Table 4 CH4 HLVE (hydrate liquid–vapor equilibrium) data points obtained in the ultra pure water and Qatar seawater sample solutions in the presence of 5wt% ionic liquid salts and 5wt% methanol.

From: Experimentally measured methane hydrate phase equilibria and ionic liquids inhibition performance in Qatar’s seawater

Components

Ultra pure water system

Qatar sea water

T (K)

P (MPa)

T (K)

P (MPa)

CH4

287.12

11.4

285.93

12.78

285.85

9.658

284.36

11.21

283.67

7.518

282.15

9

281.14

5.763

279.74

6.59

277.24

3.87

  

CH4 + 5wt% C7H14N2O3S

287.16

11.77

285.31

11.23

285.7

9.83

283.92

9.42

283.8

7.89

281.71

7.71

281.28

5.89

280.98

6.74

278

4.1

279.57

5.72

CH4 + 5wt% C8H11N5

286.91

11.40

284.84

11.29

285.69

9.78

283.31

9.41

283.64

7.76

282.11

7.83

281.53

5.98

279.45

5.67

277.71

3.99

  

CH4 + 5wt% MeOH

283

8.86

282.93

11

282

7.96

281.92

9.48

280

6.45

280.06

7.50

278

5.26

277.90

5.73

  1. The HLVE data for 5wt% methanol in pure water system was obtained using CSMHYD61.
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