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Fe-Mn-sepiolite as an effective heterogeneous Fenton-like catalyst for the decolorization of reactive brilliant blue

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Frontiers of Environmental Science & Engineering 2016年第1期10卷 37-45页

作者： Chengyuan SU Weiguang LI Xingzhe LIU Xiaofei HUANG xiaodan yu School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China School of Environment and Resources Guangxi Normal University Guilin 541004 China

A study of the decolorization of reactive brilliant blue in an aqueous solution using Fe-Mn-sepiolite as a heterogeneous Fenton-like catalyst has been performed. The Fourier transform infrared （FTIR） spectra of the catalyst showed bending vibrations of the Fe-O. The Xray diffraction （XRD） patterns of the catalyst showed characteristic diffraction peaks of α-Fe203, γ-Fe203 and MnO. A four factor central composite design （CCD） coupled with response surface methodology （RSM） was applied to evaluate and optimize the important variables （catalyst addition, hydrogen peroxide dosage, initial pH value and initial dye concentration）. When the reaction conditions were catalyst dosage = 0.4 g, [H202]= 0.3 mL, pH= 2.5, [reactive brilliant blue]o = 50mg·L-1, and volume of solution = 500 mL at room temperature, the decolorization efficiency of reactive brilliant blue was 91.98% within 60min. Moreover, the Fe-Mn-sepiolite catalyst had good stability for the degradation of reactive brilliant blue even after six cycles. Leaching of iron ions （〈 0.4 mg·L-l） was observed. The decoloring process was reactive brilliant blue specific via a redox reaction. The benzene ring and naphthalene ring were first oxidized to open ring; these were then oxidized to the alcohol and carboxylic acid. The reactive brilliant blue was decom- posed mainly by the attack of .OH radicals including surface-bound .OH radicals generated on the catalyst surface.

关键词： Fe-Mn-sepiolite catalyst heterogeneous Fen-ton-like reactive brilliant blue homogeneous precipitationmethod hydroxyl radical

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Effective Removal of Tetracycline by Using Biochar Supported Fe3O4 as a UV-Fenton Catalyst

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Chemical Research in Chinese Universities 2019年第1期35卷 79-84页

作者： yu xiaodan LIN Xinchen LI Weiguang FENG Wei School of Environment Harbin Institute of TechnologyHarbin 150090P.R.China Key Labroratory of Songliao Aquatic Environnmento Ministry of Education Jilin Jianzhu UniversityChangchun 130118P.R.China Key Laboratory of Groundwater Resource and Environment Ministry Education College of Environment and ResourcesJilin UniversityChangehun 130021P.R.China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090.P.R.China

Novel Fe3O4-decorate hierarchical porous carbon skeleton derived from maize straw(Fe3O4@MSC)was synthesized by a facile co-precipitation process and a calcination process,which was developed as a UV assisted heterogeneous Fenton-like *** as-synthesized catalysts were characterized via X-ray powder diffraction(XRD), scanning electron microscope(SEM),transmission electron microscope(TEM),Brunauer-Emmet-Teller(BET)and vibrating sample magnetometer(VSM)at room *** morphology and structure analysis revealed that the as-prepared Fe3O4@MSC retained the original pore morphology of the maize straw *** non-uniform poly- hedral Fe3O4 grew on the whole surface of the MSC,which reduced the aggragation of Fe3O4 and provided more active sites to strengthen the UV-assisted Fenton-like *** a result,the tetracycline(TC)degradation efficiency after 40 min reaction and total organic carbon(TOC)removal efficiency after 2 h reaction of Fe3O4@MSC catalyzing UV-Fenton system reached 99.2%and 72.1%,respectively,which were more substantial than those of Fe3O4@MSC/H2O2(31.5%and 2%),UV/H2O2 system(68%and 23.4%)and UV/Fe3O4/H2O2(80% and 37.5%).The electron spin resonance(ESR)results showed that the ·OH played an important role in the catalytic reaction.A possible degradation pathway of TC was proposed on the basis of the identified ***,the UV assisted heterogeneous Fenton-like process in Fe3O4@MSC improved the cycle of Fe^3+/Fe^2+ and activated the interfacial catalytic site,which eventually realized the enhancement of degradation and mineralization to tetracycline.

关键词： Fe3O4 Carbon skeleton of maize straw,Heterogeneous Fenton-like catalyst UV irradiation Degradation of tetracycline

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Maximum entropy based probabilistic load flow calculation for power system integrated with wind power generation

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Journal of Modern Power Systems and Clean Energy 2018年第5期6卷 1042-1054页

作者： Bingyan SUI Kai HOU Hongjie JIA yunfei MU xiaodan yu Shanghai Electric Power Design Institute Co. Ltd. School of Electrical and Information Engineering Tianjin University

Distributed generation including wind turbine(WT) and photovoltaic panel increases very fast in recent years around the world, challenging the conventional way of probabilistic load flow(PLF) calculation. Reliable and efficient PLF method is required to take this chage into *** paper studies the maximum entropy probabilistic density function reconstruction method based on cumulant arithmetic of linearized load flow formulation,and then develops a maximum entropy based PLF(MEPLF) calculation algorithm for power system integrated with wind power generation(WPG). Compared with traditional Gram–Charlier expansion based PLF(GC-PLF)calculation method, the proposed ME-PLF calculation algorithm can obtain more reliable and accurate probabilistic density functions(PDFs) of bus voltages and branch flows in various WT parameter scenarios. It can solve thelimitation of GC-PLF calculation method that mistakenly gains negative values in tail regions of PDFs. Linear dependence between active and reactive power injections of WPG can also be effectively considered by the modified cumulant calculation framework. Accuracy and efficiency of the proposed approach are validated with some test systems. Uncertainties yielded by the wind speed variations, WT locations, power factor fluctuations are considered.

关键词： Maximum entropy Probabilistic load flow Probability density function Wind power generation Monte Carlo simulation

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Ultraviolet Light Assisted Hierarchical Porous Fe2O3 Catalyzing Heterogeneous Fenton Degradation of Tetracycline Under Neutral Condition with a Low Requirement of H2O2

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Chemical Research in Chinese Universities 2019年第2期35卷 304-310页

作者： LIN Xinchen XIE Feng yu xiaodan TANG Xin GUAN Heda CHEN yu FENG Wei Key Laboratory of Groundwater Resource and Environment Ministry of EducationCollege of New Energy and EnvironmentJilin UniversityChangchun 130021P.R.China School of Environment Harbin Institute of TechnologyHarbin 150090R R. China

The hierarchical porous Fe2O3 particles as a novel ultraviolet light assisted heterogeneous Fenton catalysts were synthesized by bio-template synthesis method using iron nitrate as precursor at high temperature of around 550℃.The hierarchical porous structured Fe2O3 was endowed with a large surface area and abundant pore volume,leading to the exposure of more active sites and rapid mass *** synergistic effect of UV irradiation and hie-rarchical porous Fe2O3 improved the photo-degradation efficiency of Tetracycline(TC).The degradation efficiency of Fe203 catalyzing UV-Fenton system reached 97.4%after 60 min reaction,which was more substantial than Fe2O3 catalyzing Fenton system(7.6%)and UV/H2O2 system(59.2%).Moreover,the hierarchical porous Fe2O3 catalyzing UV-Fenton system exhibited an extremely wide pH range(from 3.0 to 9.0,from mildly acidic to slightly alkaline)for efficient degradation of ***,the extraordinary higher degradation efficiency was based on 10 mmol/L H2O2 concentration,which was low requirement for H2O2,Further,the hierarchical porous Fe2O3 can be used for five consecutive cycles with over 95%of the original degradation *** light assisted heterogeneous Fenton reaction in the hierarchical porous Fe2O3 improved the·OH and O2·^-production and Fe(III)/Fe(II)redox cycle,which consequently achieved an excellent degradation rate.

关键词： Heterogeneous Fenton Hierarchical porous Fe2O3 Biological template method Tetracycline degradation

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Dynamic frequency response from electric vehicles in the Great Britain power system

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Journal of Modern Power Systems and Clean Energy 2015年第2期3卷 203-211页

作者： Jian MENG yunfei MU Jianzhong WU Hongjie JIA Qian DAI xiaodan yu Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China School of Engineering Institute of EnergyCardiff UniversityCardiffUK China Electric Power Research Institute Haidian DistrictBeijing 100192China

With the large penetration of renewable energy,fulfilling the balance between electricity demand and supply is a challenge to the modern power *** to the UK government,the wind power penetration will reach 30%by the year *** role of electric vehicles(EVs)contributing to frequency response was investigated.A dynamic frequency control strategy which considers the comfort level of vehicle owners was developed for EVs to regulate their power consumption according to the deviation of system frequency.A simulation model of a population of EVs equipped with such controlwas implemented inMatlab/Simulink *** this paper,a simplified Great Britain power system model is used to study the contribution of EVs to dynamic frequency *** case study showed that using EVs as a demand response resource can greatly reduce the frequency *** the rapid response from EVs can help reduce the operation cost of conventional generators.

关键词： Electric vehicles(EVs) Dynamic frequency response Vehicle to grid(V2G) State of charge(SOC)

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Distributionally robust optimization configuration method for island microgrid considering extreme scenarios

Energy and AI

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Energy and AI 2024年第3期17卷 179-194页

作者： Qingzhu Zhang yunfei Mu Hongjie Jia xiaodan yu Kai Hou Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin300072China Key Laboratory of Smart Energy&Information Technology of Tianjin Municipality Tianjin UniversityTianjin300072China

The marine climate conditions are intricate and variable. In scenarios characterized by high proportions of wind and solar energy access, the uncertainty regarding the energy sources for island microgrid is significantly exacerbated, presenting challenges to both the economic viability and reliability of the capacity configuration for island microgrids. To address this issue, this paper proposes a distributionally robust optimization (DRO) method for island microgrids, considering extreme scenarios of wind and solar conditions. Firstly, to address the challenge of determining the probability distribution functions of wind and solar in complex island climates, a conditional generative adversarial network (CGAN) is employed to generate a scenario set for wind and solar conditions. Then, by combining k-means clustering with an extreme scenario selection method, typical scenarios and extreme scenarios are selected from the generated scenario set, forming the scenario set for the DRO model of island microgrids. On this basis, a DRO model based on multiple discrete scenarios is constructed with the objective of minimizing the sum of investment costs, operation and maintenance costs, fuel purchase costs, penalty costs of wind and solar curtailment, and penalty costs of load loss. The model is subjected to equipment operation and power balance constraints, and solved using the columns and constraints generation (CCG) algorithm. Finally, through typical examples, the effectiveness of this paper’s method in balancing the economic viability and robustness of the configuration scheme for the island microgrid, as well as reducing wind and solar curtailment and load loss, is verified.

关键词： Island microgrid Extreme scenario Distributionally robust optimization Conditi onal generative adversarial network

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The Static Stability Region of an Integrated Electricity-Gas System Considering Voltage and Gas Pressure

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Engineering 2024年第5期36卷 132-145页

作者： yunfei Mu Zhibin Liu Xiangwei Guo Hongjie Jia Kai Hou xiaodan yu Bofeng Luo Hairun Li Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China State Grid Tianjin Electric Power Company Tianjin 300201China China Southern Power Grid Digital Grid Research Institute Co. Ltd.Guangzhou 510700China

In an integrated electricity-gas system(IEGS),load fluctuations affect not only the voltage in the power system but also the gas pressure in the natural gas *** static voltage stability region(SVSR)method is a tool for analyzing the overall static voltage stability in a power ***,in an IEGS,the SVSR boundary may be overly optimistic because the gas pressure may collapse before the voltage ***,the SVSR method cannot be directly applied to an *** this paper,the concept of the SVSR is extended to the IEGS-static stability region(SSR)while considering voltage and gas ***,criteria for static gas pressure stability in a natural gas system are proposed,based on the static voltage stability criteria in a power ***,the IEGS-SSR is defined as a set of active power injections that satisfies multi-energy flow(MEF)equations and static voltage and gas pressure stability constraints in the active power injection space of natural gas-fired generator units(NGUs).To determine the IEGSSSR,a continuation MEF(CMEF)method is employed to trace the boundary point in one specific NGU scheduling direction.A multidimensional hyperplane sampling method is also proposed to sample the NGU scheduling directions *** obtained boundary points are further used to form the IEGSSSR in three-dimensional(3D)space via a Delaunay triangulation hypersurface fitting ***,the numerical results of typical case studies are presented to demonstrate that the proposed method can effectively form the IEGS-SSR,providing a tool for IEGS online monitoring and dispatching.

关键词： Integrated electricity-gas system Static stability region Continuation multi-energy flow Multidimensional hyperplane sampling

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CTDAE & CTODE models and their applications to power system stability analysis with time delays

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Science China(Technological Sciences) 2013年第5期56卷 1213-1223页

作者： yu xiaodan JIA HongJie WANG ChengShan Key Laboratory of Smart Grid of Ministry of Education Tianjin University

In this paper,two new models suitable for power system stability analysis with considering time delays are *** are constraint time-delayed ordinary differential equation model(CTODE model) and constraint time-delayed differential algebraic equation model(CTDAE model).In these two models,dimension of the time-delayed equation is significantly reduced so as to speed up the calculation *** derivations to their nonlinear and incremental linear forms are ***,some of their good features are ***,a typical time-delayed system and single-machine-infinite-bus system are selected to validate the new models through Lyapunov-Krasovskii criterion and eigenvalue locus tracing *** reveals that some unnecessary calculations in the algorithm can be avoided to achieve higher efficiency based on new *** new models and new criterion given in this paper are helpful to design wide area protectors for bulk power systems.

关键词： time delay power system CTDAE model and CTODE model TDAE model and TODE model

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CWGAN-GP with residual network model for lithium-ion battery thermal image data expansion with quantitative metrics

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Energy and AI 2024年第2期16卷 14-23页

作者： Fengshuo Hu Chaoyu Dong Luyu Tian yunfei Mu xiaodan yu Hongjie Jia School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China Agency for Science Technology and ResearchNanyang Technological University639798Singapore

Lithium batteries find extensive applications in energy *** is a crucial indicator for assessing the state of lithium-ion batteries,and numerous experiments require thermal images of lithium-ion batteries for research ***,acquiring thermal imaging samples of lithium-ion battery faults is challenging due to factors such as high experimental costs and associated *** address this,our study proposes the utilization of a Conditional Wasserstein Generative Adversarial Network with Gradient Penalty and Residual Network(CWGAN-GP with Residual Network)to augment the dataset of thermal images depicting lithium-ion battery *** employ various evaluation metrics to quantitatively analyze and compare the generated thermal images of lithium-ion ***,the expanded dataset,comprising four types of thermal images depicting lithium-ion battery faults,is input into a Mask Region-based Convolutional Neural Network for *** results demonstrate that the proposed model surpasses both traditional Generative Adversarial Network and Wasserstein Generative Adversarial Network in terms of the quality of generated thermal images of lithium-ion ***,the augmentation of the dataset leads to an improvement in the fault diagnosis accuracy of the Mask Region-based Convolutional Neural Network.

关键词： Lithium-ion batteries Generative adversarial network CWGAN-GP

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A preventive control strategy for static voltage stability based on an efficient power plant model of electric vehicles

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Journal of Modern Power Systems and Clean Energy 2015年第1期3卷 103-113页

作者： Mingshen WANG yunfei MU Hongjie JIA Jianzhong WU Xiuping YAO xiaodan yu Janaka EKANAYAKE Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China School of Engineering Institute of EnergyCardiff UniversityWales CF103BNUK State Grid Xinjiang Electric Power Company Urumqi 830002China

With the increasing integration of wind farms and electric vehicles(EVs)in power systems,voltage stability is becoming more and more *** on vehicle-to-grid(V2G),an efficient power plant model of EVs(E-EPP)was developed to estimate EV charging load with available corresponding response capacity under different charging strategies.A preventive control strategy based on E-EPP was proposed to maintain the static voltage stability margin(VSM)of power system above a predefined security *** control modes were used including the disconnection of EV charging load(‘V1G’mode)and the discharge of stored battery energy back to power grid(‘V2G’mode).A modified IEEE 14-bus system with high penetration of wind power and EVs was used to verify the effectiveness of preventive control *** results showed that the proposed strategy can not only improve the static voltage stability of power system with considerable wind generation,but also guarantee the travelling comfort for EV owners.

关键词： Electric vehicle(EV) Vehicle-to-grid(V2G) Efficient power plant(EPP) Preventive control Static voltage stability

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