Experimental study on hydrate-based gas separation of mixed CH4/CO2 using unstable ice in a silica gel bed

doi:10.1016/j.energy.2018.05.124

	Experimental study on hydrate-based gas separation of mixed CH4/CO2 using unstable ice in a silica gel bed
	Liu, Jun 1,2,3,4,5; Ding, Jia-Xiang 1,2,3,4,5; Liang, De-Qing 1,2,3,4
刊名	ENERGY
	2018-08-15
卷号	157 页码:54-64
关键词	Biogas Silica gel Hydrate-based Separation Unstable ice
ISSN号	0360-5442
DOI	10.1016/j.energy.2018.05.124
通讯作者	Liang, De-Qing(liangdq@ms.giec.ac.cn)
英文摘要	The reduction of energy consumed in the hydrate formation process has attracted a great attention in many fields, such as renewable energy resources and environmental issues. In this work, the water and the ice were investigated by powder X-ray diffraction (PXRD) and cryo-scanning electron microscope (SEM) in the silica gel, and the hydrate-based gas separation of CH4/CO2 mixtures was studied at four different pressures (2.6, 3.7, 4.6 and 5.2 MPa) and three different temperatures (271.1, 268.1 and 263.1 K) in silica gel bed. The results showed that water was transformed into discontinuous unstable hexagonal ice crystals on silica gel surface, which was in favor of hydrate formation. Water conversion to hydrate and normalized gas consumption were up to 100% and 0.151 (mol/mol) at 263.1 K and above 4.2 MPa, respectively. CO2 proportion in hydrate, split fraction of CH4 in equilibrium gas and separation factor were up to 99.60%, 99.8% and 257.34 at 2.6 MPa and in the temperature range of 268.1-271.1 K, respectively. It will be of practical interest in relation to losing methane of multistage hydrate-based biogas purification technology. (C) 2018 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[41374149] ; CNPC[2015A-4813] ; CAS[2015A-4813]
WOS关键词	PRE-COMBUSTION CAPTURE ; SIMULATED LANDFILL GAS ; CARBON-DIOXIDE ; CLATHRATE-HYDRATE ; CO2 CAPTURE ; FLUE-GAS ; PORE STRUCTURE ; NATURAL-GAS ; PHASE-EQUILIBRIA ; CH4 RECOVERY
WOS研究方向	Thermodynamics ; Energy & Fuels
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000440876600006
资助机构	National Natural Science Foundation of China ; CNPC ; CAS
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/23784]
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 Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, 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.Univ Chinese Acad Sci, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jun,Ding, Jia-Xiang,Liang, De-Qing. Experimental study on hydrate-based gas separation of mixed CH4/CO2 using unstable ice in a silica gel bed[J]. ENERGY,2018,157:54-64.
APA	Liu, Jun,Ding, Jia-Xiang,&Liang, De-Qing.(2018).Experimental study on hydrate-based gas separation of mixed CH4/CO2 using unstable ice in a silica gel bed.ENERGY,157,54-64.
MLA	Liu, Jun,et al."Experimental study on hydrate-based gas separation of mixed CH4/CO2 using unstable ice in a silica gel bed".ENERGY 157(2018):54-64.