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

Article Engineering, Chemical

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

Anton P. Semenov et al.

Summary: Gas hydrate inhibition is an important topic in flow assurance. The hybrid inhibition strategy involving kinetic hydrate inhibitors (KHIs) and thermodynamic hydrate inhibitors (THIs) has been developed through extensive experimental studies. Methane hydrate equilibrium conditions were determined for aqueous solutions of methanol, MEG, and DEG (<50 mass%). The kinetics of methane hydrate nucleation and growth were studied for aqueous solutions of commercial vinyl lactam KHI and its blends with alcohols. A blend of KHI and MEG is optimal for hybrid inhibition, showing enhanced delay of gas uptake and reduced rate of methane hydrate growth.

CHEMICAL ENGINEERING SCIENCE (2023)

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Article Energy & Fuels

Analysis of the Techniques for Measuring the Equilibrium Conditions of Gas Hydrates Formation

A. P. Semenov et al.

Summary: This study analyzed the factors influencing the determination of gas hydrates phase equilibria conditions using stepwise heating and constant-rate heating procedures. The results showed that using the GHA350 autoclave can provide more reliable results compared to the RCS6 rocking cells. The stepwise heating method is more reliable but time-consuming, while the constant-rate heating method can significantly reduce the measurement time. The choice of heating rate should be consistent with the mixing efficiency and other factors. For most systems, the results of both methods are consistent within the experimental error limits, except for gas hydrates in concentrated salt solutions with high viscosity at low temperatures.

CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS (2022)

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Article Engineering, Environmental

The pursuit of a more powerful thermodynamic hydrate inhibitor than methanol. Dimethyl sulfoxide as a case study

Anton P. Semenov et al.

Summary: The study demonstrates that DMSO is a thermodynamic hydrate inhibitor, with a linear correlation between its mass fraction in solution and gas pressure. Compared to methanol, DMSO exhibits more effective anti-hydrate activity due to the higher non-ideality of its aqueous solutions.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Energy & Fuels