The Experts below are selected from a list of 4671 Experts worldwide ranked by ideXlab platform
Zhi Sun - One of the best experts on this subject based on the ideXlab platform.
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Sustainable Preparation of LiNi1/3Co1/3Mn1/3O2-V2O5Cathode Materials by Recycling Waste Materials of Spent Lithium-Ion Battery and Vanadium-Bearing Slag
ACS Sustainable Chemistry and Engineering, 2018Co-Authors: Xiangqi Meng, Pengge Ning, Hongbin Cao, Jie Hao, Gaojie Xu, Zhi SunAbstract:© 2018 American Chemical Society. Waste streams containing heavy metals are always of concern from both environmental and resource-depleting points of view. The challenges are in most cases related to the effectiveness for high-value-added Materials Recovery from such waste, with which the environmental impacts during recycling shall be low. In this research, two typical heavy-metal-containing waste streams, i.e., spent lithium-ion batteries and vanadium-bearing slag, were simultaneously treated, and this enables regeneration of the LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode Materials which was considered difficult because of the dislocation of nickel and lithium ions during electrochemical performance. By using the intermediate product during vanadium-bearing slag treatment, the vanadium-embedded cathode material can be prepared which delivers excellent electrochemical performances with a specific capacity of 156.3 mA h g -1 after 100 cycles at 0.1C with the capacity retention of 90.6%; even the additive amount is only 5%. A thin layer of vanadium oxide is found to be effective to promote electrochemical performance of the cathode material. Using the principles of green chemistry, this process enables high-performance cathode material regeneration without introducing extraction chemicals and with much lower environmental impacts as compared to traditional metallurgical technologies.
Jiangrong Kong - One of the best experts on this subject based on the ideXlab platform.
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an atom economic process for the Recovery of high value added metals from spent lithium ion batteries
Journal of Cleaner Production, 2016Co-Authors: Xiangping Chen, Bailin Fan, Liping Xu, Tao Zhou, Jiangrong KongAbstract:Abstract With the surge of spent lithium-ion batteries (LIBs) generated worldwide, resource utilization of these exhausted batteries will be desiderated to alleviate the resource depletion and environmental pollution. Herein an atom-economic process combined with reductive leaching and selective precipitation was explored to recover valuable metals from waste cathode Materials of spent LIBs in this study. Waste cathode Materials were firstly dissolved using citric acid and d -glucose as leachant and reductant, respectively. About 99%, 91%, 92% and 94% Li, Ni, Co and Mn could be leached under the following optimized conditions: retention time – 120 min, reaction temperature – 80 °C, concentration of citric acid – 1.5 mol/L, pulp density – 20 g/L and reductant dosage – 0.5 g/g. High value-added metals were then separated and recovered by selective precipitation method. It was also discovered that the residual leachate after metals Recovery can be re-utilized as leaching reagent with potentially excellent performance as fresh leachant. In addition, the leaching and precipitation mechanism was also tentatively investigated in terms of glucose oxidation pathway and Materials Recovery. Finally, atom utilization efficiency was calculated and the atom utilization efficiency can achieve as high as 98% for the whole Recovery process. Both experimental and theoretical results obtained can support a sustainable and desirable process for a comprehensive Recovery of metal values from spent LIBs in a closed-loop manner.
Xiangqi Meng - One of the best experts on this subject based on the ideXlab platform.
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Sustainable Preparation of LiNi1/3Co1/3Mn1/3O2-V2O5Cathode Materials by Recycling Waste Materials of Spent Lithium-Ion Battery and Vanadium-Bearing Slag
ACS Sustainable Chemistry and Engineering, 2018Co-Authors: Xiangqi Meng, Pengge Ning, Hongbin Cao, Jie Hao, Gaojie Xu, Zhi SunAbstract:© 2018 American Chemical Society. Waste streams containing heavy metals are always of concern from both environmental and resource-depleting points of view. The challenges are in most cases related to the effectiveness for high-value-added Materials Recovery from such waste, with which the environmental impacts during recycling shall be low. In this research, two typical heavy-metal-containing waste streams, i.e., spent lithium-ion batteries and vanadium-bearing slag, were simultaneously treated, and this enables regeneration of the LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode Materials which was considered difficult because of the dislocation of nickel and lithium ions during electrochemical performance. By using the intermediate product during vanadium-bearing slag treatment, the vanadium-embedded cathode material can be prepared which delivers excellent electrochemical performances with a specific capacity of 156.3 mA h g -1 after 100 cycles at 0.1C with the capacity retention of 90.6%; even the additive amount is only 5%. A thin layer of vanadium oxide is found to be effective to promote electrochemical performance of the cathode material. Using the principles of green chemistry, this process enables high-performance cathode material regeneration without introducing extraction chemicals and with much lower environmental impacts as compared to traditional metallurgical technologies.
Henrik Wenzel - One of the best experts on this subject based on the ideXlab platform.
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Techno-economic assessment of central sorting at material Recovery facilities - The case of lightweight packaging waste
Journal of Cleaner Production, 2016Co-Authors: Ciprian Cimpan, Anja Maul, Henrik Wenzel, Thomas PretzAbstract:Simulation of technical and economic performance for Materials Recovery facilities (MRFs) is a basic requirement for planning new, or evaluating existing, separate waste collection and recycling systems. This study mitigates the current pervasive scarcity of data on process efficiency and costs by documenting typical steps taken in a techno-economic assessment of MRFs, using the specific example of lightweight packaging waste (LWP) sorting in Germany. Thus, the study followed the steps of dimensioning of buildings and equipment, calculation of processing costs and projections of revenues from material sales and sorting residues disposal costs. Material flows through the plants were simulated considering both optimal process conditions and real or typical conditions characterised by downtime and frequent operation at overcapacity. By modelling four plants of progressively higher capacity (size) and technological level, the analysis revealed the cost impact of economies of scale, as well as complementary relations linking capacity, technology and process efficiency. Hence, within a fourfold increase in capacity (from 25,000 to 100,000 tonnes per year), the total capital investment was shown to triple from 7 to 21 million EUR and the yearly operational expenditure grew by a factor of 2.4 from 2 to 4.7 million EUR. As a result, specific unit processing cost decreased from 110 to 70 EUR/tonne. Material sales and disposal costs summed to between a net cost of 25 EUR/tonne and net revenue of 50 EUR/tonne. Measured as total Materials Recovery, the difference between optimal and typical operation was approximately 15% points. The complex nature of LWP waste combined with challenging processing conditions were identified as important factors explaining the relatively low overall Recovery efficiencies achieved in these plants.
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central sorting and Recovery of msw recyclable Materials a review of technological state of the art cases practice and implications for Materials recycling
Journal of Environmental Management, 2015Co-Authors: Ciprian Cimpan, Anja Maul, Thomas Pretz, Michael Jansen, Henrik WenzelAbstract:Today's waste regulation in the EU comprises stringent material Recovery targets and calls for comprehensive programs in order to achieve them. A similar movement is seen in the US where more and more states and communities commit to high diversion rates from landfills. The present paper reviews scientific literature, case studies and results from pilot projects, on the topic of central sorting of recyclable Materials commonly found in waste from households. The study contributes, inter alia, with background understanding on the development of Materials Recovery, both in a historical and geographical perspective. Physical processing and sorting technology has reached a high level of maturity, and many quality issues linked to cross-contamination by commingling have been successfully addressed to date. New sorting plants tend to benefit from economies of scale, and innovations in automation and process control, which are targeted at curtailing process inefficiencies shown by operational practice. Technology developed for the sorting of commingled recyclables from separate collection is also being successfully used to upgrade residual MSW processing plants. The strongest motivation for central sorting of residual MSW is found for areas where source separation and separate collection is difficult, such as urban agglomerations, and can in such areas contribute to increasing recycling rates, either complementary to- or as a substitute for source separation of certain Materials, such as plastics and metals.
Xiangping Chen - One of the best experts on this subject based on the ideXlab platform.
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an atom economic process for the Recovery of high value added metals from spent lithium ion batteries
Journal of Cleaner Production, 2016Co-Authors: Xiangping Chen, Bailin Fan, Liping Xu, Tao Zhou, Jiangrong KongAbstract:Abstract With the surge of spent lithium-ion batteries (LIBs) generated worldwide, resource utilization of these exhausted batteries will be desiderated to alleviate the resource depletion and environmental pollution. Herein an atom-economic process combined with reductive leaching and selective precipitation was explored to recover valuable metals from waste cathode Materials of spent LIBs in this study. Waste cathode Materials were firstly dissolved using citric acid and d -glucose as leachant and reductant, respectively. About 99%, 91%, 92% and 94% Li, Ni, Co and Mn could be leached under the following optimized conditions: retention time – 120 min, reaction temperature – 80 °C, concentration of citric acid – 1.5 mol/L, pulp density – 20 g/L and reductant dosage – 0.5 g/g. High value-added metals were then separated and recovered by selective precipitation method. It was also discovered that the residual leachate after metals Recovery can be re-utilized as leaching reagent with potentially excellent performance as fresh leachant. In addition, the leaching and precipitation mechanism was also tentatively investigated in terms of glucose oxidation pathway and Materials Recovery. Finally, atom utilization efficiency was calculated and the atom utilization efficiency can achieve as high as 98% for the whole Recovery process. Both experimental and theoretical results obtained can support a sustainable and desirable process for a comprehensive Recovery of metal values from spent LIBs in a closed-loop manner.