检索结果-内蒙古大学图书馆

SHORT-TERM SCHEDULING OF PIPELESS BATCH PLANTS

CHEMICAL engineering RESEARCH & DESIGN 1995年第A4期73卷 431-444页

作者： PANTELIDES, CC REALFF, MJ SHAH, N Cent for Process Systems Engineering Imperial Coll of Science Technology and Medicine London United Kingdom

Pipeless batch plants comprise a number of processing stations of varying functionality (e.g., filling, mixing, reacting and emptying stations). A number of mobile vessels are used to hold material while it is being processed at stations, or being transferred from one station to another. The vessels may have their own built-in motion mechanism, or may be transported by a shared fleet of automated guided vehicles (AGVs). Examples of processes operated in this fashion include lubricants, adhesives, pharmaceuticals and paints manufacturing. In many applications pipeless plants have advantages over more conventional ones because of their increased flexibility with respect to material transfers, and the reduced downtime of processing units caused by product changeovers. However, the full realization of these potential benefits during operation necessitates solving a complex scheduling problem. The solution details the utilization of the processing stations, the transferable vessels, and, where appropriate, the AGVs over the time horizon of interest. This paper presents a systematic and rigorous approach to the optimal detailed shortterm scheduling of pipeless plants. The mathematical formulation of the problem as a mixed-integer linear programme allows recipes of arbitrary complexity to be accommodated while exploiting fully the flexibility of the available plant equipment.

关键词： BATCH processES OPTIMAL SCHEDULING PIPELESS PLANTS

来源：评论

学校读者我要写书评

暂无评论

Application of Taiwo's Recycle Compensator to an Heat Integrated Ammonia Production Plant

引用

IFAC-PapersOnLine 2017年第2期50卷 77-82页

作者： Bamimore, A. Taiwo, O. Process Systems Engineering Laboratory Obafemi Awolowo University Ile-Ife Nigeria

Designing fixed-bed catalytic reactor to have heat integration is a common practice in the process industries. However, such design usually poses control challenges as a result of unusual dynamic behavior of the overall process, such as oscillations and instability. It is shown in this paper that the application of Taiwo's recycle compensator eliminates the undesirable dynamics and leads to a better performance. Thus facilitating the design of more effective control system for heat integrated processes. © 2017

关键词： Recycling Ammonia Uncertainty analysis Catalytic reactor Feedback controller Heat integration Model uncertainties Recycle systems

来源：评论

学校读者我要写书评

暂无评论

Sorption of radioactive strontium on a silica-titania mixed hydrous oxide gel

引用

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 1997年第1期220卷 55-58页

作者： Venkatesan, KA Sasidharan, NS Wattal, PK Process Engineering and Systems Development Division Bhabha Atomic Research Centre Mumbai India

A silica-titania (Si-Ti) mixed hydroxide gel with Ti to Si mole ratio of 1 : 1 was prepared Studies on the sorption of radiostrontium from alkaline solutions having various concentrations of sodium were carried out with Si-Ti. The distribution coefficient (K-d) of strontium decreased with increasing concentrations of sodium from 0.1 to 4.0 ***(-3). The plot of log K-d versus log [Na+] gave a slope of -0.55 as against the theoretical value of -2.0. This suggests that some other paths in addition to the simple stoichiometric ion exchange is also existing for sorption. From pH titrations the pH(pzc) of Si-Ti was found to be 4.22 coinciding nearly with the pH sorption edge. An attempt was made to correlate the sorption results with the surface characteristics of the sort,ent. It was found that sorption is favored when the surface of the sorbent transforms into an anionic form. Sharp increase in the sorption of strontium was observed when the equilibrium pH was between 7 and 10. This behavior could be attributed to the abrupt increase in net negative charge on the surface of the sorbent.

关键词： Sorption

来源：评论

学校读者我要写书评

暂无评论

Multi-objective Optimization for the Operation of a Physicochemical Phosphorus Removal System 7th

Multi-objective Optimization for the Operation of a Phys...

引用

7th Ibero-American Congress on Smart Cities, ICSC-Cities 2024

作者： Caro, Florencia Rossit, Diego Santiviago, Claudia Ferreira, Jimena Nesmachnow, Sergio Biotechnological Processes for the Environment Group Faculty of Engineering Universidad de la República Montevideo11300 Uruguay -CONICET Bahía Blanca8000 Argentina Chemical and Process Systems Engineering Group Faculty of Engineering Universidad de la República Montevideo11300 Uruguay Heterogeneous Computing Laboratory Faculty of Engineering Universidad de la República Montevideo11300 Uruguay Universidad de la República Montevideo Uruguay

ISBN: (纸本)9783031853234

The Industry 4.0 paradigm has emerged to enhance the efficiency, productivity, and adaptability of industrial processes. Within this context, process optimization plays a crucial role. This work introduces a novel bi-objective nonlinear mathematical programming (NLP) model aimed at optimizing the operation of a physicochemical phosphorus removal system of an industrial wastewater treatment plant (WWTP). The model seeks to simultaneously minimize both the process costs and the amount of phosphorus discharged into water bodies, addressing significant environmental concerns. A simulation model was developed using commercial software to estimate the phosphorus concentration and pH levels of the treated effluent and an approximation function was derived to be used in the NLP model. Computational experiments confirmed the competitiveness of the proposed model which is solved using two different bi-objective methods. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Multiobjective optimization

来源：评论

学校读者我要写书评

暂无评论

In-situ synthesis of interconnected SWCNT/OMC framework on silicon nanoparticles for high performance lithium-ion batteries

引用

Green Energy & Environment 2016年第1期1卷 91-99页

作者： Weiwei Li Shimou Chen Jia Yu Daliang Fang Baozeng Ren Suojiang Zhang School of Chemical Engineering and Energy Zhengzhou University Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of Sciences

In spite of silicon has a superior theoretical capacity, the large volume expansion of Si anodes during Li^+ insertion/extraction is the bottle neck that results in fast capacity fading and poor cycling performance. In this paper, we report a silicon, single-walled carbon nanotube, and ordered mesoporous carbon nanocomposite synthesized by an evaporation-induced self-assembly process, in which silicon nanoparticles and single-walled carbon nanotubes were added into the phenolic resol with F-127 for co-condensation. The ordered mesoporous carbon matrix and single-walled carbon nanotubes network could effectively accommodate the volume change of silicon nanoparticles, and the ordered mesoporous structure could also provide efficient channels for the fast transport of Li-ions. As a consequence, this hybrid material exhibits a reversible capacity of 861 mAh g^(-1) after 150 cycles at a current density of 400 mAg^(-1). It achieves significant improvement in the electrochemical performance when compared with the raw materials and Si nanoparticle anodes.

关键词： Silicon Single-walled carbon nanotube Ordered mesoporous carbon Lithium ion battery

来源：评论

学校读者我要写书评

暂无评论

Robust Optimization of Dynamical systems with Correlated Random Variables using the Point Estimate Method

引用

IFAC-PapersOnLine 2018年第2期51卷 427-432页

作者： Xie, Xiangzhong Krewer, Ulrike Schenkendorf, René Institute of Energy and Process Systems Engineering Braunschweig University of Technology Braunschweig38106 Germany Braunschweig University of Technology Braunschweig38106 Germany for Advanced Methods in Process and Systems Engineering Magdeburg39106 Germany

Robust optimization of dynamical systems requires the proper uncertainty quantification. Monte Carlo simulations and polynomial chaos expansion are frequently used methods for uncertainty quantification and have been applied to a number of problems in process design and optimization. Both methods, however, are either computationally prohibitive for robust optimization or inappropriate for correlated random variables. The aim of this study is to introduce the point estimate method for optimization of dynamical systems with correlated random variables. The point estimate method requires only a few deterministic evaluations of the analyzed process model and estimates the statistical moments for robust optimization. The derived sample points can be adapted to random variables of arbitrary distributions and correlations. The contribution of this paper consists of presenting the point estimate method for correlated random variables in the field of model-based robust process design. The performance of the method is demonstrated with a case study of a continuous tubular reactor. © 2018

关键词： Uncertainty analysis Dynamical systems Estimation Intelligent systems Monte Carlo methods Optimization process design Random variables Arbitrary distribution Continuous tubular reactors Correlated model Design and optimization Point estimate method Polynomial chaos expansion Robust optimization Uncertainty quantifications

来源：评论

学校读者我要写书评

暂无评论

CO2 adsorption on microporous metal–organic frameworks unraveled by high-resolution X-ray computed tomography

e-Journal of Nondestructive Testing

引用

e-Journal of Nondestructive Testing 2025年第2期30卷

作者： Karmoker, Diponker Martinez-Garcia, Jorge Gwerder, Damian Fumey, Benjamin Borgschulte, Andreas Schuetz, Philipp Competence Centre for Thermal Energy Systems and Process Engineering Lucerne University of Applied Sciences and Arts Horw Switzerland Competence Centre for Thermal Energy Storage Lucerne University of Applied Sciences and Arts Horw Switzerland Department of Civil Engineering Indian Institute of Technology Roorkee Uttarakhand India Chemical Energy Carriers and Vehicle Systems Laboratory Empa - Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf8600 Switzerland Department of Chemistry University of Zürich Winterthurerstrasse 190 Zürich8057 Switzerland

The continuous increase in atmospheric carbon dioxide (CO2) concentration has triggered global warming and climate change. Strong policies and novel, cost-effective CO2 control methods have been developed to mitigate these issues over the last years. Metal-organic frameworks (MOFs) have emerged as one of the most rapidly advancing areas of research in chemistry, driven by advancements in synthesis, structure determination, interdisciplinary research, and broadening applications. MOFs porous materials demonstrate significant CO2 capture and conversion capabilities due to their tunable physical and chemical properties. Characterization of the MOF’s pore structure and its effect on CO2 adsorption are crucial to understanding the CO2 storage mechanisms and, thus, for optimal MOF design. This study uses X-ray computed tomography (XCT) to investigate non-destructively how CO2 is adsorbed on MOF’s particles. This contribution presents the characterization of the micron-scale pore structure of a single MOF particle. The collected imaging data is used to calculate the effective permeability along the MOF’s particle through numerical simulations. Findings reveal that the pore connectivity decreases with the particle penetration length, thus reducing the available surface area for adsorption. Additionally, the permeability near the particle surface is found to be 6.39 times higher than inside the particle. Potential CO2 location sites at the particle surfaces were also identified and visualized. © 2025, null. All rights reserved.

关键词： Tropics

来源：评论

学校读者我要写书评

暂无评论

Simultaneous desulfurization and denitrogen of liquid fuels using two functionalized group ionic liquids

引用

Science China Chemistry 2014年第12期57卷 1766-1773页

作者： NIE Yi GONG Xue GAO Hong Shuai ZHANG Xiang Ping ZHANG Suo Jiang Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences College of Chemistry and Chemical Engineering Qufu Normal University

Deep desulfurization of liquid fuels is an important and challenging issue in worldwide petroleum refining *** and catalytic oxidative desulfurization(ECODS)of liquid fuels using a series of ionic liquids(ILs)with two functionalized groups,such as[(CH2)2COOHmim]Cl/n Fe Cl3,[(CH2)2COOHmim]Cl/n Zn Cl2,and[Amim]Cl/n Fe Cl3,was *** the ECODS,the ILs were used as both extractant and catalyst and 30 wt%hydrogen peroxide(H2O2)solution as *** effects of molar ratios of[(CH2)2COOHmim]Cl(or[Amim]Cl)to Fe Cl3(or Zn Cl2)in ILs,H2O2/sulfur(O/S)molar ratio,reaction temperature,and the nature of sulfur compounds on sulfur removal were *** natures of the functional groups(–COOH,–CH2–CH=CH2)in cations and the acid strength of anions play important roles in the ECODS and affect the reaction time,temperature,and desulfurization efficiency of different ***,nitrogen-containing compounds(pyridine,pyrrole,and quinoline)could be removed simultaneously in the ECODS and had different effects on dibenzothiophene removal.

关键词： ionic liquids desulfurization denitrogen fuel

来源：评论

学校读者我要写书评

暂无评论

A novel metal hydride reactor design: The effect of using copper, AlN and AlSi10Mg composite fins on the dehydrogenation process of LaNi 5 -Metal alloy

引用

International Journal of Hydrogen Energy 2025年 141卷 118-132页

作者： Atef Chibani Chahrazed Boucetta Mohammed Amin Nassim Haddad Ali Boukhari Issam Fourar Slimane Merouani Riad Badji Samir Adjel Sihem Belkhiria Moustafa Boukraa Cherif Bougriou Research Center in Industrial Technologies CRTI P.O.Box 64 Cheraga 16014 Algiers Algeria Faculty of Exact Sciences and Sciences of Nature and Life Department of Material Sciences University of Larbi Ben M'hidi Oum El Bouaghi 04000 Algeria LMSEA Mechanical Engineering Department National Polytechnic School of Constantine Constantine 25000 Algeria UDERZA Unit Faculty of Technology University of El Oued 39000 El Oued Algeria Laboratory of Environmental Process Engineering Department of Chemical Engineering Faculty of Process Engineering University Salah Boubnider Constantine 3 P.O. Box 72 25000 Constantine Algeria University of Monastir Faculty of Sciences Laboratory of Thermal and Energetic Systems Studies LR99ES31 5019 Monastir Tunisia Mechanical Engineering Department Faculty of Technology University of Mostefa Ben Boulaid Batna 2 05000 Batna Algeria

The optimal design of solid-state hydrogen storage devices is crucial for their effectiveness. This study investigates the thermal management of LaNi 5 -based metal hydride reactors for solid-state hydrogen storage by incorporating various fin materials: copper, aluminum nitride (AlN), and Aluminum Silicon Magnesium (AlSi10Mg). Utilizing ANSYS FLUENT 15.0 for simulations within a 2D numerical model, User-Defined Functions (UDFs) were employed to access the dehydrogenation process over a half-hour period. The reactor is subjected to an initial temperature of 363 K and heating oil is introduced at a speed of 1 m/s pressures ranging from 1 to 2 bar. The impact of different fin materials on enhancing the reactor's desorption properties was evaluated through key metrics such as hydrogen concentration, forced convection heat transfer coefficient, and average reactor temperature. Results demonstrate a remarkable improvement in hydrogen desorption rates, where copper fins achieve up to 67.6 % reduction in time to reach equilibrium at 1 bar compared to the reactor without fins. Similarly, AlN and AlSi10Mg fins exhibit a 64 % and 62 % reduction, respectively, highlighting their contributions to improved reactor performance. This research contributes to the advancement of hydrogen storage technologies by offering insights into the selection of fin materials and design for efficient.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Slug frequency in high viscosity liquid and gas flow in horizontal pipes

Slug frequency in high viscosity liquid and gas flow in hori...

引用

16th International Conference on Multiphase Production Technology 2013

作者： Zhao, Y. Yeung, H. Lao, L. Process Systems Engineering Group Department of Offshore Process and Systems Engineering Cranfield University United Kingdom

ISBN: (纸本)9781629932958

Slug flow is one of the commonly encountered liquid and gas two-phase flow patterns. The accurate prediction of its behaviours is crucial for practical engineering applications. Liquid viscosity and pipe diameter are found to have significant impacts on slug frequency, but available data for high viscosity liquid which has a viscosity above 1.0 Pa s might be still scarce. In the present work, slug frequency in high viscosity liquid and gas slug flows is studied. Experiments are performed in 0.026 m ID and 0.074 m ID horizontal pipes with a liquid viscosity range of 1.0 Pa s to 7.5 Pa s. Results are discussed in terms of viscosity and diameter effects, and compared with existing models. A new correlation is proposed to predict slug frequency for high viscosity liquid and gas flows. © BHR Group 2013.

关键词： Liquids

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：