摘要：Low dosage kinetic hydrate inhibitors (KHIs) are a kind of alternative chemical additives to high dosage thermodynamic inhibitors for preventing gas hydrate formation in oil & gas production wells and transportation pipelines. In this paper, a new KHI, poly (N-vinyl caprolactam)-co-tert-butyl acrylate (PVCap-co-TBA), was successfully synthesized with N-vinyl caprolactam (NVCap) and tert-butyl acrylate. The kinetic inhibition performances of PVCap-co-TBA on the formations of both structure I methane hydrate and structure II natural gas hydrate were investigated by measuring the onset times of hydrate formation under different conditions and compared with commercial KHIs such as PVP, PVCap and inhibex 501. The results indicated that PVCap-co-TBA outperformed these widely applied inhibitors for both structure I and structure II hydrates. At the same dosage of KHI, the maximum tolerable degree of subcooling under which the onset time of hydrate formation exceeded 24 hours for structure I hydrate was much lower than that for structure II hydrate. The inhibition strength increased with the increasing dosage of PVCap-co-TBA; The maximum tolerable degree of subcooling for the natural gas hydrate is more than 10 K when the dosage was higher than 0.5% (mass) while it achieved 12 K when that dosage rose to 0.75% (mass). Additionally, we found polypropylene glycol could be used as synergist at the dosage of 1.0 % (mass) or so, under which the kinetic inhibition performance of PVCap-co-TBA could be improved significantly. All evaluation results demonstrated that PVCap-co-TBA was a very promising KHI and a competitive alternative to the existing commercial KHIs. (C) 2022 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.

关键字：Hydrate; Kinetics; Inhibitor; Poly (N-vinyl aprolactam)-co-tert-butyl acrylate; Synergist; Synthesis

ISSN号：1004-9541

卷、期、页：卷: 50页: 317-325

发表日期：2022-10-01

影响因子：3.170500

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）,CSCD（中国科技引文期刊）（核心）,CSTPCD（中国科技核心期刊）（统计源期刊）,EI（工程索引）

发表期刊名称：CHINESE JOURNAL OF CHEMICAL ENGINEERING

参与作者：庞维新,李清平,Xu, Xinjing,Ji, Jinfeng

通讯作者：黄兴,朱然,程立伟,祝一健

第一作者：肖朋,王晓辉,刘蓓,孙长宇,陈光进

论文类型：期刊论文

论文概要：黄兴,朱然,程立伟,祝一健,肖朋,王晓辉,刘蓓,孙长宇,庞维新,李清平,陈光进,Xu, Xinjing,Ji, Jinfeng，Synthesis and evaluation of poly (N-vinyl caprolactam)-co-tert-butyl acrylate as kinetic hydrate inhibitor，CHINESE JOURNAL OF CHEMICAL ENGINEERING，2022，卷: 50页: 317-325

论文题目：Synthesis and evaluation of poly (N-vinyl caprolactam)-co-tert-butyl acrylate as kinetic hydrate inhibitor