Kang Cheng , Yongsong Ma , Meiyu Zhao , Kaifa Du , Huayi Yin , Dihua Wang
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引用次数: 3
Abstract
Molten salt carbon dioxide capture and electrochemical transformation (MSCC-ET) is a promising solution for reducing global CO2 emissions. However, effectively separating molten salt electrolytes from carbon material using an environmental manner remained to be solved. Typical separation methods (acid-leaching and water-leaching) will generate secondary CO2 emissions and need a high consumption of water and heat energy. Herein, we propose an ammonium chloride (NH4Cl) roasting approach (ACRA) to separate lithium salts from the carbon obtained by the MSCC-ET process. Using the NH4Cl-assisted roasting approach, the low-soluble Li2CO3 is converted to high-soluble LiCl that can be easily separated from the carbon. The recovery rate of carbon material reaches 91.67 % at optimal roasting conditions. Compared with water-leaching method, ACRA process can save 80.61 % of water and 76.79 % of heat energy. In addition, ACRA process can save 56.36 % of water and 47.78 % of heat energy comparing with acid-leaching method. All in all, this work provides a closed-loop strategy to separate and reutilize molten salt electrolytes for the MSCC-ET.
期刊介绍:
Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.