1 |
high-pressure
cell |
CH4
|
diesel oil |
285 mL |
30 |
antiagglomerant |
0 |
1.2 |
4 |
Different
water cuts were studied (30, 60, and 90%) with and without the AA.
They found that AA helped to increase the induction time by 25 min. |
(6) |
285 mL |
30 |
0 |
2 |
4.5 |
285 mL |
30 |
0.5 |
2 |
4 |
285 mL |
30 |
1 |
2 |
4 |
570 mL |
60 |
0 |
1.2 |
4 |
570 mL |
60 |
0 |
2 |
4 |
570 mL |
60 |
0.5 |
2 |
4.5 |
855 mL |
90 |
0 |
1.2 |
4 |
855 mL |
90 |
0 |
2 |
4.5 |
855 mL |
90 |
0.5 |
2 |
4 |
855 mL |
90 |
1 |
2 |
4 |
2 |
rocking cell
apparatus |
CH4
|
crude oil |
0 |
100 pure water |
no
KHI |
0 |
0.1 |
1 |
Starch, chitosan,
glycine, PVP, and mSA-RmAFP1 are the inhibitors in order. It has been
discovered that mSA- RmAFP1 can reduce the rate of generation of SNG
hydrates. |
(89) |
0 |
100 brine water 3.5 wt % |
no KHI |
0 |
0.1 |
1 |
0 |
100 pure water |
mSA-RmAFP1 |
2.25 |
0.1 |
1 |
0 |
100 pure water |
chitosan |
2.25 |
0.1 |
1 |
0 |
100 pure water |
starch |
2.25 |
0.1 |
|
0 |
100 pure water |
PVP |
2.25 |
0.1 |
1 |
0 |
100 pure water |
glycine |
2.25 |
0.1 |
1 |
0 |
100 pure water |
mSA-RmAFP1 |
2.25 |
0.1 |
1 |
0 |
100 brine water 3.5 wt % |
chitosan |
2.25 |
0.1 |
1 |
0 |
100 brine water 3.5 wt % |
starch |
2.25 |
0.1 |
1 |
0 |
100 brine water 3.5 wt % |
PVP |
2.25 |
0.1 |
1 |
0 |
100 brine water 3.5 wt % |
glycine |
2.25 |
0.1 |
1 |
15% |
85 |
no KHI |
0 |
0.1 |
1 |
15% |
85 |
mSA-RmAFP1 |
2.25 |
0.1 |
1 |
15% |
85 |
chitosan |
2.25 |
0.1 |
1 |
15% |
85 |
starch |
2.25 |
0.1 |
1 |
15% |
85 |
PVP |
2.25 |
0.1 |
1 |
15% |
85 |
glycine |
2.25 |
0.1 |
1 |
3 |
high-pressure
sapphire autoclave |
CH4
|
paraffin oil |
89% |
11 |
antiagglomerant |
2 |
3.17 |
5.78 |
In the autoclave,
hydrate particles formed a moving bed, which was followed by full
dispersion of water and oil, rapid hydrate growth, and deposition
on the wall. |
(36) |
89% |
11 |
1.9 |
5.77 |
89% |
11 |
5.9 |
5.88 |
89% |
11 |
5.7 |
5.89 |
78% |
22 |
6.3 |
5.99 |
78% |
22 |
6.3 |
5.99 |
78% |
22 |
4.9 |
5.94 |
78% |
22 |
6.8 |
6.01 |
70% |
30 |
1.9 |
5.83 |
70% |
30 |
2.9 |
5.86 |
70% |
30 |
2.7 |
5.86 |
70% |
30 |
4.8 |
5.91 |
50% |
50 |
1.2 |
5.73 |
50% |
50 |
1.3 |
5.72 |
50% |
50 |
6.4 |
5.91 |
50% |
50 |
6.9 |
5.92 |
30% |
70 |
1.2 |
5.66 |
30% |
70 |
4.8 |
5.81 |
30% |
70 |
3.3 |
5.76 |
30% |
70 |
5.3 |
5.83 |
4 |
high-pressure
sapphire autoclave |
CH4
|
conroe oil |
95% |
5 |
NA |
NA |
4 |
3.98 |
The mass transfer
of methane through hydrate shells appears to control hydrate formation
in these water-in-oil dispersions. |
(45) |
65% |
35 |
NA |
NA |
65% |
35 |
NA |
NA |
65% |
35 |
NA |
NA |
65% |
35 |
NA |
NA |
5 |
stirring autoclave |
CH4
|
diesel oil |
209 mL |
5 |
rhamnolipid |
3 |
6 |
5.50 |
When Span
20, rhamnolipid, and compounding AAs were added in water/diesel oil
systems, water cut affected not only the amount of dissociated methane
hydrate but also the maximum dissociation rate of methane hydrate. |
(23) |
198 mL |
10 |
3 |
176 mL |
20 |
3 |
198 mL |
10 |
1 |
198 mL |
10 |
0.5 |
198 mL |
10 |
0 |
209 mL |
5 |
Span 20 |
0.1 |
198 mL |
10 |
0.1 |
209 mL |
5 |
0.5 |
198 mL |
10 |
0.5 |
198 mL |
10 |
2.0 |
209 mL |
5 |
Span 20:esters
polymer |
3.0 |
198 mL |
10 |
3.0 |
209 mL |
5 |
1:02 |
198 mL |
10 |
1:02 |
176 mL |
20 |
1:02 |
154 mL |
30 |
1:02 |
6 |
high-pressure
sapphire autoclave |
CH4
|
diesel oil |
95 mL |
5 |
antiagglomerant |
3 |
4 |
0.2 |
The solubility
of natural gas in an emulsion system grows practically linearly with
pressure, while it decreases with water cut. There is an initial slow
hydrate formation stage for systems with water cuts of 5, 10, and
15% vol, whereas rapid hydrate formation occurs and the process of
the gas–liquid dissolving equilibrium does not appear in the
pressure curve at 20 and 25 vol %. |
(87) |
0.4 |
0.8 |
1.2 |
90 mL |
10 |
0.2 |
0.5 |
0.8 |
1.2 |
1.35 |
85 mL |
15 |
0.5 |
0.8 |
1 |
1.2 |
1.35 |
80 mL |
20 |
0.3 |
0.6 |
0.9 |
1.2 |
1.35 |
75 mL |
25 |
0.2 |
0.4 |
0.8 |
7 |
high-pressure
sapphire autoclave |
CH4
|
diesel oil |
481 mL |
10 |
lubrizol |
0 |
3 |
6.5 |
High water
cuts with or without surfactants had a lower dissociation ratio (25%)
than lower water cuts, resulting in enhanced self-preservation effects. |
(10) |
428 mL |
20 |
0 |
374 mL |
30 |
0 |
428 mL |
20 |
0.06 |
428 mL |
20 |
TBAB |
0.06 |
428 mL |
20 |
0 |
0 |
100 |
0 |
530 mL |
99 |
0 |
507 mL |
95 |
0 |
530 mL |
99 |
TBAB |
0.06 |
530 mL |
99 |
lubrizol |
0.06 |
0 |
100 |
TBAB |
0.06 |
0 |
100 |
lubrizol |
0.06 |
8 |
high-pressure
sapphire autoclave |
CH4
|
diesel oil |
300 mL |
up to 30 |
Span20 with
different promoters (SDS,L-1,TBAB) |
0 |
3 |
7 |
SDS/L-l had
a greater effect on increasing hydrate growth, which could significantly
increase the kinetics of methane hydrate formation in the emulsion
system, whereas Tween80 and TBAB prevented methane hydrate formation
in the emulsion to some amount. |
(94) |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
1 |
0.5 |
0.25 |
0.1 |
1 |
0.5 |
0.25 |
0.1 |
0.5 |
0.5 |
6.5 |
0.5 |
6 |
0.5 |
5.5 |
0.5 |
7 |
0.5 |
6.5 |
0.5 |
6 |
0.5 |
5.5 |
9 |
stainless steel
(SS-316) cell |
CH4
|
mineral oil |
|
40 |
PVP |
2 |
4 |
8 |
In comparison
to PVP, MEG is a better choice. l-Tyrosine is not a good
choice in terms of hydrate formation induction time. |
(95) |
MEG |
20 |
7 |
10 |
high-pressure
hydrate reaction system |
CH4
|
light oil and
asphaltene |
4 mL |
90 |
PVP (K-15) |
2000 ppm |
2 |
5 |
Results demonstrated
that light oil components mainly promote hydrate growth at the initial
stage because of the enhanced methane solubility in the oil phase
and the slight emulsification effect under mechanical stirring. |
(91) |
luvicap EG |
inhibex 501 |
11 |
autoclave |
CH4
|
seabed oil |
10 mL |
(20–50) and (60–100) |
antiagglomerant |
0.2 and 0.5 |
20 to 1 |
14 |
AA is less toxic than QAs.
The T surfactant used in this study has the ability to reduce the
risk of hydrate obstruction in offshore gas flowlines as well as capture
oil from deep water spills. |
(88) |