Chemical Product and Process Modeling最新文献_第9页

Frontmatter Frontmatter

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Chemical Product and Process Modeling Pub Date : 2021-12-01 DOI: 10.1515/cppm-2021-frontmatter4

引用次数: 0

Development of a CFD-based simulation model and optimization of thermal diffusion column: application on noble gas separation 基于CFD的热扩散柱模拟模型的开发与优化：在惰性气体分离中的应用

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Chemical Product and Process Modeling Pub Date : 2021-11-19 DOI: 10.1515/cppm-2021-0049

Hamed Eghbalahmadi, P. Khadiv-Parsi, S. M. Mousavian, M. H. Eghbal Ahmadi

{"title":"Development of a CFD-based simulation model and optimization of thermal diffusion column: application on noble gas separation","authors":"Hamed Eghbalahmadi, P. Khadiv-Parsi, S. M. Mousavian, M. H. Eghbal Ahmadi","doi":"10.1515/cppm-2021-0049","DOIUrl":"https://doi.org/10.1515/cppm-2021-0049","url":null,"abstract":"Abstract In this study, numerical simulations were carried out to investigate the separation of the helium-argon gas mixture by thermal diffusion column. This research determined the significant parameters and their effects on the process performance. Effects of feed flow rate, cut ratio, and hot wire temperature in a 950 mm height column with an inner tube of 9.5 mm radius were examined through the simulation of the thermal diffusion column. For minimizing the number of simulations and obtaining the optimum operating conditions, response surface methodology (RSM) was used. Analysis of separative work unit (SWU) values as a target function for helium-argon separation clearly showed that the maximum amount of SWU in thermal diffusion column was achieved, when hot wire temperature increased as large as technically possible, and the feed rate and cut ratio were equal to 55 Standard Cubic Centimeters per Minute (SCCM) and 0.44, respectively. Finally, the SWU value in optimum conditions was compared with the experimental data. Results illustrated that the experimental data were in good agreement with simulation data with an accuracy of about 90%.","PeriodicalId":9935,"journal":{"name":"Chemical Product and Process Modeling","volume":"18 1","pages":"97 - 115"},"PeriodicalIF":0.9,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43019531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An improved Wilson equation for phase equilibrium K values estimation 一种用于相平衡K值估计的改进Wilson方程

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Chemical Product and Process Modeling Pub Date : 2021-11-16 DOI: 10.1515/cppm-2021-0009

W. Monnery

{"title":"An improved Wilson equation for phase equilibrium K values estimation","authors":"W. Monnery","doi":"10.1515/cppm-2021-0009","DOIUrl":"https://doi.org/10.1515/cppm-2021-0009","url":null,"abstract":"Abstract Phase equilibrium K values are either estimated with empirical correlations or rigorously calculated based on fugacity values determined from an equation of state. There have been several empirical analytical equations such as Raoult’s Law, the Hoffman Equations (Hoffman A, Crump J, Hocott C. Equilibrium constants for a gas condensate system. J Petrol Technol 1953;5:1–10) and their modifications and the well-known Wilson Equation (Wilson G. A modified Redlich–Kwong equation of state applicable to general physical data calculations. In: AIChE National Meeting Paper15C, May 4–7, Cleveland, OH; 1969). along with several modifications. This work presents a new modification of the Wilson Equation for estimating phase equilibrium K values, predominantly for light hydrocarbon mixtures. The modification is based on correlating a subset of a database of K values, established from convergence pressure data. Results show the method to accurately correlate and predict the K value data, within 10% on average. Moreover, the predicted K factors provide remarkable results for such a simple model when used in a variety of phase equilibrium calculations. The results also show that the new model compares favorably with existing empirical analytical methods. Such a model would provide excellent initial estimates for rigorous thermodynamic calculations.","PeriodicalId":9935,"journal":{"name":"Chemical Product and Process Modeling","volume":"17 1","pages":"365 - 377"},"PeriodicalIF":0.9,"publicationDate":"2021-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44460253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An enhancement in series cascade control for non-minimum phase system 非最小相位系统串级控制的改进

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Chemical Product and Process Modeling Pub Date : 2021-10-25 DOI: 10.1515/cppm-2021-0046

Manish Yadav

引用次数: 1

Modelling and simulation of industrial multistage flash desalination process with exergetic and thermodynamic analysis. A case study of Azzour seawater desalination plant 基于火用和热力学分析的工业多级闪蒸脱盐过程建模与仿真。以Azzour海水淡化厂为例

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Chemical Product and Process Modeling Pub Date : 2021-10-25 DOI: 10.1515/cppm-2021-0040

Abdullah H. Almerri, M. Al‐Obaidi, S. Alsadaie, I. Mujtaba

{"title":"Modelling and simulation of industrial multistage flash desalination process with exergetic and thermodynamic analysis. A case study of Azzour seawater desalination plant","authors":"Abdullah H. Almerri, M. Al‐Obaidi, S. Alsadaie, I. Mujtaba","doi":"10.1515/cppm-2021-0040","DOIUrl":"https://doi.org/10.1515/cppm-2021-0040","url":null,"abstract":"Abstract Despite the fact of being intensive energy consumption, MSF is a mature technology that characterised by a high production capacity of high-quality water. The multistage flash (MSF) desalination process is one of the prominent thermal desalination used in the industry of seawater desalination to produce high quantity and high quality of freshwater. However, this process consumes large amount of energy and faces thermal limitations due to its high degree of exergy destruction at several units of the process. Therefore, the research of MSF is still existed to elevate the performance indicators and to resolve the concern of high energy consumption. To rectify these limitations, it is important to determine the units responsible in dissipating energy. This study aims to model an industrial MSF process validated against real data and then investigate the exergy destruction and thermodynamic limitations of the process. As a case study, Azzour MSF seawater desalination plant, located in Al Khiran in Kuwait is under the focus. A comprehensive model is developed by analysing several published models. Specifically, the calculation of exergy destruction has embedded both physical and chemical exergies that identified as a strong point of the model developed. As expected, the highest exergy destruction (55.5%) occurs within the heat recovery section followed by the brine heater with exergy destruction of 28.26% of the total exergy destruction. This study identifies the sections of the industrial process that cause the highest energy losses.","PeriodicalId":9935,"journal":{"name":"Chemical Product and Process Modeling","volume":"18 1","pages":"73 - 95"},"PeriodicalIF":0.9,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48050090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Appling the computational fluid dynamics studies of the thermogravitational column for N2-CO2 and He-Ar gas mixtures separation 应用热重塔对N2-CO2和He-Ar混合气体分离的计算流体力学研究

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Chemical Product and Process Modeling Pub Date : 2021-10-11 DOI: 10.1515/cppm-2021-0036

Hesam Salimi, Neda Hashemipour, J. Karimi-Sabet, Younes Amini

引用次数: 4

An enhanced feedback-feedforward control scheme for process industries 一种用于过程工业的增强反馈-前馈控制方案

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Chemical Product and Process Modeling Pub Date : 2021-09-03 DOI: 10.1515/cppm-2021-0016

Manish Yadav, H. Patel

引用次数: 0

Nonlinear autoregressive-moving average-L2 (NARMA-L2) controller for multivariable ball mill plant 多变量球磨厂非线性自回归移动平均l2 (NARMA-L2)控制器

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Chemical Product and Process Modeling Pub Date : 2021-08-23 DOI: 10.1515/cppm-2021-0031

R. Bustamante, Beatriz S. M. Bastos, J. S. de Oliveira, B. F. Santos

{"title":"Nonlinear autoregressive-moving average-L2 (NARMA-L2) controller for multivariable ball mill plant","authors":"R. Bustamante, Beatriz S. M. Bastos, J. S. de Oliveira, B. F. Santos","doi":"10.1515/cppm-2021-0031","DOIUrl":"https://doi.org/10.1515/cppm-2021-0031","url":null,"abstract":"Abstract Mineral processing facilities concern an enormous amount of dynamically complex unit operations (due to nonlinearities), for instance ball mill system. Normally, these processes need multivariable controllers to smooth actions by designing for plant constraints such as deadtimes and dynamics interactions. The present work presents a comparison between a classical PI and nonlinear moving average autoregressive-linearization level 2 (NARMA-L2) controllers based on artificial neural network (ANN) for a ball mill system. The manipulated variables of this plant are the rotation velocity (Vr) and the feeding weight (Wf), while the controlled parameters are the hold up (HU) and the mass fraction under 45 μm (P45). The simulation was built in the MATLAB software (Simulink), comparing the actions of PI and NARMA-L2 controllers in the face of operational changes in specific regions (constraints). The performance of proposed controllers was verified by the integral of absolute error (IAE), integral of squared error (ISE), or the integral of time-weighted absolute error (ITAE). The results of simulation showed the validity of the model obtained and the control technique proposed in this paper, which contributes to studies of multivariate controller designs for ball mills with significant applications. Additionally, this paper brings a first hybrid approach (PI/NARMA-L2) with successful implementation described in the literature.","PeriodicalId":9935,"journal":{"name":"Chemical Product and Process Modeling","volume":"18 1","pages":"1 - 17"},"PeriodicalIF":0.9,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43485883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environmental and thermodynamic performance assessment of biomass gasification process for hydrogen production in a downdraft gasifier 下吸式气化器中生物质气化制氢过程的环境和热力学性能评估

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Chemical Product and Process Modeling Pub Date : 2021-07-30 DOI: 10.1515/cppm-2021-0029

Tayebeh Marzoughi, F. Samimi, M. Rahimpour

{"title":"Environmental and thermodynamic performance assessment of biomass gasification process for hydrogen production in a downdraft gasifier","authors":"Tayebeh Marzoughi, F. Samimi, M. Rahimpour","doi":"10.1515/cppm-2021-0029","DOIUrl":"https://doi.org/10.1515/cppm-2021-0029","url":null,"abstract":"Abstract Gasification is one of the most efficient techniques for sustainable hydrogen production from biomass. In this study, a comparative performance analysis of the gasification process using various types of biomass materials was undertaken via thermodynamic approach. Air, steam, and air/steam as the traditional gasifying agents were applied to provide an opportunity to choose the most proper agent in the process. This paper also evaluates the environmental impacts of the process in terms of CO2 emission by using Aspen Energy Analyzer. The effects of agent to biomass molar ratio, agent inlet temperature, moisture content of biomass material, and gasification temperature were estimated based on the producer gas compositions, hydrogen yield and heating values. The results indicate that the highest hydrogen yield (0.074 g H2/g biomass) was obtained in the steam gasification of plastic, while air gasification of paper generates the lowest one. It was also observed that manure is the most beneficial from environmental perspectives, while tire and plastic have the highest contribution to CO2 emission and consequently global warming. The higher values of hydrogen production and LHV of produced gas are associated respectively with using steam, air/steam, and air as the gasification agents. The lowest value of CO2 emission is obtained for air, air/steam, and steam as the gasifying agents, respectively.","PeriodicalId":9935,"journal":{"name":"Chemical Product and Process Modeling","volume":"17 1","pages":"637 - 654"},"PeriodicalIF":0.9,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/cppm-2021-0029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41812370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A comparative study of various Smith predictor configurations for industrial delay processes 工业延迟过程中各种Smith预估器配置的比较研究

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Chemical Product and Process Modeling Pub Date : 2021-07-28 DOI: 10.1515/cppm-2021-0026

Vijaya Lakshmi Korupu, Manimozhi Muthukumarasamy

引用次数: 7