Formation Kinetics of the Mixed Cyclopentane-Carbon Dioxide Hydrates in Aqueous Sodium Chloride Solutions

doi:10.3390/en13174388

	Formation Kinetics of the Mixed Cyclopentane-Carbon Dioxide Hydrates in Aqueous Sodium Chloride Solutions
	Zhou, Xuebing 1,2,3,4; Zhang, Ye 1; Zang, Xiaoya 1,2,3,4; Liang, Deqing 1,2,3,4
刊名	ENERGIES
	2020-09-01
卷号	13 期号:17 页码:10
关键词	gas hydrate desalination carbon dioxide cyclopentane PXRD
DOI	10.3390/en13174388
通讯作者	Liang, Deqing(liangdq@ms.giec.ac.cn)
英文摘要	Hydrate formation from cyclopentane (CP) and carbon dioxide was measured at 281 K by powder X-ray diffraction (PXRD) and macroscopic methods. The effect of initial pressure and CP mass fraction in liquid phase was analyzed. The results showed that hydrate formation was assumed to start with the nucleation of the mixed CP-CO(2)hydrate with small fraction of CO(2)followed by a large continuous CO(2)adsorption. Initial pressure was found to have a positive correlation with the total CO(2)consumptions when the initial pressure was below 2.5 MPa. However, the total CO(2)consumptions dropped by over a half as the initial pressure was 3.0 MPa. PXRD revealed that all the hydrate samples formed at different initial pressures were structure II. The CO(2)consumptions were assumed to be inhibited by the competitive occupation of 5(12)6(4)cages between CP and CO(2)molecules when the initial pressure was above 2.5 MPa. The CO(2)consumptions were also found to be reduced as the CP mass fraction was above 0.25. An excess of CP molecules was not assumed to strengthen the formation of the mixed CP-CO(2)hydrates at the initial stage, but increased the thickness of liquid CP film at aqueous brine and hydrate particles, which increased the diffusion resistance of CO(2)molecules. Therefore, the suitable initial pressure and the CP mass fraction for the mixed CP-CO(2)hydrate formation should be around 2.5 MPa and 0.2, respectively.
资助项目	National Natural Science Foundation of China[51706230] ; National Key Research and Development Plan of China[2017YFC0307306] ; Guangdong Natural Science Foundation[2020A1515010374] ; Guangdong MEPP Fund[GDOE [2019]A39]
WOS关键词	CO2 HYDRATE ; CLATHRATE HYDRATE ; PHASE-EQUILIBRIUM ; SALT REMOVAL ; WATER ; GROWTH ; BRINE ; DESALINATION ; NUCLEATION ; MIXTURE
WOS研究方向	Energy & Fuels
语种	英语
出版者	MDPI
WOS记录号	WOS:000569711500001
资助机构	National Natural Science Foundation of China ; National Key Research and Development Plan of China ; Guangdong Natural Science Foundation ; Guangdong MEPP Fund
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/32024]
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, Peoples R China 2.CAS Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Xuebing,Zhang, Ye,Zang, Xiaoya,et al. Formation Kinetics of the Mixed Cyclopentane-Carbon Dioxide Hydrates in Aqueous Sodium Chloride Solutions[J]. ENERGIES,2020,13(17):10.
APA	Zhou, Xuebing,Zhang, Ye,Zang, Xiaoya,&Liang, Deqing.(2020).Formation Kinetics of the Mixed Cyclopentane-Carbon Dioxide Hydrates in Aqueous Sodium Chloride Solutions.ENERGIES,13(17),10.
MLA	Zhou, Xuebing,et al."Formation Kinetics of the Mixed Cyclopentane-Carbon Dioxide Hydrates in Aqueous Sodium Chloride Solutions".ENERGIES 13.17(2020):10.