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Experimental investigation of enhanced carbonation by solvent extraction for indirect CO2 mineral sequestration
Alternative TitleGreenh. Gases
Bao, Weijun; Li, Huiquan; Zhang, Yi
2014-12-01
Source PublicationGREENHOUSE GASES-SCIENCE AND TECHNOLOGY
ISSN2152-3878
Volume4Issue:6Pages:785-799
AbstractAn indirect CO2 mineral sequestration involving two separated steps with acetic acid as a recycling medium provides a promising method for CO2 sequestration as well as the minimum CO2 emission for calcium carbonate production. In such an indirect route, the calcium carbonate production in the second gas-liquid reactive crystallization step has been challenged by low carbonation efficiency. This paper describes significant enhancement of the second step by coupling reactive crystallization and solvent extraction with the introduction of the organic solvent, tributyl phosphate (TBP), to the process. Based on the reaction mechanism of this enhanced carbonation process, many influencing factors including stirring speed, phase ratio, reaction time, reaction temperature, CO2 partial pressure, and the composition of the initial aqueous solution, were studied. Given the operating conditions of 60 min reaction time, 500 rpm stirring speed, organic-to-aqueous phase volume ratio of 1, 80 degrees C reaction temperature, 4.0 MPa CO2 partial pressure, and initial pH of 7, the obtained crystallization conversion in the second step was found to increase from 20% to above 50%, with the incorporation of TBP and the addition of magnesium acetate. (C) 2014 Society of Chemical Industry and John Wiley & Sons, Ltd; An indirect CO2 mineral sequestration involving two separated steps with acetic acid as a recycling medium provides a promising method for CO2 sequestration as well as the minimum CO2 emission for calcium carbonate production. In such an indirect route, the calcium carbonate production in the second gas-liquid reactive crystallization step has been challenged by low carbonation efficiency. This paper describes significant enhancement of the second step by coupling reactive crystallization and solvent extraction with the introduction of the organic solvent, tributyl phosphate (TBP), to the process. Based on the reaction mechanism of this enhanced carbonation process, many influencing factors including stirring speed, phase ratio, reaction time, reaction temperature, CO2 partial pressure, and the composition of the initial aqueous solution, were studied. Given the operating conditions of 60 min reaction time, 500 rpm stirring speed, organic-to-aqueous phase volume ratio of 1, 80 degrees C reaction temperature, 4.0 MPa CO2 partial pressure, and initial pH of 7, the obtained crystallization conversion in the second step was found to increase from 20% to above 50%, with the incorporation of TBP and the addition of magnesium acetate. (C) 2014 Society of Chemical Industry and John Wiley & Sons, Ltd
KeywordIndirect Co2 Mineral Sequestration Tributyl Phosphate (Tbp) Acetic Acid Aragonite Coupled Reactive Crystallization And Solvent Extraction
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
DOI10.1002/ghg.1440
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPRECIPITATED CALCIUM-CARBONATE ; STEEL CONVERTER SLAG ; ACETIC-ACID ; HIGH-PRESSURES ; DISSOLUTION ; DIOXIDE ; ACETATE ; SOLUBILITY ; ARAGONITE ; KINETICS
WOS Research AreaEnergy & Fuels ; Engineering ; Environmental Sciences & Ecology
WOS SubjectEnergy & Fuels ; Engineering, Environmental ; Environmental Sciences
WOS IDWOS:000345776600009
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11701
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Bao, Weijun,Li, Huiquan,Zhang, Yi. Experimental investigation of enhanced carbonation by solvent extraction for indirect CO2 mineral sequestration[J]. GREENHOUSE GASES-SCIENCE AND TECHNOLOGY,2014,4(6):785-799.
APA Bao, Weijun,Li, Huiquan,&Zhang, Yi.(2014).Experimental investigation of enhanced carbonation by solvent extraction for indirect CO2 mineral sequestration.GREENHOUSE GASES-SCIENCE AND TECHNOLOGY,4(6),785-799.
MLA Bao, Weijun,et al."Experimental investigation of enhanced carbonation by solvent extraction for indirect CO2 mineral sequestration".GREENHOUSE GASES-SCIENCE AND TECHNOLOGY 4.6(2014):785-799.
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