Article
Engineering, Environmental
Bo Wang, Qiaowen Yang
Summary: This study developed a clean and efficient method for the recovery of vanadium from spent SCR catalysts. By leaching, concentrating, and precipitating, high-purity vanadium pentoxide was obtained. This method provides a new approach for the effective utilization of vanadium from waste catalysts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Sedat Ilhan, Dogukan Akgun
Summary: The leaching efficiency of spent Ni-Mo hydrodesulfurization catalyst was investigated by studying the effects of grinding, stirring speed, H2SO4 concentration, and temperature. The leaching behavior and kinetics of MoO3, NiMoO4, Al2O3, and AlPO4 from the spent catalyst were determined. The apparent activation energy values for the leaching of MoO3, NiMoO4, Al2O3, and AlPO4 in H2SO4 solutions were calculated.
JOURNAL OF SUSTAINABLE METALLURGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Naga Raju Batti, N. R. Mandre
Summary: An investigation and optimization of the recovery of Nickel (Ni) and Aluminum (Al) through sulphuric acid leaching was conducted. The study found that sulphuric acid is a suitable leaching agent for selective leaching and could extract 98.5% of NiO and 40.7% of Al2O3. The recovery of Ni and Al was successfully achieved through selective crystallization and precipitation methods.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Metallurgy & Metallurgical Engineering
Yuanyuan Cai, Liwen Ma, Xiaoli Xi, Zuoren Nie, Zijie Yang
Summary: This study proposed a technical route for the comprehensive recovery of valuable metals from spent Ni-Mo/γ-Al2O3 hydrofining catalysts, optimized the process conditions, and achieved good economic and environmental benefits. The use of specific extraction systems and precipitation agents enabled high separation efficiencies for Al, Mo, and Ni, realizing the comprehensive recovery of metals in the spent catalyst.
Article
Engineering, Environmental
Haoran Yu, Changmin Liu, Shuo Liu, Yu Gu, Shuya Wang, Ali Yaras, Linchao Hu, Wenyi Zhang, Mingguo Peng, Hasan Arslanoglu, Linqiang Mao
Summary: This study proposed an efficient method for the recovery of Mo and Ni from spent petroleum refining catalyst through O2-rich roasting and organic acid leaching. The method has the advantage of producing less high salinity wastewater, making it environmentally-friendly.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Biochemistry & Molecular Biology
Tian Wang, Jing Ren, Annavarapu Ravindra, Yan Lv, Thiquynhxuan Le
Summary: This study investigates the properties and distribution of Ni, V, and Fe in the SFCC catalyst using EPMA-EDX, SEM, and XPS techniques. The leaching kinetics of Ni, V, Fe, and Al in different acids are studied under microwave heating. The results show that sulfuric acid is more effective in removing contaminant metals, especially Ni. The leaching kinetics indicate that V has a lower activation energy compared to Fe and Ni, with the removal priority being V > Fe > Ni.
Article
Engineering, Chemical
Qian Zhang, Isabelle Jones, Mingming Zhu, Zhezi Zhang, Jian Gao, Dongke Zhang
Summary: This study investigates the catalytic hydrodesulfurization of a spent tire pyrolysis oil distillate using a Ni-Mo catalyst. The results show that increasing temperature, pressure, or H-2 concentration enhances sulfur removal efficiency, and the sulfiding of the catalyst plays a critical role in the hydrodesulfurization process.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Bingying Gao, Haohao Jiang, Man Zeng, Mingguo Peng, Linchao Hu, Wenyi Zhang, Linqiang Mao
Summary: A high-efficiency recovery method for Mo and Ni from spent Mo-Ni/Al2O3 catalyst via soda roasting and solvent extraction was developed, achieving efficient separation and enrichment of Mo and Ni. The proposed method is simple, with a high recovery rate and high selectivity.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Patricia Perez-Romo, Candido Aguilar-Barrera, Georgina C. Laredo, Carlos Angeles-Chavez, Jose Fripiat
Summary: Silica poisoning during hydrotreating can severely deactivate catalysts, but in this study, selective removal of silica using glycerol depolymerization process restored the catalytic activity and physical properties successfully. The catalyst samples were analyzed using various techniques before and after silica compound removal.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Engineering, Chemical
Istvan Balazs Illes, Tamas Kekesi
Summary: The redox equilibria and thermodynamics of the HCl-Co-Ni-Mn system were studied, taking chloro-complexation into account. The leaching efficiencies of LCO, NMC111, and LFP black masses were examined in various HCl concentrations and temperatures. The results showed that higher HCl concentrations and temperatures led to shorter leaching times and higher leaching yields. The study also investigated the chloride ion activity and the evolution of Cl-2 during leaching, as well as the oxidative precipitation process using hypochlorite solutions.
MINERALS ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Rasmita Barik, Priyanka Mukherjee, Kishor Kumar Sahu, Kali Sanjay, Malay Kumar Ghosh, Mamata Mohapatra
Summary: This study focuses on the synthesis of iron molybdate nano-material from molybdenum spent catalyst via roasting, leaching, and hydrothermal precipitation. Experimental parameters were optimized to achieve a maximum extraction of Mo from the roasted catalyst. The synthesized Fe-2(MoO4)(3) showed capacitive behavior with a maximum specific capacitance of 33 F g(-1).
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2021)
Article
Chemistry, Organic
H. Arslanoglu
Summary: Composite catalysts with molybdenum are commonly used in oil refining for hydrogenation processes, resulting in a large amount of used catalysts. Recovering molybdenum from these worn-out catalysts through leaching in an alkaline medium has shown to be effective, with a maximum dissolution rate of 92.12%. The recovery of molybdenum from spent catalysts not only provides a secondary source of metal but also promotes environmental awareness.
PETROLEUM CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xinyang Dong, Xuanrui Huang, Rui Tang, Yulin Min, Qunjie Xu, Zhenhu Hu, Penghui Shi
Summary: Herein, a novel photochemical oxidation method was proposed to leach Co and Ni ions in spent LIB cathodes, achieving leaching efficiencies of 99.73% and 97.54% when irradiated with hydrogen peroxide as the oxidant in acetonitrile and dichloromethane as the solvent under UV light for 4 h. The oxidation mechanism of the reaction was investigated, and three free radical oxidation pathways were proposed. This study is the first to combine the UV/H2O2 photo-oxidation reaction with spent LIB recycling, providing a universal, green, and simple operation path for metal recycling field in the future.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Pratima Meshram, Sami Virolainen, Abhilash, Tuomo Sainio
Summary: In this study, hydrometallurgical recycling of metals from high-cobalt-content spent lithium-ion batteries from laptops was explored. The purification processes of precipitation and solvent extraction were used. The results showed that the electrode material of the batteries contained significant amounts of cobalt, nickel, manganese, and lithium. By using precipitation and solvent extraction techniques, 99.9% pure cobalt sulfate was successfully synthesized from the leach liquor of the spent batteries.
Article
Materials Science, Multidisciplinary
Wei-Sheng Chen, Wei-Shr Liu, Wei-Chung Chen
Summary: This study proposes an efficient method for platinum recovery while retaining spent membranes. The membrane and catalyst were separated using isopropanol, and the spent membrane was dissolved in a 50% ethanol solution to prepare the precursor for subsequent membrane regeneration. Under optimal conditions, the platinum leaching rate was about 90%.
Article
Environmental Sciences
Zhexuan Zhao, Zhaofu Qiu, Ji Yang, Benteng Ma, Zhen Li, Shuguang Lu, Yongye Xu, Limei Cao, Wei Zhang
WASTE AND BIOMASS VALORIZATION
(2020)
Article
Chemistry, Multidisciplinary
Tianying Xie, Wenjun Luo, Zhenhua Zhou, Wei Sun, Qian Wang, Limei Cao, Ji Yang
Article
Chemistry, Multidisciplinary
Danni Chen, Fengqing Xiong, Hao Zhang, Chenglong Ma, Limei Cao, Ji Yang
Article
Chemistry, Multidisciplinary
Fengqing Xiong, Danni Chen, Chenglong Ma, Limei Cao, Ji Yang
Article
Chemistry, Physical
Muhammad Tariq, Yiyi Wu, Chenglong Ma, Meesam Ali, Waqas Qamar Zaman, Zain Abbas, Khurram Shahzad Ayub, Jiacheng Zhou, Gehui Wang, Li-mei Cao, Ji Yang
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Engineering, Chemical
Jie Yang, Qing Wang, Jiacheng Zhou, Qicheng Shen, Limei Cao, Ji Yang
SEPARATION AND PURIFICATION TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Jie Yang, Limei Cao, Qing Wang, Jiacheng Zhou, Qicheng Shen, Ji Yang
Article
Nanoscience & Nanotechnology
Chenglong Ma, Wei Sun, Waqas Qamar Zaman, Zhenhua Zhou, Hao Zhang, Qicheng Shen, Limei Cao, Ji Yang
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Nanoscience & Nanotechnology
Cheng-Long Ma, Zhi-Qiang Wang, Wei Sun, Li-Mei Cao, Xue-Qing Gong, Ji Yang
Summary: The study investigates the electronic state changes of iridium-based derivatives during the surface reconstruction process and highlights the role of the reconstructed [IrO6]-[IrO6] framework in the oxygen evolution reaction in acidic systems. Lu2Ir2O7 exhibits the best OER performance among the Ir-based pyrochlore, showcasing a ninefold improvement in Ir-mass activity compared to IrO2.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Cheng-Long Ma, Xue-Rui Yang, Zhi-Qiang Wang, Wei Sun, Lin Zhu, Li-Mei Cao, Xue-Qing Gong, Ji Yang
Summary: This study evaluates the structural and electronic-state characteristics of long-range disordered amorphous iridium-based oxides and their performance in oxygen evolution reaction (OER). It demonstrates that the ultrahigh OER performance in acidic media is driven by the more d-hole-containing electronic state of Ir-V created by cationic vacancies. Moreover, the high edge-shared [IrOx]-[IrOx] motif proportion structure achieves a stable OER process similar to IrO2.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Ji Yang, Cheng-long Ma, Lin Zhu, Li-mei Cao
Summary: Two iridium-based crystal structures, K0.3IrO2 center dot xH2O and Rb0.3IrO2 center dot xH2O, were synthesized for application in the oxygen evolution reaction (OER). The increase of oxygen vacancy concentration caused by lattice distortion in the 3R-IrO2 crystal is negatively correlated with the activity of OER. The 3R-IrO2 crystal is not thermodynamically stable and not suitable for hydrogen production by electrolysis of water.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Chemical
Yan Du, Xiaohan Li, Limei Cao, Ji Yang
Summary: This study focuses on the resource utilization of mercury using the electrochemical reduction method. MoS2@Ti electrodes were prepared using a solvothermal method and analyzed using various techniques. The optimized conditions for efficient reduction of Hg2+ were determined. The MoS2@Ti electrode showed high removal efficiency even after repeated use. A neural network model was used to accurately predict the reduction efficiency of Hg2+. This study contributes to the resource utilization of mercury.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Physical
Tianying Xie, Limei Cao, Wei Sun, Ji Yang
Summary: The paper developed a new process that integrates methanol steam reforming with denitration to reduce the threshold use of hydrogen. The prepared CuZnOx-CeZrOy-MnPdOz@Ni candidate catalyst showed promising denitration efficiency under specific conditions. The study indicates that inline hydrogen selective catalytic reduction of NO is a promising strategy for efficient NOx control.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Limei Cao, Qian Wang, Ji Yang
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Wei Sun, Zhiqiang Wang, Zhenhua Zhou, Yiyi Wu, Waqas Qamar Zaman, Muhammad Tariq, Li-mei Cao, Xue-qing Gong, Ji Yang
CHEMICAL COMMUNICATIONS
(2019)
Article
Metallurgy & Metallurgical Engineering
Arsyad Maulana Dzulqornain, Ana Belen Cueva-Sola, Kyeong Woo Chung, Jin-Young Lee, Rajesh Kumar Jyothi
Summary: This study presents a hydrometallurgical process for the separation of light rare earth elements (LREEs) using oxidation, precipitation, solvent extraction, and stripping techniques. Selective oxidation with potassium permanganate was employed for the separation of cerium (III). Solvent extraction with Cyanex 572 and cross-current scrubbing were used to achieve the separation of lanthanum (III) from neodymium (III) and praseodymium (III).
Article
Metallurgy & Metallurgical Engineering
Bo Chen, Shenxu Bao, Yimin Zhang
Summary: This study investigated the effects of Al, Fe, P, Si and Na on the precipitation characteristics of vanadium in the ultrasound precipitation system. The concentration upper limits and the negative influence on the precipitation kinetics were determined for each impurity. The findings provide theoretical and technical support for the industrial application of ultrasound precipitation technology.
Article
Metallurgy & Metallurgical Engineering
Chunlin He, Mingwei Qi, Yun Liu, Zunzhang Liu, Yuezhou Wei, Toyohisa Fujita, Guifang Wang, Shaojian Ma, Wenchao Yang, Junyuan Gan
Summary: In this study, D201 x 7 resin and tartaric acid were used as materials and complexing agents for the separation of germanium from sulfuric acid solution. The study successfully achieved the separation of germanium and demonstrated the high selectivity and adsorption performance of the resin.
Article
Metallurgy & Metallurgical Engineering
Xiaobo Zhu, Yue Liu, Chen Ma, Wang Li
Summary: A selective and highly effective method for the extraction and separation of V(IV) and Fe(III) using N235 and P507 as solvent extractants is proposed. The pH, composition, and concentration of the extractant mixture have significant effects on the extraction efficiency and separation factor. The mixing of P507 and N235 generates the P507 monomer, which enhances the extraction efficiency and weakens the stability of vanadium containing extraction complex. Cation exchange process forms the extraction complexes.
Article
Metallurgy & Metallurgical Engineering
B. Behnajady, J. Yousefi Seyf, S. Karimi, M. Moradi, M. Sohrabi
Summary: Deep eutectic solvents (DES) have potential as environmentally-friendly solvents for recovering metals from spent lithium-ion batteries (LIBs). Experimental and molecular dynamics simulation results showed that the chloride ions in DES can form complexes with lithium, manganese, and nickel ions, facilitating their extraction.
Review
Metallurgy & Metallurgical Engineering
Sebastian Kinas, Dorota Jermakowicz-Bartkowiak, Anna Dzimitrowicz, Piotr Cyganowski
Summary: The high demand for platinum-group metals (PGMs) and Re in economical and industrial applications related to environmental protection and energy conversion/storage has led to resource scarcity. Thus, it is crucial to recover and recycle these rare metals. This study critically reviews the recent progress in the effective recovery of PGMs and Re from materials relevant to sustainable technologies, emphasizing practical aspects, environmental impact, and issues related to the unit processes of recovery.
Article
Metallurgy & Metallurgical Engineering
Guopeng Yang, Qinggang Li, Guiqing Zhang, Mingyu Wang, Zuoying Cao, Wenjuan Guan, Jiawei Du, Shengxi Wu
Summary: The study proposes an efficient, clean, and economical process for recovering V2O5 from titanium-white waste through hydrogen peroxide stripping and precipitation of vanadium products by heating. Experimental results show that the use of D2EHPA as a modifier prolongs the duration of maximum stripping efficiency, enabling continuous operation.
Article
Metallurgy & Metallurgical Engineering
Guisu Yu, Shuainan Ni, Yun Gao, Ditang Mo, Zhiyuan Zeng, Xiaoqi Sun
Summary: This research proposes a novel green process for the selective recovery of rare earth elements (RE) from spent NdFeB permanent magnet using hydrophobic deep eutectic solvent (HDES). Through optimization of extraction conditions and stripping method, efficient and clean separation and recovery have been achieved.
Article
Metallurgy & Metallurgical Engineering
Jia Li, Xinsheng Wu, Xiaozhou Zhou, Li Zeng, Shengxi Wu, Mingyu Wang, Wenjuan Guan, Zuoying Cao, Qinggang Li, Guiqing Zhang
Summary: This paper presents a complete hydrometallurgical route for the full-component utilization of deep-sea polymetallic nodules (DPN), achieving high recovery efficiency and near-zero waste production with low energy consumption.
Article
Metallurgy & Metallurgical Engineering
Sanae Elmisaoui, Abderrazak M. Latifi, Lhachmi Khamar
Summary: A first principles model is developed to describe the dissolution mechanism of phosphate ore particles in a solution of phosphoric acid. The model accounts for non-uniform size of ore particles using particle size distributions and quantifies their influence on the model predictions. A global estimability analysis is carried out to determine the estimable parameters from experimental data, and the predictions show good agreement with the experimental data. The computed activation energy indicates that diffusion is the rate limiting step of the dissolution process.