Inhibition effects of polysaccharides for gas hydrate formation in methane-water system

doi:10.1016/j.molliq.2019.111435

GIEC OpenIR

	Inhibition effects of polysaccharides for gas hydrate formation in methane-water system
	Wan, Li 1,2,3,4,5,6; Zhang, Na 1,3,4,5,6; Liang, De-Qing1,3,4,5
	2019-10-15
发表期刊	JOURNAL OF MOLECULAR LIQUIDS
ISSN	0167-7322
卷号	292 页码:9
通讯作者	Liang, De-Qing(liangdq@ms.giec.ac.cn)
摘要	Water-soluble polymers such as polyvinylpyrrolidone (PVP), PVCap, and Gaffix VC-713 are predominantly used as kinetic hydrate inhibitors (KHIs) in the petroleum and natural gas industry to control the formation of hydrates. However, very few of them exhibit good biodegradability. Therefore, developing environment-friendly, biodegradable inhibitors is necessary. In this study, five natural polysaccharides, gum Arabic, sodium alginate, guar gum, carboxymethyl chitosan, and starch, were screened as potential green inhibitors. Their hydrate inhibition performances were investigated using a high-pressure stainless steel cell and methane gas and were compared with that of a typical KHI, PVP K90. The impact of the polysaccharides on the hydrate microstructure was investigated using powder X-ray diffraction and Raman spectroscopy. All polysaccharides increased the maximum subcooling of hydrate formation and inhibited the hydrate growth well below their respective maximum subcooling. Guar gum exhibited the best performance, most probably owing to the presence of the side anhydroglucose group in its skeleton. Remarkably, it lowered the gas uptake by similar to 30% as compared with that of pure water. The next best performance was shown by sodium alginate. Starch and carboxymethyl chitosan also performed well until the subcooling exceeded the respective maximum subcooling. In contrast, gum Arabic showed weak hydrate inhibition at low subcooling and rather started to promote hydrate formation when the subcooling was increased to 6 degrees C. Moreover, its hydrate promotion activity improved as the subcooling was further increased. Finally, the hydrate inhibition mechanism of the polysaccharides is discussed. (C) 2019 Elsevier B.V. All rights reserved.
关键词	Gas hydrate Hydrate inhibitors Polysaccharides Gas uptake
DOI	10.1016/j.molliq.2019.111435
关键词[WOS]	POLYVINYLPYRROLIDONE PVP CONCENTRATION ; MOLECULAR-DYNAMICS SIMULATION ; DUAL FUNCTION INHIBITORS ; AMINO-ACIDS ; KINETIC INHIBITOR ; ANTIFREEZE PROTEIN ; CATIONIC STARCH ; IONIC LIQUIDS ; GROWTH ; DECOMPOSITION
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41603062] ; China National Key Research and Development Plan Project[2017YFC0307306]
WOS研究方向	Chemistry ; Physics
项目资助者	National Natural Science Foundation of China ; China National Key Research and Development Plan Project
WOS类目	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000488658900066
出版者	ELSEVIER
引用统计	被引频次：33[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/25836
专题	中国科学院广州能源研究所
通讯作者	Liang, De-Qing
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Hunan Inst Technol, Hengyang 421002, Hunan, Peoples R China 3.CAS Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China 5.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Wan, Li,Zhang, Na,Liang, De-Qing. Inhibition effects of polysaccharides for gas hydrate formation in methane-water system[J]. JOURNAL OF MOLECULAR LIQUIDS,2019,292:9.
APA	Wan, Li,Zhang, Na,&Liang, De-Qing.(2019).Inhibition effects of polysaccharides for gas hydrate formation in methane-water system.JOURNAL OF MOLECULAR LIQUIDS,292,9.
MLA	Wan, Li,et al."Inhibition effects of polysaccharides for gas hydrate formation in methane-water system".JOURNAL OF MOLECULAR LIQUIDS 292(2019):9.