Effect of Fulvic Acid and Sodium Chloride on the Phase Equilibrium of Methane Hydrate in Mixed Sand-Clay Sediment

doi:10.1021/acs.jced.8b00884

	Effect of Fulvic Acid and Sodium Chloride on the Phase Equilibrium of Methane Hydrate in Mixed Sand-Clay Sediment
	Lv, Tao 1,2,4,5; Li, Xiaosen 1,2,3,4; Chen, Zhaoyang 1,2,3,4; Xu, Chungang 1,2,3,4; Zhang, Yu 1,2,3,4; Cai, Jing 1,2,4,5
刊名	JOURNAL OF CHEMICAL AND ENGINEERING DATA
	2019-02-01
卷号	64 期号:2 页码:632-639
ISSN号	0021-9568
DOI	10.1021/acs.jced.8b00884
通讯作者	Chen, Zhaoyang(chenzy@ms.giec.ac.cn)
英文摘要	The phase equilibrium conditions for methane hydrate in mixed sand-clay sediment with the presence of fulvic acid (FA) and sodium chloride (NaCl) were measured using the multistep heating method. The experiments were conducted at the temperatures from 281.45 to 290.65 K and pressures from 6.33 to 17.39 MPa, respectively. The mixed sand-clay porous media and aqueous solutions containing 2.0, 6.0, and 10.0 wt % FA and 3.0 wt % NaCl were used. The experimental results indicate that the phase equilibrium curve of methane hydrate in mixed porous media shifts to the left side as compared to that in bulk solutions because of the capillary force and hydrophilic surfaces of porous media. FA is a thermodynamic inhibitor for methane hydrate formation as the -COO- and short alkyl substituent of FA could compete with hydrate for water molecules, and the inhibition effect of FA on methane hydrate formation is weaker as compared to 3.0 wt % NaCl under all studied concentration conditions. The phase equilibrium pressures of methane hydrate in mixed porous media with the presence of 2.0 wt % FA + 3.0 wt % NaCl,6.0 wt % FA + 3.0 wt % NaCl, 10.0 wt % FA + 3.0 wt % NaCl are all higher than that with only 3.0 wt % NaCl present, and the pressure increases with the increase in FA concentration. The existence of FA solutions and FA + NaCl solutions in mixed porous media does not affect the methane hydrate structure.
资助项目	National Natural Science Foundation of China[51576202] ; National Natural Science Foundation of China[51736009] ; National Key R&D Program of China[2016YFC0304002] ; Special Project for Marine Economy Development of Guangdong Province[GDME-2018D002] ; CAS Science and Technology Apparatus Development Program[YZ201619]
WOS关键词	MOLECULAR-DYNAMICS SIMULATION ; THERMAL-STIMULATION ; POROUS-MEDIA ; DISSOCIATION CONDITIONS ; CARBON-DIOXIDE ; PORE-SIZE ; GAS ; CO2 ; TEMPERATURES ; PRESSURES
WOS研究方向	Thermodynamics ; Chemistry ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000459224500029
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; Special Project for Marine Economy Development of Guangdong Province ; CAS Science and Technology Apparatus Development Program
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/24539]
专题	中国科学院广州能源研究所
通讯作者	Chen, Zhaoyang
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.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 Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lv, Tao,Li, Xiaosen,Chen, Zhaoyang,et al. Effect of Fulvic Acid and Sodium Chloride on the Phase Equilibrium of Methane Hydrate in Mixed Sand-Clay Sediment[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2019,64(2):632-639.
APA	Lv, Tao,Li, Xiaosen,Chen, Zhaoyang,Xu, Chungang,Zhang, Yu,&Cai, Jing.(2019).Effect of Fulvic Acid and Sodium Chloride on the Phase Equilibrium of Methane Hydrate in Mixed Sand-Clay Sediment.JOURNAL OF CHEMICAL AND ENGINEERING DATA,64(2),632-639.
MLA	Lv, Tao,et al."Effect of Fulvic Acid and Sodium Chloride on the Phase Equilibrium of Methane Hydrate in Mixed Sand-Clay Sediment".JOURNAL OF CHEMICAL AND ENGINEERING DATA 64.2(2019):632-639.