Investigation on equilibrium conditions of natural gas hydrates with low-dosage hydrate inhibitors (LDHIs) aqueous solutions is helpful for the development of LDHIs. In this work, experimental studies on the equilibrium conditions for methane hydrate formation were carried out with different concentrations of N-vinylcaprolactam- N-vinylpyrrolidone copolymer in 2-butoxyethanol (Inhibex501) under temperature range of 283.6 ~ 290.9 K and pressure range of 7.51 MPa ~ 15.97 MPa. Results showed that the formation of methane hydrate was promoted by Inhibex501 with concentration of 0.5wt% and 2.0wt%. The thermodynamic conditions of the formation was nearly unchanged with 2-butoxyethanol concentrations of 0.2wt% ~ 1.0wt%. The N-vinylcaprolactam- N-vinylpyrrolidone copolymer, as the main component of Inhibex501, played a leading role in the change of equilibrium condition of methane hydrates.
TANG Cui-Ping
,
DAI Xing-Xue
,
LIANG De-Qing
,
LI Dong-Liang
. Equilibrium Conditions for Methane Hydrate in the Presence of Low-Dosage Hydrate Inhibitors Aqueous Solutions[J]. Advances in New and Renewable Energy, 2018
, 6(1)
: 42
-46
.
DOI: 10.3969/j.issn.2095-560X.2018.01.007
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