CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications
CO2 Capture by Accelerated Carbonation of Alkaline Wastes: A Review on Its Principles and Applications
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DOI：
10.4209/aaqr.2012.06.0149
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发表时间：
2012-10-01
影响因子：
4
通讯作者：
Chiang, Pen-Chi
中科院分区：
文献类型：
--
作者：
Pan, Shu-Yuan;Chang, E. E.;Chiang, Pen-Chi
CO2捕集、利用和储存（CCUS）是一种很有前途的技术，其中CO2以固体形式捕集和储存以供进一步利用，而不是以高浓度释放到大气中。在此框架下，一种称为加速碳酸化的新工艺得到了广泛的研究和开发。在此过程中，碱性材料与高纯度CO2在水分存在下反应，以将反应加速到几分钟或几小时的时间尺度。用于加速碳酸化的原料包括天然硅酸盐矿物（例如，例如，在一个实施例中，硅灰石、蛇纹石和橄榄石）和工业残渣（例如，例如，在一个实施例中，炼钢炉渣、城市固体废物焚烧炉（MSWI）灰和空气污染控制（APC）残余物）。本文主要研究利用钢渣和金属加工废水等工业碱性废弃物的碳酸化技术。碱性固体废弃物的碳酸化是一种有效的捕集CO2和消除固体废弃物中Ca（OH）（2）含量的方法，从而改善掺有碳酸化废弃物的混凝土的耐久性。然而，操作条件必须进一步研究的技术和CO2反应的最佳条件的经济可行性。
CO2 capture, utilization, and storage (CCUS) is a promising technology wherein CO2 is captured and stored in solid form for further utilization instead of being released into the atmosphere in high concentrations. Under this framework, a new process called accelerated carbonation has been widely researched and developed. In this process, alkaline materials are reacted with high-purity CO2 in the presence of moisture to accelerate the reaction to a timescale of a few minutes or hours. The feedstock for accelerated carbonation includes natural silicate-minerals (e. g., wollastonite, serpentine, and olivine) and industrial residues (e. g., steelmaking slag, municipal solid waste incinerator (MSWI) ash, and air pollution control (APC) residues). This research article focuses on carbonation technologies that use industrial alkaline wastes, such as steelmaking slags and metalworking wastewater. The carbonation of alkaline solid waste has been shown to be an effective way to capture CO2 and to eliminate the contents of Ca(OH)(2) in solid residues, thus improving the durability of concrete blended with the carbonated residues. However, the operating conditions must be further studied for both the economic viability of the technology and the optimal conditions for CO2 reaction.