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Energy effective utilization of circulating fluidized bed fly ash to prepare silicon-aluminum composite aerogel and gypsum.
Li, Jia-Yong; Tian, Bao-Hua; Li, Xin-Xin; Wang, Zhe; Cui, Li-Ping; Liang, Dan-Dan; Wang, Shuang-Lin; Liu, Yu-He; Ou, Heng-An; Liang, Hai-Xia.
Afiliación
  • Li JY; College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China.
  • Tian BH; College of Ecology, Taiyuan University of Technology, 79 West Street Yingze, Taiyuan, Shanxi 030024, China.
  • Li XX; College of Ecology, Taiyuan University of Technology, 79 West Street Yingze, Taiyuan, Shanxi 030024, China.
  • Wang Z; College of Safety and Emergency Management Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China.
  • Cui LP; College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China.
  • Liang DD; College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China.
  • Wang SL; College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China.
  • Liu YH; College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China.
  • Ou HA; College of Materials Science and Engineering, Taiyuan University of Technology, 79 West Street Yingze, Taiyuan, Shanxi 030024, China.
  • Liang HX; College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Ecology, Taiyuan University of Technology, 79 West Street Yingze, Taiyuan, Shanxi 030024, China. Electronic address: lianghaixia@tyut.edu.cn.
Waste Manag ; 172: 162-170, 2023 Dec 01.
Article en En | MEDLINE | ID: mdl-37918309
ABSTRACT
To reduce the cost of Si-Al aerogels preparation, circulating fluidized bed fly ash (CFA) was developed to be as the alternative to synthetic precursors. High energy consumption of alkali-melting and secondary wastes production were the major challenges. Here, a technique characterized by effective energy consumption and non-secondary waste was developed to convert CFA into Si-Al aerogel. The process consists two stages, preparation of Si-Al sol by sintering of CFA and Na2CO3 followed by sulfuric acid leaching, and synthesis of Si-Al aerogel by so-gel with trimethyl chlorosilane modification and ambient pressure drying. The optimization results of proportion and sintering temperature showed that the optimal temperature of sintering of Na2CO3 and CFA with the mass ratio of 0.7 was 750 °C, 100 °C lower than that of most other waste aluminosilicate materials. CaSO4·0.5H2O which meet building gypsum requirement was obtained by specifying the drying temperature of acid-leached residue at 126 °C for 2 h. The modification procedure was explored to obtain Si-Al aerogel with a large specific surface area of 857 m2/g and hydrophobic angle of 139.3°. Thermal and mechanical properties tests indicated that the Si-Al aerogels and gypsum produced from CFA exhibited promising thermal insulation and the potential application in construction.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Silicio / Ceniza del Carbón Idioma: En Revista: Waste Manag Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: China
Texto completo
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Imprimir
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Silicio / Ceniza del Carbón Idioma: En Revista: Waste Manag Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: China