Canadian Journal of Chemical Engineering最新文献_第7页

Effect of wettability on saturation distribution and separation performance in oily wastewater treatment using mixed woven fibre bed coalescers 混合编织纤维床凝聚剂处理含油废水时润湿性对饱和度分布及分离性能的影响

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-25 DOI: 10.1002/cjce.25658

Huiqing Luo, Ruilong Li, Zhishan Bai

引用次数: 0

Modelling of thixotropic behaviour of oil sand tailings during withdrawal 油砂尾矿回采过程触变特性模拟

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-24 DOI: 10.1002/cjce.25638

Konstantin Pougatch, Neville Dubash, Clara Gomez, Barry Bara, Adeola Bello-Hamilton

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Effect of nozzle shape on bubble column reactor with constant flow rate 喷嘴形状对恒流量气泡塔反应器的影响

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-24 DOI: 10.1002/cjce.25624

Sachin Kumar, Raj Kumar Singh, Bahni Ray

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ReaxFF MD investigation of different JP8 surrogates on combustion mechanism and reaction kinetics ReaxFF MD研究了不同JP8替代品的燃烧机理和反应动力学

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-19 DOI: 10.1002/cjce.25647

Yang Liu, Hui Sun, Lu Wang, Qing Yun Gao

{"title":"ReaxFF MD investigation of different JP8 surrogates on combustion mechanism and reaction kinetics","authors":"Yang Liu, Hui Sun, Lu Wang, Qing Yun Gao","doi":"10.1002/cjce.25647","DOIUrl":"https://doi.org/10.1002/cjce.25647","url":null,"abstract":"This work aims to investigate the combustion characteristics difference between JP8-1 and JP8-2, and to reveal the combustion mechanism of JP8 surrogate fuels by reactive molecular dynamic simulations (ReaxFF). The JP8-1 fuel shows higher reaction activity, and the JP8-2 surrogate conversion is faster than that of the JP8-1 model. The maximal mass fraction difference for two surrogate fuels consumption can be up to 12% in the pyrolysis process. The differences of reaction pathways, oxygen-containing intermediates, and key products between two surrogate fuels have been analyzed using the VARxMD software. The evolution trends of the vital products and key intermediates of the two fuels are similar owing to the similar fuel structures of linear paraffin components. The branched component isooctane in JP8-1 model can enhance the formation of cyclic chain hydrocarbons products, while branched paraffin component decalin in JP8-2 model promote the formation of structurally stable cycloalkanes. Compared to JP8-2 fuel, the formation of CH2O and coke precursors, the JP8-1 fuel generate more harmful substances. This work can provide an important theoretical basis for the rational design and screening of high-performance surrogate components and additives for complex multi-component jet fuels. And also suggests that the ReaxFF simulation method have the potential as an effective approach for evaluating combustion behaviour in fuel combustion.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 9","pages":"4287-4300"},"PeriodicalIF":1.9,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767934","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

Application of immobilized Burkholderia cepacia lipase on clay in the production of ethyl esters 固定化洋葱伯克氏菌脂肪酶在粘土上生产乙酯的应用

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-18 DOI: 10.1002/cjce.25648

Deise Molinari, Edson Antonio da Silva, Ana Caroline Raimundini Aranha, Sirlei Marques Paschoal, Emerson Barrios Mogollón, Lucas Silva Figueiredo, Pedro Augusto Arroyo, Gisella Maria Zanin

{"title":"Application of immobilized Burkholderia cepacia lipase on clay in the production of ethyl esters","authors":"Deise Molinari, Edson Antonio da Silva, Ana Caroline Raimundini Aranha, Sirlei Marques Paschoal, Emerson Barrios Mogollón, Lucas Silva Figueiredo, Pedro Augusto Arroyo, Gisella Maria Zanin","doi":"10.1002/cjce.25648","DOIUrl":"https://doi.org/10.1002/cjce.25648","url":null,"abstract":"The present work aimed to use commercial Spectrogel clay (type C) as a support for immobilizing Burkholderia cepacia lipase to produce ethyl esters. The highest yield in ethyl ester production was obtained under the following conditions: 1% water (kg kg−1 oil), oil-to-ethanol molar ratio of 1:3, and 15% immobilized biocatalyst (kg kg−1 oil). A kinetic assay was conducted under the optimal conditions obtained to validate the experiment, which already showed a high yield within 6 h (78.82 ± 2.28% for LBC-ADS and 89.42 ± 2.65% for LBC-CB) and reaction equilibrium in 18 h (84.76 ± 0.36% for LBC-ADS and 98.05 ± 1.24% for LBC-CB). Heterogeneity tests were conducted at 1 and 12 h of reaction to analyze the interaction between the support and the enzyme, showing that after the removal of the biocatalysts after 1 h of reaction, there was no significant release of enzymes into the reaction medium.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 9","pages":"4094-4105"},"PeriodicalIF":1.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767930","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

An insight derived from CFD investigation on the regulation of vortex flow in jet impact negative pressure reactors: VG baffle structure 射流冲击负压反应器涡流调节的CFD研究：VG折流板结构

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-18 DOI: 10.1002/cjce.25649

Xinjie Chai, Lingxing Hu, Guangzhou Yang, Yingying Dong, Hao Zhang, Facheng Qiu

{"title":"An insight derived from CFD investigation on the regulation of vortex flow in jet impact negative pressure reactors: VG baffle structure","authors":"Xinjie Chai, Lingxing Hu, Guangzhou Yang, Yingying Dong, Hao Zhang, Facheng Qiu","doi":"10.1002/cjce.25649","DOIUrl":"https://doi.org/10.1002/cjce.25649","url":null,"abstract":"The jet impact negative pressure reactor (JI-NPR) is capable of achieving high efficiency and energy savings through continuous ammonia removal. A large number of multi-scale vortex structures appear during the evolution of porous jet impingement under negative pressure conditions. The mixed model of mixture and the turbulence model of rsealizable k-ε were used to simulate the flow field and vortex in the reactor. Firstly, the most suitable method to describe the multi-scale vortex structure is determined. Next, the vortex core and other flow structures were modulated by configuring the spoiler elements. Specifically, the influence of parameters, including the quantity of spoiler elements (baffles), radial distances, and wing widths, on the turbulent flow field were investigated. Finally, the response surface method was used to construct the regression model equations for pressure drop and homogeneity. It is demonstrated that the Ω-criterion offers a more accurate identification of the flow field inside the JI-NPR. The baffle structure is conducive to reducing energy dissipation, destabilizing the flow field structure, and improving the interphase flow transfer efficiency. The relevant regression equations and optimal structural parameters are also determined. The present study can provide the foundation for the optimization of the geometry design of the JI-NPR.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 9","pages":"4590-4607"},"PeriodicalIF":1.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767929","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

Conversion-time relations for fluid–solid reactors with shrinking-core kinetics 具有收缩堆动力学的流固反应器的转换-时间关系

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-18 DOI: 10.1002/cjce.25644

Enrique Eduardo Tarifa, Juan Rafael García, Carlos Román Vera

{"title":"Conversion-time relations for fluid–solid reactors with shrinking-core kinetics","authors":"Enrique Eduardo Tarifa, Juan Rafael García, Carlos Román Vera","doi":"10.1002/cjce.25644","DOIUrl":"https://doi.org/10.1002/cjce.25644","url":null,"abstract":"The problem of finding expressions linking conversion and residence time for systems of fluid–solid reactions with shrinking-core kinetics is revisited. The classical formulae are revised for the three classical cases with different rate-limiting resistances: mass transfer in the film, chemical reaction and diffusion through the ash layer. It is demonstrated that, for a single particle size, the classical Taylor's expansions of the conversion as a function of the dimensionless residence time can be conveniently replaced by other mathematical functions to solve the problem of inaccuracy and multiple roots of the polynomials. The proposed correlations give accurate solutions. Pairwise correlations permit getting the conversion from the residence time, and the residence time from a given conversion, with no multiple roots, for the cases of a continuous reactor with plug flow or perfectly mixed flow, for the three cases of rate-limiting resistances. The obtained results demonstrate that classical Taylor expansions yield significant errors for small residence times, whereas the newly proposed correlations avoid this issue and provide greater accuracy across the whole range. From the point of view of numerical calculus, the new correlations are simpler and reduce computational effort by eliminating the need to calculate numerous polynomial terms.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 9","pages":"4413-4425"},"PeriodicalIF":1.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767928","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

Experimental investigation of spreading dynamics of glycerol droplets on a heated surface 甘油液滴在受热表面扩散动力学的实验研究

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-18 DOI: 10.1002/cjce.25652

Merve Durubal, Martijn Munck, Kay Buist, J. A. M. (Hans) Kuipers, Maike Baltussen

{"title":"Experimental investigation of spreading dynamics of glycerol droplets on a heated surface","authors":"Merve Durubal, Martijn Munck, Kay Buist, J. A. M. (Hans) Kuipers, Maike Baltussen","doi":"10.1002/cjce.25652","DOIUrl":"https://doi.org/10.1002/cjce.25652","url":null,"abstract":"The dynamics of droplets impacting on solid surfaces are widely encountered in industrial applications. This paper presents an experimental study of the spreading dynamics of droplets of liquids with a temperature-dependent viscosity on a heated horizontal sapphire surface. This surface can be heated between 40 and 90°C and allows for usual observation from different directions. The used liquids are glycerol water solutions with a volume percentage of 80%, 85.2%, and 92.8% glycerol, which feature a large dependency of the viscosity on the temperature. Using high-speed imaging and infrared thermography, the shape of the droplet and the temperature of the droplet surface in contact with the surface are measured, respectively. Our experiments reveal that the spreading of the droplets increases with an increase in the surface temperature, which is also expected as the effective viscosity of the liquid will decrease with an increase in the droplet temperature. However, the heating of the droplets ensures that these effects only are apparent after sufficient time to heat the droplet. In addition, the amplitude of the oscillations in the spreading of the surface will increase when the temperature of the surface is increased, which is also related to the decreased viscosity. Finally, the effects on the local spreading cannot be directly correlated to the temperature of the droplet in contact with the surface, which indicates that the viscosity in the droplet is not homogeneous during the experiment and local gradients in the viscosity are important in the overall spreading behaviour of the droplet.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 8","pages":"3971-3982"},"PeriodicalIF":1.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25652","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551342","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

Titania: From a waste solid catalyst to an inorganic pigment 二氧化钛：从废固体催化剂转化为无机颜料

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-18 DOI: 10.1002/cjce.25642

Nhuan N. Doan, Khanh T. Nguyen, Giang P. T. Nguyen, Linh T. T. Nguyen

{"title":"Titania: From a waste solid catalyst to an inorganic pigment","authors":"Nhuan N. Doan, Khanh T. Nguyen, Giang P. T. Nguyen, Linh T. T. Nguyen","doi":"10.1002/cjce.25642","DOIUrl":"https://doi.org/10.1002/cjce.25642","url":null,"abstract":"The aim of the present study is to recover a waste titania catalyst from α-pinene isomerization, recycle it and use it in the production of inorganic pigments. The acid-contaminated titania (ACT), prepared from ilmenite ore by sulphation, has the potential to function as a solid acid catalyst due to the presence of both Brønsted and Lewis acid sites, with a specific surface area of 163 m2 g−1. The catalytic efficiency was evaluated in the isomerization of turpentine (83.8 wt.% α-pinene) at a reaction temperature of 120°C, using a turpentine:catalyst mass ratio of 4:1. The α-pinene conversion was 99.6% with a camphene selectivity of 43 wt.%. The waste catalyst was recovered and subjected to calcination at a suitable temperature to remove all organic compounds and make it suitable for use in the production of inorganic pigments. The calcined product exhibits pigment properties including a pure rutile phase, an average grain size of 0.2 μm, a specific surface area of 29 m2 g−1 and a reflectance in visible light of 95%. This study has provided a practical, simple, and cost-effective solution for the treatment of residual acid on titania obtained from the hydration of titanyl sulphate, while also demonstrating the simultaneous application of titania in catalysis and pigment production.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 9","pages":"4250-4259"},"PeriodicalIF":1.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767931","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

Data-driven deep learning prediction of full molecular weight distribution in polymerization processes 聚合过程中全分子量分布的数据驱动深度学习预测

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-02-18 DOI: 10.1002/cjce.25635

Dante Mora-Mariano, Antonio Flores-Tlacuahuac, Iván Zapata-González, Enrique Saldívar-Guerra

引用次数: 0