Canadian Journal of Chemical Engineering最新文献

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Development of a deep neural network and empirical model for predicting local gas holdup profiles in bubble columns 深度神经网络和经验模型的发展预测局部气含率在气泡塔
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-25 DOI: 10.1002/cjce.25556
Sebastián Uribe, Ahmed Alalou, Mario E. Cordero, Muthanna Al-Dahhan
{"title":"Development of a deep neural network and empirical model for predicting local gas holdup profiles in bubble columns","authors":"Sebastián Uribe,&nbsp;Ahmed Alalou,&nbsp;Mario E. Cordero,&nbsp;Muthanna Al-Dahhan","doi":"10.1002/cjce.25556","DOIUrl":"https://doi.org/10.1002/cjce.25556","url":null,"abstract":"<p>Estimating local gas holdup profiles in bubble columns is key for their performance evaluation and optimization, as well as for design and scale-up tasks. Up to the current day, there are important limitations in the accuracy and range of applicability of the available models in literature. Two alternatives for the prediction of such local fields can be found in the application of empirical models and the development of deep neural networks (DNN). The main drawback preventing the application of these techniques in previous years was the availability of a large enough databank of local gas holdup experimental measurements. Advances over the last decades in measurement techniques have resulted enough data reported in literature to gather a significative databank for these models' development. A databank containing 1252 experimental points was gathered and used for the development of a quadratic model and a DNN with the rectified linear unit (ReLU) algorithm as the activation function and the adaptive moment estimation (ADAM) algorithm as the optimizer function. The quadratic model and the DNN allowed a highly accurate prediction of the local gas holdup profiles, exhibiting a MSE of 0.0013 and 0.0010, respectively, and an <span></span><math>\u0000 <msubsup>\u0000 <mi>R</mi>\u0000 <mtext>adjusted</mtext>\u0000 <mn>2</mn>\u0000 </msubsup>\u0000 <mo>=</mo>\u0000 <mn>0.9361</mn></math> and <span></span><math>\u0000 <msubsup>\u0000 <mi>R</mi>\u0000 <mtext>adjusted</mtext>\u0000 <mn>2</mn>\u0000 </msubsup>\u0000 <mo>=</mo>\u0000 <mn>0.9499</mn></math> for the quadratic model and the DNN, respectively. Furthermore, these developed models allowed for the estimation of the single and multi-feature effects of the operation conditions, geometrical characteristics, and physical properties of the fluids, over the local gas holdup profiles. The two developed models exhibited an enhanced predictive quality when compared with other models available in literature.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 6","pages":"2918-2936"},"PeriodicalIF":1.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920001","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
Rose essential oils: Current trends, mapping of extraction techniques, chemical analysis, therapeutic applications, and by-product valorization 玫瑰精油:目前的趋势,提取技术,化学分析,治疗应用,和副产品的价值
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-24 DOI: 10.1002/cjce.25554
Aimin He, Nicky Rahmana Putra
{"title":"Rose essential oils: Current trends, mapping of extraction techniques, chemical analysis, therapeutic applications, and by-product valorization","authors":"Aimin He,&nbsp;Nicky Rahmana Putra","doi":"10.1002/cjce.25554","DOIUrl":"https://doi.org/10.1002/cjce.25554","url":null,"abstract":"<p>This paper provides a comprehensive review of recent advancements in the extraction, chemical analysis, therapeutic applications, and valorization of by-products from rose essential oils, with a focus on emerging trends and technologies. Traditional extraction methods, such as hydrodistillation and steam distillation, are compared with modern techniques, including supercritical CO<sub>2</sub> extraction (SFE), ultrasound-assisted extraction (UAE), and microwave-assisted extraction (MAE). These modern techniques offer improved efficiency, yield, and sustainability, while preserving the chemical integrity of bioactive compounds. Influential extraction parameters, such as temperature, pressure, and extraction time, are analyzed to highlight their impact on yield and chemical composition. Special attention is given to the valorization of rose by-products, which show potential for pharmaceutical, cosmetic, and food industry applications. Studies demonstrate the promising antioxidant, antimicrobial, and anti-cancer activities of rose by-products. The growing demand for sustainable extraction methods and high-quality natural products highlights the importance of optimizing these technologies. This review also discusses future research directions in the field of rose essential oils, focusing on the integration of advanced extraction methods and the development of value-added products.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 7","pages":"3332-3357"},"PeriodicalIF":1.6,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144191191","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
Plastic recycling: Challenges and opportunities 塑料回收:挑战与机遇
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-22 DOI: 10.1002/cjce.25531
Pradeep Sambyal, Parisa Najmi, Devansh Sharma, Ehsan Khoshbakhti, Hadi Hosseini, Abbas S. Milani, Mohammad Arjmand
{"title":"Plastic recycling: Challenges and opportunities","authors":"Pradeep Sambyal,&nbsp;Parisa Najmi,&nbsp;Devansh Sharma,&nbsp;Ehsan Khoshbakhti,&nbsp;Hadi Hosseini,&nbsp;Abbas S. Milani,&nbsp;Mohammad Arjmand","doi":"10.1002/cjce.25531","DOIUrl":"https://doi.org/10.1002/cjce.25531","url":null,"abstract":"<p>This review offers an in-depth exploration of current strategies for recycling plastic waste, focusing on mechanical, chemical, and energy recovery methods. It situates these strategies within the context of modern practices by examining ongoing research methodologies and specific case studies related to various types of plastic waste. The global crisis of plastic waste, along with various pre-treatment methods, is thoroughly discussed. The section on mechanical recycling details the processes applicable to different plastics, highlighting key challenges such as thermo-mechanical issues, the use of fillers to enhance certain properties, and material degradation over time. This discussion includes polymers such as polyethylene terephthalate (PET), low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP), and polystyrene (PS). Chemical recycling is analyzed through advanced techniques like pyrolysis, catalytic pyrolysis, solvolysis, and gasification, presenting the state-of-the-art in this field. Additionally, the review touches upon energy recovery and the challenges associated with it. Conclusively, the study delves into the applications of recycled plastics and outlines future challenges. Overall, this review aims to provide a thorough overview and practical guidance on the recycling of plastic waste, offering essential insights for further development in this area.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 6","pages":"2462-2498"},"PeriodicalIF":1.6,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25531","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919937","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
Solar and UV for photocatalytic degradation of spiramycin using nitrogen-doped TiO2 氮掺杂TiO2光催化降解螺旋霉素的研究
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-22 DOI: 10.1002/cjce.25564
Hema Malik, Ravinder Kumar Wanchoo, Amrit Pal Toor
{"title":"Solar and UV for photocatalytic degradation of spiramycin using nitrogen-doped TiO2","authors":"Hema Malik,&nbsp;Ravinder Kumar Wanchoo,&nbsp;Amrit Pal Toor","doi":"10.1002/cjce.25564","DOIUrl":"https://doi.org/10.1002/cjce.25564","url":null,"abstract":"<p>The extensive use of antibiotics in both veterinary and clinical settings has unintentionally led to their presence in surface waters, raising significant concerns. Macrolides, a class of antibiotics classified as ‘emerging contaminants’, have the potential to infiltrate the environment and negatively impact human health. To address this issue, band gap engineering through surface modification of titanium dioxide (TiO<sub>2</sub>) has shown promising efficacy in mitigating such harmful contaminants. In our study, spiramycin (SPR) was subjected to both UV and solar radiation in the presence of a suitable catalyst in a slurry batch reactor. The synthesized catalysts were characterized using various techniques, including X-ray diffraction (XRD), field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FESEM-EDX), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), and Brunauer–Emmett–Teller (BET) analysis. Optimization of key parameters indicated a maximum degradation of 91.08% degradation for 10 mgL<sup>−1</sup> SPR with 2NTiO<sub>2</sub> within 180 minutes under solar radiation. The reaction kinetics revealed that SPR degradation followed the Langmuir–Hinshelwood (L–H) model. Additionally, the intermediates formed during the degradation process were identified using liquid chromatography–mass spectroscopy (LCMS) and a degradation pathway was proposed. A significant reduction in the toxicity of SPR was observed following the photocatalytic treatment.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 7","pages":"3036-3047"},"PeriodicalIF":1.6,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190748","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 simulation of a three-dimensional passive micromixer with flexible and designable baffle modules 具有柔性和可设计挡板模块的三维无源微混合器的数值模拟
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-21 DOI: 10.1002/cjce.25560
Jixu Zou, Xinkun Chen, Xueye Chen, Yuming Cui
{"title":"Numerical simulation of a three-dimensional passive micromixer with flexible and designable baffle modules","authors":"Jixu Zou,&nbsp;Xinkun Chen,&nbsp;Xueye Chen,&nbsp;Yuming Cui","doi":"10.1002/cjce.25560","DOIUrl":"https://doi.org/10.1002/cjce.25560","url":null,"abstract":"<p>This paper presents a new type of three-dimensional variable-angle electro-osmotic micromixer. By introducing the electric field effect into it, the voltage, baffle structure, and electrode structure in the mixing process are studied. The results show that when the voltage value is close to 1 V and the baffles are alternately placed at an angle of 30°, the micromixer performs best. At low Reynolds numbers (Re), the electric field is closely related to the mixing efficiency, which proves that the alternating placement of microelectrodes can effectively improve the mixing efficiency. This study provides a new method for improving the mixing efficiency of micromixers and has broad application prospects in many fields such as chemical analysis, drug delivery, and biological detection.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 7","pages":"3454-3463"},"PeriodicalIF":1.6,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144191217","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
Mass transfer around a cylinder in a nonlinear extensional flow 非线性拉伸流中圆柱体周围的传质
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-20 DOI: 10.1002/cjce.25553
Moshe Favelukis
{"title":"Mass transfer around a cylinder in a nonlinear extensional flow","authors":"Moshe Favelukis","doi":"10.1002/cjce.25553","DOIUrl":"https://doi.org/10.1002/cjce.25553","url":null,"abstract":"<p>In this theoretical report, we explored the transfer of mass around an infinite cylinder in a nonlinear extensional creeping flow, and at large Peclet numbers. First, we inspected the fluid mechanics problem, which is governed by a single dimensionless parameter: the nonlinear intensity of the flow (<i>E</i>). The fluid motion in the presence of the cylinder suggests interesting features such as closed circulations (<i>E</i> &gt; 2/3) and separating surfaces (<i>E</i> &lt; 0), both phenomena which are absent in the linear case (<i>E</i> = 0). Next, we examined the transfer of mass, where three different regions have been distinguished. In the first one (−2/9 &lt; <i>E</i> &lt; 2/3), which also includes the linear case, the thin concentration boundary layer, at each quarter, covers the entire cylinder surface. In the next one (<i>E</i> &gt; 2/3), the closed circulation, which is in contact with the cylinder surface, reduces the length of the concentration boundary layer. In the last one (<i>E</i> &lt; −2/9), separating surfaces touching the surface of the cylinder and creating, at each quarter, two concentration boundary layers flowing in opposite directions. There is a range (−0.340 &lt; <i>E</i> &lt; 0), where the mass transfer is lower than the linear case, with a minimum at <i>E</i> = −2/9 = −0.222. From this point, and in both directions, as |<i>E</i>| increases, the rate of mass transfer also increases.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 7","pages":"3444-3453"},"PeriodicalIF":1.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144191249","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
Top 15 articles published in the CJCE in 2024 2024年在CJCE发表的前15篇文章
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-20 DOI: 10.1002/cjce.25565
João B. P. Soares
{"title":"Top 15 articles published in the CJCE in 2024","authors":"João B. P. Soares","doi":"10.1002/cjce.25565","DOIUrl":"https://doi.org/10.1002/cjce.25565","url":null,"abstract":"&lt;p&gt;It gives me great pleasure to write the editorial of this virtual issue of the &lt;i&gt;CJCE&lt;/i&gt;, which collects 15 articles published in 2024 with the highest number of full-text views. This is a great opportunity to thank our authors for their outstanding contributions to the CJCE and also to ‘take the pulse’ of our readers and find out what topics they considered more relevant in 2024.&lt;/p&gt;&lt;p&gt;These 15 articles cover many areas of chemical engineering—composites, carbon capture, circular-plastic economy, polymeric materials, experimental methods in chemical engineering, microfluidic devices, risk and safety, oil and gas, and educational aspects related to the future chemical engineering—and showcase the fascinating breadth of our profession.&lt;/p&gt;&lt;p&gt;The first article in this virtual special issue is part of the &lt;i&gt;Conversations in Chemical Engineering&lt;/i&gt; special series. This series is dear to me because it attempts to change the way we write scientific papers in order to make them more accessible to a broader readership, not only to the conventional cadre of specialists. As I wrote not too long ago in an article entitled “Is It Time to Change How We Write Scientific Articles?,” ‘The only correct way to write an article is to express your ideas so clearly that after reading it, your readers would say, “Why didn't I think of this before?”’&lt;sup&gt;[&lt;/sup&gt;&lt;span&gt;&lt;sup&gt;1&lt;/sup&gt;&lt;/span&gt;&lt;sup&gt;]&lt;/sup&gt;&lt;/p&gt;&lt;p&gt;In his contribution to the &lt;i&gt;Conversations in Chemical Engineering&lt;/i&gt; special series, now included in this virtual issue, De France (Queen's University) captures the attention of his readers in the first sentence of his article on cellulose nanocrystal composites by asking them, ‘Just like jumbo shrimp, “liquid crystal” is an oxymoron—how can something be both a delicate, shapeless liquid and a robust, solid crystal?’&lt;sup&gt;[&lt;/sup&gt;&lt;span&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/span&gt;&lt;sup&gt;]&lt;/sup&gt; In his comprehensive and accessible review, the author introduces the basics of liquid crystals and self-assembly, and explains the main approaches used to form cellulose nanocrystals (CNC) based composite films, such as co-assembly, templating, and post-processing. He finishes his paper with his uniquely Canadian perspective on the current status, future prospects, and major challenges associated with the development of CNC-based chiral nematic composite materials.&lt;/p&gt;&lt;p&gt;Carbon capture—echoing our modern anxieties about climate change—has also been in the minds of our readers. In the second article in this virtual issue, Usas and Ricardez-Sandoval (University of Waterloo) review the state of CO&lt;sub&gt;2&lt;/sub&gt; capture in Canada,&lt;sup&gt;[&lt;/sup&gt;&lt;span&gt;&lt;sup&gt;3&lt;/sup&gt;&lt;/span&gt;&lt;sup&gt;]&lt;/sup&gt; addressing the measures our nation is taking to address sustainable decarbonization in the context of carbon capture. The authors also suggest a new optimal framework for carbon capture implementation that accounts for environmental and social considerations.&lt;/p&gt;&lt;p&gt;When we think about sustainability these days, one of the first ","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"488-491"},"PeriodicalIF":1.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25565","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117513","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
Experimental and model-based investigation of the droplet size distribution during the mixing process in a batch-settling cell 间歇式沉淀池混合过程中液滴粒径分布的实验与模型研究
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-19 DOI: 10.1002/cjce.25563
Stepan Sibirtsev, Lukas Thiel, Song Zhai, Yutang Toni Cai, Louis Recke, Andreas Jupke
{"title":"Experimental and model-based investigation of the droplet size distribution during the mixing process in a batch-settling cell","authors":"Stepan Sibirtsev,&nbsp;Lukas Thiel,&nbsp;Song Zhai,&nbsp;Yutang Toni Cai,&nbsp;Louis Recke,&nbsp;Andreas Jupke","doi":"10.1002/cjce.25563","DOIUrl":"https://doi.org/10.1002/cjce.25563","url":null,"abstract":"<p>The design of a liquid–liquid gravity settler relies on the experimental investigation and model-based description of the phase separation process in a batch-settling cell. However, according to the current state of the art, the modelling assumes a monodisperse droplet size distribution (DSD), which can lead to an inaccurate settler design. This study considers the polydispersity of the initial DSD resulting from the mixing process in the settling cell to enhance the model accuracy. DSDs of o/w and w/o dispersions during the mixing process in a settling cell are investigated in this work for 2-methyltetrahydrofuran/water and decane/water material systems at hold-ups of 25–50 vol.% and stirrer speeds of 400–850 min<sup>−1</sup>. Sauter mean diameters (SMD) and DSD shapes are analyzed to identify the influence of the investigated parameters on the SMD and DSD and to model the SMD and DSD. The experimental investigation shows that stirrer speed, hold-up, and interfacial tension significantly affect the DSD, while the viscosity of the continuous phase plays a minor role. The SMD is correlated to the Weber number, viscosity group, and hold-up by a model with a mean absolute percentage error (MAPE) of 3.6%. The DSD is described by a log-normal distribution function with a MAPE of 5%. The SMD and DSD models presented in this work can be used to describe the initial DSD of the phase separation process in a batch-settling cell, considering polydispersity and thus increasing the modelling accuracy of the phase separation process.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 7","pages":"3318-3331"},"PeriodicalIF":1.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25563","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190695","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
Study on mixing performance of perforation static mixers applied to high viscosity polymer mixing 用于高粘度聚合物混合的射孔静态混合器的混合性能研究
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-19 DOI: 10.1002/cjce.25546
Chenyang Wang, Jiankang Wang, Zhijun Li, Zuliang Yang, Lijun Hao, Yiwen Zheng
{"title":"Study on mixing performance of perforation static mixers applied to high viscosity polymer mixing","authors":"Chenyang Wang,&nbsp;Jiankang Wang,&nbsp;Zhijun Li,&nbsp;Zuliang Yang,&nbsp;Lijun Hao,&nbsp;Yiwen Zheng","doi":"10.1002/cjce.25546","DOIUrl":"https://doi.org/10.1002/cjce.25546","url":null,"abstract":"<p>To investigate the effect of perforation structure on the mixing performance, three kinds of perforation arrangement were used to modify Kenics static mixer, which were radial arrangement, axial arrangement, and diagonal arrangement. The corresponding modified static mixers were constructed and named PSM-R, PSM-A, and PSM-D. The flow of polymer melts inside them were simulated using Polyflow software. The effects of perforation arrangement, perforation diameter (<i>d</i>), and perforation spacing distance (<i>δ</i>) on segregation scale (<i>S</i>) and pressure drop (<i>Δp</i>) were analyzed using single-factor experiment. The results showed that the perforation structure was helpful to improve the mixing effect. The impact of <i>d</i> on <i>S</i> and <i>Δp</i> was more significant. While increasing <i>d</i> of PSMs, <i>S</i> firstly decreased and then increased. However, <i>Δp</i> monotonously decreased. The impact of <i>δ</i> on <i>S</i> and <i>Δp</i> was smaller. The model of Reynolds number (Re) versus <i>Δp</i> was obtained by fitting and the effect of Re on <i>Δp</i> was significant. In all PSMs, PSM-A with <i>d</i> of 3 mm and <i>δ</i> of 7 mm has the smallest <i>S</i>, that was reduced by 26.2%, compared to the standard Kenics static mixer.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 6","pages":"2953-2964"},"PeriodicalIF":1.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919489","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
Efficient removal of tebuconazole from wastewater by zinc-modified passion fruit peels: Adsorption behaviour and mechanism 锌改性百香果皮对废水中苯康唑的高效去除:吸附行为及机理
IF 1.6 4区 工程技术
Canadian Journal of Chemical Engineering Pub Date : 2024-11-19 DOI: 10.1002/cjce.25547
Rui Song, Yijue Fei, Zilin Meng, Binbin Liu, Baolong Wang, Cong Li, Haixiang Gao, Runhua Lu, Wenfeng Zhou
{"title":"Efficient removal of tebuconazole from wastewater by zinc-modified passion fruit peels: Adsorption behaviour and mechanism","authors":"Rui Song,&nbsp;Yijue Fei,&nbsp;Zilin Meng,&nbsp;Binbin Liu,&nbsp;Baolong Wang,&nbsp;Cong Li,&nbsp;Haixiang Gao,&nbsp;Runhua Lu,&nbsp;Wenfeng Zhou","doi":"10.1002/cjce.25547","DOIUrl":"https://doi.org/10.1002/cjce.25547","url":null,"abstract":"<p>In this research, an effective adsorbent, ZnCl2-modified biochar (Zn-PFPB), was prepared from unprocessed passion fruit peel (PFP) for the removal of tebuconazole (TE) from wastewater. The synthesized Zn-PFPB was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), N<sub>2</sub> adsorption/desorption curves, and point of zero charge, which suggested that Zn-PFPB had an amorphous structure and high porosity. Optimal TE removal occurred at pH 2 with an adsorbent dosage of 0.5 g L<sup>−1</sup>. The kinetics of the adsorption process followed the pseudo-second-order model while the isotherm model used was the Langmuir model, suggesting monolayer chemisorption. The maximum adsorption capacity reached 201.32 mg g<sup>−1</sup> for TE. The adsorption mechanisms were pore filling, hydrogen bonding, π-π interactions, and surface complexation. Importantly, Zn-PFPB maintained removal efficiency of more than 65% over a broad pH range (2–10), which can be considered as a promising candidate for practical applications. The regeneration rate of Zn-PFPB was determined to be 70% after the third cycle when using 1 mol L<sup>−1</sup> NaOH. The cost analysis showed a fabrication cost of $5.093/kg for Zn-PFPB. Batch mode scale-up design showed that 18 g of Zn-PFPB can remove 95% TE from 50 L of wastewater containing 50 mg L<sup>−1</sup> TE. This work proposes a new, economical, and eco-friendly way of managing agricultural waste in wastewater treatment and soil management.</p>","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 6","pages":"2541-2554"},"PeriodicalIF":1.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919959","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
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