聚乙烯己內(nèi)酰胺類水合物抑制劑開發(fā)及綜合評價
發(fā)布時間：2018-08-27 18:55
【摘要】：天然氣水合物引起的管線堵塞問題長期困擾著油氣的生產(chǎn)和輸送,添加抑制劑是解決水合物堵塞最有效的方法。組合抑制劑能克服單一抑制劑的不足,更好應對特殊工況,成為抑制劑開發(fā)的焦點。本文以乙烯基己內(nèi)酰胺為單體,二甘醇丁醚為溶劑,合成了一系列引發(fā)劑用量不同的抑制劑HYs。利用紅外光譜、凝膠滲透色譜、粘度計對產(chǎn)品結構進行表征。結果表明,產(chǎn)品分子量受引發(fā)劑用量的影響,產(chǎn)品分子量(23419~34866)及特性粘度(0.55856L·g-1~0.75503 L·g-1)隨著其引發(fā)劑用量(0.1%~0.4%)增大而增大。利用自主搭建的水合物抑制劑評價裝置分別采用快速降溫法及恒溫法比較了HYs系列抑制劑對THF水合物作用效果。表明結果,引發(fā)劑用量為0.1%的HY 121在所測抑制劑中抑制效果最好,而HY 122、HY 123、HY 124(引發(fā)劑用量依次增加)的抑制性能依次減弱;HY 121對THF水合物的抑制效果遠遠優(yōu)于PVCap(HY 121中除去二甘醇丁醚),前者在-5℃時的誘導時間為289min,后者為67min,表明二甘醇丁醚對聚乙烯基己內(nèi)酰胺(PVCap)具有增效作用。利用均勻設計法分別研究了HY 121與甲醇(MA)、乙醇(ET)和乙二醇(EG)組成的復合抑制劑的抑制效果,得到三種抑制劑含量與誘導時間的關系式,可知HY 121的濃度對誘導時間影響更顯著。對比HY 121與甲醇、乙醇和乙二醇組合抑制劑的效果可知,抑制性能最好的為甲醇復配體系,其次是乙二醇體系,乙醇體系最差。但當抑制效果相當,利用ICI公司環(huán)境負荷分析法及模糊綜合評判法,可得三種抑制劑對環(huán)境負荷影響大小為乙二醇甲醇乙醇。研究HY 121與商業(yè)抑制劑HY1、Inhibex 501對模擬真實氣水合物抑制性能。結果顯示,HY 121表現(xiàn)出最佳的抑制效果,測試壓力為4.0MPa左右時,模擬氣水合物平均誘導時間為78.3h,而Inhibex 501為53.15h;當實驗壓力在6.0MPa下,HY 121的平均誘導時間為62.55h,而Inhibex 501為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，
本文編號：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，
本文編號：2208138
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