Canadian Journal of Chemical Engineering最新文献_第9页

A holistic approach for assessing occupational health risk due to fugitive emissions in petrochemical processes: Inherent health hazard level index (IHHLI) 评估石油化工工艺中无组织排放造成的职业健康风险的综合方法：固有健康危害水平指数（IHHLI）

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-25 DOI: 10.1002/cjce.25404

Yousef A. Alhamdani, Mimi H. Hassim, Salim M. Shaik

{"title":"A holistic approach for assessing occupational health risk due to fugitive emissions in petrochemical processes: Inherent health hazard level index (IHHLI)","authors":"Yousef A. Alhamdani, Mimi H. Hassim, Salim M. Shaik","doi":"10.1002/cjce.25404","DOIUrl":"10.1002/cjce.25404","url":null,"abstract":"Fugitive emissions from petrochemical facilities have become a major concern due to their impact on plant productivity, the environment, and health. In regard to health, petrochemical workers are at higher occupational health (OH) risk due to their continuous exposure to these harmful emissions. Inherent OH and safety indexes are the most common methods used for assessing OH risk due to fugitive emissions. These methods usually focus on the sources of health hazards, such as chemical substances, process conditions, and process equipment. Therefore, these methods are considered good for measuring the severity of the OH risk. However, based on the source, pathway, receptor (SPR) model, the OH risk due to fugitive emissions is also dependent on the pathway and receptor, where leak and exposure hazards may take place, respectively. For a holistic OH risk assessment, these hazards need to be considered. This was achieved by developing an OH risk assessment methodology that provides an effective assessment that takes into consideration hazards at the source, pathway, and receptor. This paper focuses on the source part of the SPR model, while the pathway and receptor parts will be covered in future publications. This paper presents an index-based method named the inherent health hazard level index (IHHLI) developed for evaluating the severity of the fugitive emission-induced OH risk. The IHHLI is developed by an expert-based selection of the most common and relevant health hazard indicators published in the literature. Based on industry testing, the IHHLI can provide a reliable OH hazard evaluation.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"102 11","pages":"3676-3691"},"PeriodicalIF":1.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777190","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

A mini-review of intensified synthesis of 1st and 2nd generation biofuels in the presence of perovskite catalysts 在过氧化物催化剂作用下强化合成第一代和第二代生物燃料的小型综述

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-25 DOI: 10.1002/cjce.25424

Aryasomayajula Venkata Satya Lakshmi Sai Bharadwaj, Jason Joseph Phillips, Janani Venkateshbabu, Gajendra Kammathanahalli Shivappa, Archana Venkatesh, Navneet Kumar Gupta

{"title":"A mini-review of intensified synthesis of 1st and 2nd generation biofuels in the presence of perovskite catalysts","authors":"Aryasomayajula Venkata Satya Lakshmi Sai Bharadwaj, Jason Joseph Phillips, Janani Venkateshbabu, Gajendra Kammathanahalli Shivappa, Archana Venkatesh, Navneet Kumar Gupta","doi":"10.1002/cjce.25424","DOIUrl":"10.1002/cjce.25424","url":null,"abstract":"Enhancement of a sustainable environment through the choice of a selective catalyst with high activity, regeneration nature, and high stability is an important aspect to be focused on to achieve a high yield and maximum conversion of feedstock to biodiesel (1st generation biofuel), and also in the biomass valorization/pyrolysis (2nd generation biofuel synthesis). Depending on the nature of the catalyst and synthesis method adopted for biofuel production and biomass valorization, the variations in the process conditions, final yield, and conversion are varied accordingly. A prospective development and application of perovskite catalysts in the synthesis of 1st and 2nd generation biofuels using various process intensification strategies for the development of a clean and green environment is reviewed in this study. The synthesis of types of perovskite catalysts polycrystalline, nano-sized, and powdered oxide are also discussed in this review. It is also concluded that, apart from other process parameters, molar ratio is one of the most influencing sensitive factors in the case of 1st generation biofuel synthesis, whereas during the production of 2nd generation biofuels, catalyst concentration and liquid–solid ratio are more significant process parameters that change based on the nature of the catalyst selected for the reaction.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"571-580"},"PeriodicalIF":1.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777189","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

Polymeric flocculation of oil sands tailings: Unveiling rheological indicators and dynamics of bitumen release 油砂尾矿的聚合物絮凝：揭示流变指标和沥青释放动态

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-25 DOI: 10.1002/cjce.25408

Mohammadhasan Sasar, Cliff T. Johnston, Marika Santagata

{"title":"Polymeric flocculation of oil sands tailings: Unveiling rheological indicators and dynamics of bitumen release","authors":"Mohammadhasan Sasar, Cliff T. Johnston, Marika Santagata","doi":"10.1002/cjce.25408","DOIUrl":"10.1002/cjce.25408","url":null,"abstract":"Polymeric flocculation is widely used to accelerate the dewatering and consolidation of oil sands fluid fine tailings (FFTs). Optimizing flocculation requires a fundamental understanding of the changes to the internal structure of the material with polymer addition. Key challenges include sensitivity of flocculation to polymer dose, mixing conditions, and composition of individual FFTs. Moreover, despite the environmental implications, little is known of the effects of flocculation on the mobility of the residual organics present in the tailings. In this paper, advanced rheological tests are used to probe the formation and development of the polymer–clay structure during flocculation in near-real time. This is achieved through a novel setup for controlled delivery of the polymer directly into the measuring cell of a rheometer. This enables continuous monitoring of the rheological parameters during the flocculation process and yields consistent and reproducible samples. An optical monitoring system is used to relate rheological measurements to water release and to changes in the surface accumulation of the residual bitumen. The water-release polymer dose is found to be associated with a distinct rheological response highlighting the potential use of rheometry for polymer dosing/mixing optimization in real time and on a continuous basis in thickeners and inline flocculation systems.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"771-785"},"PeriodicalIF":1.6,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25408","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777193","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

Leaching phosphorous from the lime mud of kraft pulp mills: Towards sustainability 从牛皮纸浆厂的石灰泥中沥滤磷：实现可持续性

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-23 DOI: 10.1002/cjce.25421

Maryam Sadegh Mousavi, Nikolai DeMartini

引用次数: 0

Evaluating the thermal stability of chemicals and systems: A review 评估化学品和系统的热稳定性：综述

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-22 DOI: 10.1002/cjce.25422

Giuseppe Andriani, Gianmaria Pio, Ernesto Salzano, Chiara Vianello, Paolo Mocellin

{"title":"Evaluating the thermal stability of chemicals and systems: A review","authors":"Giuseppe Andriani, Gianmaria Pio, Ernesto Salzano, Chiara Vianello, Paolo Mocellin","doi":"10.1002/cjce.25422","DOIUrl":"10.1002/cjce.25422","url":null,"abstract":"In the realm of chemical processing, particularly at the industrial scale, safety is of utmost importance. A predominant factor causing accidents within the chemical industry is runaway phenomena, primarily initiated by uncontrolled exothermic reactions. This review critically examines the often-overlooked decomposition mechanisms as a significant contributor to thermal energy release, necessitating a comprehensive revision and understanding of both experimental and theoretical strategies for assessing thermal degradation. Key to this discourse is the explication of calorimetry as the principal experimental technique, alongside ab initio quantum chemistry simulations as a robust theoretical framework for quantifying the most relevant properties. However, more than mere cognisance of these methodologies is required for a meticulous thermal stability assessment. The review emphasizes identifying and quantifying fundamental parameters through experimental and theoretical investigations. Only upon acquiring these parameters, including kinetic, thermodynamic, onset, and peak characteristics of the exothermic decomposition reactions, can one effectively mitigate risks and hazards in designing and optimizing chemical processes and apparatus. Furthermore, this review delineates qualitative and quantitative methodologies for hazard assessment, proffering strategies for estimating safe operational conditions and sizing relief devices. The paper culminates in exploring future trajectories in thermal stability assessments, focusing on emerging applications in lithium-ion batteries, electrolyzers, electrified reactors, ionic liquids, artificial intelligence and machine learning approaches. Thus, the paper underlines the evolving landscape of thermal risk management in contemporary and future chemical industries.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 1","pages":"42-62"},"PeriodicalIF":1.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25422","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777267","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

Parameter optimization of the simulated moving bed system based on the IMOSCSO algorithm 基于 IMOSCSO 算法的模拟移动床系统参数优化

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-22 DOI: 10.1002/cjce.25417

Yuhuan Chen, Ling Li

{"title":"Parameter optimization of the simulated moving bed system based on the IMOSCSO algorithm","authors":"Yuhuan Chen, Ling Li","doi":"10.1002/cjce.25417","DOIUrl":"10.1002/cjce.25417","url":null,"abstract":"The optimization of operating parameters for the simulated moving bed (SMB) is complex. A parameter optimization method for the SMB system was proposed based on the improved multi-objective sand cat swarm optimization (IMOSCSO) algorithm. The multi-objective sand cat swarm optimization (MOSCSO) algorithm integrated the update and selection mechanism of the repository in the multi-objective algorithm. Three strategies were proposed to improve the traditional MOSCSO algorithm for increased population diversity, global search capability, and convergence speed. First, the cubic chaotic map was used to initialize the population, which improved the uniformity of the population distribution. Second, including a variable spiral search strategy in the prey search phase enabled the sand cat swarm to explore more search paths to adjust its position. Third, the convergence speed was enhanced by incorporating the alert mechanism of the sparrow search algorithm. The improved algorithm was tested with standard test functions. The IMOSCSO algorithm outperformed other algorithms in terms of convergence and accuracy. Finally, the IMOSCSO algorithm optimized the system parameters of the SMB, demonstrating its practical applications.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"812-833"},"PeriodicalIF":1.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785687","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

Modelling a chemical plant using grey-box models employing the support vector regression and artificial neural network 利用支持向量回归和人工神经网络的灰盒模型为化工厂建模

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-22 DOI: 10.1002/cjce.25416

Mahmood Ghasemi, Hooshang Jazayeri-Rad, Reza Mosayebi Behbahani

引用次数: 0

Crude oil removal from water: Influence of organic phase composition and mineral content 从水中去除原油：有机相组成和矿物含量的影响

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-22 DOI: 10.1002/cjce.25412

Ignacio Rintoul, Thomas Uldry, David Hunkeler

{"title":"Crude oil removal from water: Influence of organic phase composition and mineral content","authors":"Ignacio Rintoul, Thomas Uldry, David Hunkeler","doi":"10.1002/cjce.25412","DOIUrl":"10.1002/cjce.25412","url":null,"abstract":"The effect of organic and inorganic compounds, commonly present in the mineralogy of crude oil and/or added in the washing processes of extracted crude, on the removal efficiency of emulsified oils present in waste washing waters was investigated by means of flocculation. Approximately 90% of the emulsified oil could be removed using an anionic flocculant, providing a residual turbidity below 100 NTU. The yield depended on the nature of the organic and inorganic components present. The higher the chain length of the main organic component, the greater the flocculant concentration required to remove the oil. Several components had an effect of emulsification (e.g., octane, decane), some of which rendered de-oiling process completely ineffective (e.g., naphthenic acids). Aliphatics were the most difficult to eliminate, requiring flocculant levels in the 200–300 ppm range. This is in contrast to 75–100 ppm levels which were required to remove bi- and poly-cyclic aromatics. Heavy oils were more difficult to remove than light oils. There was a strong effect of the pH of the aqueous phase. The optimum was pH = 2.0. Virtually all inorganic compounds reduced the efficiency of removing oil from water when spiked at 1%. The only exception was sodium carbonate which acted as a de-emulsifier. Monovalent salts have a minor effect on de-oiling, with efficiencies remaining at 80%. Divalent chlorides reduced the de-oiling efficiency to 70% while sulphates had a more severe influence. The de-oiling efficiency was lowered substantially with the addition of clays, zinc, cadmium, ferric oxide, calcium carbonate, and dibenyhlthiophene.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"552-570"},"PeriodicalIF":1.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777268","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 superimposing oscillatory flow in a milli-channel with static internals—A numerical study 带静态内部结构的微通道中叠加振荡流的影响--数值研究

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-22 DOI: 10.1002/cjce.25415

Navya Manthani, Vijaya Lakshmi Nanavath, Sreepriya Vedantam

{"title":"Effect of superimposing oscillatory flow in a milli-channel with static internals—A numerical study","authors":"Navya Manthani, Vijaya Lakshmi Nanavath, Sreepriya Vedantam","doi":"10.1002/cjce.25415","DOIUrl":"10.1002/cjce.25415","url":null,"abstract":"Superimposition of oscillatory flow over the axial flow is expected to further enhance the mixing phenomenon based on the limited reported literature. A detailed study on the physics of such superimposed flows will be useful to widen the scope of application of static mixers with superimposed oscillatory flow in continuous modes of operation for several purposes. The flow behaviour of a water–vinyl acetate system in a milli-channel with static internals is studied under the laminar flow regime using computational fluid dynamics (CFD) as a tool. A CFD model is developed and validated with reported literature on a Kenics static mixer. The effect of oscillatory flow superimposed over the axial flow in a milli-channel is studied for Ren = 5 and Reo = 20–65. Residence time distribution (RTD) studies have been carried out and compared numerically for two different geometries, (1) tube without an internal and (2) tube with internals, for two different velocities, (1) net axial velocity and (2) superimposed oscillatory velocity. Results of these RTD studies indicate a sharp distribution in the channel with static internals having superimposed oscillatory flow followed by the channel with static internals with net axial velocity and then a tube without an internal. It is also found that Péclet number (Pe) for static internals with oscillatory flow > net axial flow > tube without an internal (736 > 641 > 315). Further, velocity magnitude, pressure, and Q-criterion are discussed in detail to understand fluid flow behaviour in the milli-channel. From this research, it is understood that superimposing oscillatory flow along with static internals resulted in enhanced mixing when compared with a tube with no internal.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 2","pages":"927-940"},"PeriodicalIF":1.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777195","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

Generation of biosurfactants by P. aeruginosa gi |KP163922| on waste engine oil in a free and immobilized cells system 铜绿假单胞菌 gi |KP163922| 在游离和固定细胞系统中对废机油产生的生物表面活性剂

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2024-07-22 DOI: 10.1002/cjce.25419

Mohan Jujaru, Kajol Pradhan, Shailee Gaur, Amit Jain, Sushil Kumar

{"title":"Generation of biosurfactants by P. aeruginosa gi |KP163922| on waste engine oil in a free and immobilized cells system","authors":"Mohan Jujaru, Kajol Pradhan, Shailee Gaur, Amit Jain, Sushil Kumar","doi":"10.1002/cjce.25419","DOIUrl":"10.1002/cjce.25419","url":null,"abstract":"This study investigated biosurfactant production by the bacterial strain of P. aeruginosa gi |KP 163922| for a free and immobilized cells system using waste engine oil (WEO) as a substrate. The polyurethane foam (PUF) cubes (1 cm × 1 cm × 1 cm) were used as carriers for the immobilization. The batch experiments were performed in Erlenmeyer flasks and monitored at every 24-h interval for both cell systems. The microbial population was counted using the plate count method, and the hydrocarbon degradation percentage was calculated to evaluate the bacterial activity. Surface tension was measured at regular intervals to ensure the presence of biosurfactants. The maximum reduction was 37 and 35 mN/m in a free and immobilized cells system. Immobilization of cells using PUF was found to be efficient in supporting bacterial growth, and after 48 h of incubation, the growth was 2.5 (±0.58) × 1011 CFU/mL. The chemical characterization using Fourier transform infrared (FTIR) spectroscopy confirmed the obtained product as rhamnolipid. Crude biosurfactant yield was found to be maximum in the case of the immobilized system, which was approximately 18 g/L. Scanning electron micrographs (SEM) of the used PUF cubes showed the strong adherence of biofilm to the cube surface and the potential of its reuse in multiple cycles. Gas chromatography–mass spectrometry (GC–MS) analysis confirms that the immobilized strain of P. aeruginosa exhibited superior biodegradation capabilities compared to free cells. Specifically, it was capable of reducing the concentration of polyaromatic hydrocarbons and converting more significant aliphatic compounds into metabolic byproducts such as alkanes, alkenes, cycloalkanes, and carbonyl groups.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"102 11","pages":"3776-3786"},"PeriodicalIF":1.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25419","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785685","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