The present study deals with the investigation of a unique technology – gas hydrate crystallisation. This technology is proposed as an alternative approach to natural gas purification from acid gases, particularly from CO₂. To implement the gas hydrate crystallisation technology at CO₂ recovery from natural gas we experimentally determined the gas hydrate dissociation pressures of the CH₄ (81.70 mol.%) - CO₂ (18.30 mol.%) gas mixture in THF (3.80 wt.%) aqueous solution with and without SDS (0.30 wt.%) in the temperature range of 283.71–288.00 К. It was found that the gas hydrate dissociation pressures of the mixture under consideration with and without SDS (0.30 wt.%) were in the range of 0.7570–1.9328 MPa at these conditions. The thermodynamically simulated gas hydrate dissociation pressures of the considered mixture without THF (3.80 wt.%) were 6.0828–10.179 MPa at the same temperature range. An average pressure decrease of 6.79 times was observed for the considered temperature range at the addition of THF (3.80 wt.%). According to the experimental results, the enthalpies of the gas hydrate dissociation of the CH₄ (81.70 mol.%) - CO₂ (18.30 mol.%) gas mixture in THF (3.80 wt.%) aqueous solution with and without SDS (0.30 wt.%) were calculated and were in the ranges of 20.85–33.64 and 22.04–39.81 kJ/mol, respectively.

本研究涉及一项独特技术——天然气水合物结晶的研究。该技术被提议作为从酸性气体中，特别是从 CO _{2 中}纯化天然气的替代方法。为了在从天然气中回收CO _{2 时}实施气体水合物结晶技术，我们通过实验确定了 CH ₄ (81.70 mol.%) - CO ₂的气体水合物分解压力(18.30 mol.%) 气体混合物在 THF (3.80 wt.%) 水溶液中有和没有 SDS (0.30 wt.%) 在 283.71–288.00 К 温度范围内 研究发现，在这些条件下，有和没有 SDS（0.30 wt.%）的混合物的气体水合物分解压力在 0.7570-1.9328 MPa 的范围内。在相同温度范围内，所考虑的不含 THF（3.80 wt.%）的混合物的热力学模拟气体水合物分解压力为 6.0828-10.179 MPa。对于所考虑的温度范围，在添加 THF（3.80 重量%）时观察到平均压力下降 6.79 倍。根据实验结果，CH ₄ (81.70 mol.%) - CO ₂的气体水合物分解焓 计算了含和不含 SDS（0.30 wt.%）的 THF（3.80 wt.%）水溶液中的（18.30 mol.%）气体混合物，分别在 20.85–33.64 和 22.04–39.81 kJ/mol 的范围内。