The Canadian Journal of Chemical Engineering最新文献_第2页

Computational intelligence for empirical modelling and optimization of methylene blue adsorption phenomena utilizing an activated carbon‐supported [Co(NH3)6]Cl3 complex 利用活性炭支撑的[Co(NH3)6]Cl3 复合物对亚甲基蓝吸附现象进行经验建模和优化的计算智能

The Canadian Journal of Chemical Engineering Pub Date : 2024-06-10 DOI: 10.1002/cjce.25363

Kamel Landolsi, F. Echouchene, Ines Chouaieb, Mona A. Alamri, A. Bajahzar, H. Belmabrouk

{"title":"Computational intelligence for empirical modelling and optimization of methylene blue adsorption phenomena utilizing an activated carbon‐supported [Co(NH3)6]Cl3 complex","authors":"Kamel Landolsi, F. Echouchene, Ines Chouaieb, Mona A. Alamri, A. Bajahzar, H. Belmabrouk","doi":"10.1002/cjce.25363","DOIUrl":"https://doi.org/10.1002/cjce.25363","url":null,"abstract":"The study focuses on the efficiency of hexaamminecobalt (III) chloride (HACo, [Co(NH3)6]Cl3) immobilized on activated carbon for removing methylene blue (MB) from water solutions. The primary objective of this study was to assess the sorption performance of HACo immobilized on activated carbon in removing MB from water solutions. Additionally, predictive models were developed to optimize the MB removal percentage. Lastly, the study aimed to determine the optimal conditions for achieving maximum MB removal. Samples were characterized using scanning electron microscopy. Batch sorption experiments were conducted to analyze the impact of MB concentration, adsorbent mass, pH, temperature, and contact time. Predictive models were built using multiple linear regression and neural network techniques, specifically artificial neural networks (ANN) and hybrid ANN–particle swarm optimization (ANN‐PSO). The PSO‐ANN model with a single hidden layer of eight neurons trained using the Levenberg–Marquardt algorithm demonstrated high accuracy in predicting MB removal percentage, with mean absolute percentage error (MAPE) = 0.083788, root mean square error (RMSE) = 0.11441, and R2 = 0.99693. The MB adsorption process followed a mono‐layer with one energy model and a pseudo‐first‐order kinetic model. Optimization using the genetic algorithm revealed that the maximum MB removal percentage of 99.56% is achievable at an MB concentration of 9.36 mg/L, adsorbent mass of 15.72 mg, and temperature of 311.2 K. The study confirms the effectiveness of HACo immobilized on activated carbon for MB removal. The PSO‐ANN predictive model proved superior in accuracy compared to empirical models. Optimization results provide the optimal conditions for maximizing MB removal, offering valuable insights for practical applications.","PeriodicalId":501204,"journal":{"name":"The Canadian Journal of Chemical Engineering","volume":" 908","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141363987","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

Promotion of hydrate formation by multi‐walled carbon nanotubes in ultrasonic compounding system 多壁碳纳米管在超声波复合系统中对水合物形成的促进作用

The Canadian Journal of Chemical Engineering Pub Date : 2024-02-14 DOI: 10.1002/cjce.25213

Xianghan Du, Husheng Jiang, Liyan Shang

{"title":"Promotion of hydrate formation by multi‐walled carbon nanotubes in ultrasonic compounding system","authors":"Xianghan Du, Husheng Jiang, Liyan Shang","doi":"10.1002/cjce.25213","DOIUrl":"https://doi.org/10.1002/cjce.25213","url":null,"abstract":"Multi‐walled carbon nanotubes (MWCNTs) are an excellent hydrate promoter, with their own Brownian motion of nanoparticles effectively shortening hydrate nucleation and accelerating hydrate formation. In this work, the properties of methane hydrate formation in a complex system of MWCNTs, sodium dodecyl sulphate (SDS) and NaCl were investigated. It was shown that the compounding system effectively enhanced the kinetics of methane hydrate formation, and the gas consumption of the reaction reached 0.38 MPa at 100 ppm MWCNTs, an increase of 865.8% compared to the pure water system, effectively promoting methane hydrate. In the complexed system, NaCl significantly enhanced the dispersion of MWCNTs, with 1000 ppm NaCl showing the best kinetic promotion effect. SDS not only increases the gas–liquid contact area through the wall attachment effect, but also enhances the dispersion of MWCNTs by adsorbing on the surface of carbon nanotubes and forming an electronic layer with NaCl. MWCNTs not only improve the mass transfer of the system through Brownian motion, but their large heat transfer coefficients can also effectively conduct the heat generated by the system. However, MWCNTs become agglomerated with increasing concentration, making the kinetic promotion effect weaker and the solution less stable, resulting in shorter shelf life. This study confirmed the effective promotion of hydrate formation by MWCNTs under the ultrasonic compounding system, and also provided a reference for related studies on the compounding of MWCNTs with NaCl.","PeriodicalId":501204,"journal":{"name":"The Canadian Journal of Chemical Engineering","volume":"7 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139778549","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

Estimation of turbulent energy mixing factor in PWR sub‐channel by DNS 利用 DNS 估算压水堆子通道中的湍流能量混合因子

The Canadian Journal of Chemical Engineering Pub Date : 2024-02-06 DOI: 10.1002/cjce.25204

R. K. Singh, Deb Mukhopadhyay, D. Khakhar, J. B. Joshi

{"title":"Estimation of turbulent energy mixing factor in PWR sub‐channel by DNS","authors":"R. K. Singh, Deb Mukhopadhyay, D. Khakhar, J. B. Joshi","doi":"10.1002/cjce.25204","DOIUrl":"https://doi.org/10.1002/cjce.25204","url":null,"abstract":"Turbulent mixing within sub‐channels plays a crucial role in understanding the thermal hydraulics of reactor channels. It serves as an empirical parameter in sub‐channel analysis and has long been a challenge in the nuclear industry. Conducting experiments in this context is challenging due to the stringent requirement of maintaining pressure balance among sub‐channels to prevent convection effects. Fortunately, direct numerical simulation (DNS) is emerging as an invaluable tool for addressing this persistent issue. DNS enables the direct computation of turbulent mixing by analyzing fluctuating lateral velocities, offering a more profound understanding of the underlying phenomena. In this study, DNS was conducted at six Reynolds numbers ranging from 17,640 to 1.5 × 105 in pressurized water reactor (PWR) geometry to investigate the lateral mixing driven by turbulence. By studying intricate mechanisms governing the turbulent mixing, the valuable insights into reactor thermal performance and safety are provided. Furthermore, a correlation for turbulent mixing of energy based on the DNS data has been derived, enhancing our ability to model and predict this critical aspect of reactor behaviour. Additionally, this paper explores temperature fluctuations occurring at the fuel rod surface due to turbulence. A probabilistic distribution for temperature fluctuation under specific reactor conditions is presented.","PeriodicalId":501204,"journal":{"name":"The Canadian Journal of Chemical Engineering","volume":"138 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139859678","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

A review of Faisal Khan's contribution to process monitoring 回顾费萨尔-汗对流程监控的贡献

The Canadian Journal of Chemical Engineering Pub Date : 2024-02-06 DOI: 10.1002/cjce.25206

Md. Tanjin Amin, Yutian Qian

引用次数: 0

Production of esters with numerous applications: Kinetics of Dowex 50W catalyzed transesterification of methyl acetate with three‐ and four‐carbon structured alcohols 生产用途广泛的酯类Dowex 50W 催化醋酸甲酯与三碳和四碳结构醇酯化反应的动力学原理

The Canadian Journal of Chemical Engineering Pub Date : 2024-02-06 DOI: 10.1002/cjce.25203

Bader H. Albusairi, Abdulwahab S. Almusallam, Sami H. Ali, Sabiha Q. Merchant, Ali Y. Bumajdad

{"title":"Production of esters with numerous applications: Kinetics of Dowex 50W catalyzed transesterification of methyl acetate with three‐ and four‐carbon structured alcohols","authors":"Bader H. Albusairi, Abdulwahab S. Almusallam, Sami H. Ali, Sabiha Q. Merchant, Ali Y. Bumajdad","doi":"10.1002/cjce.25203","DOIUrl":"https://doi.org/10.1002/cjce.25203","url":null,"abstract":"In this investigation, a strongly acidic exchange resin was used for the transesterification of methyl acetate with n‐propanol, n‐butanol, and iso‐butanol. Kinetic and equilibrium experiments for the three systems were conducted using a temperature‐controlled batch reactor setup. The effects of the following operating parameters on the transesterification were explored: reaction temperature, catalyst loading, and methyl acetate‐to‐alcohol molar ratio. The conversion of the limiting reactant in the reaction mixture increased with increasing reaction temperature, catalyst loading, and varying reactant proportions from 1:1 to other ratios. It was found that excess methyl acetate would result in higher limiting reactant conversion than using excess alcohol with the same initial molar proportionality between the excess and the limiting reactants. It was found that an increase in the chain length of the alcohol and/or branching suppressed the conversion of the reactants owing to steric hindrance. To mathematically correlate the data, several kinetic models were tested, and the Eley–Rideal model was selected. Accordingly, a reaction mechanism was proposed.","PeriodicalId":501204,"journal":{"name":"The Canadian Journal of Chemical Engineering","volume":"35 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139861173","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

Sustainable process design for heat exchanger network considering inherent safety and process economics 考虑到固有安全性和工艺经济性的热交换器网络可持续工艺设计

The Canadian Journal of Chemical Engineering Pub Date : 2024-02-06 DOI: 10.1002/cjce.25202

Muhammad Athar, A. M. Shariff, Muhammad Imran Rashid, Mahboob Ahmed Aadil, Asim Umer, Muhammad Irfan

{"title":"Sustainable process design for heat exchanger network considering inherent safety and process economics","authors":"Muhammad Athar, A. M. Shariff, Muhammad Imran Rashid, Mahboob Ahmed Aadil, Asim Umer, Muhammad Irfan","doi":"10.1002/cjce.25202","DOIUrl":"https://doi.org/10.1002/cjce.25202","url":null,"abstract":"Process lifecycle has several stages, including process design covered in multiple stages. Process economics is a vital factor in finalizing the process design. Besides economics, inherent safety is an important concept contributing to sustainable process design generation. The inherent safety concept has been applied via equipment characteristics for individual equipment. Since a method considering inherent safety with equipment aspects and process economics has not been available, therefore, a new method has been proposed, namely sustainable process design for heat exchanger network (SPDHEN), to integrate inherent safety, equipment aspects, and process economics. SPDHEN uses indexing to identify the critical heat exchanger, which is then examined via hazard analysis for an explosion. For unacceptable hazards, inherent safety principles are engaged to generate design alternatives for which process economics is examined too. The final design would be inherently safer with the best profit margin. The proposed method has been studied for the ammonia synthesis loop. It is concluded that the explosion hazard has been reduced to a tolerable level by using inherent guide words with a marginal compromise on quantity of ammonia produced, that is, 0.32%. This method is straightforward and can be useful for process engineers to generate sustainable process designs for heat exchanger networks considering safety and process economics simultaneously.","PeriodicalId":501204,"journal":{"name":"The Canadian Journal of Chemical Engineering","volume":"319 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139799066","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

Towards strengthening resilience of organizations by risk management tools: A scientometric perspective on COVID‐19 experience in a healthcare and industrial setting 通过风险管理工具加强组织的复原力：从科学计量学角度看 COVID-19 在医疗保健和工业环境中的经验

The Canadian Journal of Chemical Engineering Pub Date : 2024-02-02 DOI: 10.1002/cjce.25196

Bruno Fabiano, Mariangela Guastaferro, M. Pettinato, Hans J. Pasman

引用次数: 0