气候变化领域集成服务门户(CCPortal): Carbon-captured sodium hydroxide solution for sustainable alkali-activated slag

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DOI	10.1016/j.susmat.2024.e00915
	Carbon-captured sodium hydroxide solution for sustainable alkali-activated slag
	Han, Seong Ho; Kim, Seung Mo; Jun, Yubin; Han, Tae Hoon; Kim, Jae Hong
发表日期	2024
ISSN	2214-9937
起始页码	40
卷号	40
英文摘要	The escalating impact of climate change, primarily driven by greenhouse gas emissions, has prompted global efforts to achieve carbon neutrality. Ordinary Portland cement production contributes approximately 7% to global carbon dioxide (CO2) emissions, necessitating innovative approaches for its sustainable production. A novel method is introduced that utilizes a sodium hydroxide (NaOH) solution captured with CO2 as an alkali activator for ground granulated blast furnace slag (GGBFS); it can substitute for the cement in producing construction materials. The method integrates CO2-dissolved alkaline solutions into the activation process of GGBFS, which results in the production of sustainable alkali-activated slag materials. Various concentrations of dissolved CO2 in the NaOH-based activator were used to evaluate their impact on compressive strength, setting time, and changes in phase composition. The results demonstrate that higher CO2 concentrations lead to increased compressive strength, but an excess hinders early-age strength development. X-ray diffraction and thermogravimetry analyses explain the phase changes during carbonation, emphasizing the role of CO2 in forming calcite and enhancing C -S -H production. Additionally, the study quantifies CO2 uptake, revealing a linear relationship with dissolved CO2 concentrations.
英文关键词	Carbon capture and utilization technology; CO2 solvent; Ground blast furnace slag; Sodium hydroxide
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Energy & Fuels ; Materials Science
WOS类目	Green & Sustainable Science & Technology ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:001221112400001
来源期刊	SUSTAINABLE MATERIALS AND TECHNOLOGIES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/293127
作者单位	University of Missouri System; Missouri University of Science & Technology; Korea Advanced Institute of Science & Technology (KAIST)
推荐引用方式 GB/T 7714	Han, Seong Ho,Kim, Seung Mo,Jun, Yubin,et al. Carbon-captured sodium hydroxide solution for sustainable alkali-activated slag[J],2024,40.
APA	Han, Seong Ho,Kim, Seung Mo,Jun, Yubin,Han, Tae Hoon,&Kim, Jae Hong.(2024).Carbon-captured sodium hydroxide solution for sustainable alkali-activated slag.SUSTAINABLE MATERIALS AND TECHNOLOGIES,40.
MLA	Han, Seong Ho,et al."Carbon-captured sodium hydroxide solution for sustainable alkali-activated slag".SUSTAINABLE MATERIALS AND TECHNOLOGIES 40(2024).