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Eggshell as an adsorbent for removing dyes and metallic ions in aqueous solutions

Cleaner Chemical Engineering 2022年 2卷

作者： Rayane de Oliveira Zonato Bianca Ramos Estevam Isadora Dias Perez Valquíria Aparecida dos Santos Ribeiro Rosane Freire Boina Laboratory of Water Wastewater and Reuse – Faculty of Technology and Sciences São Paulo State University (UNESP) Roberto Símonsen St 305 Presidente Prudente-SP 19060-900 Brazil Laboratory of Optimization Design and Advanced Control - Faculty of Chemical Engineering University of Campinas (UNICAMP) Albert Einstein Ave 500 Campinas-SP 13083-852 Brazil Laboratory of Studies in Environmental Technologies – Technological Federal University of Paraná (UTFPR) 635 Marcilio Dias St Apucarana-PR 86812-460 Brazil

Contamination of water with metallic ions and dyes leads to several impacts on the environment and human health. The adsorption comes as an economic and simple process to remove these pollutants from water. The use of residues as adsorbents can make the process even more sustainable and cheaper. This work proposes the use of a solid residue (eggshells) as an adsorbent of dyes - Reactive Blue 198 (RB) and Direct Black 22 (DB) - and metallic ions (Cd 2+ and Cr 3+ ). The solid was characterized by SEM, EDS, FTIR, BET and pH-PZC; and the adsorption process was investigated for the adsorbent dosage, kinetic and isotherm analysis. The quantifications of dyes and metallic ions were determined by UV-VIS spectroscopy and atomic absorption spectroscopy, respectively. The eggshells presented a porous structure, with a surface area of 435 cm 2 .g −1 , composed mainly of CaCO 3 and a neutral surface charge at pH 7. It was verified that the phenomenon occurs by chemical interactions between the adsorbents and the adsorbates, having the external transport as the limit step. Regarding the isotherm models, the dyes fit the Langmuir model and the metallic ions to the Dubinin-Radushkevich model. 1.0 g of eggshells was sufficient to adsorb 96 % of RB; 97 % of BD; 99 % of Cd 2+ ; and 95 % of Cr 3+ . Thus, the process analyzed in this research shows to be a promising alternative for removing these water pollutants while giving use to a solid residue.

关键词： Hazardous pollutants Textile dye wastewater Bioadsorbent Batch adsorption Wastewater treatment

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An Adaptive Event-Triggered Synchronization Approach for Chaotic Lur’e Systems Subject to Aperiodic Sampled Data

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IEEE Transactions on Circuits and Systems II: Express Briefs 2019年第3期66卷 442-446页

作者： Yueying Wang Hamid Reza Karimi Huaicheng Yan School of Aeronautics and Astronautics Shanghai Jiao Tong University Shanghai China Department of Mechanical Engineering Politecnico di Milano Milan Italy Key Laboratory of Advanced Control and Optimization for Chemical Process of Ministry of Education East China University of Science and Technology Shanghai China

This brief deals with the problem of master-slave synchronization for chaotic Lur'e systems with aperiodic sampled data. Specifically, a novel aperiodic adaptive event-triggered communication mechanism is introduced to reduce the transmission load, which covers the previous ones as special cases. By partially resorting to the time-dependent Lyapunov function, a new synchronization criterion is derived, which depends on both the upper and lower bounds of variable sampling interval. Finally, Chua's circuit system is chosen as an illustrative example to show the virtue and effectiveness of the achieved synchronization strategies.

关键词： Synchronization Chaotic communication Master-slave Circuits and systems Extraterrestrial measurements Symmetric matrices Adaptive systems

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Multi-objective modeling and optimization for scheduling of cracking furnace systems

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Chinese Journal of Chemical Engineering 2017年第8期25卷 992-999页

作者： Peng Jiang Wenli Du Key Laboratory of Advanced Control and Optimization for Chemical Process Ministry of Education School of Information Science and Engineering East China University of Science and Technology

Cracking furnace is the core device for ethylene production. In practice, multiple ethylene furnaces are usually run in parallel. The scheduling of the entire cracking furnace system has great significance when multiple feeds are simultaneously processed in multiple cracking furnaces with the changing of operating cost and yield of product. In this paper, given the requirements of both profit and energy saving in actual production process, a multi-objective optimization model contains two objectives, maximizing the average benefits and minimizing the average coking amount was proposed. The model can be abstracted as a multi-objective mixed integer non- linear programming problem. Considering the mixed integer decision variables of this multi-objective problem, an improved hybrid encoding non-dominated sorting genetic algorithm with mixed discrete variables （MDNSGA-II） is used to solve the Pareto optimal front of this model, the algorithm adopted crossover and muta- tion strategy with multi-operators, which overcomes the deficiency that normal genetic algorithm cannot handle the optimization problem with mixed variables. Finally, using an ethylene plant with multiple cracking furnaces as an example to illustrate the effectiveness of the scheduling results by comparing the optimization results of multi-objective and single objective model.

关键词： Cracking furnace systems Feed scheduling Multi-objective mixed integer nonlinear optimization Genetic algorithm

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U-model enhanced control of Volterra series systems

U-model enhanced control of Volterra series systems

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第三十八届中国控制会议

作者： Quanmin Zhu Weicun Zhang Jing Chen Department of Engineering Design and Mathematics University of the West of England School of Automation and Electrical Engineering University of Science and Technology Beijing Key Laboratory of Advanced Process Control for Light Industry Jiangnan University

This study expands the U-model based control(U-control in short) concept and formulation, a universal model-independent framework for designing control systems, into Volterra series modelled nonlinear systems. With this framework, various Volterra series control schemes can be universally achieved with relative concise/general formulation. In techniques, this study takes U-model structure to realise U-Volterra series model conversion for model inversion and designs the invariant linear stable controller in a feedback loop to lay a basis for specifying system transient and steady state performances. Heuristically, a bench test example is used to demonstrate the effectiveness of the design procedure, as well as the routines in applications.

关键词： U-model based control U-control dynamic inversion Volterra series systems simulation studies

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$H_{\infty}$ Output Tracking control for Networked Systems With Adaptively Adjusted Event-Triggered Scheme

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IEEE Transactions on Systems, Man, and Cybernetics: Systems 2019年第10期49卷 2050-2058页

作者： Huaicheng Yan Chenyang Hu Hao Zhang Hamid Reza Karimi Xiaowei Jiang Ming Liu Key Laboratory of Advanced Control and Optimization for Chemical Process of Ministry of Education East China University of Science and Technology Shanghai China School of Information Science and Engineering East China University of Science and Technology Shanghai China Department of Control Science and Engineering Tongji University Shanghai China Department of Mechanical Engineering Politecnico di Milan Milan Italy College of Mechatronics and Control Engineering Hubei Normal University Huangshi China Research Center of Satellite Technology Harbin Institute of Technology Harbin China

The H ∞ output tracking control problem of the networked control systems (NCSs) under an adaptively adjusted event-triggered scheme is investigated in this paper. Firstly, a novel adaptively adjusted event-triggered scheme developed in the NCSs with stochastic sensor faults is proposed to choose the necessary packets of sampled data to be transmitted through the networks. Then, the considered system is described as a time-delay system with a delay-distribution for investigation. Based on the established model, a novel stability criterion and the state-feedback controller design with a desired performance of H ∞ output tracking control for the systems are both derived by using Lyapunov functional. An algorithm is also presented to explain the process of adaptively adjusted event-triggered scheme method. Finally, a satellite tracking case is provided to demonstrate the effectiveness of the proposed approach.

关键词： Bandwidth Delays Actuators Communication networks Symmetric matrices Networked control systems

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Biogeography-based multi-objective optimization algorithm with hybrid migration and applying in ethylene cracking process 36

Biogeography-based multi-objective optimization algorithm wi...

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第36届中国控制会议

作者： Zheming Huang Rongbin Qi East China University of Science and Technology Key Laboratory of Advanced Control and Optimization for Chemical ProcessMinistry of Education

ISBN: (纸本)9781538629185

The Ethylene cracking is highly nonlinear, complex process with many constraints because of the complex running state of cracking furnace groups. For the solutions to multi-objective problems of yield, cost and benefits, this paper puts forward a biogeography-based multi-objective optimization algorithm with hybrid migration（BBMOHM）. The hybrid migration strategy combines the self-adaptive migration with the simplex operator and the replication migration, which strengthens the convergence and the search ability, to avoid falling into local optimum. For the goal of utilizing the dominance information between individuals, this algorithm adopts the migration model of dominance degree to assist migration strategies improving the performance of the algorithm. Finally, experiments about the ZDT test function and the multi-objective optimization problem of the ethylene cracking process is verified the BBMOHM achieves good performance on convergence and distribution.

关键词： biogeography-based optimization multi-objective self-adaptive migration ethylene cracking optimization

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Robust Tracking control of Nonlinear Singularly Perturbed Systems 36

Robust Tracking Control of Nonlinear Singularly Perturbed Sy...

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第36届中国控制会议

作者： Jing Xu Yugang Niu the Key Laboratory of Advanced Control and Optimization for Chemical Process （East China University of Science and Technology） Ministry of Education

ISBN: (纸本)9781538629185

This paper presents a robust control scheme for the tracking control of singularly perturbed uncertain systems. The design problem is divided into two parts: tracking the reference trajectory and enhancing the robustness of the dynamic *** using the time-scale techniques, dynamic inversion approach and linear parameter-varying methods, a set of singularly perturbed state feedback controllers are employed to enhance the tracking performance and robustness of a dynamic system against parameter uncertainties, actuator and sensor unmodelled dynamics, and external disturbances. The longitudinal control of an F16 aircraft model is included to show the merits and and effectiveness of the proposed design scheme.

关键词： Self-scheduled Tracking control Singularly perturbed systems Robust control

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Economic plant wide control in debutanizer column

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AIP Conference Proceedings 2019年第1期2088卷

作者： Toto Haksoro Totok R. Biyanto Januar A. D. Pratama Ahmad H. Rahman Zakia P. Ramdhani Aulia S. Aisjah Mohammad Okky Mabruri Rinda N. Hidayati 1Process Design Control and Optimization Laboratory Department of Engineering Physics Institut Teknologi Sepuluh Nopember. Surabaya Indonesia

Debutanizer is a distillation column used on LPG fractionation unit to separate butane and naphtha compound. Butane will be sold as LPG, while naphtha is used to add the octane rating in gasoline. The distillation column consumes large amounts of energy. Fifty percent of industrial energy need were used for cooling and heating of distillation column, caused production cost were high. Plant Wide control (PWC) needs to integrate the control of process and optimization the costs of process or economic. Plant wide control is a method that can be used to determine good control strategy for debutanizer column. The purpose of plant wide control is to simplify connection between all the operated unit for safety requirement and increase output response. Prices of materials used include the energy prices. PWC managed to optimize the composition according to the specified values that are 0.4639 for the XD composition and 0.001 for the XB composition. When the flow rate of feed increase, the energy used is 3.5 GJ/h and able to save on operating costs of 0.37 USD/h, when the flow rate of feed is decrease, the energy used is 2.9 GJ/h and able to save on operating costs of 0.78 USD/h.

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Investigation for sustainable polymers - Insights for the use of glycerol as a biorefinery product for the synthesis of monomers and polymers

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Chemical Engineering Transactions 2018年 65卷 703-708页

作者： Assumpção, Daniel C. Barbosa, Maria Ingrid R. Mariano, Adriano P. Jardini, André Maciel, Maria Regina W. Filho, Rubens Maciel University of Campinas School of Chemical Engineering Laboratory of Optimization Design and Advanced Process Control Bioen Division Av. Albert Einstein 500 Campinas SP Brazil National Institute of Science and Technology in Biofabrication - BIOFABRIS Av. Albert Einstein 500 Campinas SP Brazil

ISBN: (纸本)9788895608624

The use of bio-based resources for the production of added value products has become a key element of sustainable development. In this regard, biorefinery is a recognized approach to transforming renewable feedstocks into fuels, chemicals, and materials. However, the integration of chemicals production into current biorefineries is challenging. This route is the least developed and most complex of all biorefinery operations and bio-based chemicals suffer from direct competition with oil-based counterparts. Additionally, the overabundance of targets makes difficulty the decision making for companies. As such, there is a need to identify a core group of primary chemicals and secondary intermediates analogous to those in the petrochemical industry, including products with well-established value chains. To address some of these challenges, this work intends to contribute with ideas for the use of glycerol as a feedstock for polymers production. These polymers may be produced directly from glycerol or from some organic acid derived from glycerol. Such organic acids are in general flexible building blocks which may result in polymers for several applications, such as packaging materials and textile fibers, insulation foam, electronics and car parts. Among organic acids, succinic acid and lactic acid has a great potential to be used in the production of specialty polymers for medical implants because these materials can combine biodegradability with biocompatibility. Bearing this in mind, potential conversion routes of glycerol to lactic acid-derived specialty polymers are discussed in this work. Copyright © 2018, AIDIC Servizi S.r.l.

关键词： Lactic acid

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Adaptive Neural Output Feedback control for Nonstrict-Feedback Nonlinear Systems with Quantized Input 36

Adaptive Neural Output Feedback Control for Nonstrict-Feedba...

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第36届中国控制会议

作者： Yan Dong Zhaoxu Yu Fangfei Li Key Laboratory of Advanced Control and Optimization for Chemical Process of Ministry of Education East China University of Science and Technology Department of Mathematics East China University of Science and Technology

ISBN: (纸本)9781538629185

This paper focuses on the problem of adaptive output feedback tracking control for a class of nonstrict-feedback nonlinear systems with unknown control coefficients and quantized input. The difficulty from the unknown control direction is solved by using the linear state transformation and the Nussbaum gain function（NGF） approach. Based on the combination of input-driven observer, backstepping technique, neural network（NN） parametrization and variable separation method, a novel adaptive output feedback quantized control scheme involving only one adaptive parameter is developed for such systems. The designed quantized controller ensures that all signals of closed-loop systems are semi-globally uniformly ultimately bounded（SGUUB）, and the tracking error converges to an adjustable neighborhood of the origin. Finally, a numerical example is provided to demonstrate the effectiveness of the proposed control design.

关键词： Nonstrict-feedback systems quantized input signal output feedback adaptive control unknown control direction

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