High-efficiency separation of CO2 from CO2-CH4 gas mixtures via gas hydrates under static conditions

doi:10.1016/j.seppur.2022.121297

GIEC OpenIR

	High-efficiency separation of CO2 from CO2-CH4 gas mixtures via gas hydrates under static conditions
	Cheng, Zucheng 1; Liu, Weiguo 1; Li, Shaohua 1; Wang, Sijia 1; Liu, Yingying 1; Sun, Xiang 1; Chen, Cong 1; Jiang, Lanlan 1,2; Song, Yongchen 1
	2022-09-01
发表期刊	SEPARATION AND PURIFICATION TECHNOLOGY
ISSN	1383-5866
卷号	296 页码:12
通讯作者	Jiang, Lanlan(lanlan@dlut.edu.cn) ; Song, Yongchen(songyc@dlut.edu.cn)
摘要	Hydrate technology with high gas storage capacity and excellent safety features has attracted much attention for capturing CO2 from biogas to produce purified CH4. When considering operational efficiency, it is desirable to overcome technical barriers such as slow hydrate generation and low separation efficiency. Therefore, based on the properties of surfactant-enhanced hydrate generation kinetics, this work first systematically evaluated the performance of 500 ppm SDS on the separation efficiency of 40 mol% CO2 and 60 mol% CH4 simulated biogas. The experimental results show a significant increase in gas capture at higher driving forces, with the rise being dominated by the CH4 component, indicating that larger driving forces reduce hydrate selectivity to CO2-CH4 and weaken gas separation efficiency, with a maximum CO2 recovery of 84.24 +/- 1.19% at 275.15 K and 8 MPa. Interestingly, hydrate growth mainly occurred in the liquid phase, leading to the separation factor being positively correlated with the induction time with sufficient CO2 dissolution. In comparison, the gas capture per unit volume of solution could be improved by more than a factor of 2 at higher gas-liquid ratios. The best separation factor of 7.84 +/- 0.73 was achieved, and separation factors in general gradually decreased with increasing gas-liquid ratio; however, there was high-pressure failure behavior. Furthermore, the impact of the defoamer on separation efficiency was deeply investigated for SDS decomposition foaming, with results showing that the defoamer would alleviate hydrate decomposition foaming behaviour while having no significant effect on hydrate generation kinetics and separation efficiency.
关键词	Hydrate Separation efficiency Kinetics Gas-liquid ratio Defoamer
DOI	10.1016/j.seppur.2022.121297
关键词[WOS]	CLATHRATE HYDRATE ; FLUE-GAS ; SEMICLATHRATE HYDRATE ; CAPTURE ; METHANE ; TBAB ; SDS ; CO2/CH4 ; BIOGAS ; WATER
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52176057] ; Dalian Leading Academic & key Plan Project[2020JJ25CY010] ; Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences[E129kf1101]
WOS研究方向	Engineering
项目资助者	National Natural Science Foundation of China ; Dalian Leading Academic & key Plan Project ; Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences
WOS类目	Engineering, Chemical
WOS记录号	WOS:000833462800005
出版者	ELSEVIER
引用统计	被引频次：22[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/344007/37064
专题	中国科学院广州能源研究所
通讯作者	Jiang, Lanlan; Song, Yongchen
作者单位	1.Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Zucheng,Liu, Weiguo,Li, Shaohua,et al. High-efficiency separation of CO2 from CO2-CH4 gas mixtures via gas hydrates under static conditions[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2022,296:12.
APA	Cheng, Zucheng.,Liu, Weiguo.,Li, Shaohua.,Wang, Sijia.,Liu, Yingying.,...&Song, Yongchen.(2022).High-efficiency separation of CO2 from CO2-CH4 gas mixtures via gas hydrates under static conditions.SEPARATION AND PURIFICATION TECHNOLOGY,296,12.
MLA	Cheng, Zucheng,et al."High-efficiency separation of CO2 from CO2-CH4 gas mixtures via gas hydrates under static conditions".SEPARATION AND PURIFICATION TECHNOLOGY 296(2022):12.