ASTM D7621-2013 8125 Standard Test Method for Determination of Hydrogen Sulfide in Fuel Oils by Rapid Liquid Phase Extraction《采用快速液相萃取法测定燃料油中硫化氢的标准试验方法》.pdf
《ASTM D7621-2013 8125 Standard Test Method for Determination of Hydrogen Sulfide in Fuel Oils by Rapid Liquid Phase Extraction《采用快速液相萃取法测定燃料油中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 D7621-2013 8125 Standard Test Method for Determination of Hydrogen Sulfide in Fuel Oils by Rapid Liquid Phase Extraction《采用快速液相萃取法测定燃料油中硫化氢的标准试验方法》.pdf(10页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D7621 13IP 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 re
2、vision, 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. Scope*1.1 This test method covers procedures (A and B) for thedetermination of the hydrogen sulfide (H2S) c
3、ontent of fuel oilssuch as marine residual fuels and blend stocks, with viscosityup to 3000 mm2s-1at 50C, and marine distillate fuels, asmeasured in the liquid phase.NOTE 1Specification fuels falling within the scope of this test methodare: ASTM Specification D396, MIL-DTL-16884, and ISO 8217.1.2 Pr
4、ocedure A has been shown to eliminate interferencessuch as thiols (mercaptans) and alkyl sulfides. Procedure B cangive elevated results if such interferences are present (seeAnnex A2).1.3 Valid ranges for the precision are given in Table 2 andTable 3. Measurements can be made outside these rangeshow
5、ever precision has not been determined.1.4 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the
6、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 ProductsD5705 Te
7、st 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 Use in Te
8、st 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 4259 Petroleum ProductsDetermination and Applica-tion of Precision Data in Relation to Methods of TestISO 8217 F
9、uels (Class F) Specification of Marine Fuels2.4 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 Method2.5 U.S. Department of Defense Specifications:7MIL-D
10、TL-16884 Fuel, Naval Distillate3. Terminology3.1 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 to1This test method is under the jurisdiction of ASTM Committee
11、D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.14 on Stability and Cleanliness of Liquid Fuels.Current edition approved May 1, 2013. Published August 2013. Originallyapproved in 2010. Last previous edition approved in 2012 as D7621 12.DOI:10.1520/D7621-13
12、.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 technically equivalent, but their use does not imply thatboth standards are editorially identical.3For referenced ASTM stan
13、dards, 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.4For referenced ASTM adjuncts contact ASTM Customer Service atserviceastm.org.5Availab
14、le 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, WIG 7AR,U.K., http:/www.energyinst.org.uk.7Available online at https:/assist.dla.mil/quicksearch/ or http:/ from the
15、Standardization Document Order Desk, 700 Robbins Avenue, Building4D, Philadelphia, PA 19111-5094.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1a fuel oil viscosity spe
16、cification, burned for the generation ofheat in a furnace or firebox or for the generation 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 ext
17、racted by bubbling air through the testspecimen.3.2.2 vapor phase processor, napparatus enabling lowtemperature removal of interfering vapors.3.2.2.1 DiscussionThe vapor phase processor holds aspecific filter cartridge at 20C during the Procedure A test.4. Summary of Test Method4.1 A weighed test sp
18、ecimen is introduced into a heated testvessel containing a diluent base oil. Air is bubbled through theoil to extract the H2S gas. The air with the extracted H2Sispassed, via a vapor phase processor (Procedure A only), to anH2S specific electro-chemical detector enabling the H2S con-tent of the air
19、to be measured and the amount in the liquidphase to be calculated in mg/kg. The filter cartridge (see 7.4)isnot required for Procedure B.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
20、of local occupational health and safetyregulations, and public complaint. An additional concern iscorrosion that can be caused by the presence of H2S duringrefining or other activities. Control measures to maintain safelevels of H2S require a precise method for the measurement ofpotentially hazardou
21、s levels of H2S in fuel oils. (WarningSafety. Hydrogen sulfide (H2S) is a very dangerous, toxic,explosive and flammable, colorless 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 d
22、istribution. At very lowconcentrations, the gas has the characteristic smell of rotteneggs. However, at higher concentrations, it causes a loss ofsmell, headaches, and dizziness, and at very highconcentrations, it causes instantaneous death. It is stronglyrecommended that personnel involved in the t
23、esting for hydro-gen sulfide are aware of the hazards of vapor-phase H2S andhave in place appropriate processes and procedures to managethe risk of exposure.)5.2 This test method was developed so refiners, fuel termi-nal operators, and independent testing laboratory personnel canrapidly and precisel
24、y measure the amount of H2S in residualfuel oils and distillate blend stocks, with a minimum oftraining, in a wide range of locations.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 nec
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