Light Hydrocarbons for Petroleum and Gas Prospecting
V.T. Jones, III, M.D. Matthews and D.M. Richers
Geochemical Remote Sensing of the Subsurface.  Edited by M.Hale
Handbook of Exploration Geochemistry, Vol. 7 (G.J.S. Govett, Editor)
©1999 Elsevier Science B.V. All rights reserved
Preprint


TABLE 5-VI

Concentrations of hydrocarbons adsorbed by different adsorbents

Tube

Length   

Hydrocarbon concentration (ppm)

Ratio to source*

Methane

Ethane

Propane

i-butane

n-butane

Pentane

Total

Activated carbon Columbia G

3 in

5

10

21

30

33

35

134

22.3

8 in

11

21

43

59

64

71

269

44.9

12 in

19

36

72

99

108

120

454

75.7

18 in

29

53

109

143

160

178

672

112.0

Molecular sieve 4A

3 in

8

40

52

3

67

73

243

40.5

8 in

12

60

80

5

100

110

367

61.2

12 in

13

67

89

6

110

130

415

69.2

18 in

14

71

93

7

129

152

466

77.7

Molecular sieve 5A-13X

3 in

8

44

62

78

82

97

371

61.9

8 in

12

67

100

120

125

122

546

91.0

12 in

15

81

127

143

149

146

661

110.2

18 in

16

83

129

151

150

153

682

113.7

Silica Gel

3 in

8

4

14

11

13

12

62

10.3

8 in

33

17

60

43

61

50

264

40.4

12 in

61

32

110

81

109

94

487

81.2

18 in

109

65

193

141

190

163

861

143.5

 

* Total adsorbed hydrocarbon concentration / hydrocarbon concentration in source gas (Karim, 1964)