聚乙烯己内酰胺类水合物抑制剂开发及综合评价
发布时间：2018-08-27 18:55
【摘要】：天然气水合物引起的管线堵塞问题长期困扰着油气的生产和输送,添加抑制剂是解决水合物堵塞最有效的方法。组合抑制剂能克服单一抑制剂的不足,更好应对特殊工况,成为抑制剂开发的焦点。本文以乙烯基己内酰胺为单体,二甘醇丁醚为溶剂,合成了一系列引发剂用量不同的抑制剂HYs。利用红外光谱、凝胶渗透色谱、粘度计对产品结构进行表征。结果表明,产品分子量受引发剂用量的影响,产品分子量(23419~34866)及特性粘度(0.55856L·g-1~0.75503 L·g-1)随着其引发剂用量(0.1%~0.4%)增大而增大。利用自主搭建的水合物抑制剂评价装置分别采用快速降温法及恒温法比较了HYs系列抑制剂对THF水合物作用效果。表明结果,引发剂用量为0.1%的HY 121在所测抑制剂中抑制效果最好,而HY 122、HY 123、HY 124(引发剂用量依次增加)的抑制性能依次减弱;HY 121对THF水合物的抑制效果远远优于PVCap(HY 121中除去二甘醇丁醚),前者在-5℃时的诱导时间为289min,后者为67min,表明二甘醇丁醚对聚乙烯基己内酰胺(PVCap)具有增效作用。利用均匀设计法分别研究了HY 121与甲醇(MA)、乙醇(ET)和乙二醇(EG)组成的复合抑制剂的抑制效果,得到三种抑制剂含量与诱导时间的关系式,可知HY 121的浓度对诱导时间影响更显著。对比HY 121与甲醇、乙醇和乙二醇组合抑制剂的效果可知,抑制性能最好的为甲醇复配体系,其次是乙二醇体系,乙醇体系最差。但当抑制效果相当,利用ICI公司环境负荷分析法及模糊综合评判法,可得三种抑制剂对环境负荷影响大小为乙二醇甲醇乙醇。研究HY 121与商业抑制剂HY1、Inhibex 501对模拟真实气水合物抑制性能。结果显示,HY 121表现出最佳的抑制效果,测试压力为4.0MPa左右时,模拟气水合物平均诱导时间为78.3h,而Inhibex 501为53.15h;当实验压力在6.0MPa下,HY 121的平均诱导时间为62.55h,而Inhibex 501为52.0h。
[Abstract]:The pipeline blockage caused by natural gas hydrate has long puzzled the production and transportation of oil and gas. Adding inhibitors is the most effective method to solve the gas hydrate blockage. The combination of inhibitors can overcome the shortcomings of single inhibitor, better deal with the special conditions, and become the focus of inhibitor development. In this paper, a series of inhibitors HYs. with different dosage of initiator were synthesized with vinyl caprolactam as monomer and diethylene glycol butyl ether as solvent. The structure of the product was characterized by IR, gel permeation chromatography and viscometer. The results show that the molecular weight of the product is affected by the amount of initiator, and the molecular weight (23419 / 34866) and intrinsic viscosity (0.55856L / g ~ (-1) 0.75503L / g ~ (-1) increase with the increase of initiator dosage (0.1%). The effects of HYs series inhibitors on THF hydrates were compared by using the fast cooling method and the constant temperature method. The results showed that HY 121 with 0.1% initiator had the best inhibitory effect among the inhibitors tested. The inhibitory effect of HY 122 HY 123 HY124 (increasing the amount of initiator in turn) on the inhibition of THF hydrate was significantly better than that of removing diethylene glycol butoxide from PVCap (HY 121. The induction time of the former was 289 min at -5 鈩，
本文编号：2208138
[Abstract]:The pipeline blockage caused by natural gas hydrate has long puzzled the production and transportation of oil and gas. Adding inhibitors is the most effective method to solve the gas hydrate blockage. The combination of inhibitors can overcome the shortcomings of single inhibitor, better deal with the special conditions, and become the focus of inhibitor development. In this paper, a series of inhibitors HYs. with different dosage of initiator were synthesized with vinyl caprolactam as monomer and diethylene glycol butyl ether as solvent. The structure of the product was characterized by IR, gel permeation chromatography and viscometer. The results show that the molecular weight of the product is affected by the amount of initiator, and the molecular weight (23419 / 34866) and intrinsic viscosity (0.55856L / g ~ (-1) 0.75503L / g ~ (-1) increase with the increase of initiator dosage (0.1%). The effects of HYs series inhibitors on THF hydrates were compared by using the fast cooling method and the constant temperature method. The results showed that HY 121 with 0.1% initiator had the best inhibitory effect among the inhibitors tested. The inhibitory effect of HY 122 HY 123 HY124 (increasing the amount of initiator in turn) on the inhibition of THF hydrate was significantly better than that of removing diethylene glycol butoxide from PVCap (HY 121. The induction time of the former was 289 min at -5 鈩，
本文编号：2208138
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