 4259 Petroleum Prod
8、uctsDetermination and Applica-tion of Precision Data in Relation to Methods of Test2.4 Energy Institute Standards:6IP 399 Test Method for Determination of Hydrogen Sulfidein Fuel OilsIP 570 Test Method for Determination of Hydrogen Sulfidein Fuel OilsRapid Liquid Phase Extraction Method3. Terminolog
9、y3.1 Definitions:3.1.1 residual fuel oil, nfuel oil comprising a blend ofviscous long, short or cracked residue from a petroleumrefining process and lighter distillates (blend stocks) blended toa fuel oil viscosity specification, burned for the generation ofheat in a furnace or firebox or for the ge
10、neration of power in anengine.3.2 Definitions of Terms Specific to This Standard:3.2.1 liquid phase extraction, ntechnique to determine theconcentration of H2S gas trapped in a liquid by continuousanalysis of gases extracted by bubbling air through the testspecimen.4. Summary of Test Method4.1 A wei
11、ghed test specimen is introduced into a heated testvessel containing a diluent base oil. Air is bubbled through theoil to extract the H2S gas. The H2S is passed, with the air, over1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct
12、responsibility of SubcommitteeD02.E0.01 on Burner Fuels.Current edition approved May 1, 2010. Published August 2010.2This test method has been developed through the cooperative effort betweenASTM and the Energy Institute, London. The IP and ASTM logos imply that theASTM and IP standards are technica
13、lly equivalent, but their use does not imply thatboth standards are editorially identical.3For 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 Sum
14、mary page onthe ASTM website.4For referenced ASTM adjuncts contact ASTM Customer Service atserviceastm.org.5Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.6Available from Energy Institute, 61 New Cavendish St., London, WI
15、G 7AR,U.K., http:/www.energyinst.org.uk.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.an H2S specific electro-chemical detector to enable the H2Scontent of the air to be measured and the amount in the liquidphase to be calculated i
16、n mg/kg.5. Significance and Use5.1 Excessive levels of hydrogen sulfide in the vapor phaseabove residual fuel oils in storage tanks can result in healthhazards, violation of local occupational health and safetyregulations, and public complaint. An additional concern iscorrosion that can be caused by
17、 the presence of H2S duringrefining or other activities. Control measures to maintain safelevels of H2S require a precise method for the measurement ofpotentially hazardous levels of H2S in fuel oils. (WarningSafety. Hydrogen sulfide (H2S) is a very dangerous, toxic,explosive and flammable, colorles
18、s and transparent gas whichcan be found in crude oil and can be formed during themanufacture of the fuel at the refinery and can be releasedduring handling, storage, and distribution. At very low concen-trations, the gas has the characteristic smell of rotten eggs.However, at higher concentrations,
19、it causes a loss of smell,headaches, and dizziness, and at very high concentrations, itcauses instantaneous death. It is strongly recommended thatpersonnel involved in the testing for hydrogen sulfide areaware of the hazards of vapor-phase H2S and have in placeappropriate processes and procedures to
20、 manage the risk ofexposure.)5.2 This test method was developed so refiners, fuel termi-nal operators, and independent testing laboratory personnel canrapidly and precisely measure the amount of H2S in residualfuel oils and distillate blend stocks, with a minimum oftraining, in a wide range of locat
21、ions.5.3 Test Method D5705 provides a simple and consistentfield test method for the rapid determination of H2Sintheresidual fuel oils vapor phase. However it does not necessarilysimulate the vapor phase H2S concentration of a fuel storagetank nor does it provide any indication of the liquid phase H
22、2Sconcentration.5.4 Test Method D6021 does measure the H2S concentra-tion of H2S in the liquid phase, however it requires a laboratoryand a skilled operator to perform the complex procedure andcalculations, and does not offer any reproducibility data. Thistest method (D7621) offers a 15 min automate
23、d test, simplicity,full precision, and a degree of portability.5.5 H2S concentrations in the liquid and vapor phase at-tempt to reach equilibrium in a static system. However, thisequilibrium and the related liquid and vapor concentrations canvary greatly depending on temperature and the chemicalcomp
24、osition of the liquid phase. The equilibrium of the vaporphase is disrupted the moment a vent or access point is openedto collect a sample.6. Apparatus6.1 GeneralThe apparatus, as detailed in Annex A1,comprises an air pump, test vessel, heating jacket, filters, H2Sspecific detector, integral compute
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