标題: An efficient ammonium chloride roasting approach to separating salt from the electrolytic carbon in molten carbonate

作者: Cheng, K (Cheng, Kang); Ma, YS (Ma, Yongsong); Zhao, MY (Zhao, Meiyu); Du, KF (Du, Kaifa); Yin, HY (Yin, Huayi); Wang, DH (Wang, Dihua)

來源出版物: SEPARATION AND PURIFICATION TECHNOLOGY 卷: 306 文獻号: 122681 DOI: 10.1016/j.seppur.2022.122681 子輯: B 出版年: FEB 15 2023

摘要: 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.

入藏号: WOS:000899388200002

語言: English

文獻類型: Article

作者關鍵詞: Molten carbonate; CO2 electrolysis; Carbon; Separation; Ammonium salt roasting

地址: [Cheng, Kang; Ma, Yongsong; Zhao, Meiyu; Du, Kaifa; Yin, Huayi; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.

[Cheng, Kang; Ma, Yongsong; Zhao, Meiyu; Du, Kaifa; Yin, Huayi; Wang, Dihua] Wuhan Univ, Int Cooperat Base Sustainable Utilizat Resources &, Wuhan 430072, Peoples R China.

[Ma, Yongsong; Wang, Dihua] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn Sc, Wuhan 430072, Peoples R China.

[Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

[Wang, Dihua] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn Sc, Wuhan 430072, Peoples R China.

通訊作者地址: Wang, DH (通訊作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

Wang, DH (通訊作者)，Wuhan Univ, State Key Lab Water Resources & Hydropower Engn Sc, Wuhan 430072, Peoples R China.

電子郵件地址: wangdh@whu.edu.cn

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