Dataset for the new insights into methane hydrate inhibition with blends of vinyl lactam polymer and methanol, monoethylene glycol, or diethylene glycol as hybrid inhibitors

Dataset for the experimental study of dimethyl sulfoxide as a thermodynamic inhibitor of methane hydrate formation

“…Measurements of hydrate equilibria were performed according to the technique previously analyzed in detail [6] . The validity of this technique has been confirmed for various systems with thermodynamic inhibitors such as DMSO [ 7 , 8 ], urea [9] , methanol [ 10 , 11 ], and glycols [12] . The coordinates of the equilibrium point in each experiment were the pressure and temperature of the complete dissociation of methane hydrate under ramp heating at a slow rate of 0.1 K/h.…”

Dataset on investigating nucleation and growth kinetics of methane hydrate in aqueous methanol solutions

“…[ 3 ]). Table 1 presents all measured values of the kinetic parameters, including an additional column with the values of hydrate onset subcooling Δ T o (the difference between the temperature at the three-phase equilibrium line of methane–aqueous methanol solution–methane hydrate at pressure P o according to [ 1 , 2 ] and T o ). The mean ± standard deviation of the indicated kinetic parameters are shown in bold in the gray-filled row for each sample in Table 1 .…”

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Fig. 9 Moles of methane bound to hydrate as a function of time for sample 50 mass% MeOH in the initial growth stage during cooling (1 K/h ramp cooling until 159.7 min to 248.15 K, then constant temperature of 248.15 K because of the cooling limit of the thermostat); color symbols are experimental values for all runs, solid lines are linear fits for the initial hydrate growth stage; the first and second digits in the legend reflect the number of cooling-heating cycles and the number of cells; t = 0 corresponds to the intersection of the P-T trajectory and the V–L w –H equilibrium curve for CH 4 –MeOH–H 2 O (data from [ 1 , 2 ]).

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“…Methanol (MeOH) is the major thermodynamic inhibitor of gas hydrates and is frequently used as an anti-hydrate chemical in the oil and gas industry. The thermodynamics of gas hydrate formation in aqueous methanol solutions has been extensively studied [ 1 , 2 , [4] , [5] , [6] , [7] , [8] , [9] ]. The impact of methanol on methane hydrate nucleation and growth kinetics has not been thoroughly examined across a broad range of MeOH concentrations relevant to its use as a thermodynamic inhibitor in industry.…”

“…The hydrate onset temperatures and pressures fell within 248–282 K and 6.2–7.5 MPa, respectively. Using experimental data on the three-phase gas–aqueous solution–gas hydrate equilibrium in the methane–methanol–water system [ 1 , 2 ], the hydrate onset subcooling was calculated based on the measured hydrate onset temperature and pressure values. Data source location Gubkin University, Department of Physical and Colloid Chemistry.…”