ASTM D7621-2014 red 1986 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 D7621-2014 red 1986 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 D7621-2014 red 1986 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(12页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D7621 13D7621 14IP 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 ca
2、se of revision, 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 the determination of the hydrogen sulfid
3、e (H2S) content of fuel oils suchas marine residual fuels and blend stocks, with viscosity up to 3000 mm2s-1 at 50C, and marine distillate fuels, as measured inthe liquid phase.NOTE 1Specification fuels falling within the scope of this test method are: ASTM Specification D396, MIL-DTL-16884, and ISO
4、 8217.1.2 ProcedureAhas been shown to eliminate interferences such as thiols (mercaptans) and alkyl sulfides. Procedure B can giveelevated results if such interferences are present (see Annex A2).1.3 Valid ranges for the precision are given in Table 2 and Table 3. Measurements can be made outside th
5、ese ranges howeverprecision has not been determined.1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the respo
6、nsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:3D396 Specification for Fuel OilsD4057 Practice for Manual Sampling of Petroleum and Petroleum Pr
7、oductsD5705 Test Method for Measurement of Hydrogen Sulfide in the Vapor Phase Above Residual Fuel OilsD6021 Test Method for Measurement of Total Hydrogen Sulfide in Residual Fuels by Multiple Headspace Extraction and SulfurSpecific DetectionD6300 Practice for Determination of Precision and Bias Dat
8、a for Use in Test Methods for Petroleum Products and Lubricants2.2 ASTM Adjuncts:4ADJ6300 D2PP Determination of Precision and Bias data for Use in Test Methods for Petroleum Products2.3 ISO Standards:5ISO 4259 Petroleum ProductsDetermination and Application of Precision Data in Relation to Methods o
9、f TestISO 8217 Fuels (Class F) Specification of Marine Fuels2.4 Energy Institute Standards:6IP 399 Test Method for Determination of Hydrogen Sulfide in Fuel OilsIP 570 Test Method for Determination of Hydrogen Sulfide in Fuel OilsRapid Liquid Phase Extraction Method1 This test method is under the ju
10、risdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricants and is the direct responsibility ofSubcommittee D02.14 on Stability and Cleanliness of Liquid Fuels.Current edition approved May 1, 2013June 1, 2014. Published August 2013July 2014. Originally approved in 2
11、010. Last previous edition approved in 20122013 asD7621 12.D7621 13. DOI:10.1520/D7621-13.DOI:10.1520/D7621-14.2 This test method has been developed through the cooperative effort between ASTM and the Energy Institute, London. The IP and ASTM logos imply that the ASTMand IP standards are technically
12、 equivalent, but their use does not imply that both standards are editorially identical.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summar
13、y page on the ASTM website.4 For referenced ASTM adjuncts contact ASTM Customer Service at serviceastm.org.5 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.6 Available from Energy Institute, 61 New Cavendish St., London,
14、 WIG 7AR, U.K., http:/www.energyinst.org.uk.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately,
15、ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive,
16、PO Box C700, West Conshohocken, PA 19428-2959. United States12.5 U.S. Department of Defense Specifications:7MIL-DTL-16884 Fuel, Naval Distillate3. Terminology3.1 Definitions:3.1.1 residual fuel oil, nfuel oil comprising a blend of viscous long, short or cracked residue from a petroleum refining proc
17、essand lighter distillates (blend stocks) blended to a fuel oil viscosity specification, burned for the generation of heat in a furnace orfirebox or for the generation of power in an engine.3.2 Definitions of Terms Specific to This Standard:3.2.1 liquid phase extraction, ntechnique to determine the
18、concentration of H2S gas trapped in a liquid by continuous analysisof gases extracted by bubbling air through the test specimen.3.2.2 vapor phase processor, napparatus enabling low temperature removal of interfering vapors.3.2.2.1 DiscussionThe vapor phase processor holds a specific filter cartridge
19、 at 20C during the Procedure A test.4. Summary of Test Method4.1 A weighed test specimen is introduced into a heated test vessel containing a diluent base oil. Air is bubbled through the oilto extract the H2S gas. The air with the extracted H2S is passed, via a vapor phase processor (ProcedureAonly)
20、, to an H2S specificelectro-chemical detector enabling the H2S content of the air to be measured and the amount in the liquid phase to be calculatedin mg/kg. The filter cartridge (see 7.4) is not required for Procedure B.5. Significance and Use5.1 Excessive levels of hydrogen sulfide in the vapor ph
21、ase above residual fuel oils in storage tanks can result in health hazards,violation of local occupational health and safety regulations, and public complaint. An additional concern is corrosion that can becaused by the presence of H2S during refining or other activities. Control measures to maintai
22、n safe levels of H2S require a precisemethod for the measurement of potentially hazardous levels of H2S in fuel oils. (WarningSafety. Hydrogen sulfide (H2S) is avery dangerous, toxic, explosive and flammable, colorless and transparent gas which can be found in crude oil and can be formedduring the m
23、anufacture of the fuel at the refinery and can be released during handling, storage, and distribution. At very lowconcentrations, the gas has the characteristic smell of rotten eggs. However, at higher concentrations, it causes a loss of smell,headaches, and dizziness, and at very high concentration
24、s, it causes instantaneous death. It is strongly recommended that personnelinvolved in the testing for hydrogen sulfide are aware of the hazards of vapor-phase H2S and have in place appropriate processesand procedures to manage the risk of exposure.)5.2 This test method was developed so refiners, fu
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