Table 2 Gas yields (mmol/g oil) and 34S isotopic ratios of H2S in hydrothermal experiments involving S0, MgSO4 and CaSO4·2H2O.

From: Diamondoids and thiadiamondoids generated from hydrothermal pyrolysis of crude oil and TSR experiments

Temperature (℃)

Time (h)

EasyRo (%)

MgSO4/CaSO4·2H2O (mmol/g oil)

S0

H2S

CO2

H2S/S0

δ34SH2S (‰)

Group1#: Non-isothermal pyrolysis of ZS1-L oil involving S0 and MgSO4 under constant rate of 20℃/h

336

 

0.57

13.93

13.68

9.66

0.38

0.71

 − 5.00

360

 

0.68

13.45

12.85

9.42

0.47

0.73

 − 4.87

384

 

0.79

13.47

12.85

9.49

0.44

0.74

 − 4.93

408

 

0.96

13.52

12.47

10.57

0.54

0.85

 − 3.96

432

 

1.19

13.45

12.91

11.04

0.63

0.86

 − 3.68

456*

 

1.47

–

–

–

0.51

–

–

456

 

1.47

13.64

12.24

11.36

0.84

0.93

 

480

 

1.81

13.05

12.92

12.28

1.07

0.95

 − 3.05

504

 

2.19

11.41

11.59

15.12

1.15

1.31

 − 2.74

528

 

2.62

12.86

12.79

17.43

1.70

1.36

–

552

 

3.06

13.84

13.00

16.96

1.93

1.30

 − 2.97

576

 

3.5

13.35

12.18

15.58

1.99

1.28

 − 2.49

600

 

3.87

13.41

13.11

14.62

2.14

1.12

 − 2.45

Group2#: Isothermal pyrolysis of ZS1-L oil involving S0 and CaSO4·2HO at 360℃ for 48–840 h2

360*

432

1.54

–

–

–

1.23

–

–

360

48

1.13

13.55

13.09

11.46

1.71

0.88

–

360

96

1.25

13.79

12.38

10.53

1.75

0.93

–

360

144

1.32

13.70

13.45

11.47

1.75

0.85

 − 5.97

360

192

1.38

13.33

12.39

8.92

1.74

0.78

 − 6.20

360

288

1.46

13.75

13.74

9.48

1.99

0.69

 − 5.78

360

432

1.54

13.79

13.36

10.26

2.21

0.71

 − 6.28

360

648

1.63

13.70

13.25

9.25

2.21

0.65

 − 6.79

360

840

1.69

13.63

14.18

11.14

2.49

0.73

 − 6.79

  1. –Indicates not detected; *The blank experiments.
Back to article page