碳化作用
矿化(土壤科学)
原材料
冶金
浸出(土壤学)
固碳
材料科学
废物管理
环境科学
化学
化学工程
工程类
二氧化碳
有机化学
土壤科学
土壤水分
作者
Seokyoon Moon,Eunae Kim,Soyoung Noh,Purnaning Tuwuh Triwigati,Soyoung Choi,Youngjune Park
标识
DOI:10.1016/j.jece.2024.112448
摘要
Carbon mineralization technology has emerged as a promising method for permanently sequestering CO2 by transforming it into a thermodynamically stable solid carbonate material. Recently, alkaline industrial waste, particularly from steel and iron-making processes, has been identified as a proper feedstock due to its high potential for CO2 storage and the ability to reduce landfill strain significantly. In this context, this review focuses on the possibilities and challenges associated with the carbon mineralization of steel and iron-making slag. Given that the composition and characteristics of feedstock play crucial roles in carbon mineralization, in-depth examinations of the generation of by-products and the corresponding physicochemical properties were conducted. In the context of the carbon mineralization process, our primary focus was on ex-situ carbon mineralization, which encompasses both direct and indirect carbonation routes, while elucidating the intricate mechanisms underlying both types of carbonation. Current challenges such as low leaching efficiency rates, slow kinetics, complex slag structures and silicate passivation phenomena are also addressed. For practical applications, it is essential to integrate valuable material production with the carbon mineralization process. Accordingly, various methods for producing precipitated calcium carbonates, construction materials with heavy-metal stabilization, valuable element recovery, and possible integration with hydrogen production processes, were introduced. Lastly, we provide an overview of the current state of the art of carbon mineralization technology and suggest future research directions.
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