Research output: Contribution to journal › Article › peer-review
Methane hydrate nucleation on water—methane and water—decane boundaries. / Adamova, Tatiana P.; Stoporev, Andrey S.; Semenov, Anton P. et al.
In: Thermochimica Acta, Vol. 668, 10.10.2018, p. 178-184.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Methane hydrate nucleation on water—methane and water—decane boundaries
AU - Adamova, Tatiana P.
AU - Stoporev, Andrey S.
AU - Semenov, Anton P.
AU - Kidyarov, Boris I.
AU - Manakov, Andrey Yu
PY - 2018/10/10
Y1 - 2018/10/10
N2 - The nucleation of methane hydrate in water – methane and two-layer water – decane – methane systems was studied using thermal analysis under methane pressure. The nucleation processes in the systems under consideration were represented as empirical survival curves. The effect of aggregate state of guest-rich phase on the methane hydrate nucleation process was evaluated. The experiments were carried out at constant supercooling (19.7 °C). The two-step shape of experimental survival curves was observed in the both studied systems. Based on the data obtained and literature data, it was assumed that in the case of Teflon containers steady-state methane hydrate nucleation occurred at interfaces of water – methane and water – decane saturated with methane while non-isothermal nucleation with a higher rate may be caused by the presence of a small quantity of microimpurities in the initial samples or two-step mechanism of the methane hydrate nucleation process. The comparison of the observed periods of non-stationarity during which nucleation rate takes constant value and calculated nucleation rates showed that the presence of a liquid phase rich with the hydrate-forming component promotes a steadier nucleation of the methane hydrate in the quiescent reactor and facilitates the formation of clusters in the surface layer (water – decane).
AB - The nucleation of methane hydrate in water – methane and two-layer water – decane – methane systems was studied using thermal analysis under methane pressure. The nucleation processes in the systems under consideration were represented as empirical survival curves. The effect of aggregate state of guest-rich phase on the methane hydrate nucleation process was evaluated. The experiments were carried out at constant supercooling (19.7 °C). The two-step shape of experimental survival curves was observed in the both studied systems. Based on the data obtained and literature data, it was assumed that in the case of Teflon containers steady-state methane hydrate nucleation occurred at interfaces of water – methane and water – decane saturated with methane while non-isothermal nucleation with a higher rate may be caused by the presence of a small quantity of microimpurities in the initial samples or two-step mechanism of the methane hydrate nucleation process. The comparison of the observed periods of non-stationarity during which nucleation rate takes constant value and calculated nucleation rates showed that the presence of a liquid phase rich with the hydrate-forming component promotes a steadier nucleation of the methane hydrate in the quiescent reactor and facilitates the formation of clusters in the surface layer (water – decane).
KW - Decane
KW - Empirical survival curves
KW - Methane hydrate
KW - Nucleation
KW - Supercooling
KW - STATE NUCLEATION
KW - CURVES
KW - PRESSURE
KW - INHIBITION
KW - TEMPERATURES
KW - CRYSTAL-GROWTH
KW - CRYSTALLIZATION KINETICS
KW - LIQUID WATER
KW - GAS
KW - INTERFACES
UR - http://www.scopus.com/inward/record.url?scp=85053077925&partnerID=8YFLogxK
U2 - 10.1016/j.tca.2018.08.021
DO - 10.1016/j.tca.2018.08.021
M3 - Article
AN - SCOPUS:85053077925
VL - 668
SP - 178
EP - 184
JO - Thermochimica Acta
JF - Thermochimica Acta
SN - 0040-6031
ER -
ID: 16485121