Energy processes and technologyProgress of influence mechanism of kinetic hydrate inhibitors

doi:10.16085/j.issn.1000-6613.2017-1240

Abstract

Abstract: As one kind of low dosage hydrate inhibitors,kinetic hydrate inhibitors (KHIs)can be used to solve flow assurance problems caused by hydrate plugging in a risk management way,which has been attracted by lots of researchers at home and abroad. The tolerable maximum sub-cooling of KHIs and the extension of induction time for hydrate formation by KHIs were summarized as two types of evaluation indexes of KHIs. Meanwhile,the influences of KHIs on hydrate formation and dissociation were also reviewed. The results indicated that the performance of KHIs was good to extend induction time longer with higher tolerable maximum sub-cooling. There were complex influences of KHIs on hydrate formation and dissociation,and the effects of KHIs on gas consumption rate,gas amount consumed,morphology of hydrate,dissociation temperature,time and rate,and "memory effect" were analyzed. Based on the review,the influence mechanisms of KHIs on hydrate were concluded,and especially a concept of adsorption inhibition mechanism was proposed for chemistry KHIs. Finally,the suggestions for further deep research of KHIs were addressed.

Key words: hydrate, kinetic hydrate inhibitors, nucleation, growth and decomposition, adsorption

摘要： 水合物动力学抑制剂作为低液量抑制剂，其可应用于深水流动保障风险控制水合物冻堵问题，受到国内外研究者的广泛关注。本文重点阐述了动力学抑制剂的可承受最大过冷度和对诱导时间的延长这两个评价指标，同时梳理了动力学抑制剂对水合物生成及分解过程影响的研究成果。总体而言，可承受最大过冷度越大、延长诱导时间程度越强的动力学抑制剂，抑制水合物生成并保障流动安全的可靠性越高；动力学抑制剂对水合物生成与分解过程存在复杂的影响规律。本文将其对气体消耗速率、气体消耗量和形态，分解温度、时间和分解速率，“记忆效应”等影响进行了分析。结合上述研究成果，总结了动力学抑制剂对水合物的影响机理，特别是提出了化学型动力学抑制剂对水合物吸附抑制机理的概念示意图。最后，给出了未来深入开展动力学抑制剂研究的建议。

关键词: 水合物, 动力学抑制剂, 成核, 生长分解, 吸附

CLC Number:

TE88

CHEN Yuchuan, SHI Bohui, LI Wenqing, LIU Yang, SONG Shangfei, DING Lin, GONG Jing. Energy processes and technologyProgress of influence mechanism of kinetic hydrate inhibitors[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1726-1743.

陈玉川, 史博会, 李文庆, 柳杨, 宋尚飞, 丁麟, 宫敬. 水合物动力学抑制剂的作用机理研究进展[J]. 化工进展, 2018, 37(05): 1726-1743.

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