Preparation of alpha-High-Strength Hemihydrate from Flue Gas Desulfurization Gypsum in AlCl3-MgCl2 Solution at Atmospheric Pressure
文献类型：期刊论文
| 作者 | Liu, Shuaifeng1,2; Asselin, Edouard3; Li, Zhibao1 |
| 刊名 | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
 |
| 出版日期 | 2022-09-21 |
| 卷号 | 61期号:37页码:14110-14120 |
| ISSN号 | 0888-5885 |
| DOI | 10.1021/acs.iecr.2c02280 |
| 英文摘要 | An industrially feasible process was proposed to produce alpha-calcium sulfate hemihydrate (alpha-HH) from FGD gypsum without any additives. In this process, an AlCl3 solution was used to promote the conversion of calcium sulfate dihydrate (DH) to hexagonal prismatic alpha-HH with high strength at atmospheric pressure. The phase transition kinetics of FGD gypsum was experimentally investigated under conditions: AlCl3 (2-2.5 m), MgCl2 (0-0.4 m) existing in raw FGD gypsum, and the solid-liquid ratio (or solid content %) range of 0.1-2 at 363 K. It was found that increasing the concentrations of MgCl2 in AlCl3 solution accelerated the conversion. The uniform large hexagonal prism HH product was obtained at the folowing optimal conditions: 2.5 mol/kg AlCl3, 0.4 mol/kg MgCl2, solid-liquid ratio of 2, and equilibration time of 2 h at 363 K. The phase diagram of the AlCl3-MgCl2-H2O system was determined by measuring solubility of solids. The E-NRTL activity model was used to construct the phase transition diagram of CaSO4 in AlCl3-MgCl2 media and to judge the stable range of DH and HH. |
| WOS关键词 | CALCIUM-SULFATE DIHYDRATE ; CRYSTALLIZATION KINETICS ; HCL-CACL2-H2O SYSTEM ; MODEL ; TRANSFORMATION ; CASO4 |
| 资助项目 | National Natural Science Foundation of China[21978290] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000858566000001 |
| 出版者 | AMER CHEMICAL SOC |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/54832]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Li, Zhibao |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 3.Univ British Columbia, Dept Mat Engn, Vancouver, BC V6T 1Z4, Canada |
| 推荐引用方式 GB/T 7714 | Liu, Shuaifeng,Asselin, Edouard,Li, Zhibao. Preparation of alpha-High-Strength Hemihydrate from Flue Gas Desulfurization Gypsum in AlCl3-MgCl2 Solution at Atmospheric Pressure[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2022,61(37):14110-14120. |
| APA | Liu, Shuaifeng,Asselin, Edouard,&Li, Zhibao.(2022).Preparation of alpha-High-Strength Hemihydrate from Flue Gas Desulfurization Gypsum in AlCl3-MgCl2 Solution at Atmospheric Pressure.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,61(37),14110-14120. |
| MLA | Liu, Shuaifeng,et al."Preparation of alpha-High-Strength Hemihydrate from Flue Gas Desulfurization Gypsum in AlCl3-MgCl2 Solution at Atmospheric Pressure".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 61.37(2022):14110-14120. |
入库方式： OAI收割
来源：过程工程研究所
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