Canadian Journal of Chemical Engineering最新文献_第8页

Antibacterial studies of vitamin E encapsulated lemongrass oil nanoemulsions against gram-negative and gram-positive bacteria 维生素E包封柠檬草油纳米乳对革兰氏阴性菌和革兰氏阳性菌的抑菌研究

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-21 DOI: 10.1002/cjce.25610

Veda Prakash, Vaishakh Nair, Lipika Parida

{"title":"Antibacterial studies of vitamin E encapsulated lemongrass oil nanoemulsions against gram-negative and gram-positive bacteria","authors":"Veda Prakash, Vaishakh Nair, Lipika Parida","doi":"10.1002/cjce.25610","DOIUrl":"https://doi.org/10.1002/cjce.25610","url":null,"abstract":"The current study assessed the antibacterial properties of vitamin E nanoemulsions, synthesized using a low-energy phase inversion emulsification method. The nanoemulsions were characterized through particle size analysis, and their antimicrobial efficacy was assessed against the bacteria Staphylococcus aureus and Escherichia coli by disc diffusion method. The mechanisms underlying the antibacterial activity were investigated through scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The vitamin E nanoemulsions demonstrated significant antibacterial activity against both bacterial strains. Specifically, the zone inhibition diameters for S. aureus and E. coli increased by 5.68 times and 2.61 times, respectively, compared to the pure vitamin E component. The incorporation of Tween 80 as a surfactant resulted in a reduction of the antibacterial properties of the nanoemulsions. Furthermore, the study found that the vitamin E encapsulated lemongrass oil nanoemulsion demonstrated higher antibacterial activity to S. aureus and E. coli when compared to other nanoemulsions. The nanoemulsions exhibited significantly greater resistance to S. Aureus as compared to E. coli. SEM and FTIR analyses revealed that the nanoemulsions induced alterations in bacterial cell membrane permeability and surface characteristics. These results confirmed the mechanism of vitamin E nanoemulsions antibacterial activity and established a crucial base for their potential use in food matrices.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 8","pages":"3739-3750"},"PeriodicalIF":1.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551331","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

Study of solids flow in the dipleg of the primary cyclone of a 0.6 m diameter fluidized bed of a large group A powder 大a族粉体直径0.6 m流化床一级旋流器双孔内固体流动研究

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-21 DOI: 10.1002/cjce.25606

Jessica Godin, Francisco Sanchez Careaga, Dominic Pjontek, Cedric Briens, Jennifer McMillan

引用次数: 0

Semi-empirical model of brine evaporation rate in lithium processing 锂加工中卤水蒸发速率的半经验模型

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-21 DOI: 10.1002/cjce.25604

David Aleman-Sanchez, Diego Bertin, Juliana Piña

{"title":"Semi-empirical model of brine evaporation rate in lithium processing","authors":"David Aleman-Sanchez, Diego Bertin, Juliana Piña","doi":"10.1002/cjce.25604","DOIUrl":"https://doi.org/10.1002/cjce.25604","url":null,"abstract":"Lithium is a critical element in the transition to cleaner energy and is produced primarily in the Lithium Triangle (Argentina, Chile, and Bolivia) through the evaporative process. This process involves brine concentration through solar and wind evaporation in large ponds, where the salts are concentrated and eventually reach their solubility product and crystallize. Dynamic brine evaporation is crucial to designing and optimizing evaporation ponds, where predicting the evaporation rate is essential. In this work, the evaporation of simple synthetic brines composed individually of NaCl, KCl, or MgCl2 was experimentally studied in an evaporation chamber that allows monitoring of air temperature, humidity, brine temperature, and air velocity. The results show that brines with the same initial ionic strength but of different nature have similar evaporation rates under the same evaporation conditions. The evaporation rate decreases as the ionic strength increases. During evaporation, the ionic strength and brine density increase due to the concentration of the salts but remain constant when crystallization begins. A semi-empirical model was developed to correlate the evaporation rate of brines with their density, allowing this rate to be estimated with an error of less than 5% using easily measurable data. The model can be applied to natural brines from the lithium industry rich in NaCl, KCl, and MgCl2.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 8","pages":"3704-3712"},"PeriodicalIF":1.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551328","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

Effect of the presence or absence of a gas–liquid interface on the initiation of liquid phase hydrocarbon oxidation 气液界面的存在与否对液相烃类氧化起始的影响

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-19 DOI: 10.1002/cjce.25605

Muhammad N. Siddiquee, Arno de Klerk

{"title":"Effect of the presence or absence of a gas–liquid interface on the initiation of liquid phase hydrocarbon oxidation","authors":"Muhammad N. Siddiquee, Arno de Klerk","doi":"10.1002/cjce.25605","DOIUrl":"https://doi.org/10.1002/cjce.25605","url":null,"abstract":"The kinetic description often overlooks the initiation of liquid-phase hydrocarbon autoxidation because of the induction period. The start of oxidation, or oxidation at a low conversion rate, occurs largely in the bulk liquid, which remains near air-saturated, maintaining a minimal Hatta-number. At low conversion rates, the oxidation rate still depended on the gas–liquid interface area per unit liquid hydrocarbon volume under similar conditions. Mixing under otherwise similar conditions impacted product selectivity to oxygen and radical–radical additions at the same conversion level. These observations indicated that in an equilibrated reaction system, there was not an equal probability for initiation by O2 at the gas–liquid interface and in the bulk liquid. The purpose of the study was to determine if the presence of a gas–liquid interface affected the initiation of hydrocarbon autoxidation. Reactions were performed using air-saturated tetralin and indan at 130 and 140°C in systems with and without gas–liquid interface for 1 and 7 days. It was found that at the same conditions, the initiation rate was faster when a gas–liquid interface was present. It was further found that initial product selectivity to oxygen versus radical addition was lower when a gas–liquid interface was present. These results and those from previous studies can be explained if autoxidation initiates faster at the gas–liquid interface than in the bulk liquid at equilibrated conditions. In conclusion, oxygen at the gas–liquid interface has different initiation kinetics, but it does not affect the liquid-phase hydrocarbon oxidation mechanism.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 8","pages":"3691-3703"},"PeriodicalIF":1.6,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551359","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

Effect of structure parameters on solid particle erosion resistance coupled biomimetic anti-erosion functional surface: A CFD-DPM investigation 结构参数对固体颗粒抗侵蚀耦合仿生抗侵蚀功能表面的影响：CFD-DPM研究

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-19 DOI: 10.1002/cjce.25598

Yunshan Dong, Jialiang Guo, Kun Yang, Xiaodong Si, Hongyu Pan

引用次数: 0

Green and selective supercritical fluid extraction of essential oil and cannabidiol from Cannabis sativa L. 绿色和选择性超临界流体萃取大麻油和大麻二酚。

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-19 DOI: 10.1002/cjce.25612

Lucia Baldino, Mariarosa Scognamiglio, Ernesto Reverchon

引用次数: 0

Pyrolysis kinetics of the carbonization of high-sulphur anthracite for activated carbon production 高硫无烟煤炭化生产活性炭的热解动力学研究

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-16 DOI: 10.1002/cjce.25602

Chen Wang, Guofu Dai, Xuesen Chai, Chao Peng, Jinke Zhao, Weinan Wang, Zhijie Fu, Chenlong Duan

引用次数: 0

New design of two-dimensional LQ control for batch processes with iterative learning error compensation 基于迭代学习误差补偿的批处理二维LQ控制新设计

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-15 DOI: 10.1002/cjce.25603

Chonggao Hu, Jianjun Bai, Hongbo Zou

{"title":"New design of two-dimensional LQ control for batch processes with iterative learning error compensation","authors":"Chonggao Hu, Jianjun Bai, Hongbo Zou","doi":"10.1002/cjce.25603","DOIUrl":"https://doi.org/10.1002/cjce.25603","url":null,"abstract":"This paper proposes a two-dimensional infinite horizon linear quadratic iterative learning control (2D-IHLQILC) strategy based on error compensation. The strategy aims to address the shortcomings of one-dimensional infinite horizon linear quadratic control (1D-IHLQC), which is unable to utilize historical batch information. Firstly, a novel extended state space model is established to describe the batch process, which provides more degrees of freedom for the controller design and enables additional adjustment of the batch process input increment and output increment. Secondly, an error compensation strategy is introduced using historical batch information, which extends the novel extended state-space model from one to two dimensions and can effectively deal with the time delay problem. Finally, a novel 2D-IHLQILC controller is designed, which empowers the controller to learn iteratively from historical batch information to improve the control performance batch by batch and to achieve full tracking of the setpoint trajectory. The effectiveness of the 2D-IHLQILC is tested on the holding pressure control in the injection moulding process as an example.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 8","pages":"3826-3852"},"PeriodicalIF":1.6,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551313","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

Novel techniques in bio-oil production through catalytic pyrolysis of waste biomass: Effective parameters, innovations, and techno-economic analysis 通过催化裂解废弃生物质生产生物油的新技术：有效参数、创新和技术经济分析

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-15 DOI: 10.1002/cjce.25587

Behnam Rezvani

{"title":"Novel techniques in bio-oil production through catalytic pyrolysis of waste biomass: Effective parameters, innovations, and techno-economic analysis","authors":"Behnam Rezvani","doi":"10.1002/cjce.25587","DOIUrl":"https://doi.org/10.1002/cjce.25587","url":null,"abstract":"The increasing demand for sustainable energy sources has driven significant advancements in the field of bio-oil production. This article scrutinizes catalytic pyrolysis for its ability to improve bio-oil characteristics through the use of catalysts and optimization of process conditions. Critical parameters such as reaction temperature, heating rate, biomass feedstock, and catalyst type are analyzed for their influence on bio-oil properties. Innovations in catalyst design, including the development of hierarchical zeolites, metal oxides, and bifunctional catalysts, are explored for their efficacy in deoxygenation, minimizing coke formation, and stabilizing bio-oil. Additionally, advanced techniques like catalytic plasma pyrolysis and co-pyrolysis with diverse feedstocks are investigated to further enhance bio-oil quality. The techno-economic analysis is conducted to assess the feasibility of these novel techniques, considering fixed and variable costs, and the market potential of the produced bio-oil. This analysis aims to provide a holistic perspective on the economic viability and scalability of catalytic pyrolysis for bio-oil production. This research contributes to the very recent advancement of bio-oil production technologies, offering insights into optimizing process parameters and catalyst innovations. The findings facilitate more efficient and economically viable bio-oil production methods, supporting the transition to renewable energy sources.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 8","pages":"3531-3544"},"PeriodicalIF":1.6,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551186","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

Biochar produced from pressed palm fibre to removal β-carotene from crude palm oil 从压榨的棕榈纤维生产生物炭，以去除粗棕榈油中的β-胡萝卜素

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-01-15 DOI: 10.1002/cjce.25595

Bibiane Nardes Segala, Bruna Clarissa Steffens, Cristiano Augusto Ballus, Daniel Assumpção Bertuol, Eduardo Hiromitsu Tanabe

{"title":"Biochar produced from pressed palm fibre to removal β-carotene from crude palm oil","authors":"Bibiane Nardes Segala, Bruna Clarissa Steffens, Cristiano Augusto Ballus, Daniel Assumpção Bertuol, Eduardo Hiromitsu Tanabe","doi":"10.1002/cjce.25595","DOIUrl":"https://doi.org/10.1002/cjce.25595","url":null,"abstract":"Adsorbents produced from the reuse of pressed palm fibres, a residue derived from the palm oil extraction process, are an alternative to commercial adsorbents for the removal of β-carotene from crude palm oil. Two adsorbents produced by the pyrolysis of pressed palm fibres were analyzed, where one was chemically activated with phosphoric acid and the other was not activated. Under the conditions studied, biochar activated with phosphoric acid presented an adsorption capacity of 2.99 mg g−1 and 86% β-carotene removal. The results of kinetic tests indicated that the pseudo-second order (PSO) model revealed the best fit to the experimental data. The isothermal curves suggested the Brunauer–Emmett–Teller (BET) model adjusted better for the isotherms of 30, 40, and 50°C, while the Freundlich model was the one that best described the isotherm of 60°C. Thermodynamic parameters indicated that the adsorption process was spontaneous, favourable, and endothermic. Furthermore, the activated biochar showed a significant reduction in phosphorus content, indicating an alternative to commercial adsorbents (bleaching earths) traditionally used in the crude palm oil refining process, while also aligning with the principles of the circular economy. Analyses were carried out to characterize the adsorbent material and quantify the oil quality parameters.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 8","pages":"3676-3690"},"PeriodicalIF":1.6,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551314","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