Semenov Anton P, Gong Yinghua, Medvedev Vladimir I, Stoporev Andrey S, Istomin Vladimir A, Vinokurov Vladimir A, Li Tianduo
Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Department of Physical and Colloid Chemistry, Gubkin University, 65, Leninsky prospekt, Building 1, Moscow 119991, Russian Federation.
Data Brief. 2023 Jan 11;46:108892. doi: 10.1016/j.dib.2023.108892. eCollection 2023 Feb.
Three-phase equilibrium conditions of vapor-aqueous solution-gas hydrate coexistence for the systems of CH-HO-organic thermodynamic inhibitor (THI) were experimentally determined. Hydrate equilibrium measurements for systems with methanol (MeOH), monoethylene glycol (MEG), and diethylene glycol (DEG) were conducted. Five concentrations of each inhibitor (maximum content 50 mass%) were studied in the pressure range of 4.9-8.4 MPa. The equilibrium temperature and pressure in the point of complete dissociation of methane hydrate during constant-rate heating combined with vigorous mixing of fluids (600 rpm) in a high-pressure vessel were determined. We compared our experimental points with reliable literature data. The coefficients of empirical equations are derived, which accurately describe hydrate equilibrium conditions for the studied systems. The effect of THI concentration and pressure on methane hydrate equilibrium temperature suppression was analyzed. In the second stage, we studied the kinetics of methane hydrate nucleation/growth in systems containing a polymeric KHI (0.5 mass% of N-vinylpyrrolidone and N-vinylcaprolactam copolymer) in water or THI aqueous solution. For this, temperatures, pressures, and subcoolings of methane hydrate onset were measured by rocking cell tests (RCS6 rig, ramp cooling at 1 K/h). Gas uptake curves characterizing the methane hydrate crystallization kinetics in the polythermal regime were obtained.
实验测定了CH₄-H₂O-有机热力学抑制剂（THI）体系中气相-水溶液-气体水合物共存的三相平衡条件。对含有甲醇（MeOH）、单乙二醇（MEG）和二乙二醇（DEG）的体系进行了水合物平衡测量。在4.9-8.4MPa的压力范围内，研究了每种抑制剂的五种浓度（最大含量50质量%）。通过在高压容器中恒速加热并剧烈混合流体（600转/分钟），测定了甲烷水合物完全解离点的平衡温度和压力。我们将实验点与可靠的文献数据进行了比较。推导了经验方程的系数，该方程准确描述了所研究体系的水合物平衡条件。分析了THI浓度和压力对甲烷水合物平衡温度抑制的影响。在第二阶段，我们研究了在水或THI水溶液中含有聚合物动力学抑制剂（0.5质量%的N-乙烯基吡咯烷酮和N-乙烯基己内酰胺共聚物）的体系中甲烷水合物成核/生长的动力学。为此，通过摇摆细胞试验（RCS6装置，以1K/h的速率降温）测量了甲烷水合物开始形成时的温度、压力和过冷度。获得了表征多热状态下甲烷水合物结晶动力学的气体吸收曲线。
