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Equilibrium Hydrate Formation Conditions of CO2 + N-2 + SO2 Ternary Simulated Flue Gas in SO2 and Tetra-n-butylammonium Bromide Containing Aqueous Solutions
Chen, Chao1,2,3; Li, Xiao-Sen1,2; Chen, Zhao-Yang1,2; Xia, Zhi-Ming1,2; Yan, Ke-Feng1,2; Cai, Jing1,2
2014
Source PublicationJOURNAL OF CHEMICAL AND ENGINEERING DATA
Volume59Issue:1Pages:103-109
AbstractThe equilibrium hydrate formation conditions for ternary simulated flue gas [CO2 (0.1368) + N-2 (0.8547) SO2 (0.0085)] with SO2 aqueous solutions, and SO2 + tetra-n-butyl ammonium bromide (TBAB) aqueous solutions were measured using the temperature search method, over the temperature and pressure range of (272.85 to 283.15) K and (1.20 to 5.09) MPa, respectively. The corresponding equilibrium gas compositions were analyzed. The effects of SO2 concentration and TBAB additive on the hydrate phase equilibrium were studied. For the flue gas and SO2 aqueous solution, the presence of SO2 reduces the hydrate formation pressure. The higher is the SO2 concentration in aqueous solution, the easier the hydrate forms, and the higher the SO2 concentration in equilibrium gas phase is. N-2 mole fractions in equilibrium gas phase are higher than that in the feed flue gas, while CO2 is lower due to its relative high solubility. For a given system, the equilibrium hydrates formation pressure increases with the increase in temperature. Both SO2 and N-2 mole fractions in equilibrium gas phase decrease with the increase in pressure, while the CO2 mole fraction increases. TBAB solution with w(4) = 0.050 not only reduces the equilibrium hydrates formation pressure markedly, but also helps the dissolution of SO2 in aqueous solution. The SO2 concentrations in equilibrium gas phase for the TBAB addition system are much smaller than those without TBAB addition. The pressure reducing effect of the TBAB promoter for SO2 containing flue gas is dependent on the SO2 concentration and smaller than that for flue gas without SO2. A small amount of SO2 produces a synergy with TBAB to promote the hydrate formation, but the high SO2 concentration produces an inhibition on the hydrate formation, and causes the hydrate equilibrium pressure increase. The optimum SO2 mass fraction in solution is lower than 0.010.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/je400875n
WOS Subject ExtendedChemistry ; Engineering
WOS KeywordCARBON-DIOXIDE CAPTURE ; PRE-COMBUSTION CAPTURE ; BUTYL AMMONIUM BROMIDE ; CLATHRATE HYDRATE ; PHASE-EQUILIBRIUM ; GAS HYDRATE ; FLUE-GAS ; AQUEOUS-SOLUTIONS ; SEPARATION ; MIXTURES
Indexed BySCI
Language英语
WOS SubjectChemistry, Multidisciplinary ; Engineering, Chemical
WOS IDWOS:000329677700015
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10717
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100083, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Chen, Chao,Li, Xiao-Sen,Chen, Zhao-Yang,et al. Equilibrium Hydrate Formation Conditions of CO2 + N-2 + SO2 Ternary Simulated Flue Gas in SO2 and Tetra-n-butylammonium Bromide Containing Aqueous Solutions[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2014,59(1):103-109.
APA Chen, Chao,Li, Xiao-Sen,Chen, Zhao-Yang,Xia, Zhi-Ming,Yan, Ke-Feng,&Cai, Jing.(2014).Equilibrium Hydrate Formation Conditions of CO2 + N-2 + SO2 Ternary Simulated Flue Gas in SO2 and Tetra-n-butylammonium Bromide Containing Aqueous Solutions.JOURNAL OF CHEMICAL AND ENGINEERING DATA,59(1),103-109.
MLA Chen, Chao,et al."Equilibrium Hydrate Formation Conditions of CO2 + N-2 + SO2 Ternary Simulated Flue Gas in SO2 and Tetra-n-butylammonium Bromide Containing Aqueous Solutions".JOURNAL OF CHEMICAL AND ENGINEERING DATA 59.1(2014):103-109.
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