常压下合成混凝土细粉直接水合碳酸化对一氧化碳的利用
CO Utilization via Direct Aqueous Carbonation of Synthesized Concrete Fines under Atmospheric Pressure.
作者信息
Ho Hsing-Jung, Iizuka Atsushi, Shibata Etsuro, Tomita Hisashi, Takano Kenji, Endo Takumi
机构信息
Department of Environmental Studies for Advanced Society, Graduate School of Environmental Studies, Tohoku University, Aoba-468-1 Aramaki, Aoba-ku, Sendai, Miyagi 980-0845, Japan.
Center for Mineral Processing and Metallurgy, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan.
出版信息
ACS Omega. 2020 Jun 22;5(26):15877-15890. doi: 10.1021/acsomega.0c00985. eCollection 2020 Jul 7.
Mineral carbonation using alkaline wastes is an attractive approach to CO utilization. Owing to the difference between waste CO and feedstock CO, developing CO utilization technologies without CO purification and pressurization is a promising concept. This study investigated a potential method for CO utilization via direct aqueous carbonation of synthesized concrete fines under atmospheric pressure and low CO concentration. The carbonation reaction with different solid-liquid ratios and different concentrations of introduced CO was examined in detail. Under basic conditions, a CO uptake of 0.19 g-CO/g-concrete fines demonstrated that direct aqueous carbonation of concrete fines under atmospheric pressure and low CO concentration is effective. The CaCO concentration, degree of carbonation, and reaction mechanism were clarified. Furthermore, characterization of the carbonated products was used to evaluate ways of utilizing the carbonated products.
利用碱性废物进行矿物碳酸化是一种有吸引力的二氧化碳利用方法。由于废弃二氧化碳与原料二氧化碳存在差异，开发无需二氧化碳净化和加压的二氧化碳利用技术是一个很有前景的概念。本研究探讨了一种在常压和低二氧化碳浓度下通过合成混凝土细粉直接水相碳酸化来利用二氧化碳的潜在方法。详细研究了不同固液比和不同引入二氧化碳浓度下的碳酸化反应。在碱性条件下，每克混凝土细粉吸收0.19克二氧化碳，这表明在常压和低二氧化碳浓度下混凝土细粉的直接水相碳酸化是有效的。阐明了碳酸钙浓度、碳酸化程度和反应机理。此外，对碳酸化产物的表征用于评估利用碳酸化产物的方式。
Zotero 插件