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Significance and Use
5.1 A knowledge of the composition of refinery gases is useful in diagnosing the source of plant upsets, in determining the suitability of certain gas streams for use as fuel, or as feedstocks for polymerization and alkylation, and for monitoring the quality of commercial gases.
1. Scope
1.1 This test method covers the quantitative analysis of gases containing specific combinations of the following components: hydrogen; hydrocarbons with up to six carbon atoms per molecule; carbon monoxide; carbon dioxide; mercaptans with one or two carbon atoms per molecule; hydrogen sulfide; and air (nitrogen, oxygen, and argon). This test method cannot be used for the determination of constituents present in amounts less than 0.1 mole %. Dimethylbutanes are assumed absent unless specifically sought.
Note 1: Although experimental procedures described herein are uniform, calculation procedures vary with application. The following influences guide the selection of a particular calculation: qualitative mixture composition; minimum error due to components presumed absent; minimum cross interference between known components; maximum sensitivity to known components; low frequency and complexity of calibration; and type of computing machinery. Serial No. . . . . . . . . . . 7 8 9 10 11 12 13 Name or Application Commercial Commercial BB Stream Dry Gas Mixed Iso Reformer Unstabi- Component O P M O P M OC PC M O P M O P M O P M OC PC M Hydrogen ... ... ... ... ... ... ... ... ... 15 2 M ... ... ... 10 2 M 16 2 M Methane ... ... ... ... ... ... ... ... ... 14 16 M ... ... ... 9 16 M 15 16 M EthyleneE 7 26 M ... ... ... ... ... ... 12 26 M ... ... ... ... ... ... 13 26 M Ethane 6 30 M ... ... ... ... ... ... 11 30 M ... ... ... 7 30 M 12 30 M Propene 5 42 M 7 42 M 6 42 M 10 42 M ... ... ... ... ... ... 8 42 M Propane 3 44 M 4 44 M 4 44 M 7 44 M 3 44 M 5 44 M 6 44 M Butadiene ... ... ... ... ... ... 1 54 M 3 54 M ... ... ... ... ... ... 2 54 M Butene-1 1 56 M 1 56 M 7 41 M 1 ... ... ... ... ... ... ... ... 9 41 M Butene-2 1 56 M 1 56 M 8 56 M 1 56 M ... ... ... ... ... ... 10 56 M Isobutene 1F F M 1 F F 9 39 M 1 F ... 4 43 M ... ... ... 11 39 M Isobutane 4 43 M 5 43 M 5 43 M 8 43 M 1 58 M 6 43 M 7 43 M n-Butane 2 58 M 2 58 M 2 58 M 4 58 M ... ... ... 2 58 M 3 58 M Pentenes ... ... ... 6 70 M G 70 U 9 70 M ... ... ... 3 57 M ... 70 U Isopentane ... ... ... 3 57 M 3 57 M 5 57 M 2 57 M 4 72 M 4 57 M n-Pentane ... ... ... ... ... ... ... ... ... 6 72 M ... ... ... ... ... ... 5 72 M Benzene ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... H H D Hexanes ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... H H D C6 cyclic paraffins ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... H H D Hexanes ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... H H D Toluene ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... H H D Hydrogen sulfide ... ... ... ... ... ... ... ... ... I ... C ... ... ... I I C I I C Carbon dioxide ... ... ... ... ... ... ... ... ... I ... C ... ... ... I I C I I C Carbon monoxide ... ... ... ... ... ... ... ... ... 13 28 M ... ... ... 8 28 M 14 28 M Nitrogen ... ... ... ... ... ... ... ... ... ... ... ... ...
ASTM Standards D1137 Method for Analysis of Natural Gases and Related Types of Gaseous Mixtures by the Mass Spectrometer D1247 Test Method for Sampling Manufactured Gas D1265 Practice for Sampling Liquefied Petroleum (LP) Gases, Manual Method D1302 Test Method for Analysis of Carbureted Water Gas by the Mass Spectrometer Gas Producers Association Standards ICS Code ICS Number Code 71.040.40 (Chemical analysis) UNSPSC Code UNSPSC Code 15111500(Gaseous fuels) DOI: 10.1520/D2650-10R15 Citation Format ASTM D2650-10(2015), Standard Test Method for Chemical Composition of Gases by Mass Spectrometry, ASTM International, West Conshohocken, PA, 2015, www.astm.org
Because of these influences, a tabulation of calculation procedures recommended for stated applications is presented in Section 12 (Table 1).
Propane
Butane
(Cracked
Butanes)
Cracked
Fuel Gas
and Normal
Butanes
Make-Up
Gas
lized Fuel
Gas
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