Impact of water film thickness on kinetic rate of mixed hydrate formation during injection of CO^sub 2^ into CH^sub 4^ hydrate
In this work, nonequilibrium thermodynamics and phase field theory (PFT) has been applied to study the kinetics of phase transitions associated with CO... injection into systems containing CH... hydrate, free CH... gas, and varying amounts of liquid water. The CH... hydrate was converted into either...
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| Veröffentlicht in: | AIChE journal 2015-11, Vol.61 (11), p.3944 |
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| creator | Baig, Khuram Kvamme, Bjørn Kuznetsova, Tatiana Bauman, Jordan |
| description | In this work, nonequilibrium thermodynamics and phase field theory (PFT) has been applied to study the kinetics of phase transitions associated with CO... injection into systems containing CH... hydrate, free CH... gas, and varying amounts of liquid water. The CH... hydrate was converted into either pure CO... or mixed CO...-CH... hydrate to investigate the impact of two primary mechanisms governing the relevant phase transitions: solid-state mass transport through hydrate and heat transfer away from the newly formed CO... hydrate. Experimentally proven dependence of kinetic conversion rate on the amount of available free pore water was investigated and successfully reproduced in our model systems. It was found that rate of conversion was directly proportional to the amount of liquid water initially surrounding the hydrate. When all of the liquid has been converted into either CO... or mixed CO...-CH... hydrate, a much slower solid-state mass transport becomes the dominant mechanism. (ProQuest: ... denotes formulae/symbols omitted.) |
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The CH... hydrate was converted into either pure CO... or mixed CO...-CH... hydrate to investigate the impact of two primary mechanisms governing the relevant phase transitions: solid-state mass transport through hydrate and heat transfer away from the newly formed CO... hydrate. Experimentally proven dependence of kinetic conversion rate on the amount of available free pore water was investigated and successfully reproduced in our model systems. It was found that rate of conversion was directly proportional to the amount of liquid water initially surrounding the hydrate. When all of the liquid has been converted into either CO... or mixed CO...-CH... hydrate, a much slower solid-state mass transport becomes the dominant mechanism. 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The CH... hydrate was converted into either pure CO... or mixed CO...-CH... hydrate to investigate the impact of two primary mechanisms governing the relevant phase transitions: solid-state mass transport through hydrate and heat transfer away from the newly formed CO... hydrate. Experimentally proven dependence of kinetic conversion rate on the amount of available free pore water was investigated and successfully reproduced in our model systems. It was found that rate of conversion was directly proportional to the amount of liquid water initially surrounding the hydrate. When all of the liquid has been converted into either CO... or mixed CO...-CH... hydrate, a much slower solid-state mass transport becomes the dominant mechanism. (ProQuest: ... denotes formulae/symbols omitted.)</abstract><cop>New York</cop><pub>American Institute of Chemical Engineers</pub></addata></record> |
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| ispartof | AIChE journal, 2015-11, Vol.61 (11), p.3944 |
| issn | 0001-1541 1547-5905 |
| language | eng |
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| source | Wiley Journals |
| subjects | Heat transfer Impact analysis Kinetics Phase transitions Thermodynamics Water |
| title | Impact of water film thickness on kinetic rate of mixed hydrate formation during injection of CO^sub 2^ into CH^sub 4^ hydrate |
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