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Investigation of solution chemistry to enable efficient lithium recovery from low-concentration lithium-containing wastewater

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Frontiers of Chemical Science and engineering 2020年第4期14卷 639-650页

作者： Chunlong Zhao Mingming He Hongbin Cao Xiaohong Zheng Wenfang Gao Yong Sun He Zhao Dalong Liu Yanling Zhang Zhi Sun State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Beijing Engineering Research Center of Process Pollution Control Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Nottingham Ningbo China Ningbo 315100China Henan Bingsheng Biotechnology Company Limited Kaifeng 475103China

In the production of lithium-ion batteries(LIBs)and recycling of spent LIBs,a large amount of low-concentration lithium-containing wastewater(LCW)is *** recovery of Li from this medium has attracted significant global attention from both the environmental and economic *** achieve effective Li recycling,the features of impurity removal and the interactions among different ions must be ***,it is generally dificult to ensure highly efficient removal of impurity ions while retaining Li in the solution for further *** this study,the removal of typical impurity ions from LCW and the interactions between these species were systematically investigated from the thermodynamic and kinetics *** was found that the main impurities(e.g.,Fe^+,AIP^+,Ca^2+,and Mg^2+)could be efficiently removed with high Li recovery by control-ling the ionic strength of the *** mechanisms of Fe^3+,Al^+,Ca^2+,and Mg^2+removal were investigated to identify the controlling steps and reaction *** was found that the precipitates are formed by a zero-order reaction,and the activation energies tend to be low with a sequence of fast chemical reactions that reach equilibrium very ***,this study focused on Li loss during removal of the impurities,and the corresponding removal rates of Fe^+,Al^+,Ca^2+,and Mg^2+were found to be 99.8%,99.5%,99%,and 99.7%,***-quently,high-purity LisPO4 was obtained via one-step ***,this research demonstrates a potential route for the effective recovery of Li from low-concentra-tion LCW and for the appropriate treatment of acidic LCW.

关键词： lithium-containing wastewater lithium phos-phate precipitation impurity ion

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A new method of Ionic Fragment Contribution-Gradient Boosting Regressor for predicting the infinite dilution activity coefficient of dichloromethane in ionic liquids

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Fluid Phase Equilibria 2023年 564卷

作者： Li, Kaikai Chang, Fei Shi, Sensen Jiang, Chongyang Bai, Yinge Dong, Haifeng Meng, Xianghai Wu, Jeffery C.S. Zhang, Xiangping CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex System Beijing Key Laboratory of Ionic Liquids Clean Process Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China College of Chemical and Engineering University of Chinese Academy of Sciences Beijing 100049 China College of Chemical Engineering and Environment China University of Petroleum Beijing 102249 China Langfang Green Industrial Technology Center Langfang06500 China Department of Chemical and Engineering National Taiwan University Taipei10617 Taiwan

Ionic liquids (ILs) have shown huge potential advantages as solvents to absorb and recover dichloromethane (DCM) from waste gasses. The infinite dilution activity coefficient (γ∞) of DCM in ILs is an important parameter, which can be used to predict the vapor-liquid equilibrium of DCM-IL systems. In this work, a new model of calculating the γ∞ of DCM in ILs is established based on ionic fragments contribution (IFC) and gradient boosting regressor (GBR) algorithm. IFC is used to obtain the surface charge density distribution area of ILs (Sσ-profile) that is the input of GBR. GBR is used to learn the mapping relationship between input feature and γ∞ of DCM in ILs. The database of the γ∞ of DCM in ILs composed of 29 cations and 22 anions includes 72 experimental data and 421 COSMO calculation data, which was employed to establish the IFC-GBR model and predict the γ∞ of DCM in ILs. The coefficient of determination (R2) and mean absolute error (MAE) of the IFC-GBR model test set are 0.9703 and 0.0519, respectively. Also, this model has excellent generalization capability of predicting evidenced by high 10-fold cross-validation coefficients of determination in the range 0.9474–0.9481. These results indicate that the proposed model can accurately predict γ∞ of DCM in ILs, then provide the important data for developing a new process of absorbing and desorbing DCM by IL-based technologies. © 2022

关键词： Ionic liquids

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Influence of 3d Pores in Ceramics Layer on the Tgo Failure Mechanism of Thermal Barrier Coatings

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SSRN 2023年

作者： Yang, Ming Wang, Xueying Feng, Wei Fu, Yongjun Jiang, Yufeng Chen, Feng Li, Ming Chen, Yue School of Materials Science and Engineering Hubei Polytechnic University Hubei435003 China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Yttria partially stabilized zirconia sprayed by the air-plasma-spraying method is widely used to protect superalloy substrates due to its unique thermomechanical properties, but the formation and development of thermally grown oxide (TGO) often causes crack propagation in thermal barrier coatings and leads to accidents. In this paper, the effects of the thickness of the TGO layer and the porosity on the heat insulation properties and surface residual stress between the ceramic layer and TGO layer of TBCs fabricated by atmospheric plasma spraying were studied. Finite element calculations are used to study the thickness of TGO layers with different porosities after thermal shock, the thermal insulation performance of coatings at high temperature and the three-dimensional distribution of thermal strain, especially at the interface between the lower ceramic layer and upper TGO layer. The results show that when the porosity of the ceramic coating is approximately 24.35%, the thermal insulation performance and the maximum von Mises stress of the coating are optimized, and the coating has the longest service life. Theoretically, this paper is of great significance in revealing the influence of porosity control on the service life of the coating. © 2023, The Authors. All rights reserved.

关键词： Porosity

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Dechlorination of waste polyvinyl chloride (PVC) through non-thermal plasma

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Chemosphere 2023年第1期338卷 139535页

作者： Song, Jiaxing Wang, Jun Sima, Jingyuan Zhu, Youqi Du, Xudong Williams, Paul T. Huang, Qunxing State Key Laboratory of Clean Energy Utilization Institute for Thermal Power Engineering Zhejiang University Hangzhou310027 China School of Chemical and Process Engineering University of Leeds LeedsLS2 9JT United Kingdom

Dechlorination is essential for the chemical recycling of waste polyvinyl chloride (PVC) plastics. This study investigated the use of non-thermal plasma (NTP) for chlorine removal, with a focus on the effects of treatment time and discharge power on dechlorination efficiency. The results showed that longer treatment times and higher discharge powers led to better dechlorination performance. The maximum efficiency (98.25%) and HCl recovery yield (55.72%) were achieved at 180 W power after 40 min of treatment where 96.44% of Cl existed in the form of HCl gas, 1.44% in the liquid product, and 2.12% in the solid residue product. NTP at a discharge power of 150 W showed better dechlorination performance compared to traditional thermal pyrolysis treatment in temperatures ranging from 200 to 400 °C. The activation energy analysis of the chlorine removal showed that compared to pyrolysis-based dechlorination (137.09 kJ/mol), NTP-based dechlorination (23.62 kJ/mol) was more easily achievable. This work presents a practical method for the dechlorination of waste PVC plastic using a novel technology without requiring additional thermal and pressure input. © 2023

关键词： Dechlorination

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Controllable Synthesis of Hollow Multishell Structured Co3O4 with Improved Rate Performance and Cyclic Stability for Supercapacitors

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Chemical Research in Chinese Universities 2020年第1期36卷 68-73页

作者： WANG Cong WANG Jiangyan HU Wenping WANG Dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Department of Chemistry School of Science&Collaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300072P.R.China

Hollow multishelled structures(HoMSs)Co3O4 with specially appointed shell number(double-,triple-and quadruple-)were accurately prepared by a sequential templating *** to the superiorities of inimitable porous multishelled structure,triple-HoMSs Co3O4 achieved the best performance among all the samples with a specific capacitance of 1028.9 F/g at 10 mV/s and 688.2 F/g at 0.5 A/g,***,the electrode delivered a high rate performance(89.8%retention at 10 A/g)and excellent cycle stability(6.8%loss over 2000 cycles),showing a great promise for practical application in the future.

关键词： Hollow multishelled structure Cobalt oxide Supercapacitor

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Highly Efficient and Economical One-Pot Two-Step Multienzymatic Synthesis of 6′/3′-Sialyllactosamine from In Situ-Produced N-Acetyllactosamine

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Journal of Agricultural and Food Chemistry 2025年第23期73卷 14444-14452页

作者： Jiao, Runmiao Peng, Xinlv Wang, Bing Du, Yuguang Qian, Eika W. Li, Jianjun Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and Technology Nakacho 2-24-16 Koganei Tokyo1848588 Japan State Key Laboratory of Biopharmaceutical Preparation and Delivery Institue of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Innovation Academy for Green Manufacture Institute Institue of Process Engineering Chinese Academy of Sciences Beijing100190 China Gulbali Institute for Agriculture Water and Environment Charles Sturt University Wagga WaggaNSW2678 Australia

Among over 200 human milk oligosaccharides, 6′-SLN (6′-sialyl-N-acetyllactosamine) and 3′-SLN possess potential antiviral function and can potentially enhance brain development and knowledge. So far, no efficient and cost-effective synthetic pathways for 6′-SLN and 3′-SLN have been developed. In this study, efficient enzymatic pathways to synthesize 6′-SLN and 3′-SLN were established involving economic cytidine 5′-triphosphate (CTP) regeneration from commercial N-acetyllactosamine (LacNAc) with yields of >95%. To meet the requirement of industrial production, their synthesis was further optimized starting from in situ-produced LacNAc. Consequently, the cost of LacNAc purification could be saved. Furthermore, conducting synthesis at pH 7.0 and with supplementation of polyP6 in three batches led to yields of 6′-SLN (95.0%) and 3′-SLN (94.8%), respectively. Under optimized conditions, enzymatic syntheses of 6′-SLN and 3′-SLN were conducted at a 5 L scale with yields of 96.1% (259.2 g) and 92.3% (248.7 g), respectively. This study would lay the foundation for industrial production of 3′-SLN and 6′-SLN in the future and provide a guide for multienzymatic preparation of other sialylated oligosaccharides. © 2025 American Chemical Society.

关键词： Synthesis (chemical)

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Numerical Modeling of the Evolution Characteristics of Coarse Ash Particles in the Co-Incineration process of Sludge and Msw

SSRN

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SSRN 2023年

作者： Zhu, Runru Wang, Xiang Huang, Yun State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China

This paper aims to report the evolution characteristics of the coarse ash particles generated from the co-incineration of municipal solid waste with other wastes, e.g. sewage sludge, to suggest suitable operational strategies to handle the side effects. By using an evolution model which addresses the mechanism of char combustion, volatile-induced fragmentation, and the transformation of included and excluded minerals particles, the coarse ash particle evolution process in the waste incinerator is successfully predicted. By comparing with in-situ measurement data of a 200t/d forward grate MSW incinerator, the predicted total particle concentration is 275.7 mg/Nm3, and the relative difference is about 4.2%. Although the variation in flue gas parameters has little effect on the distribution characteristics of coarse ash particles from MSWI, the carbon content of coarse ash particles is more sensitive to flue parameter change. Due to the tight relationship between the PCDD/Fs and the carbon content of ash particles under the mechanism of the de novo process, the increase in carbon concentration caused by the co-incineration of low-calorific value waste will increase the probability of the dioxins formation. © 2023, The Authors. All rights reserved.

关键词： Sewage sludge

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A Novel Heterogeneous Continuum Model for Gas-Solid Fluidization: Dynamic Emms Evolution Model

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SSRN 2023年

作者： Zhang, Huahai Wang, Limin State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China

Traditional gas-solid continuum model is still computationally inaccurate and physically unreasonable due to homogeneous assumption that particles uniformly dispersed in computational grid. Here, a novel heterogeneous continuum model, named dynamic EMMS evolution model, was developed for accurate and fast simulations of gas-solid fluidization systems. In this model, the evolution of gas-solid heterogeneous multiscale structure in each computational grid was directly resolved by energy-minimization multi-scale (EMMS) model, which was then coupled with multiphase mixture model to dynamically calculate phase holdup and flow field. Both S-shaped axial voidage profiles and spatial distribution of solid phase appears with the presence of a core-annulus structure were successfully captured. Compared with two-fluid model, dynamic EMMS evolution model predicted axial voidage profiles more agreeable with experimental data, owned stronger computational stability, and increased computing speed by 245 times. Based on dynamic EMMS evolution model, a novel heterogeneous continuum evolution model for fast and reliable simulations of complex heterogeneous multiscale gas-solid fluidization system was established. © 2023, The Authors. All rights reserved.

关键词： Gases

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Detailed Numerical Simulation of Swirling Jet Atomization in Crossflow

SSRN

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SSRN 2023年

作者： Fu, Yueyao Zheng, Shuihua Chai, Min Institute of Process Equipment and Control Engineering College of Mechanical Engineering Zhejiang University of Technology Hangzhou310023 China State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou310027 China

The jet in crossflow (JICF) has attracted broad interest due to its potential as a highly effective atomization method. Swirling JICF in particular has shown promise in enhancing this advantage, but research in this area is still in its initial stages. The spray performance of the swirling jet remains to be determined. In this paper, we study the primary atomization characteristics of the swirling jet injected into a gaseous crossflow using direct numerical simulations (DNS). The Volume-of-fluid (VOF) method captures the interface with the AMR method for high grid resolution. Under identical working condition, the swirling and cylindrical jets show significant differences in penetration depth. The windward side of the swirling liquid film develops a structure similar to the palm skeleton due to Rayleigh-Taylor (RT) instability and a thread structure of the liquid surface due to the Kelvin-Helmholtz (KH) instability. Additionally, the windward surface of the swirling jet is dominated by RT instability, while the cylindrical jet is dominated by KH instability. The formation of the leeward bag structure of the swirling jet is due to the interaction between the vortex and interface. The leeward droplets are formed by the breakup of the liquid film bag, and the windward palm structure surface shedding forms droplets. Based on this, the relationship between velocity gradient invariants is used to explore the topology and geometry of the flow field structure. The probability density function (PDF) of the droplet size of the swirling jet shows a normal distribution in the steady state and the nonlinear relationship between velocity and particle size. Furthermore, we compare the results of the cylindrical jet under identical conditions, and find that the swirling jet has greater advantages in achieving rapid atomization. © 2023, The Authors. All rights reserved.

关键词： Jets

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FedAWS: A Federated Tuning Approach with Adaptive Weight Shrinking for Pre-trained Foundation Models

FedAWS: A Federated Tuning Approach with Adaptive Weight Shr...

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Data Driven Control and Learning Systems (DDCLS)

作者： Yubin Cheng Zhihuan Song Xiaoyu Jiang Le Yao State Key Laboratory of Industrial Control Technology Institute of Industrial Process Control College of Control Science and Engineering Zhejiang University Hangzhou China School of Mathematics Hangzhou Normal University Hangzhou China

ISBN: (数字)9798350361674

ISBN: (纸本)9798350361681

In recent years, pre-trained foundation models have developed rapidly and have been applied to various downstream tasks through fine-tuning methods. However, due to the existence of data silos, the lack of data for fine-tuning has become a vital issue preventing the application of the foundation model to industry. In addition, the high complexity of the network makes the foundation model prone to overfitting when used for data-constrained industrial tasks. Therefore, a federated tuning approach with adaptive weight shrinking, named FedAWS, is proposed for collaborative fine-tuning between factories. FedAWS adaptively selects the weight-shrinking factor to reduce overfitting and improve the generalization of the global model without relying on additional data sets or human experience. The case study on an industrial dataset demonstrates the effectiveness of FedAWS. This successful validation provides a new way for inter-factory collaboration to apply the foundation model to industry, thus facilitating the efficient utilization of industrial data.

关键词： Industries Learning systems Adaptation models Collaboration Control systems Data models Production facilities

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