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study on metal recovery process and kinetics of oxidative leaching from spent LiFePO_(4)Li-batteries

Chinese Journal of Chemical Engineering 2024年第4期68卷 94-102页

作者： Xiaoming Zhang Wen Xie Xiaolei Zhou Wenjie Zhang Jiawei Wen Xin Wang Guoyong Huang Shengming Xu College of New Energy and Materials China University of PetroleumBeijing 102249China State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of PetroleumBeijing 102249China Beijing Spacecrafts Beijing 100094China Ganfeng Lithium Group Co. Ltd.Xinyu 338000China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Fine Ceramics Tsinghua UniversityBeijing 100084China

A green environmental protection and enhanced leaching process was proposed to recover all elements from spent lithium iron phosphate(LiFePO_(4)) lithium batteries.In order to reduce the influence of Al impurity in the recovery process,NaOH was used to remove impurity.After impurity removal,the spent LiFePO_(4) cathode material was used as raw material under the H_(2)SO_(4) system,and the pressure oxidation leaching process was adopted to achieve the preferential leaching of lithium.The E-pH diagram of the Fe-P-Al-H_(2)O system can determine the stable region of each element in the recovery process of spent LiFePO_(4)Li-batteries.Under the optimal conditions(500 r·min^(-1),15 h,363.15 K,0.4 MPa,the liquid-solid ratio was 4:1 ml·g^(-1)and the acid-material ratio was 0.29),the leaching rate of Li was 99.24%,Fe,Al,and Ti were 0.10%,2.07%,and 0.03%,respectively.The Fe and P were precipitated and recovered as FePO_(4)·2H_(2)O.The kinetic analysis shows that the process of high-pressure acid leaching of spent LiFePO_(4) materials depends on the surface chemical reaction.Through the life cycle assessment(LCA)of the spent LiFePO_(4) whole recovery process,eight midpoint impact categories were selected to assess the impact of recovery process.The results can provide basic environmental information on production process for recycling industry.

关键词： Spent LiFePO_(4)Li-batteries Oxidative leaching kinetic study Life cycle assessment

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kinetic study OF CARBONYLATION OF METHANOL TO ACETIC ACID AND ACETIC ANHYDRIDE OVER A NOVEL COPOLYMER-BOUND CIS-DICARBONYLRHODIUM COMPLEX

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Chinese Journal of Polymer Science 1989年第3期7卷 225-231页

作者：陈予英袁国卿陈荣耀 Institute of Chemistry Academia Sinica Beijing

The kinetic study of carbonylation of methanol-acetic acid mixture to acetic acid and acetic anhydride over a cis-dicarbonylrhodium complex (MVM' Rh) coordinated with the ethylene diacrylate (M') crosslinked copolymer of methyl acrylate (M) and 2-vinylpyddine (V)shows that the rate of reaction is zero order with respect to both reactants methanol and carbon monoxide, but first order in the concentrations of promoter methyl iodide and rhodium in the complex. Polar solvents can accelerate the reaction. Activation parameters were calculated from the experimental results, being comparable to that of the homogeneous system. A mechanism similar to that of soluble rhodium catalyst was proposed.

关键词： Carbonylation of methanol Copolymer-bound cis-dicarbonylrhodium complex kinetic study

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Simultaneous removal of NO_(x)and chlorobenzene on V_(2)O_(5)/TiO_(2)granular catalyst:kinetic study and performance prediction

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Frontiers of Environmental Science & Engineering 2021年第4期15卷 263-272页

作者： Lina Gan Kezhi Li Hejingying Niu Yue Peng Jianjun Chen Yuandong Huang Junhua Li School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai200093China Institute of Engineering Technology Sinopec Catalyst Co.Ltd.Beijing101111China School of Environmental&Chemical Engineering Shanghai UniversityShanghai200444China School of Environment Tsinghua UniversityBeijing100084China

The synergetic abatement of multi-pollutants is one of the development trends of flue gas pollution control technology,which is still in the initial stage and facing many challenges.We developed a V_(2)O_(5)/TiO_(2)granular catalyst and established the kinetic model for the simultaneous removal of NO and chlorobenzene(i.e.,an important precursor of dioxins).The granular catalyst synthesized using vanadyl acetylacetonate precursor showed good synergistic catalytic performance and stability.Although the SCR reaction of NO and the oxidation reaction of chlorobenzene mutually inhibited,the reaction order of each reaction was not considerably affected,and the pseudo-first-order reaction kinetics was still followed.The performance prediction of this work is of much value to the understanding and reasonable design of a catalytic system for multi-pollutants(i.e.,NO and dioxins)emission control.

关键词： NO_(x)Chlorobenzene Simultaneous removal kinetic study Performance prediction V_(2)O_(5)/TiO_(2)

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A kinetic study of the electron-transfer in the reaction of tribenzylchlorotin with[CoW_(12)O_(40)]^(5-)

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Chinese Chemical Letters 2009年第8期20卷 1005-1009页

作者： Fatemeh F.Bamoharram Mohammad M.Heravi Touran Ardalan Pouran Ardalan Department of Chemistry Islamic Azad UniversityMashhad BranchMashhadIran Young Researchers Club Islamic Azad UniversityMashhad BranchMashhadIran

A kinetic study of the electron-transfer in the reaction of tribenzylchlorotin with potassium 12-tungsto cobalt （Ⅲ） ate ion, Ks[CoW12O40], abbreviated as Co（III）W, has been performed in different solvents. The studies were carried out in methanol, ethanol, acetonitrile and acetic acid/water. The rate constants, reaction rates and activation parameters were calculated. Our findings show that the rate of disappearance of the Co（Ⅲ） is pseudo-first order. The kinetic data is strongly affected by used solvents. The maximum and minimum rate constants were achieved in the ethanol and acetic acid/water （70/30） as a solvent, respectively. In all of the used solvents, negative value of activation entropies was observed, but negative activation enthalpies are observed in methanol, ethanol and acetonitrile. The reaction rate is increased with increase of Co（Ⅲ） concentration. ？2009 Fatemeh E Bamoharram. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： kinetic study Potassium 12-tungsto cobalt (III) ate ion Pseudo-first order Keggin

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kinetic study of MOCVD Ⅲ-Ⅴ Quaternary Antimonides

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Rare Metals 1999年第1期18卷 17-21页

作者：彭瑞伍韦光宇吴伟王占国

The kinetics of MOCVD GaInAsSb and AlGaAsSb was studied by the growth rate as a function of growth temperature and partial pressure of Ⅲ and Ⅴ MO species. The diffusion theory was used to explain the mass transport processes in MOCVD Ⅲ Ⅴ quaternary antimonides. On the basis of the discussion about their growth kinetics and epilayer properties, the good quality multi epilayers of these two quaternary antimonides and their photodetectors and arrays with wavelength of 1.8～2.3 μm and detectivities of D *>10 9 cm Hz 1/2 W -1 were obtained.

关键词： kinetic study MOCVD Ⅲ Ⅴ Quaternary antimonide Photodetector

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Thermal Decomposition Behavior and kinetic study of Jamadoba Coal and Its Density Separated Macerals: A Non-Isothermal Approach

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Advances in Chemical Engineering and Science 2021年第3期11卷 203-227页

作者： Deepak Chandra Sau Amit Banerjee Sanchita Chakravarty Pragyan Senapati Rabiranjan Murmu Harekrushna Sutar CSIR-National Metallurgical Laboratory Jamshedpur India Mechanical Engineering Department ITER SOA Deemed to Be University Bhubaneswar India Chemical Engineering Department Indira Gandhi Institute of Technology Sarang India

This kinetic study focuses on determining the thermal gravimetric profile of a particular grade of Indian sub-bituminous coal. A thermogravimetric analyzer (TGA-1000) was employed to investigate the thermal behavior and extract the kinetic parameters of Jamadoba coal and its corresponding density separated macerals. The weight loss was measured in air atmosphere. The coal samples used in this study were obtained from Jamadoba mines, Jharkhand. Samples of 35 mg and 200 μm mean size were subjected to synthetic air atmospheres (21% O2). Heating rates of 2, 5 and 7°C/min were applied until the temperature reached 1400°C, which was kept constant until burnout. Low heating rate was preferred so that devolatilization occurs prior to ignition and combustion. Derivative thermogravimetry (DTG) analysis method was applied to measure the weight changes and rates of weight loss used for calculating the kinetic parameters. The activation energy (Ea

关键词： Thermal Decomposition kinetic study Jamadoba Coal Non-Isothermal

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study on the Homogeneous Hydrogenation of Maleic Anhydride to Its Derivates Ⅲ.kinetic study on the Hydrogenation of MA to SA

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分子催化 1998年第3期 3-5页

作者： LIU Pu LIU Ye GAO Runxiong YIN Yuanqi (Lanzhou Institute of Chemical Physics The Chinese Academy of Sciences Lanzhou 730000)

ＳｔｕｄｙｏｎｔｈｅＨｏｍｏｇｅｎｅｏｕｓＨｙｄｒｏｇｅｎａｔｉｏｎｏｆＭａｌｅｉｃＡｎｈｙｄｒｉｄｅｔｏＩｔｓＤｅｒｉｖａｔｅｓⅢ．ＫｉｎｅｔｉｃＳｔｕｄｙｏｎｔｈｅＨｙｄｒｏｇｅｎａｔｉｏｎｏｆＭＡｔｏＳＡＬＩＵ... 详细信息

ＳｔｕｄｙｏｎｔｈｅＨｏｍｏｇｅｎｅｏｕｓＨｙｄｒｏｇｅｎａｔｉｏｎｏｆＭａｌｅｉｃＡｎｈｙｄｒｉｄｅｔｏＩｔｓＤｅｒｉｖａｔｅｓⅢ．ＫｉｎｅｔｉｃＳｔｕｄｙｏｎｔｈｅＨｙｄｒｏｇｅｎａｔｉｏｎｏｆＭＡｔｏＳＡＬＩＵＰｕＬＩＵＹｅＧＡＯＲｕｎｘｉｏｎ...

关键词： Homogeneous catalysis kinetic study Hydrogenation Maleic Anhydride Succinic anhydride

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study on the epoxidation of olefins with H_(2)O_(2)catalyzed by biquaternary ammonium phosphotungstic acid

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Chinese Journal of Chemical Engineering 2023年第6期58卷 146-154页

作者： Zijie Zhang Qianyu Zha Ying Liu Zhibing Zhang Jia Liu Zheng Zhou School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093China

Selective epoxidation of olefins is an important field in chemical industry.In this work,we developed a new phosphotungstic acid catalyst{[(C_8H_(17))(CH_(3))_(2)N]_(2)(CH_(2))_(3)}_(1.5){PO_(4)[WO(O_(2))_(2)]_(4)}with long carbon chain and biquaternary ammonium cation.Cyclohexene could be epoxidized to cyclohexene oxide in 96.3%conversion and 98.2%selectivity.The catalyst type,solvent type,catalyst loading,initial molar ratio,temperature,cycle performance and substrate extensibility were studied and optimized,the kinetic parameters about overall reaction and unit reaction were also calculated.Dynamic light scattering analysis was carried out to explain the different catalytic performance between catalysts with different carbon chain length.This novel catalyst and the corresponding dynamics and mechanism study could probably help the industrial application on the epoxidation of cyclohexene with H_(2)O_(2).

关键词： Epoxidation of olefins Phosphotungstic acid Cyclohexene kinetic study

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Tannic Acid as a Polyphenol Material-Assisted Synthesis of Cyclic Carbonates Using CO2 as a Feedstock： kinetic Characteristic and Mechanism Studies

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Chinese Journal of Chemistry 2017年第5期35卷 659-664页

作者： Rongchang Luo Wuying Zhang Xiantai Zhou Hongbing Ji School of Chemistry Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province Sun Yat-sen University Guangzhou Guangdong 510275 China

Tannic acid （TA）/KI as a cheap,green,highly-efficient,biocompatible,and recyclable catalytic system represents the excellent synergistic effect in the cycloaddition reactions of CO2 and epoxides under solvent-free conditions,which is originated from hydrogen bonding between the hydrogen atoms of phenolic hydroxyl groups within TA and the oxygen atom of the epoxide.Therefore,it is considerable to be a sustainable methodology for the utilization of bio-resources.

关键词： carbon dioxide cyclic carbonate tannic acid kinetic study cooperative effect

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kinetic Studies of Solvent and Pressure Effects on the Thermal Isomerization of Palladium Dithizonate

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Chemical Research in Chinese Universities 2000年第2期16卷 141-145页

作者： Yoshimi Sueishi Kazumi Matsumoto Okayama University 日本 Okayama 70 0 -8530

The isomerization of mercury bisdithizonate having tetrahedral stereochemistry occurs in each ligand independently and is unaffected by the presence of the second ligand attached to the same central metal. The effects of solvent and pressure on the thermal isomerization of the square-planar Pd dithizonate complex were studied to determine the influence of ligand on the isomerization rate. The results were compared to those obtained with Hg(HDz)2. The mechanistic implications for the thermal isomerization of Pd(HDz)2 were presented.

关键词： Metal dithizonate kinetic study Solvent effect Pressure effect

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