Mechanochemically Activated, Calcium Oxide-Based, Magnesium Oxide-Stabilized Carbon Dioxide Sorbents

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• 作者：Alexey Kurlov ; Dr. Marcin Broda ; Davood Hosseini ; Dr. Sharon J. Mitchell ; Prof.Dr. Javier Pé ; rez-Ramí ; rez and Prof.Dr. Christoph R. Mü ; ller
• 刊名：ChemSusChem
• 出版年：2016
• 出版时间：September 8, 2016
• 年：2016
• 卷：9
• 期：17
• 页码：2380-2390
• 全文大小：2297K
• ISSN：1864-564X

文摘

Carbon dioxide capture and storage (CCS) is a promising approach to reduce anthropogenic CO₂ emissions and mitigate climate change. However, the costs associated with the capture of CO₂ using the currently available technology, that is, amine scrubbing, are considered prohibitive. In this context, the so-called calcium looping process, which relies on the reversible carbonation of CaO, is an attractive alternative. The main disadvantage of naturally occurring CaO-based CO₂ sorbents, such as limestone, is their rapid deactivation caused by thermal sintering. Here, we report a scalable route based on wet mechanochemical activation to prepare MgO-stabilized, CaO-based CO₂ sorbents. We optimized the synthesis conditions through a fundamental understanding of the underlying stabilization mechanism, and the quantity of MgO required to stabilize CaO could be reduced to as little as 15 wt %. This allowed the preparation of CO₂ sorbents that exceed the CO₂ uptake of the reference limestone by 200 %.