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Start Over Author "Hu, Yuehua" Publisher american chemical society (acs)
20 results on '"Hu, Yuehua"'

3. Recovering Valuable Metals from Spent Lithium Ion Battery via a Combination of Reduction Thermal Treatment and Facile Acid Leaching

Author

Bu Yongjie, Zhang Chenyang, Sun Wei, Yang Yue, Song Shaole, and Hu Yuehua

Subjects
Materials science, Renewable Energy, Sustainability and the Environment, General Chemical Engineering, Inorganic chemistry, 02 engineering and technology, General Chemistry, Thermal treatment, 010501 environmental sciences, 021001 nanoscience & nanotechnology, 01 natural sciences, Lithium-ion battery, Thermogravimetry, X-ray photoelectron spectroscopy, Differential thermal analysis, Scientific method, Environmental Chemistry, Graphite, 0210 nano-technology, Powder diffraction, 0105 earth and related environmental sciences
Abstract

The traditional acid leaching process for releasing valuable metals from spent lithium-ion batteries (LIBs) is inefficient and inevitably consumes large amounts of reductants. In this study, a novel process, based on a reduction thermal treatment and reductant-free acid leaching, for recycling valuable metals from spent LIBs has been developed. First, a thermodynamics calculation was performed to judge whether the reducing reaction between LiCoO2 and graphite can occur or not. Then, reduction thermal treatment experiments were conducted. The process was tested by a thermogravimetry/differential thermal analysis method, and reaction products were measured by X-ray powder diffraction and X-ray photoelectron spectroscopy. The experimental results agree well with thermodynamics analysis, and the desired CoO and Li2CO3 were obtained under the optimum processing conditions of 600 °C, 120 min, and molar ratio of LiCoO2 to graphite of 2:1. Finally, almost 100% Li and Co were easily leached from the reaction produ...

Published
2018

8. Molecular-Level CuS@S Hybrid Nanosheets Constructed by Mineral Chemistry for Energy Storage Systems

Author

Li, Sijie, primary, Ge, Peng, additional, Jiang, Feng, additional, Foster, Christopher W., additional, Banks, Craig E., additional, Xu, Wei, additional, Zhang, Yu, additional, Hong, Wanwan, additional, Zhang, Chenyang, additional, Sun, Wei, additional, Hu, Jiugang, additional, Hou, Hongshuai, additional, Hu, Yuehua, additional, and Ji, Xiaobo, additional

Published
2018
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17. Solution Chemistry Study of Salt-type Mineral Flotation Systems: Role of Inorganic Dispersants

Author

and Ruan Chi, Hu Yuehua, and Zhenghe Xu

Subjects
Calcite, chemistry.chemical_classification, Mineral, General Chemical Engineering, Inorganic chemistry, Salt (chemistry), General Chemistry, Solubility equilibrium, Phosphate, Industrial and Manufacturing Engineering, Silicate, Apatite, chemistry.chemical_compound, chemistry, visual_art, Calcium silicate, visual_art.visual_art_medium
Abstract

Interactions of salt-type minerals with common inorganic flotation depressants were investigated through solution chemistry calculations. From the constructed conditional solubility product limits and the actual solubility product lines of calcium silicate and phosphate in fluorite, calcite, and apatite single-mineral systems, the critical precipitation pH or concentration of silicate and phosphate in the corresponding mineral suspensions was determined. These values provided a fundamental basis for interpreting the results of flotation tests and were in line with the results of ζ-potential and dispersant adsorption measurements. The surface precipitation of calcium silicate or phosphate on fluorite and calcite was identified as a major depression mechanism. Selective depressing conditions for different salt-type minerals using Na2SiO3 and Na3PO4 as depressants were determined on the basis of solution chemistry calculations of the systems.

Published
2003

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