Evaluation of Kinetic Inhibition of Methane Hydrate Formation by a Copolymer of N-Vinylcaprolactam with 1-Vinylimidazole

doi:10.1021/acs.energyfuels.9b01935

	Evaluation of Kinetic Inhibition of Methane Hydrate Formation by a Copolymer of N-Vinylcaprolactam with 1-Vinylimidazole
	Long, Zhen 1,2,3,4; Lu, Zhilin 1,2,3,4,5; Ding, Qihang 1,2,3,4,5; Zhou, Xuebing 1,2,3,4; Lei, Jiao 6; Liang, Deqing 1,2,3,4
刊名	ENERGY & FUELS
	2019-10-01
卷号	33 期号:10 页码:10133-10142
ISSN号	0887-0624
DOI	10.1021/acs.energyfuels.9b01935
通讯作者	Liang, Deqing(liangdq@ms.giec.ac.cn)
英文摘要	This study investigated methane hydrate inhibition by a new polyvinyl lactam-based kinetic hydrate inhibitor (KHI) by determining the maximum subcooling temperature, induction time, and growth rate using a high-pressure sapphire reactor. The studied KHI, namely, the random copolymer of N-vinylcaprolactam and 1-vinylimidazole (PVCap-co-VIM), was synthesized by free radical solution polymerization with the objective of producing copolymers with higher cloud points than the poly(N-vinylcaprolactam) (PVCap) homopolymer. These data were compared with those of laboratory-made PVCap and commercial poly(N-vinylpyrrolidone) (PVPK90) under various cooling rates (1.0, 2.0, and 5.0 K/h) and mass concentrations (0.5, 1.0, and 2.0 wt %). The experimental results showed that the cooling rate had little effect on the maximum subcooling temperature of the KHIs. PVCap-co-VIM was capable of delaying the nucleation of hydrate crystals for a longer time than PVPK90 and successfully suppressed hydrate growth in the early stage of hydrate formation. PVCap performed better than PVCap-co-VIM under the same conditions, but PVCap-co-VIM exhibited a significantly higher cloud point temperature (T-CI > 70 degrees C) than PVCap (T-CI = 37.9 degrees C), which was beneficial for field applications. Furthermore, the measured powder X-ray diffraction and Raman spectral data showed that the formed hydrate structures were the same (structure I) for all the studied KHI-containing systems, despite some differences in the characteristic peak intensities as a result of different inhibitory activities. Cryo-scanning electron microscopy images illustrated that the morphology of the formed CH4 hydrate crystals varied significantly by KHIs, which could be helpful for safe pipeline fluid transportation.
资助项目	National Natural Science Foundation of China[51506202] ; National Natural Science Foundation of China[41603062] ; Pearl River S&T Nova Program of Guangzhou[201806010114] ; National Key Research and Development Plan of China[2017YFC0307306]
WOS关键词	GAS HYDRATE ; CRYSTAL-GROWTH ; CH4 HYDRATE ; PERFORMANCE ; POLYMERS ; PRESERVATION ; GLYCOL ; WATER
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000492113000098
资助机构	National Natural Science Foundation of China ; Pearl River S&T Nova Program of Guangzhou ; National Key Research and Development Plan of China
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/26193]
专题	中国科学院广州能源研究所
通讯作者	Liang, Deqing
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 3.Chinese Acad Sci, Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China 5.Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou 215123, Peoples R China 6.Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Long, Zhen,Lu, Zhilin,Ding, Qihang,et al. Evaluation of Kinetic Inhibition of Methane Hydrate Formation by a Copolymer of N-Vinylcaprolactam with 1-Vinylimidazole[J]. ENERGY & FUELS,2019,33(10):10133-10142.
APA	Long, Zhen,Lu, Zhilin,Ding, Qihang,Zhou, Xuebing,Lei, Jiao,&Liang, Deqing.(2019).Evaluation of Kinetic Inhibition of Methane Hydrate Formation by a Copolymer of N-Vinylcaprolactam with 1-Vinylimidazole.ENERGY & FUELS,33(10),10133-10142.
MLA	Long, Zhen,et al."Evaluation of Kinetic Inhibition of Methane Hydrate Formation by a Copolymer of N-Vinylcaprolactam with 1-Vinylimidazole".ENERGY & FUELS 33.10(2019):10133-10142.