Wang Sunan, Chen Litao, Guo Lei, Luo Jiansheng, Ren Liangliang, Xiang Xiong, Geng Tie, Yu Changhong, Meng Zilong
Oilfield Chemical Division, China Oilfield Services Limited, Sanhe, Langfang 065201, China.
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China.
Molecules. 2025 Jan 14;30(2):308. doi: 10.3390/molecules30020308.
The hydrate blockage avoidance performance of two anti-agglomerants (coconut amidopropyl dimethylamine, propylene bis (octadecylamidopropyl dimethylammonium chloride)) and their mixtures with polyvinylpyrrolidone (PVP) was tested in a high-pressure rocking cell apparatus. The effect of gas-liquid ratio, water content and PVP concentration were analyzed. A method for evaluating the kinetic inhibiting and anti-agglomerating performance of hydrate inhibitors was established. It was found that coconut amidopropyl dimethylamine had good anti-agglomerating performance at a low gas-liquid ratio (0.5) and various water content levels (20~80%), while propylene bis (octadecylamidopropyl dimethylammonium chloride) had a good anti-agglomerating performance only at a low gas-liquid ratio (0.5) and high water content (80%), and the hydrate volume fraction was up to 23.27% for good anti-agglomeration. When PVP was mixed with the above two anti-agglomerants, it was found that coconut amidopropyl dimethylamine could significantly reduce the kinetic inhibition performance of PVP, while propylene bis (octadecylamidopropyl dimethylammonium chloride) had no significant effect on the kinetic inhibition performance of PVP. The maximum subcooling was 4.4 °C. PVP had no significant effect on the anti-agglomerating performance of the two anti-agglomerants, and the maximum hydrate volume fraction was 18.87% when the agglomeration was well inhibited.
在高压摇摆釜装置中测试了两种抗聚剂（椰油酰胺丙基二甲基胺、双十八烷基酰胺丙基二甲基氯化铵）及其与聚乙烯吡咯烷酮（PVP）混合物的水合物堵塞避免性能。分析了气液比、含水量和PVP浓度的影响。建立了一种评估水合物抑制剂动力学抑制和抗聚性能的方法。结果发现，椰油酰胺丙基二甲基胺在低气液比（0.5）和各种含水量水平（20%~80%）下具有良好的抗聚性能，而双十八烷基酰胺丙基二甲基氯化铵仅在低气液比（0.5）和高含水量（80%）下具有良好的抗聚性能，且水合物体积分数高达23.27%时抗聚效果良好。当PVP与上述两种抗聚剂混合时，发现椰油酰胺丙基二甲基胺会显著降低PVP的动力学抑制性能，而双十八烷基酰胺丙基二甲基氯化铵对PVP的动力学抑制性能没有显著影响。最大过冷度为4.4℃。PVP对两种抗聚剂的抗聚性能没有显著影响，且团聚抑制良好时最大水合物体积分数为18.87%。
