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

• DOI: 10.1016/j.dib.2023.108892
• Publication Date: 2023-01-11T11:49:57Z
• Authors: Anton P. Semenov; Yinghua Gong; Vladimir I. Medvedev; Andrey S. Stoporev; Vladimir A. Istomin; Vladimir A. Vinok...; Tianduo Li
• Keywords: Diethylene glycol; Clathrate hydrate; Vinyl alcohol

Three-phase equilibrium conditions of vapor–aqueous solution–gas hydrate coexistence for the systems CH4–H2O–organic thermodynamic inhibitor (THI) were experimentally determined. Hydrate measurements with methanol (MeOH), monoethylene glycol (MEG), and diethylene (DEG) conducted. Five concentrations each (maximum content 50 mass%) studied in pressure range 4.9–8.4 MPa. The temperature point complete dissociation methane during constant-rate heating combined vigorous mixing fluids (600 rpm) a high-pressure vessel We compared our experimental points reliable literature data. coefficients empirical equations are derived, which accurately describe systems. effect THI concentration on suppression was analyzed. In second stage, we kinetics nucleation/growth containing polymeric KHI (0.5 mass% N-vinylpyrrolidone N-vinylcaprolactam copolymer) water or aqueous solution. For this, temperatures, pressures, subcoolings onset measured by rocking cell tests (RCS6 rig, ramp cooling at 1 K/h). Gas uptake curves characterizing crystallization polythermal regime obtained.