Canadian Journal of Chemical Engineering最新文献_第4页

Process optimization and techno-economic evaluation of a nanomembrane–AOP hybrid semi-pilot system for antibiotic abatement 纳米膜- aop混合半中试系统的工艺优化及技术经济评价

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-09-08 Epub Date: 2026-03-30 DOI: 10.1002/cjce.70380

Shrabana Pal, Shaikh Z. Ahammad, Sankha Chakrabortty, Parimal Pal

{"title":"Process optimization and techno-economic evaluation of a nanomembrane–AOP hybrid semi-pilot system for antibiotic abatement","authors":"Shrabana Pal, Shaikh Z. Ahammad, Sankha Chakrabortty, Parimal Pal","doi":"10.1002/cjce.70380","DOIUrl":"https://doi.org/10.1002/cjce.70380","url":null,"abstract":"A continuous hybrid treatment system on integration of cross-flow flat-sheet nanofiltration (NF) membrane system with persulphate-based oxidation was developed for efficient removal and degradation of antibiotic residues from water. The cross-flow configuration significantly reduced fouling through enhanced surface sweeping, enabling stable operation. Antibiotic rejection increased with transmembrane pressure and cross-flow rate, confirming uncoupled solute–solvent transport in NF. Maximum permeate fluxes of 352, 188, and 136 L m−2 h−1 were obtained for NF-2, NF-20, and NF-1 membranes, respectively, at 14 bar and 800 LPH. Overall rejection exceeded 96%–98%, following the order azithromycin > ofloxacin > ciprofloxacin. Azithromycin rejection was dominated by steric hindrance, while ciprofloxacin and ofloxacin were mainly rejected through Donnan and electrostatic exclusion mechanisms. Optimal performance was achieved at pH 9, where all antibiotics existed in anionic form and strong charge repulsion dominated separation. The NF concentrate was subsequently treated using persulphate oxidation, and process parameters were optimized via response surface methodology. Under optimized conditions (persulphate 6.1 mg L−1, flow rate 36 mL min−1, residence time 40 min), degradation efficiencies of 98.88% for azithromycin, 97.96% for ofloxacin, and 97.65% for ciprofloxacin were achieved. The results demonstrate a robust, low-fouling, and scalable tertiary treatment strategy for antibiotic-contaminated water.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"104 10","pages":"5435-5457"},"PeriodicalIF":2.2,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148904402","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

Thermal oxidative and thermal stability of acyclic alkenes at 260–325°C 260-325℃下无环烯烃的热氧化和热稳定性

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-09-08 Epub Date: 2026-02-23 DOI: 10.1002/cjce.70310

Muhammad Nurunnabi Siddiquee, Pranav Girishbhai Patel, Laine Badaro Pereira, Cibele Melo Halmenschalger, Arno de Klerk

{"title":"Thermal oxidative and thermal stability of acyclic alkenes at 260–325°C","authors":"Muhammad Nurunnabi Siddiquee, Pranav Girishbhai Patel, Laine Badaro Pereira, Cibele Melo Halmenschalger, Arno de Klerk","doi":"10.1002/cjce.70310","DOIUrl":"https://doi.org/10.1002/cjce.70310","url":null,"abstract":"Synthetic kerosenes produced from non-petroleum resources can contain percentage level alkenes that may affect thermal oxidative stability, which is an important requirement for jet fuel. The thermal oxidative stability of several alkenes was evaluated at 260–325°C under conditions of limited oxygen availability to approximate conditions in the jet fuel thermal oxidative stability test (JFTOT). Mixtures of 10 wt.% 1-hexene, 1-decene, 1-dodecene, 2,3-dimethyl-2-butene, and 3,3-dimethyl-1-butene, respectively, in 90 wt.% n-decane were converted under thermal (N2 atmosphere) and thermal oxidative (air atmosphere) conditions. Products were characterized using gas chromatography, with density and refractive index used as supporting measures to detect macroscopic changes. Conversion was detected both under thermal and thermal oxidative conditions, with the latter resulting in a wider range of products and higher concentration of products. Evidence was found of two modes of free radical initiation: (i) oxidative affecting both saturated and unsaturated compounds, and (ii) thermal affecting unsaturated compounds. It was further found that within the homologous series of 1-alkenes chain length had little impact on the progression of thermal oxidative conversion. Conversely, for alkenes of the same chain length, skeletal structure and alkene-position had a considerable impact on thermal oxidative conversion; not all alkenes were prone to addition product formation.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"104 10","pages":"5253-5266"},"PeriodicalIF":2.2,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148904377","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

Unravelling stability mechanisms in petroleum coke–sludge slurry: A component-decoupled study on the rheological and structural effects of oily sludge 石油焦炭-污泥浆液的解旋稳定性机制：油泥流变和结构效应的组分解耦研究

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-09-08 Epub Date: 2026-04-12 DOI: 10.1002/cjce.70378

Xing Ma, Xinyu Ren, Zhiguo Shao, Fan Nie, Jiaofei Wang, Yonghui Bai, Xudong Song, Peng Lv, Guangsuo Yu

{"title":"Unravelling stability mechanisms in petroleum coke–sludge slurry: A component-decoupled study on the rheological and structural effects of oily sludge","authors":"Xing Ma, Xinyu Ren, Zhiguo Shao, Fan Nie, Jiaofei Wang, Yonghui Bai, Xudong Song, Peng Lv, Guangsuo Yu","doi":"10.1002/cjce.70378","DOIUrl":"https://doi.org/10.1002/cjce.70378","url":null,"abstract":"The growth of the petroleum and chemical industries has increased the production of petroleum coke (PC) and oily sludge (OS), creating environmental challenges. Co-slurry gasification of PC and OS offers a clean solution for resource utilization and harmless treatment. However, the stability mechanisms of petroleum coke-sludge slurry (PCSS) remain poorly understood, which is key to optimizing slurry preparation and gasification. In this study, oil, solid, and water were separated from OS, and their effects on slurry rheology were analyzed. The results show that adding OS from 1 wt.% to 20 wt.% causes the apparent viscosity to first decrease and then increase by 208 mPa · s, with the lowest viscosity and best stability at 10 wt.% OS in PC. The oil phase improves flowability by lubricating and dispersing particles but increases thixotropic behaviour. The solid phase stabilizes the slurry by forming a skeletal structure and preventing sedimentation, though it increases viscosity due to internal friction. Porous sludge particles create a stabilizing network between PC particles. This study provides theoretical support for the industrial application of OS and PC co-slurry gasification.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"104 10","pages":"5409-5423"},"PeriodicalIF":2.2,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148903816","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

Influence of C8–C10 hydrocarbons on the flash point behaviour of synthetic kerosene for jet fuel blending C8-C10烃对喷气燃料掺合用合成煤油闪点行为的影响

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-09-08 Epub Date: 2026-03-24 DOI: 10.1002/cjce.70373

Joao Felipe Pereira Bassane, Meet H. Shah, Arno de Klerk

{"title":"Influence of C8–C10 hydrocarbons on the flash point behaviour of synthetic kerosene for jet fuel blending","authors":"Joao Felipe Pereira Bassane, Meet H. Shah, Arno de Klerk","doi":"10.1002/cjce.70373","DOIUrl":"https://doi.org/10.1002/cjce.70373","url":null,"abstract":"Safety specifications for jet fuel require a minimum flash point of 38°C. Synthetic kerosenes produced from non-petroleum sources often contain different proportions of n-alkanes, iso-alkanes, cycloalkanes, and aromatics than petroleum-derived jet fuels, raising questions about the applicability of established flash point correlations. In this study, linear, branched, cyclic, and aromatic C8–C10 hydrocarbons were blended at 5 wt.% and 10 wt.% into a model synthetic kerosene (60 wt.% n-dodecane, 20 wt.% isopropylcyclohexane, and 20 wt.% p-cymene). Selected C8–C9 hydrocarbons were also blended into three actual synthetic kerosenes (olefinic from alcohol-to-jet conversion, olefinic from 1-hexene and cyclohexene oligomerization, and paraffinic from wax hydrocracking) and two petroleum-derived kerosenes (hydrotreated kerosene and Jet A-1). Flash points were determined using closed-cup methods, and densities and refractive indices were measured to assess deviations from ideal mixing. The dataset was used to evaluate three empirical flash point correlations (Wickey–Chittenden, Hu–Burns, and Gary–Handwerk). Blending C8 hydrocarbons reduced the flash point of the model synthetic kerosene from 52°C to 32–49°C, whereas C9–C10 hydrocarbons caused moderate to negligible reductions. Density measurements revealed small but statistically significant deviations from ideal behaviour for most blends. Flash point prediction errors were influenced primarily by carbon number rather than hydrocarbon class. Synthetic blends containing olefinic additives showed the largest underprediction. The Wickey–Chittenden and Gary–Handwerk correlations resulted in 0.6%–9.8% (AARD) and negative bias, indicating conservative predictions. In conclusion, established petroleum-based flash point correlations were found to remain suitable for synthetic kerosene systems.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"104 10","pages":"5201-5228"},"PeriodicalIF":2.2,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148904267","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

Effects of NH3 co-firing ratios on performance of a 500 MWe pulverized coal combustor using a compartment model NH3共燃比对500mwe煤粉燃烧室燃烧性能的影响

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-09-08 Epub Date: 2026-03-23 DOI: 10.1002/cjce.70361

Son Ich Ngo, Hai Hung Pham, Bay Van Tran, Thanh Trung Bui, Thanh Tam Thi Nguyen, Hieu Trung Bui, Sivanappan Kumar, Khoi Hoang Nguyen

{"title":"Effects of NH3 co-firing ratios on performance of a 500 MWe pulverized coal combustor using a compartment model","authors":"Son Ich Ngo, Hai Hung Pham, Bay Van Tran, Thanh Trung Bui, Thanh Tam Thi Nguyen, Hieu Trung Bui, Sivanappan Kumar, Khoi Hoang Nguyen","doi":"10.1002/cjce.70361","DOIUrl":"https://doi.org/10.1002/cjce.70361","url":null,"abstract":"This study developed a 1D compartment model with 21 continuous stirred tank reactors to evaluate NH3 co-firing (0%–30%) with bituminous coal (BC) and Ninh Binh anthracite (NB) in a 500 MWe pulverized coal (PC) combustor, advancing low-emission power generation for using Vietnam's coal resources. The model employs 341 reactions, including 117 nitrogen-related, and accurately predicts combustion performance and emissions. Without NH3 co-firing, BC and NB show comparable combustion, with NB's higher fixed carbon (61.8 wt.% vs. 54.7 wt.%) driving faster heat release. At 10% NH3, NOx emissions remain stable (123.6–126.5 ppm vs. 122.3–125.5 ppm at 0%), the pathway favouring N2O conversion to N2. At 30% NH3, NOx increases significantly (639.8 ppm for BC, 565.7 ppm for NB) due to the NH3 ➔ NH2 ➔ HNO ➔ NO pathway, amplified by the BC's higher volatile matter (29.5 wt.% vs. 13.3 wt.%). CO2 emissions decrease by 28.2% for BC and 28.0% for NB, leveraged by NH3's carbon-free nature. However, increased NOx emissions at 30% NH3 indicate trade-offs which require further investigation. This model can be used for evaluating NH3 co-firing ratios in industrial-scale combustors, balancing NOx control and CO2 reduction while elucidating emission formation pathways.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"104 10","pages":"5424-5434"},"PeriodicalIF":2.2,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148904330","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

Issue Highlights 问题突出

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-09-08 DOI: 10.1002/cjce.70265

引用次数: 0

Antisolvent crystallization of lithium hydroxide monohydrate: Significant factors and kinetics analysis 一水氢氧化锂的抗溶剂结晶：影响因素及动力学分析

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-09-08 Epub Date: 2026-04-07 DOI: 10.1002/cjce.70379

Chentao He, Liuyin Xia

{"title":"Antisolvent crystallization of lithium hydroxide monohydrate: Significant factors and kinetics analysis","authors":"Chentao He, Liuyin Xia","doi":"10.1002/cjce.70379","DOIUrl":"https://doi.org/10.1002/cjce.70379","url":null,"abstract":"Crystallization is the final stage in lithium hydroxide monohydrate (LiOH · H2O) production, and antisolvent crystallization offers a lower-energy route compared with evaporative methods. In this study, we investigated bench-scale ethanol-based antisolvent crystallization of LiOH · H2O, and identified the significant impact parameter via a four-factor, three-level Box–Behnken design (29 runs). Effects of agitation rate (100–250 rpm), ethanol concentration (80–100 vol.%), organic-to-aqueous volumetric ratio (O/A ratio) (0.4–0.8), and temperature (20–40°C) on yield were reported. Statistical analysis showed that these factors acted independently rather than through combined interactions. The O/A ratio was the most dominant one: yield increased from ~10% at O/A of 0.4 to ~30% at O/A of 0.8. Ethanol concentration also had a strong effect with yield increasing from 5% at 80 vol.% to 26% at 100 vol.%. X-ray diffraction (XRD) confirmed LiOH · H2O in all products, and scanning electron microscopy (SEM) showed that, unlike the compact blocky crystals formed by evaporative crystallization, ethanol antisolvent crystallization produced elongated plate-like crystals featuring side projections. Crystallization kinetics were studied in a non-seeded LiOH-EtOH-H2O system between 10 and 40°C. The %yield versus time at different temperatures were fitted well to the Avrami equation (R2 = 0.96–0.99) with very low exponents (n = 0.14–0.5). This indicates that the ethanol antisolvent crystallization can be characterized by rapid nucleation followed by diffusion-limited growth. Early-time kinetics analysis using parabolic diffusion law produced a transport rate constant kp that decreased as temperature increasing. It indicates that ethanol antisolvent crystallization of LiOH · H2O is governed primarily by thermodynamics through supersaturation, rather than by simple diffusion.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"104 10","pages":"5383-5396"},"PeriodicalIF":2.2,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.70379","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148903870","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 methods in chemical engineering: Magnetometry 化学工程中的实验方法：磁强计

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-09-08 Epub Date: 2026-06-29 DOI: 10.1002/cjce.70500

Michael Claeys, Dominic De Oliveira, Gregory S. Patience, M. Olga Guerrero-Pérez

{"title":"Experimental methods in chemical engineering: Magnetometry","authors":"Michael Claeys, Dominic De Oliveira, Gregory S. Patience, M. Olga Guerrero-Pérez","doi":"10.1002/cjce.70500","DOIUrl":"https://doi.org/10.1002/cjce.70500","url":null,"abstract":"Magnetometry is a non-invasive technique to characterize the behaviour of magnetic materials of which the most common contain Fe, Co, and Ni. Vibrating sample magnetometers (VSMs) vibrate samples at a fixed frequency in a static, homogeneous magnetic field to induce a voltage in pick up coils according to Faraday's law of induction. This voltage is proportional to the magnetic moment of the sample, allowing magnetization to be studied. Magnetometers monitor active phases and particle size distribution changes of catalysts operando. Despite the huge potential for this technique in chemical engineering, it remains on the edge and is slowly becoming more popular with 80 articles a year indexed by Web of Science Core Collection™. It remains mostly in the realm of physics and method development: cantilever magnetometry, vector magnetometry, torque magentometry, SQUID magnetometry (superconduction quantum devices), atomic magnetometry, and magentoencephalography. The complimentary techniques in chemical engineering are nuclear magentic resonance (NMR), Mössbauer spectroscopy, atomic force microscopy (AFM), and elecron paramagnetic resonance/electron spin resonance (EPR/ESR). The main limitation is that only strong ferro or ferrimagnetic samples can be studied, while the weaker paramagnetic or antiferromagnetic phases are obscured by the background contribution, due to the lack of sensitivity. Magnetometry is a bulk technique that measures only the overall magnetization, and subsequently it is problematic to identify contributions from materials comprising multiple phases. Other limitations are related to the effect of chemisorption on the magnetization, thermal blocking and domain structure that complicates determining the particle size distribution.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"104 10","pages":"5176-5188"},"PeriodicalIF":2.2,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.70500","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148903912","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

Thermal characteristics and microstructural evolution mechanism of coal oxidation under methane atmospheres 甲烷气氛下煤氧化的热特征及微观结构演化机制

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-08-06 Epub Date: 2026-03-04 DOI: 10.1002/cjce.70326

Rongkun Pan, Chenzhuo Song, Jiangkun Chao, Daimin Hu

{"title":"Thermal characteristics and microstructural evolution mechanism of coal oxidation under methane atmospheres","authors":"Rongkun Pan, Chenzhuo Song, Jiangkun Chao, Daimin Hu","doi":"10.1002/cjce.70326","DOIUrl":"https://doi.org/10.1002/cjce.70326","url":null,"abstract":"To investigate the influence of different methane concentrations on the thermal characteristics and microstructural evolution of coal oxidation, a C600 high-precision microcalorimeter combined with Fourier transform infrared spectroscopy (FTIR) was employed to analyze the heat-release behaviour and the variation of key functional groups during coal oxidation under methane–air atmospheres. The main goal of this work is to elucidate the coupled thermal–microstructural response and inhibition mechanism of anthracite oxidation under low methane atmospheres (0%–4%), rather than merely reconfirming the inhibitory effect of methane. With increasing methane concentration, the initial oxidation temperature is delayed from 120.57°C to 126.57°C, while the peak heat flow decreases from 236 to 135 mW and the total heat release drops from 1113.94 to 595.64 J/g, corresponding to a 46% reduction, indicating a pronounced inhibitory effect. FTIR analysis shows that hydroxyl, aliphatic CH and oxygen-containing functional groups are significantly enriched after oxidation in air, whereas their intensities and integrated absorbance areas progressively decrease with increasing methane concentration. The coupled thermal–spectral analysis demonstrates that variations in oxidation exothermic peaks closely correspond to the generation of hydroxyl and oxygen-containing groups, confirming that methane modifies the coal oxidation pathway and heat-release characteristics through combined oxygen-dilution, radical-chain inhibition, and adsorption effects. The primary scientific novelty of this work is the quantitative coupling of microcalorimetry and FTIR to reveal how low-concentration methane simultaneously modifies both thermal behaviour and functional-group evolution of anthracite, and to propose an integrated inhibition mechanism that goes beyond simple oxygen dilution.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"104 9","pages":"4672-4687"},"PeriodicalIF":2.2,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695752","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

Issue Highlights 问题突出

IF 2.2 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2026-08-06 DOI: 10.1002/cjce.70264

引用次数: 0