Canadian Journal of Chemical Engineering最新文献_第6页

Foamability of all-green polylactide/rice straw pulp biocomposites through continuous extrusion process: Effects of pulping and reactive compatibilization 通过连续挤压工艺获得的全绿色聚乳酸/稻草浆生物复合材料的发泡性：打浆和反应性复合的影响

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-23 DOI: 10.1002/cjce.25361

Danial Abbasi, Mahdis Jafari, Pedram Bahrami, Farkhondeh Hemmati, Jamshid Mohammadi-Roshandeh

{"title":"Foamability of all-green polylactide/rice straw pulp biocomposites through continuous extrusion process: Effects of pulping and reactive compatibilization","authors":"Danial Abbasi, Mahdis Jafari, Pedram Bahrami, Farkhondeh Hemmati, Jamshid Mohammadi-Roshandeh","doi":"10.1002/cjce.25361","DOIUrl":"10.1002/cjce.25361","url":null,"abstract":"In the present work, the processability of poly(lactic acid) (PLA) in the extrusion foaming process was improved by using rice straw (RS) as an agricultural waste. In order to extrude a sustainable lightweight foam, the soda-pulping and bleaching modification were performed on the RS particles, which resulted in the attainment of purified micron-sized cellulosic fibre with higher aspect ratio. The addition of these fibres, with larger interfacial area between filler and matrix, to the PLA melt enhanced the foam void fraction and cell density more than one order of magnitude. The use of a reactive compatibilizer in the biocomposite showed further beneficial effects on the PLA foamability. The used reactive compatibilizer, with the ability of simultaneous reactions with the end groups of PLA macromolecules and hydroxyl groups of the lignocellulosic pulp, in the biocomposite noticeably improved the viscoelastic properties of melt and lengthened the macromolecule relaxation times. As a result, the biocomposite melt with higher melt strength was obtained, which kept the melt integrity during the bubble growth stage, hindered the cell coalescence, and retained a larger volume of gas inside the melt. Contrary to these influences, the compatibilization activity of this additive weakened the heterogeneous nucleation role of the cellulosic fibres. However, by choosing proper pulp loading, the extrusion of a lightweight biodegradable PLA-based biocomposite foam can be feasible, which can be used in interior construction applications.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 1","pages":"206-219"},"PeriodicalIF":1.6,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical investigation on mixing behaviour in the contact zone of an industrial-scale dissolved air flotation tank 工业规模溶气浮选槽接触区混合行为的数值研究

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-23 DOI: 10.1002/cjce.25365

Xiuzhen Chen, Jingdong Huang, Yubing Hao

{"title":"Numerical investigation on mixing behaviour in the contact zone of an industrial-scale dissolved air flotation tank","authors":"Xiuzhen Chen, Jingdong Huang, Yubing Hao","doi":"10.1002/cjce.25365","DOIUrl":"10.1002/cjce.25365","url":null,"abstract":"The mixing behaviour of the wastewater and the recycle bubbly water in the contact zone could affect the separation performance of dissolved air flotation systems. In this study, the mixing characteristics in the contact zone of an industrial-scale dissolved air flotation tank were investigated using the computational fluid dynamics method. At first, the influence of the turbulence model on the simulation results was clarified. It is demonstrated that the realizable k-ε model could predict the gas holdup distribution with better accuracy, and the maximum relative deviation between the predicted gas holdup and the experimental results is only 10%. The influence of the geometry and operating parameters on the mixing process was then studied numerically. It is found that the mixing performance in the contact zone could be improved by decreasing the height position of the nozzle inlet in a certain range. The reason is that microbubbles disperse better in the bottom region and a double circulation flow state forms in the contact zone when the nozzle inlet is installed at a low height. Additionally, the mixing process could be further enhanced by decreasing the diameter of the nozzle inlet. As to the operating conditions, increasing the recycle ratio could not only increase the gas holdup but also improve the mixing performance in the contact zone. When the recycle flow rate remains constant, increasing the wastewater flow rate will lead to a decrease in gas holdup and deterioration of the mixing effect.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 1","pages":"457-467"},"PeriodicalIF":1.6,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inline monitoring of lactobionic acid production from cheese whey by Pseudomonas taetrolens in a stirred bioreactor using electrical conductivity 利用电导率在线监测假单胞菌在搅拌式生物反应器中从奶酪乳清中产生乳糖酸的情况

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-23 DOI: 10.1002/cjce.25367

Roberta Romano, Federico Alberini, Noura Raddadi, Fabio Fava, Alessandro Paglianti

{"title":"Inline monitoring of lactobionic acid production from cheese whey by Pseudomonas taetrolens in a stirred bioreactor using electrical conductivity","authors":"Roberta Romano, Federico Alberini, Noura Raddadi, Fabio Fava, Alessandro Paglianti","doi":"10.1002/cjce.25367","DOIUrl":"10.1002/cjce.25367","url":null,"abstract":"In this study, we introduce a novel experimental approach and present a simplified mathematical model for a quick monitoring of a biotec process producing lactobionic acid (LBA). It relies on monitoring the electrical conductivity of the fermentation broth and it is designed to predict the concentration of LBA throughout the microbial cheese whey valorization via LBA production. Following a systematic series of experiments conducted to refine the mathematical model, we performed conductivity monitoring during LBA production from “caciotta” and “squacquerone” wheys by Pseudomonas taetrolens in a 3 L stirred tank bioreactor. Throughout the bioproduction process, the conductivity values exhibited an upward trend corresponding to the increase in LBA concentration. Our findings underscore the feasibility and advantages of employing inline conductivity monitoring during LBA production from various cheese wheys. The results emphasize that conductivity measurements can effectively estimate product concentration in a fermentation process, particularly when there is a shift in ionic concentration. Furthermore, these conductivity measurements offer valuable insights for monitoring and optimizing the working conditions in a fermentation process.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 1","pages":"373-384"},"PeriodicalIF":1.6,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal design of coolant jacket for cryogen transfer pipelines 低温输送管道冷却剂夹套的优化设计

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-20 DOI: 10.1002/cjce.25368

Sajikumar Pillai Sivasree, Baby Nitin

{"title":"Optimal design of coolant jacket for cryogen transfer pipelines","authors":"Sajikumar Pillai Sivasree, Baby Nitin","doi":"10.1002/cjce.25368","DOIUrl":"10.1002/cjce.25368","url":null,"abstract":"Cryogenic liquids such as liquid oxygen and liquid hydrogen are extensively used in many processes and manufacturing industries. In these industries, transferring cryogens via pipelines is a routine phenomenon. As the boiling points and latent heat of cryogens are low, excessive vaporization of these cryogens is innate. Therefore, ensuring that the cryogen reaches the utility in its liquid form is challenging. In the case of liquid hydrogen and liquid helium, the pipelines are jacketed with a high boiling cryogen like nitrogen. The idea is to dump most of the heat into cheap nitrogen to limit the loss of precious hydrogen or helium. From a heat inleak point, maximizing the amount of nitrogen in the jacket is advantageous by choosing large cross-sectional areas. Also, larger flow cross sections would lower pressure drops and, therefore, lower pumping costs. However, such a choice would add to the mass of the pipeline. An increase in the mass of the pipeline increases the need for better structural support of the pipeline assembly. Therefore, the design of cryogen jackets for limiting heat inleak is a multi-objective optimization problem. In this work, we model the heat leak into the hydrogen via the nitrogen jacket and the pressure drop of liquid nitrogen, and we find the mass of the pipeline assembly. Then, we optimize the design of nitrogen jackets fitted over hydrogen pipelines. We employ the evolutionary optimization technique, genetic algorithm (GA), to perform this optimization.cryogen; genetic algorithm; heat inleak; liquid hydrogen; optimization.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"102 11","pages":"3867-3878"},"PeriodicalIF":1.6,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141514188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the efficiency of two-stage cyclones without increasing pressure drop by optimizing inlet and outlet dimensions 通过优化入口和出口尺寸，在不增加压降的情况下提高两级旋风分离器的效率

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-18 DOI: 10.1002/cjce.25356

Jiongjie He, Zhenxing Zhu, Hongbin Niu, Zhihong Tian, Jingxuan Yang, Guogang Sun

{"title":"Enhancing the efficiency of two-stage cyclones without increasing pressure drop by optimizing inlet and outlet dimensions","authors":"Jiongjie He, Zhenxing Zhu, Hongbin Niu, Zhihong Tian, Jingxuan Yang, Guogang Sun","doi":"10.1002/cjce.25356","DOIUrl":"https://doi.org/10.1002/cjce.25356","url":null,"abstract":"Efforts to enhance cyclone separators aim to minimize gas energy consumption while improving separation efficiency. This study attempts to achieve this goal for cyclones arranged in series using straightforward methods. Experimental and numerical simulation analyses were performed to study the effect of matching inlet and outlet diameters on the performance of a two-stage tandem cyclone separator. The results show that the matching method, in which the inlet gas velocities of both stages are higher than the outlet gas velocity, has a better separation efficiency. The efficiency and pressure drop models of the two-stage cyclones in series were constructed using the response surface methodology (RSM) to obtain the optimal combination of inlet size and exhaust pipe diameter. Experimental tests showed that the accuracy of this model was reasonable. At different permitted pressure drops, the optimized structure revealed that: (1) The inlet area should be smaller than the outlet area for each cyclone stage. (2) The secondary inlet size (KA) should be as large as possible. (3) dr decreases while KA increases in each step.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"102 12","pages":"4371-4385"},"PeriodicalIF":1.6,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Domain adaptation via gamma, Weibull, and lognormal distributions for fault detection in chemical and energy processes

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-18 DOI: 10.1002/cjce.25373

Lingkai Yang, Jian Cheng, Yi Luo, Tianbai Zhou, Xiaoyu Zhang, Linsong Shi, Yuan Xu

{"title":"Domain adaptation via gamma, Weibull, and lognormal distributions for fault detection in chemical and energy processes","authors":"Lingkai Yang, Jian Cheng, Yi Luo, Tianbai Zhou, Xiaoyu Zhang, Linsong Shi, Yuan Xu","doi":"10.1002/cjce.25373","DOIUrl":"https://doi.org/10.1002/cjce.25373","url":null,"abstract":"The burgeoning development of supervised machine learning (ML) has led to its widespread applications in chemical and energy processes, such as fault detection. However, in some scenarios, collecting labelled data can be costly, hazardous, or impossible. Moreover, data of the same process can follow varying distributions due to changes in, for example, devices and environment, causing ML models to be ineffective. These challenges pose a domain adaptation task, necessitating the refinement of existing ML models to tackle issues from related applications. This study proposes a domain adaptation approach to address label scarcity and data distribution variation. The method has three stages: data distribution modelling (knowledge discovery), adaptation of target domain samples to source domains (knowledge transformation), and classifier ensemble for fault detection (knowledge fusion). Gamma, Weibull, and lognormal distributions are applied for data modelling and domain adaptation. The effectiveness of the method is validated on synthetic datasets and then applied to identify anomalies in coal mine pressure data and detect faults in the Tennessee Eastman (TE) process.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 1","pages":"359-372"},"PeriodicalIF":1.6,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-hydraulic analysis of wavy microchannel heat sinks with porous fins based on field synergy principle

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-18 DOI: 10.1002/cjce.25371

Hao Dai, Ling Wang, Yingwen Liu

{"title":"Thermo-hydraulic analysis of wavy microchannel heat sinks with porous fins based on field synergy principle","authors":"Hao Dai, Ling Wang, Yingwen Liu","doi":"10.1002/cjce.25371","DOIUrl":"https://doi.org/10.1002/cjce.25371","url":null,"abstract":"In order to enlarge the area and intensity of convective heat transfer among the coolant and heated surface, the vertical fins of microchannel heat sinks (MCHSs) with microencapsulated phase change material slurry (MPCMS) as coolant are arranged into wavy porous channels to realize more heat being dissipated to the outside. The phase transition of microencapsulated particles in laminar flow state is described, and the Brinkman–Forchheimer–Darcy model based on volume average approach and the energy equation for local heat equilibrium are adopted to portray flow and heat transfer in porous medium. The impacts of geometrical parameters on flow and heat transfer behaviour of wavy porous MCHS are numerically analyzed, and performance evaluation factor (PEF) is defined to estimate the thermo-hydraulic capability of heat exchanger. The numeric outcomes match well with the experiments. Results indicate that MPCMS has a significant heat transfer improvement in the newly designed channel configuration compared with the coolant fluid flowing in the straight microchannel. Based on field synergy principle, the comprehensive capability enhancement mechanism of MPCMS in new MCHS is explored, and its superior thermal performance can be attributed to the improvement of the synergistic degree among flow and temperature fields, and its reasonable structural design can effectively improve the heat rejection capacity in the limited space.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 1","pages":"427-441"},"PeriodicalIF":1.6,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of particle size distribution of haematite-based drilling fluid on perlite functionality 基于赤铁矿的钻井液的粒度分布对珍珠岩功能的影响

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-17 DOI: 10.1002/cjce.25364

Jaber Al Jaber, Badr Bageri, Yazeed Alshehri, Waleed Otain

{"title":"The impact of particle size distribution of haematite-based drilling fluid on perlite functionality","authors":"Jaber Al Jaber, Badr Bageri, Yazeed Alshehri, Waleed Otain","doi":"10.1002/cjce.25364","DOIUrl":"https://doi.org/10.1002/cjce.25364","url":null,"abstract":"Drilling fluid additives are essential in formulating an optimal mud composition for the desired geological formation. They provide different functions that enable the drilling process to reach a target zone. However, the effectiveness of these additives may be limited under certain conditions. The physical attributes of the weighting material additives such as solid particle size (particle size distribution [PSD]). The PSD can influence multiple drilling fluid properties, including the rheology, filtration, and filter cake properties. This work examined the performance of perlite when incorporated into water-based mud with three different grades of haematite particle sizes. The investigation focused on the rheological properties, filtration, and filter cake characteristics utilizing two distinct filtration mediums: the ceramic disk and core sample. The results indicated that the PSD minimally impacts the filtration and the filter cake properties when the pore distribution of the filtration medium is uniform at low drilling mud density. However, a more pronounced effect was observed when core samples were utilized during the filtration test, reflecting the variation in pore distribution. Remarkably, perlite exhibited exceptional effectiveness in improving the drilling fluid properties. Its influence became particularly evident when core samples were employed as the filtration medium, demonstrating resilience against changes in both filtration medium pore distribution and haematite-varied particle size grades. In this case, maximum improvements of 69%, 84%, and 86% were achieved in filtration volume, filter cake thickness, and filter cake permeability, respectively. Perlite showed an excellent performance at varied conditions represented by filtration medium and weighting material PSD.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"102 12","pages":"4230-4240"},"PeriodicalIF":1.6,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative study of the thermo-catalytic reforming of agricultural and forest residue and advanced characterization of final products in a cold climate 寒冷气候下农业和林业残留物热催化重整的比较研究及最终产品的高级表征

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-14 DOI: 10.1002/cjce.25360

Bijay Dhakal, Vinoj Kurian, Neelanjan Bhattacharjee, Rajender Gupta, Jason Olfert, Larry Kostiuk, Andreas Hornung, Amit Kumar

{"title":"Comparative study of the thermo-catalytic reforming of agricultural and forest residue and advanced characterization of final products in a cold climate","authors":"Bijay Dhakal, Vinoj Kurian, Neelanjan Bhattacharjee, Rajender Gupta, Jason Olfert, Larry Kostiuk, Andreas Hornung, Amit Kumar","doi":"10.1002/cjce.25360","DOIUrl":"10.1002/cjce.25360","url":null,"abstract":"Global agricultural and forest residues hold promise for renewable fuel production through thermo-catalytic reforming (TCR). Limited data exists on TCR outcomes for regions known for cold conditions like Canada. This study used a 2 kg h−1 TCR unit for the intermediate pyrolysis/reforming of agricultural (wheat straw pellet, WSP) and forest (softwood pellet, SWP) residues. Maximum bio-oil yields were 8.43% for wheat straw pellets and 7.99% for softwood pellets at 400 and 500°C reactor and reformer temperatures. Feedstock, bio-oil, and biochar properties were analyzed through proximate and ultimate analysis. At 550°C reactor and 700°C reforming temperatures, 70.73% of the wheat straw pellet-based gas yield contained 36.11 vol.% H2 and 11.08 vol.% CH4, giving a higher heating value (HHV) of 12.54 MJ kg−1. A high concentration of CH4 (22.02 vol.%) in the softwood pellet-based gas gave an HHV of 17.94 MJ kg−1. The low viscosity (3.9 mPa · s−1) and total acid number (7.3 mg KOH g−1) wheat straw pellet-based bio-oil had an O/C molar ratio of 0.09 and an HHV of 35.80 MJ kg−1. The 400/600°C reactor/reformer temperatures gave the lowest area percentage of mono-aromatic (16 vol.%) and polycyclic aromatic (11.20 vol.%) compounds in the softwood pellet bio-oil. The O/C molar ratio (0.5–0.6) in softwood pellet biochar elevated the higher heating value from 32.37 to 34.57 MJ kg−1. The study results guide optimal TCR unit operation in cold climates like Canada with local feedstocks, emphasizing its notable hydrogen production over bio-oil and biochar.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 1","pages":"188-205"},"PeriodicalIF":1.6,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25360","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141341225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemical process fault detection and trend analysis based on KESN 基于 KESN 的化工过程故障检测和趋势分析

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-06-11 DOI: 10.1002/cjce.25350

Yuping Cao, Ruikang Cheng, Xiaogang Deng, Ping Wang

引用次数: 0