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NO reduction by carbon-based gases based on coal gasification fractions:NO reduction intermediate identification and kinetic analysis

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Frontiers of Environmental Science & Engineering 2025年第3期19卷 175-189页

作者： Xiang Zhang Jian Tian Tanghui Hu Guangyong Yue Xianlong Liu Wen Zhou Xiaohong Liu Xinye Wang Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Engineering Research Center for Green Industrialization Technology of Industrial WasteSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China Hubei Huda Tianshu New Energy Materials Industrial Research and Design Institute Co. Ltd.Wuhan 430062China Wuhan Tianshu Dust Removal Equipment Co. Ltd.Wuhan 430062China Engineering Laboratory for Energy System Process Conversion&Emission Control Technology of Jiangsu Province School of Energy and Mechanical EngineeringNanjing Normal UniversityNanjing 210042China

Combining pulverized coal gasifiers with cement kiln production is promising for application in low-cost and efficient NO *** paper presents a pulverized coal gasifier catalytic denitration technique and investigates the homogeneous reduction(by CO and CH_(4))and heterogeneous catalytic reduction(by coke,CaO,MgO,and Fe_(2)O_(3))of NO.A combination of Chemkin simulations and fixed-bed experiments is used to elucidate the reaction pathways and key intermediates of NO reduction by carbon-based *** addition,the activation energies for different catalyst combinations were analyzed via reaction *** results demonstrate that the presence of small amounts of O_(2) inhibits NO reduction by CO but promotes NO reduction by CH_(4).The NCO·radical is essential for the NO reduction process,and the generation of this radical depends on the CH_(4) cleavage intermediate and O·*** and Fe_(2)O_(3) exhibit more significant catalytic effects on NO reduction by carbon-based gases than the other catalysts *** presence of a small amount of O_(2) in the reacting gas mixtures facilitates the NO reduction *** activation energy is reduced to 1.02 kJ/mol,and the NO conversion reaches 99.80%when the catalyst is C+CaO+MgO+Fe_(2)O_(3) and the gas composition is CO+CH_(4)+O_(2).This work provides theoretical support and data recommendations for the use of pulverized coal gasifiers for the denitrification of cement kilns.

关键词： Carbon-based gas Catalytic denitration Coke Kinetic analysis Reaction mechanism

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H_∞ consensus control of a class of second-order multi-agent systems without relative velocity measurement

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Chinese Physics B 2010年第7期19卷 188-192页

作者：张文广曾德良郭振凯 Beijing Key Laboratory of Measurement and Control New Technology and System for Industrial Process Control & Computer Engineering SchoolNorth China Electric Power University School of Mathematics and Information Ludong University

This paper studies consensus control problems for a class of second-order multi-agent systems without relative velocity measurement. Some dynamic neighbour-based rules are adopted for the agents in the presence of external disturbances. A sufficient condition is derived to make all agents achieve consensus while satisfying desired H∞ performance. Finally, numerical simulations are provided to show the effectiveness of our theoretical results.

关键词： consensus control H∞ second-order multi-agent systems

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Study of sliding-mode control based grid-side PWM rectifier for wind power generation system under unbalanced input voltage condition

Study of sliding-mode control based grid-side PWM rectifier ...

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2009 4th IEEE Conference on industrial Electronics and Applications, ICIEA 2009

作者： Zhang, Jianhua Li, Xiaojun Hou, Guolian An, Xuemin Beijing Key Laboratory of Industrial Process Measurement and Control New Technology and System North China Electric Power University Beijing China

ISBN: (纸本)9781424428007

A sliding mode control scheme is presented in αβ frame for grid-side PWM rectifiers in wind power generation systems. The positive and negative sequence voltages are needed to design the controller, nevertheless, the positive and negative sequence currents are not needed. This scheme is compared with the dual current control scheme in the rotating frame d-q. The simulation results show that sliding mode control scheme can realize unit power factor operation when the amplitude is unbalanced. © 2009 IEEE.

关键词： Sliding mode control

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Data driven state detection algorithm for ash deposition detection

Data driven state detection algorithm for ash deposition det...

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2013 18th International Conference on Methods and Models in Automation and Robotics, MMAR 2013

作者： Liu, Jiwei Liu, Jizhen Deliang, Zeng Chang, Taihua Key Laboratory of Measurement and Control New Technology and System for Industrial Process North China Electric Power University Beijing China

ISBN: (纸本)9781467355063

A data driven state detection algorithm was proposed to improve the security and reliability of equipment. The algorithm is used for one class of objects whose state parameters change slowly and cumulatively in the long term. The concepts of multi-scale system, multi-scale entropy and multi-scale exergy were used to describe these processes. With the help of the algorithm, an ash deposition index for the radiant heating surface of a 600 MW unit was constructed to monitor the states of the instruments. Noise was analyzed. The results of simulation experiments demonstrate the effectiveness of the algorithm, which can provide a technical basis for condition maintenance. © 2013 West Pomeranian University of technology.

关键词： Exergy

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Modeling on SCR process of a coal-fired boiler using LSSVM method 27

Modeling on SCR process of a coal-fired boiler using LSSVM m...

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27th Chinese control and Decision Conference, CCDC 2015

作者： Yang, Tingting Chao, Cui You, Lv Jian, Li Key Laboratory of Measurement and Control New Technology and System for Industrial Process North China Electric Power University Beijing China

ISBN: (纸本)9781479970179

Selective catalytic reduction (SCR) is widely applied in coal-fired power plants. SCR process is a complex physical and chemical process with multi-input, strong coupling, nonlinear, and time delay characteristics. An effective model is the basis of conducting control and optimization. In this paper, influencing factors of catalytic reaction in SCR converter are analyzed and five measurable parameters are selected as the model input variables. NOx emission and NH3slip are separately taken as output variables. The LSSVM algorithm is employed to build the SCR models using real plant operation data from a 1000 MW coal-fired boiler. Simulation results have shown satisfied model accuracy and effectiveness are achieved. © 2015 IEEE.

关键词： coal-fired power plant data-driven model LSSVM selective catalytic reduction

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Electricity price forecasting using neural networks trained with entropic criterion

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7th International Symposium on Neural Networks, ISNN 2010

作者： Zhang, Jianhua Wang, Jingyue Wang, Rui Hou, Guolian Beijing Key Laboratory of Industrial Process Measurement and Control New Technology and System North China Electric Power University Beijing 102206 China

ISBN: (纸本)9783642129896

Accurate electricity price forecasting is critical to market participants in wholesale electricity markets. The problem becomes more complex because the acquired data series are non-linear and non-Gaussian. In this paper, Multi Layer Perceptrons (MLP) trained with minimizing error entropy (MEE) algorithm is utilized to forecast electricity price. Compared with the conventional MLP with mean square error (MSE) criterion, the proposed approach can achieve better performance in simulated examples. © 2010 Springer-Verlag Berlin Heidelberg.

关键词： Entropy

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Dynamic characteristics and predictive control for Organic Rankine Cycle

Dynamic characteristics and predictive control for Organic R...

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2012 7th IEEE Conference on industrial Electronics and Applications, ICIEA 2012

作者： Zhang, Jianhua Li, Ying Wang, Zhuofei Hou, Guolian Beijing Key Laboratory of Industrial Process Measurement and Control New Technology and System North China Electric Power University NCEPU Beijing China

ISBN: (纸本)9781457721175

Organic Rankine Cycle (ORC) is particularly suitable for the recovery of energy from low-quality heat sources. In this paper, a generalized predictive controller is proposed for a low-quality heat recovery process operating on an Organic Rankine Cycle. The simulation results show that the proposed control strategy can achieve good transient and steady response along with decoupling performance. © 2012 IEEE.

关键词： Waste heat

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Study on optimization control Method of Bed temperature for Circulating Fluidized Bed 36

Study on optimization control Method of Bed temperature for ...

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第36届中国控制会议

作者： YANG Tingting DI Xiaohui HONG Feng Beijing Key Laboratory of New Technology and System on Measuring and Control for Industrial Process(North China Electric Power University)

ISBN: (纸本)9781538629185

The combustion system of Circulating Fluidized Bed(CFB) boiler is a strong-coupled non-linear system with large *** temperature is one of the most important parameters,which influences the safety of unit and couples with the main steam pressure *** control method is beneficial to suppress the temperature *** this paper,a fuzzy PI controller based on Genetic Algorithm(GA) is designed for the model of bed temperature,of which the parameters are optimal in the region to ensure the control *** the basis of mechanism analysis and gray correlation analysis,a multivariable model is *** coal feed and the primary air are selected as inputs,the bed temperature and main steam pressure are selected as *** the model is decoupled by partial feed-forward method,and the GA is used to optimize the parameters of the fuzzy PI *** are carried out in different conditions and the results indicate that the performance of optimized fuzzy PI controller based on proposed model is better than fuzzy PI controller.

关键词： CFB bed temperature partial feed-forward decoupling fuzzy PI controller genetic algorithm

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Study on the interlayer and interphase multiple coordination deformation mechanism of Fe-20.4Cr-4.7Mn-0.27N duplex stainless steel with gradient heterostructure

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Applied Surface Science 2025年 701卷

作者： Li, Lingxiao Yang, Tingsong Liu, Zhilei Feng, Yanfeng Zhang, Xinjun Jin, Miao Chen, Lei Yang, Kun Hao, Shuo School of Quality and Technical Supervision Hebei University Baoding071002 China School of Mechanical and Power Engineering Zhengzhou University Zhengzhou450001 China School of Mechanical Engineering Yanshan University Qinhuangdao066004 China Hebei Technology Innovation Center for Lightweight of New Energy Vehicle Power System Hebei University Baoding071002 China Industrial Science &Technology Institute for Anti-fatigue Manufacturing Zhengzhou450016 China National Engineering Research Center of Flat Rolling Equipment University of Science and Technology Beijing Beijing100083 China Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering College of Mechatronics and Control Engineering Shenzhen University Shenzhen518060 China

In this work, ultrasonic rolling treatment was conducted on the surface (USRT) of the Fe-20.4Cr-4.7Mn-0.27N duplex stainless steel plate for 6 passes, its influences on the tensile deformation and damage behaviors were clarified by means of XRD, EBSD, TEM, SEM, etc. The results show that the USRT introduced gradient heterostructure layers with a total volume ratio of about 27 % in the Fe-20.4Cr-4.7Mn-0.27N steel, the α’bcc-martensite proportion increases from 0 % in the base-material core to 5 % on the USRT surface. This leaded to an improvement in yield strength of 125 MPa, an increase in ultimate tensile strength of 17 MPa and a decrease in total elongation of 20 %. Besides, a further increase in α’bcc-martensite proportion of 35 %–38 % was shown in austenite throughout the USRT specimen after tensile fracture. While in ferrite, the dislocation activity in the USRT layer was obviously weaker than that in the base-material core during tensile deformation. The complex coordination deformation behavior is closely associated with the plasticity partitioning difference between the heterogeneous phases and between the heterogeneous layers. This finally leaded to different damage characteristics on the USRT surface from that in the as-annealed specimen. © 2025 Elsevier B.V.

关键词： Tensile strength

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Modeling on SCR process of a Coal-fired Boiler Using LSSVM method

Modeling on SCR Process of a Coal-fired Boiler Using LSSVM m...

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第27届中国控制与决策会议

作者： YANG Tingting CUI Chao LV You LI Jian Key Laboratory of Measurement & Control New Technology and System for Industrial Process(North China Electric Power University)

ISBN: (纸本)9781479970186

Selective catalytic reduction（SCR） is widely applied in coal-fired power *** process is a complex physical and chemical process with multi-input,strong coupling,nonlinear,and time delay *** effective model is the basis of conducting control and *** this paper,influencing factors of catalytic reaction in SCR converter are analyzed and five measurable parameters are selected as the model input *** emission and NHslip are separately taken as output *** LSSVM algorithm is employed to build the SCR models using real plant operation data from a 1000 MW coal-fired *** results have shown satisfied model accuracy and effectiveness are achieved.

关键词： selective catalytic reduction coal-fired power plant LSSVM data-driven model

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