工业水处理 ›› 2023, Vol. 43 ›› Issue (10): 157-162. doi: 10.19965/j.cnki.iwt.2022-1078

• 试验研究 • 上一篇    下一篇

水合物抑制剂聚N-甲氧基-N-甲基丙烯酰胺的研究

史言康1(), 李志元2, 刘丽强3, 滕厚开3, 徐慧2, 王素芳2, 赵清顺4, 韩恩山1()   

  1. 1. 河北工业大学化工学院, 天津 300401
    2. 中海油(天津)油田化工有限公司, 天津 300452
    3. 中海油天津化工研究设计院有限公司, 天津 300131
    4. 北京中天兰清环境科技有限公司, 北京 100102
  • 收稿日期:2023-08-03 出版日期:2023-10-20 发布日期:2023-10-18
  • 作者简介:

    史言康(1997— ),硕士。电话:13642046621,E-mail:

    韩恩山,博士,教授。电话:13820419202,E-mail:

  • 基金资助:
    河北省自然科学基金项目(E2022202095)

Study on poly-N-methoxy-N-methylacrylamide as hydrate inhibitor

Yankang SHI1(), Zhiyuan LI2, Liqiang LIU3, Houkai TENG3, Hui XU2, Sufang WANG2, Qingshun ZHAO4, Enshan HAN1()   

  1. 1. College of Chemical Engineering,Hebei University of Technology,Tianjin 300401,China
    2. CNOOC(Tianjin) Oilfield Chemical Co. ,Ltd. ,Tianjin 300452,China
    3. CenerTech Tianjin Chemical Research & Design Institute Co. ,Ltd. ,Tianjin 300131,China
    4. Beijing Zhongtian Lanqing Environment Technology Co. ,Ltd. ,Beijing 100102,China
  • Received:2023-08-03 Online:2023-10-20 Published:2023-10-18

摘要:

深海油田开采过程由于存在低温高压条件,管道中会因形成水合物而造成堵塞。设计并合成了新型水合抑制剂聚N-甲氧基-N-甲基丙烯酰胺(polyMEHAMs),以实现延缓水合物形成的目的。结果表明,polyMEHAMs在相对分子质量达到2.51×106(polyMEHAMs-6)时,具有明显的抑制水合物效果,其在去离子水中的浊点为63 ℃;在烷烃水体积比为1∶4、polyMEHAMs-6抑制剂投加量为2 500 mg/L、初始压力为4.0 MPa条件下,过冷度为10.8 ℃和12.3 ℃时polyMEHAMs-6抑制水合物的诱导时间分别为10.7 h和13.7 h,其在过冷度12.3 ℃下对水合物的抑制性能优于10.8 ℃。机理探索实验表明,疏水性—OCH3基团与酰胺O ̿      C—NHCH3基团形成的O ̿      C—NCH3—OCH3结构具有延缓水合物形成的能力。

关键词: 天然气水合物, 水合物抑制剂, 丙烯酰胺聚合物

Abstract:

In the process of deep-sea oil field exploitation,due to the existence of low-temperature and high-pressure conditions,hydrates can form in the pipeline,causing blockage. A new type of hydration inhibitor poly(N-methoxy-N-methylacrylamide)(polyMEHAMs) was designed and synthesized to delay the formation of hydrates. The results showed that when the polyMEHAMs had a relative molecular weight of 2.51×106(polyMEHAMs-6),it had a significant inhibitory effect on hydrates,with a cloud point of 63 ℃ in deionized water. Under the conditions of alkane and water volume ratio of 1∶4,polyMEHAMs-6 inhibitor dosage of 2 500 mg/L and initial pressure of 4.0 MPa,the induction time of polyMEHAMs-6 inhibiting hydrates at subcooling of 10.8 ℃ and 12.3 ℃ were 10.7 hours and 13.7 hours,and the inhibition performance of inhibitors at subcooling of 12.3 ℃ was better than that at subcooling of 10.8 ℃. The mechanism exploration experiment showed that the hydrophobic —OCH3 group and the amide O ̿      C—NHCH3 group formed O ̿      C—NCH3—OCH3 structure,which had the ability to delay hydrates formation.

Key words: natural gas hydrate, hydrate inhibitor, acrylamide polymer

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