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	Experimental investigation of enhanced carbonation by solvent extraction for indirect CO2 mineral sequestration
	Bao, Weijun; Li, Huiquan; Zhang, Yi
刊名	GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
	2014-12-01
卷号	4期号:6页码:785-799
关键词	indirect CO2 mineral sequestration tributyl phosphate (TBP) acetic acid aragonite coupled reactive crystallization and solvent extraction
ISSN号	2152-3878
其他题名	Greenh. Gases
中文摘要	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
英文摘要	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
WOS标题词	Science & Technology ; Technology ; Life Sciences & Biomedicine
类目[WOS]	Energy & Fuels ; Engineering, Environmental ; Environmental Sciences
研究领域[WOS]	Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
关键词[WOS]	PRECIPITATED CALCIUM-CARBONATE ; STEEL CONVERTER SLAG ; ACETIC-ACID ; HIGH-PRESSURES ; DISSOLUTION ; DIOXIDE ; ACETATE ; SOLUBILITY ; ARAGONITE ; KINETICS
收录类别	SCI
原文出处	://WOS:000345776600009
语种	英语
WOS记录号	WOS:000345776600009
公开日期	2015-04-01
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/11701]
专题	过程工程研究所_研究所（批量导入）
作者单位	Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
推荐引用方式 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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