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Enhanced sequestration of CO2 from simulated electrolytic aluminum flue gas by modified red mud.
Wang, Xingyuan; Qi, Jiamin; Zhu, Hengxi; Wang, Jiancheng; Zeng, Heping; Li, Bin; Yan, Si.
Afiliación
  • Wang X; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China. Electronic address: 1103628520@qq.com.
  • Qi J; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China. Electronic address: 20212107029@stu.kust.edu.cn.
  • Zhu H; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China. Electronic address: 785563103@qq.com.
  • Wang J; . Binzhou Institute of Technology, Weiqiao-UCAs Science and Technology Park, BinzhouCity, Binzhou, 256606, China. Electronic address: 2924476016@qq.com.
  • Zeng H; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China. Electronic address: 394797848@qq.com.
  • Li B; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China; Low Carbon Technology Research Center, Kunming University of Science and Technology, Kunming, 650500, China. Electronic address: libin@kust.edu.cn.
  • Yan S; . Yunnan Environmental Science and Technology Development Co, LTD, Kunming, 650500, China. Electronic address: xh5189ys@163.com.
J Environ Manage ; 346: 118972, 2023 Nov 15.
Article en En | MEDLINE | ID: mdl-37716171
The aluminum industry is facing severe economic and environmental problems due to increasing carbon emissions and growing stockpiles of red mud (RM). RM is a strongly alkaline, high-emission solid waste from the alumina industry with potential for CO2 sequestration. However, the effectiveness of RM carbon sequestration is poor, and the mechanism behind it is not well understood. In this study, the effect of microwave and tube furnace activation of RM on CO2 sequestration in alumina was first investigated at different temperatures. The result showed that the CO2 sequestration capacity of unmodified RM (URM) was only 14.35 mg/g at ambient temperature and pressure, and the CO2 sequestration capacity could be increased to 52.89 mg/g after high-temperature activation and modification. Besides, high-temperature activation and modification will effectively improve the carbon sequestration capacity of RM. The carbonized RM was characterized by FT-IR, SEM, XRD, laser particle size, TG-DSC, and pH measurements. In addition, the mechanism of RM capturing CO2 was also proposed, which shows that CO2 was finally sequestered in the RM as CaCO3. The change in particle size distribution and the mineral phase in the RM indicated that high-temperature activation modification positively affects the application of RM to the sequestration of CO2. This study can provide a promising technology for the low-carbon and green development of the aluminum industry, as well as achieving the waste treatment and utilization objective.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Dióxido de Carbono / Aluminio Idioma: En Revista: J Environ Manage Año: 2023 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Dióxido de Carbono / Aluminio Idioma: En Revista: J Environ Manage Año: 2023 Tipo del documento: Article Pais de publicación: Reino Unido