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  • ASTM
    D4891-13 Standard Test Method for Heating Value of Gases in Natural Gas and Flare Gases Range by Stoichiometric Combustion (Redline)
    Edition: 2013
    $68.89
    Unlimited Users per year

Description of ASTM-D4891 2013

ASTM D4891 - 13

Standard Test Method for Heating Value of Gases in Natural Gas and Flare Gases Range by Stoichiometric Combustion

Active Standard ASTM D4891 | Developed by Subcommittee: D03.03

Book of Standards Volume: 05.06




ASTM D4891

Significance and Use

5.1 This test method provides an accurate and reliable procedure to measure the total heating value of a fuel gas, on a continuous basis, which is used for regulatory compliance, custody transfer, and process control.

5.2 Some instruments which conform to the requirements set forth in this test method can have response times on the order of 1 min or less and can be used for on-line measurement and control.

5.3 The method is sensitive to the presence of oxygen and nonparaffin fuels. For components not listed and composition ranges that fall outside those in Table 1 and Table 2 , modifications in the method and changes to the calibration gas or gasses being used may be required to obtain correct results.

1. Scope

1.1 This test method covers the determination of the heating value of natural gases and similar gaseous mixtures within the range of composition shown in Table 1 , and Table 2 that covers flare components but is not intended to limit the components to be measured in flare gases.

TABLE 1 Natural Gas Components and Range of Composition Covered

Compound

Concentration Range, mole, %

Helium

0.01 to 5

Nitrogen

0.01 to 20

Carbon dioxide

0.01 to 10

Methane

50 to 100

Ethane

0.01 to 20

Propane

0.01 to 20

n -butane

0.01 to 10

isobutane

0.01 to 10

n -pentane

0.01 to 2

Isopentane

0.01 to 2

Hexanes and heavier

0.01 to 2


TABLE 2 Natural Gas Components and Range of Composition Covered A

Compound

CAS Number

Volatile Analytes

Acetone

67-64-1

Acetonitrile

75-05-8

Acrolein

107-05-8

Acrylonitrile

107-13-1

Benzene

71-43-2 2

1,3-Butadiene

106-99-0

Carbon disulfide

75-15-0

Chlorobenzene

108-90-7

Cumene (isopropylbenzene)

98-82-8

1,2-Dibromoethane

106-93-4

Ethylbenzene

100-41-4 2,2,4

Hexane

110-54-3

Methanol

67-56-1

Methyl isobutyl ketone

108-10-1

Methyl t-butyl ether

1634-04-4

Methylene chloride

75-09-2

Nitrobenzene

98-95-3

Nitropropane

79-46-9

Pentane2

109-66-0

Styrene

100-42-5

Tetrachloroethene

127-18-4

Toluene

108-88-3

Trichloroethene

79-01-6

Trimethylpentane

2 540-84-1

Xylenes (mixed isomers)

1330-20-7

Trimethylpentane

2 540-84-1

Xylenes (mixed isomers)

1330-20-7

Semi-volatile Analytes

Acenaphthene

83-32-9

Acenaphthylene

208-96-8

Aniline

62-53-3

Anthracene

120-12-7

Benzidine1

92-87-5

Benz[a]anthracene

56-55-3

Benzo[b]fluoranthene

205-99-2

Benzo[k]fluoranthene

207-08-9

Benzo[g,h,i]perylene

191-24-2

Benzo[a]pyrene

50-32-8

Benzo[e]pyrene2

192-97-2

Biphenyl2,

92-52-4

Cresol (mixed isomers)

1319-77-3

Chrysene

218-01-9

Dibenz[a,h]anthracene

53-70-3

Dibenzofuran

132-64-9

Dibenzo(a,e)pyrene

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