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Investigation on the Value-Added Production of Silicon Dioxide and Synthesizing Zeolites as well as Extraction of Rare Earth Elements from Fly Ash

文献类型：期刊论文

作者Sun, Zhe1,2; Li, Heyu2,3,4; Tao, Zuimiao1,2; Wang, Baochuan5; Gao, Lei6; Xu, Yusheng6; Cao, Yan1,2,3,4,5
刊名APPLIED SCIENCES-BASEL
出版日期2023-06-01
卷号13期号:12页码:14
关键词CFA rare earth elements precipitated silica zeolites high value
DOI10.3390/app13127250
通讯作者Cao, Yan(caoyan@ms.giec.ac.cn)
英文摘要Coal fly ash is one of the most promising secondary sources for extracting high value-added rare earth elements. Nevertheless, the majority of rare earth elements in coal fly ash are associated with the aluminosilicate glassy phase, hindering their solubility during the acid leaching process and resulting in the traditional rare earth elements extraction method, which is unavoidably complex in operation and poor in the economy. In this study, prior to the conventional acid leaching, the realization of the coal fly ash activation was considered. This consisted of two steps involving the coal fly ash calcination at the elevated temperatures using recyclable Na2CO3 and the water and alkali washing. It helped in developing the pore structures in coal fly ash, facilitating the leaching solution to rare earth elements, and reducing the acid consumption of rare earth elements leaching. Simultaneously, the generated aqueous solutions could precipitate two new valuable products, the purified silica oxide powder (257.58 g & BULL;kg(-1), 338.1 m(2)& BULL;g(-1) BET, 40 nm grain size, 93.43% purity) and porous zeolites (410.3 g & BULL;kg(-1)). The residual rare earth elements in the pretreated solid residue can be easily extracted, with an extraction efficiency of 91.24% and an acid saving rate of 74.5%. Therefore, a multiple of value-added products can be obtained by this new extraction method with great economic significance.
WOS关键词HEAVY-METALS ; COAL ; RECOVERY ; TRANSFORMATION ; SLUDGE
资助项目National Natural Science Foundation of China[22178339] ; Innovation-driven Development Special Foundation of Guangxi Province ; University Science Research Project of Anhui Province[2022AH050076] ; Hundred Talents Program (A) of the Chinese Academy of Sciences ; Polygeneration Cycle Coupling Coal-based Hydrogen Production Project of Shanxi Science and Technology Research Institute of Jinneng Holding Group
WOS研究方向Chemistry ; Engineering ; Materials Science ; Physics
语种英语
WOS记录号WOS:001016945100001
出版者MDPI
资助机构National Natural Science Foundation of China ; Innovation-driven Development Special Foundation of Guangxi Province ; University Science Research Project of Anhui Province ; Hundred Talents Program (A) of the Chinese Academy of Sciences ; Polygeneration Cycle Coupling Coal-based Hydrogen Production Project of Shanxi Science and Technology Research Institute of Jinneng Holding Group
源URL[http://ir.giec.ac.cn/handle/344007/39525]  
专题中国科学院广州能源研究所
通讯作者Cao, Yan
作者单位1.Anhui Univ, Anhui Prov Key Lab Chem Inorgan Organ Hybrid Funct, Hefei 230601, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
3.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
5.Huainan Dongchen Grp Co Ltd, Huainan 232038, Peoples R China
6.Shanxi Sci & Technol Res Inst Jinneng Holding Grp, Taiyuan 030032, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Zhe,Li, Heyu,Tao, Zuimiao,et al. Investigation on the Value-Added Production of Silicon Dioxide and Synthesizing Zeolites as well as Extraction of Rare Earth Elements from Fly Ash[J]. APPLIED SCIENCES-BASEL,2023,13(12):14.
APA Sun, Zhe.,Li, Heyu.,Tao, Zuimiao.,Wang, Baochuan.,Gao, Lei.,...&Cao, Yan.(2023).Investigation on the Value-Added Production of Silicon Dioxide and Synthesizing Zeolites as well as Extraction of Rare Earth Elements from Fly Ash.APPLIED SCIENCES-BASEL,13(12),14.
MLA Sun, Zhe,et al."Investigation on the Value-Added Production of Silicon Dioxide and Synthesizing Zeolites as well as Extraction of Rare Earth Elements from Fly Ash".APPLIED SCIENCES-BASEL 13.12(2023):14.

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来源：广州能源研究所

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