Transformation of Gibbsite to Boehmite in Caustic Aqueous Solution at Hydrothermal Conditions
文献类型：期刊论文
| 作者 | Zhang, Xin2; Cui, Wenwen1,2,5; Hu, Jian Zhi2; Wang, Hsiu-Wen3; Prange, Micah P.2; Wan, Chuan2; Jaegers, Nicholas R.2; Zong, Meirong2,4; Zhang, Hailin1,2,5; Pearce, Carolyn, I2 |
| 刊名 | CRYSTAL GROWTH & DESIGN
 |
| 出版日期 | 2019-10-01 |
| 卷号 | 19期号:10页码:5557-5567 |
| ISSN号 | 1528-7483 |
| DOI | 10.1021/acs.cgd.9b00468 |
| 英文摘要 | Phase transformations among aluminum (oxyhydr)oxide minerals play important roles across a wide range of natural and industrial settings. In highly caustic aqueous solutions, uncertainty persists regarding whether solid-state or dissolution-reprecipitation pathways dominate. We explored the transformation of gibbsite [alpha-Al(OH)(3)] to boehmite (gamma-AlOOH) in caustic NaOH solution at hydrothermal conditions as a function of temperature, Al(III) and NaOH concentrations, and reaction time. Comparison of detailed structural and morphological solids characterization by X-ray diffraction, scanning electron microscopy/transmission electron microscopy, atomic force microscopy, Raman spectroscopy, and high-field Al-27 MAS NMR to predictions from equilibrium thermodynamics calculations suggests the critical importance of dissolution-reprecipitation across our range of system conditions. The yield and physical properties of the boehmite product were found to be sensitive to the hydrothermal treatment temperature and the Al/OH- ratio, controlled by the loading of gibbsite with respect to NaOH. Experiments at lower Al/OH- ratios (e.g., 0.64) indicate that the dissolution of the gibbsite reaches an aqueous aluminate saturation state sufficient to overcome the nucleation barrier for boehmite. Higher Al/OH- ratios (e.g., 3.2) are found to slow the phase transformation, leaving residual unreacted gibbsite in the final product. Higher temperatures appear to improve the phase transformation rate but also typically yield smaller-sized boehmite particles. Particle morphological analyses compared to thermodynamic expectations suggest an important role of kinetics at mineral/solution interfaces, both in the gibbsite dissolution rate as well as the growth rate of boehmite nanocrystals. |
| WOS关键词 | HIGH-TEMPERATURE SOLUBILITY ; IONIC-STRENGTH ; ALUMINATE SOLUTIONS ; GAMMA-ALUMINA ; GROWTH ; PRECIPITATION ; TRANSITIONS ; PARTICLES ; STABILITY ; BAYERITE |
| 资助项目 | IDREAM (Interfacial Dynamics in Radiation Environments and Materials), an Energy Frontier Research Center - U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) ; DOE Office of Biological and Environmental Research ; DOE[DE-AC05-76RL01830] |
| WOS研究方向 | Chemistry ; Crystallography ; Materials Science |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000489001700016 |
| 资助机构 | IDREAM (Interfacial Dynamics in Radiation Environments and Materials), an Energy Frontier Research Center - U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) ; DOE Office of Biological and Environmental Research ; DOE |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/31117]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Zhang, Xin; Rosso, Kevin M. |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Pacific Northwest Natl Lab, Richland, WA 99352 USA 3.Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA 4.Nanjing Univ, Sch Earth Sci & Engn, Nanjing, Jiangsu, Peoples R China 5.Chinese Acad Sci, Inst Proc Engn, Beijing, Peoples R China 6.Washington State Univ, Dept Chem, Pullman, WA 99164 USA |
| 推荐引用方式 GB/T 7714 | Zhang, Xin,Cui, Wenwen,Hu, Jian Zhi,et al. Transformation of Gibbsite to Boehmite in Caustic Aqueous Solution at Hydrothermal Conditions[J]. CRYSTAL GROWTH & DESIGN,2019,19(10):5557-5567. |
| APA | Zhang, Xin.,Cui, Wenwen.,Hu, Jian Zhi.,Wang, Hsiu-Wen.,Prange, Micah P..,...&Rosso, Kevin M..(2019).Transformation of Gibbsite to Boehmite in Caustic Aqueous Solution at Hydrothermal Conditions.CRYSTAL GROWTH & DESIGN,19(10),5557-5567. |
| MLA | Zhang, Xin,et al."Transformation of Gibbsite to Boehmite in Caustic Aqueous Solution at Hydrothermal Conditions".CRYSTAL GROWTH & DESIGN 19.10(2019):5557-5567. |
入库方式： OAI收割
来源：过程工程研究所
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