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Insight into the Design and Construction of Cr Substituted Co-Based Columnar Activated Coke Catalysts for Effective and Reliable Removal of Methylbenzene and Hg0 Concurrently

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SSRN 2022年

作者： Gao, Lei Yi, Lei Shan, Jian Li, Caiting Li, Linlin Liu, Yijin Zhou, Yihui Liu, Yingyun Xie, Dong Wang, Hanqing Xie, Jinke National & Local Joint Engineering Research Center for Airborne Pollutants Control and Radioactivity Protection in Buildings Hengyang421001 China School of Resources Environment and Safety Engineering University of South China Hengyang421001 China Key Laboratory of Prefabricated Building Energy Saving Technology of Hunan Province Hengyang421001 China College of Environmental Science and Engineering Hunan University Changsha410082 China

An array of CoCr oxides co-modified activated cokes pretreated with HNO3 (XCoyCr1-y/ACs) were synthesized and evaluated for simultaneously effective and credible elimination of methylbenzene (MB) and Hg0. BET, SEM, TEM, EDX, XRD, H2-TPR, in situ DRIFTS and XPS were adopted for exploring the physicochemical characteristics and reaction mechanisms of aforesaid samples. H2-TPR result showed the Cr-doped Co-Cr catalysts excellent reducibility in view of the synergistic effect between CoOx and CrOx. Especially, 6%Co0.5Cr0.5/AC obtained outstanding performance and prominent stability for MB and Hg0 removal, and it behaved the optimal performance of MB (96.1%) and Hg0 (88.3%) at 240 ℃. It could be explained by that the formation of CoCr2O4 spinel entailed more uniform distribution of active components, abundant lattice defects and even the redox cycle of Cr6++Co2+↔Cr3++Co3+ which spawned adequate Co3+ species and active oxygen species. The interaction between MB removal and Hg0 removal was estimated and the presence of Hg0 barely affected MB removal, whereas the existence of MB manifested a distinctly suppressive influence on Hg0 removal, suggesting that MB removal might prevail over Hg0 removal. Meanwhile, the rivalry between MB and Hg0 progressively shifted from adsorption sites to active oxygen species with time. Moreover, the influences of O2, NO, SO2 and H2O on MB and Hg0 simultaneous removal were systematically appraised. Notably, 6%Co0.5Cr0.5/AC exerted remarkable resistance to SO2 and H2O. Combined with characterizations and experiments, the pathway for the simultaneous removal of MB and Hg0 via adsorption and catalytic oxidation on 6%Co0.5Cr0.5/AC was summarized. This work could deliver references to the design of advanced catalysts for simultaneous removal of MB and Hg0. © 2022, The Authors. All rights reserved.

关键词： Catalytic oxidation

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A Passive Integration Unit for Single-Phase Three-Level AC/DC Resonant Converter

A Passive Integration Unit for Single-Phase Three-Level AC/D...

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International Conference on Power Electronics and Motion control (IPEMC)

作者： Cheng Deng Shuang Li Andrés Escobar-Mejía College of Information Engineering Xiangtan University Xiangtan China Hunan Province Engineering Research Center for Multi-Energy Collaborative Control Technology Xiangtan China Electrical Engineering Program Universidad Tecnológica de Pereira Pereira Colombia

ISBN: (数字)9781728153018

ISBN: (纸本)9781728153025

A single-phase three-level AC/DC resonant converter is designed to achieve a high power density and operate over a wide output voltage range (200Vdc-430Vdc). In order to further improve the power density of the converter, a passive integration is proposed with flexible multi-layer foil (FMLF) integration technique in this paper, which includes two filter capacitors, two Boost inductors, two series resonant capacitors, two series resonant inductors and two transformers. The composition principle, magnetic flux analysis and parameter design of the proposed integrated unit are introduced in detail, respectively. A Maxwell/Ansoft simulation model is built for a 1.5kW-110kHz single-phase three-level AC/DC converter to verify the feasibility of the proposed integrated unit.

关键词： Power system measurements Analytical models Density measurement Capacitors Resonant converters Transformer cores Inductors

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Operando Selenium Treatment Towards Enhanced Cyclic Stability for Single-Crystal Ni-Rich Cathode at Ultra-High Voltage of 4.7 V

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SSRN 2023年

作者： Zhang, Zhi Ding, Xiang He, Xinyou Gong, Yang Xiao, Biaobiao Shen, Jixue Ou, Xing Hunan Provincial Key Laboratory of Water Treatment Functional Materials Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion Aircraf College of Chemistry and Materials Engineering Hunan University of Arts and Science Changde415000 China Engineering Research Center of the Ministry of Education for Advanced Battery Materials School of Metallurgy and Environment Central South University Changsha410083 China Institute of Advanced Battery Materials and Devices Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China Tianmu Lake Institute of Advanced Energy Storage Technologies Co. Ltd Liyang213300 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Developing high-voltage (≥4.3 V vs Li/Li+) single-crystal Ni-rich LiNixCoyMn1-x-yO2 offers an enticing strategy to achieve high energy density for lithium-ion batteries. However, at high-voltage operation, the cathode will be vulnerable to induce the intrinsic Oα- (α 0.6Co0.1Mn0.3O2 (SC-NCM) cathode materials by introducing the surface Se element, exhibiting an "anti-aging" effect of inhibiting the escape of oxygen on SC-NCM particles during the ultra-high voltage (4.7 V) cycling. Both theoretical calculation and experimental results confirm that the outside-in nanostructure would substitute some mobile Oα- at the surface of highly charged SC-NCM particle, stabilizing the oxygen lattice and suppressing O2 release during long-term cycling. Meanwhile, the surface modification of thin Se layer will alleviate the parasitic reactions and improve the electronic conductivity. Under the synergistic strategy of surface modification and interface doping, the obtained SC-NCM exhibits boosted cyclic stability in coin half-cell and pouch full-cell simultaneously. Therefore, the reversible capacity of LiNi0.6Co0.1Mn0.3O2 at high voltage is competitive with comercial LiNixCoyMn1-x-yO2 (x ≥ 0.8), demonstrating more superior safety ability and cyclic property. It provides an effective approach for improving the long-term performance of Ni-rich cathode materials for practical application under ultra-high working voltage. © 2023, The Authors. All rights reserved.

关键词： Single crystals

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Operando Selenium Treatment Towards Enhanced Cyclic Stability for Single-Crystal Ni-Rich Cathode at Ultra-High Voltage of 4.7 V

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SSRN 2023年

作者： Zhang, Zhi Ding, Xiang He, Xinyou Gong, Yang Xiao, Biaobiao Shen, Jixue Ou, Xing Engineering Research Center The Ministry of Education for Advanced Battery Materials School of Metallurgy and Environment Central South University Changsha410083 China Hunan Provincial Key Laboratory of Water Treatment Functional Materials Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion Aircraf College of Chemistry and Materials Engineering Hunan University of Arts and Science Changde415000 China Institute of Advanced Battery Materials and Devices Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China Tianmu Lake Institute of Advanced Energy Storage Technologies Co. Ltd Liyang213300 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

关键词： Single crystals

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Catenary Fault Identification Based on PSO-ELM 4

Catenary Fault Identification Based on PSO-ELM

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2019 4th Annual International Conference on Information System and Artificial Intelligence, ISAI 2019

作者： Yi, Lingzhi Zhao, Jian Yu, Wenxin Liu, Yue Yi, Chuyang Jiang, Dan Hunan Province Engineering Research Center for Multi-Energy Collaborative Control Technology Hunan Province Cooperative Innovation Center for Wind Power Equipment and Energy Conversion College of Information Engineering Xiangtan University Xiangtan Hunan411105 China College of Electrical and Information Engineering Hunan University Changsha Hunan410082 China School of Information and Electrical Engineering Hunan University of Science and Technology Xiangtan Hunan411201 China Hunan Railway Professional Technology College Zhuzhou Hunan412000 China

Catenary has been exposed outdoors for a long term, and its failure rate is very high, which has seriously affected the operation and development of traction power supply system. Due to the problems of long detection time, backward detection means and influenced by human factors in traditional catenary fault identification methods, this paper proposed a fault identification method based on PSO-ELM. This method could reduce the hidden layer nodes of traditional ELM and improve the accuracy of identification. In this paper, this method was compared with ELM, GA-ELM, BP, GA-BP and PSO-BP. A sample of catenary detection data of a power supply section in 2018 was selected. The results show that PSO-ELM is an efficient method for the fault identification of catenary. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Failure analysis

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Optimization of SRM Direct Instantaneous Torque control Strategy based on Improved Firefly Algorithm 3

Optimization of SRM Direct Instantaneous Torque Control Stra...

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3rd IEEE Conference on energy Internet and energy System Integration, EI2 2019

作者： Liu, Jiangyong Wang, Lixiong Yi, Lingzhi Zhu, Guanghui Yin, Xinjian Xiangtan Univ. Hunan Prov. Eng. Research Center for Multi-Energy Collaborative Control Technology College of Information Engineering Xiangtan China XEMC Wind Power Co. Ltd Xiangtan China

ISBN: (纸本)9781728131375

The direct instantaneous torque control has weak anti-interference ability and insufficient torque ripple optimization. In this paper, a method based on improved firefly algorithm to optimize SRM direct instantaneous torque control is proposed. On the basic of proportional integral control, the improved firefly algorithm is used to optimize the parameters which will help to find the optimal simulation parameters automatically. The method proposed in this paper has reduced torque ripple and improved dynamic response of the system. The experimental simulation verifies its effectiveness. © 2019 IEEE.

关键词： Dynamic response

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multi-user power optimizationbased on multi-objective grey wolf Optimizer

Multi-user power optimizationbased on multi-objective grey w...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Bo Zhou Jiangyong Liu Lingzhi Yi Hunan Province Engineering Research Center for Multi-Energy Collaborative Control Technology Xiangtan University Xiangtan China Hunan Province Engineering Research Center for Multi-Energy Collaborative Control Technology Innovation Center for Wind Power Equipment and Energy Xiangtan China

ISBN: (纸本)9781728133997

In the smart grid environment, in order to improve the electricity habits of residential users and optimize the residential electricity structure, the idea of a home energy management system is applied to intelligent buildings. The building users and loads are classified and analyzed separately, a model of automatic demand response for building intelligent electricity scheduling is built and it is optimized for daily total electricity bill, user discomfort, and power peaks and valleys. Renewable energy, the energy storage of household electric vehicles is also considered. The multi-objective grey wolf optimization algorithm based on the fuzzy crowding judgment based on dimension review is used to solve the model. Finally, the effectiveness of the MATLAB example simulation is verified.

关键词： Buildings Mathematical model energy storage Pareto optimization Load modeling Load management

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An Intelligent Approach: Integrating Openai for Experiment Planning in Biochar Immobilization of Soil Cd

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SSRN 2023年

作者： Yang, Hongwei Wang, Jie Mo, Rumeng Hu, Pengxiang Liu, Xiangrong Liu, Yingliang Cui, Jianghu Xiao, Yong Key Laboratory for Biomass Materials and Energy Ministry of Education Guangdong Provincial Engineering Technology Research Center for Optical Agriculture College of Materials and Energy South China Agricultural University Guangzhou510642 China Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management Guangdong Institute of Eco-environmental Science and Technology Guangzhou510650 China National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangzhou510650 China Shaoyang Branch of Hunan Tobacco Corporation Shaoyang422000 China Intelligent Connected Vehicle Traffic Accident Investigation and Reconstruction Standard Laboratory Beijing Public Security Bureau Police College Road Traffic Management Department Beijing Police College Beijing102202 China

Immobilization of Cd in soil is a complex systematic process in which biochar materials and experimental conditions need to be selected from an infinite space of candidates. Exploration of the entire space is not feasible due to the large number of repeated experiments required. In this study, we propose a strategy for deeply integrating AI techniques to determine the biochar properties and experimental conditions for achieving maximum immobilisation rates under specific soil conditions. We developed six interpretable tree models, among which the LSBoost model performed best. In addition, we developed a Graphical User Interface (GUI) through which soil properties can be manually entered and Bayesian algorithms applied. This allowed us to inversely extrapolate the experimental conditions that achieved maximum carbon sequestration rates under these soil conditions. Then, we use these conditions to link with OpenAI and utilize ChatGPT to obtain detailed experiment plans, which are displayed on the GUI interface for researchers' reference. © 2023, The Authors. All rights reserved.

关键词： Soils

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Influence of Strain Rates and Aging Time on Microstructure and Hardness of Integrally Compressed 6082 Aluminum Alloy

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SSRN 2023年

作者： Hu, Zhili Zheng, Jia Pang, Qiu Sun, Qian Zhao, Ning Hubei Long Zhong laboratory Hubei Xiangyang441000 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China Hubei Research Center for New Energy & Intelligent Connected Vehicle Wuhan University of Technology Wuhan430070 China Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Wuhan430081 China National & Local Joint Engineering Laboratory for Special Titanium Alloy Pressing Technologies Western Superconducting Technologies Co. Ltd. Xi’an710018 China

In this study, an in-depth analysis of the microstructure and hardness of 6082 aluminum alloy under a novel solution-forging integrated process is conducted by performing a series of isothermal uniaxial compression tests at various strain rates and aging durations. The results indicate that the highest hardness achieved is 125 HV at peak aging with a forming strain rate of 10 s-1, a 16.1% improvement compared to the conventional T6 forming process. The deformation shortens the subsequent peak aging time from 8 hours in the conventional process to 6 hours. In addition, the composite phases, including short-range disordered B'/U2 phase and composite phase with multiple structures, are also discovered under the condition of a strain rate of 10 s-1 and 6 hours of aging. While, as the strain rate increases, the degree of recrystallization decreases and then the refined grain size increases, accompanied by the increase in dislocation density. For the integrated process, the deformation microstructure inherited to the aging state, including grain morphology and dislocation density, as well as the aging precipitated phase, especially for the formation of composite phase, are the main reasons for the higher hardness after aging than the traditional T6 state. © 2023, The Authors. All rights reserved.

关键词： Strain rate

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Room Impulse Response Reshaping-Based Blind Source Separation for an Underdetermined Reverberant Environment

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SSRN 2024年

作者： Xie, Yuan Zou, Tao Yang, Junjie Sun, Weijun Xie, Shengli School of Mechanical and Electrical Engineering Guangzhou University Guangdong-Hong Kong-Macao Key Laboratory of Multi-scale Information Fusion and Collaborative Optimization Control of Complex Manufacturing Process Guangzhou510006 China School of Automation Guangdong University of Technology Joint International Research Laboratory of Intelligent Information Processing and System Integration of IoT Ministry of Education of the P.R.C. Guangzhou510006 China School of Automation Guangdong University of Technology Guangdong Key Laboratory of IoT Information Processing Guangdong-HongKong-Macao Joint Laboratory for Smart Discrete Manufacturing Guangzhou510006 China School of Automation Guangdong University of Technology Key Laboratory of Intelligent Detection and the IoT in Manufacturing Ministry of Education 111 Center for Intelligent Batch Manufacturing Based on IoT Technology Guangzhou510006 China

Blind source separation under an underdetermined reverberation environment is a very challenging issue. The classical method is based on the expectation maximization algorithm. However, it is limited to high reverberation environments, resulting in bad or even invalid separation performance. To eliminate this restriction, a room impulse response reshaping-based expectation maximization method is designed to solve the problem of blind signal separation in an underdetermined reverberant environment. Firstly, a room impulse response reshaping technology is designed to eliminate the influence of audible echo on the reverberant environment, improving the quality of the received signals. Then, a new mathematical model of time-frequency mixing signals is established to reduce the approximation error of model transformation caused by high reverberation. Furthermore, an improved expectation maximization method is proposed for real-time update learning rules of model parameters, and then the sources are separated using the estimators provided by the improved expectation maximization method. Experimental results based on source separation of speech and music mixtures demonstrate that the proposed algorithm achieves better separation performance while maintaining much better robustness than popular expectation maximization methods. © 2024, The Authors. All rights reserved.

关键词： Reverberation

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