Canadian Journal of Chemical Engineering最新文献_第5页

Ga-doped CeO2 solid solutions as promoters for Cu-based catalysts: Enhancing CO2 hydrogenation to methanol via optimized metal–support interaction ga掺杂CeO2固溶体作为cu基催化剂的促进剂：通过优化金属-载体相互作用增强CO2加氢制甲醇

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-23 DOI: 10.1002/cjce.25721

Tuo Guo, Wenwen Liu, Panpan Yang, Qingjie Guo, Pei Sean Goh

{"title":"Ga-doped CeO2 solid solutions as promoters for Cu-based catalysts: Enhancing CO2 hydrogenation to methanol via optimized metal–support interaction","authors":"Tuo Guo, Wenwen Liu, Panpan Yang, Qingjie Guo, Pei Sean Goh","doi":"10.1002/cjce.25721","DOIUrl":"https://doi.org/10.1002/cjce.25721","url":null,"abstract":"The low methanol selectivity of Cu/CeO₂ in CO₂ hydrogenation stems from weak metal–support interaction (MSI) and dominant reverse water gas shift (RWGS) pathways. Ga-doped CeO₂ solid solutions are proposed to enhance MSI and oxygen vacancies, addressing insufficient CO₂ activation and H₂ dissociation in conventional Cu-based catalysts. CuO-CeGaₓOₓ (y = 0–0.3) catalysts were synthesized via co-precipitation. Structural and catalytic properties were analyzed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), temperature-programmed H2 reduction (H₂-TPR), temperature-programmed desorption of adsorbed CO2 (CO₂-TPD), and transmission electron microscopy (TEM). Ga doping (y = 0.2) optimized CeGaOₓ solid solution formation, achieving the highest specific surface area (142 m2/g), and Cu0 content (73.4%). At 260°C, CuO-CeGa₀.₂Oₓ showed 12.6% XCO₂, 57% SCH₃OH, and STY = 308.8 gMeOH Kgcat−1 h−1. Enhanced oxygen vacancies and moderate basic sites suppressed RWGS, favouring methanol pathways. Stability tests confirmed 180 h performance retention without structural degradation. Ga doping strengthens MSI via CeGaOₓ solid solutions, promoting oxygen vacancies and Cu0 dispersion. This dual optimization enhances CO₂ adsorption, H₂ dissociation, and methanol selectivity while suppressing CO byproducts. The CuO-CeGa₀.₂Oₓ catalyst demonstrates industrial potential, offering a design strategy for high-performance CO₂ hydrogenation catalysts.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 11","pages":"5398-5409"},"PeriodicalIF":1.9,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284795","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

Biorecycling of polylactide: From enzymatic depolymerization to biotransformation of released products 聚乳酸的生物回收：从酶解聚合到释放产物的生物转化

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-23 DOI: 10.1002/cjce.25717

Alaric Catard, Isabelle Chevalot, Sandrine Hoppe

引用次数: 0

Parametric investigation of drying processes for graphene nanomaterials: Heat and mass transfer analysis 石墨烯纳米材料干燥过程的参数化研究：传热传质分析

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-23 DOI: 10.1002/cjce.25714

Naima Benmakhlouf

{"title":"Parametric investigation of drying processes for graphene nanomaterials: Heat and mass transfer analysis","authors":"Naima Benmakhlouf","doi":"10.1002/cjce.25714","DOIUrl":"https://doi.org/10.1002/cjce.25714","url":null,"abstract":"Graphene nanomaterials, due to their unique properties, require precise drying techniques to preserve both their structural integrity and functional performance. This study presents a comprehensive parametric investigation into the drying processes of graphene, with a focus on the interplay between key parameters such as temperature, airflow velocity, and material thickness. Using advanced computational fluid dynamics (CFD) and molecular dynamics (MD) simulations, we evaluate the effects of these parameters on heat and mass transfer dynamics, moisture removal efficiency, thermal stress distribution, and the overall structural stability of the nanomaterials during the drying process. The results reveal that critical temperature gradients significantly influence moisture diffusion rates, with higher drying temperatures (90°C) enhancing moisture removal but increasing thermal stress to ~200 MPa. In contrast, moderate drying at 70°C minimizes stress (~80 MPa) while maintaining efficient diffusion. The study identifies optimal airflow conditions (1.5–2.5 m/s) that maximize convective heat transfer, ensuring uniform drying and reducing energy consumption. Additionally, thicker graphene layers (>1 mm) exhibit higher thermal resistance, prolonging drying times, whereas thinner layers (<0.5 mm) dry faster but are more susceptible to overheating. These findings provide new insights into the fundamental drying mechanisms of graphene, offering a robust framework for optimizing drying techniques in industrial applications, particularly in nanomaterial processing.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 11","pages":"5704-5716"},"PeriodicalIF":1.9,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284796","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

The catalytic Baeyer–Villiger oxidation of cyclohexanone to ε-caprolactone over cerium–tin oxide 氧化铈锡催化环己酮Baeyer-Villiger氧化制ε-己内酯

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-17 DOI: 10.1002/cjce.25711

Ruolin Wang, Guanwen Chen, Miao Chen, Zhanke Wang

{"title":"The catalytic Baeyer–Villiger oxidation of cyclohexanone to ε-caprolactone over cerium–tin oxide","authors":"Ruolin Wang, Guanwen Chen, Miao Chen, Zhanke Wang","doi":"10.1002/cjce.25711","DOIUrl":"https://doi.org/10.1002/cjce.25711","url":null,"abstract":"Polycaprolactone synthesized via the ring-opening polymerization of ε-caprolactone assumes an irreplaceable and pivotal role in diverse fields including biology, medicine, chemical engineering, and environmental science. Herein, a series of cerium–tin oxide catalysts, denoted as Ce-Sn(x: y)-T, were synthesized via the co-precipitation method. The structure of the catalysts was characterized by means of X-ray diffraction, X-ray photoelectron spectroscopy, N₂ adsorption–desorption measurement, transmission electron microscopy, and so forth. The catalytic activity of Ce-Sn (x: y)-T was evaluated in the reaction of synthesizing ε-caprolactone via the oxidation of cyclohexanone with oxygen, and the optimal cerium–tin ratio and calcination temperature conditions for the preparation of the catalyst were obtained. The results indicated that there was a synergistic effect between Ce and Sn in the cerium–tin catalysts. Furthermore, a portion of Sn could incorporate into the lattice of CeO2 to form a cerium–tin solid solution, which increased the ratio of Ce3+/Ce4+ and the content of oxygen vacancies in the catalyst, thus improving the oxidation performance of the catalyst. Among them, the catalyst Ce-Sn(2:1)-500 exhibited the best catalytic performance. Under the optimal reaction conditions, the conversion rate of cyclohexanone could reach 91.41%, and the selectivity of ε-caprolactone was 91.46%.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 11","pages":"5586-5596"},"PeriodicalIF":1.9,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284788","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 investigation of distribution uniformity of solid particles in a gas–solid counter flow contact cyclone reactor under cold flow conditions for methanol to propylene 甲醇制丙烯冷流动条件下气固逆流接触旋流反应器内固体颗粒分布均匀性的数值研究

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-17 DOI: 10.1002/cjce.25710

Mingyang Zhang, Yannan Sun, Guowei Feng, Jie Cheng, Wenjie Zhu, Yaojun Guo, Xue Xiao

{"title":"Numerical investigation of distribution uniformity of solid particles in a gas–solid counter flow contact cyclone reactor under cold flow conditions for methanol to propylene","authors":"Mingyang Zhang, Yannan Sun, Guowei Feng, Jie Cheng, Wenjie Zhu, Yaojun Guo, Xue Xiao","doi":"10.1002/cjce.25710","DOIUrl":"https://doi.org/10.1002/cjce.25710","url":null,"abstract":"A gas–solid counter flow contact cyclone reactor (GS-CFCCR) was proposed for the methanol to propylene process. It is expected that the mixing of gas–solid phases can be enhanced by the vortices generated by the impinging stream, while the separation can be accelerated by the swirl flow induced by the guide vane. The CFD-DDPM tracer method was adopted to investigate the radial and circumferential distribution uniformity of solid particles in the mixing and reaction chamber. The results indicate that as particles move axially towards the guide vanes, the vortices generated by the impinging flow exhibit increased quantity and reduced size along the axial direction. This evolution causes a progressive deterioration of the radial distribution uniformity along the axial direction, with the mean deviation degree rising from 4.18 to 6.33, while the circumferential uniformity undergoes notable improvement. Furthermore, the effect of the solid particle inlet angle on the distribution performance was investigated. The results indicate that a design with a solid particle inlet angle below 90° is beneficial for achieving better mixing and separation performance. These findings provide a robust theoretical foundation for subsequent thermal modelling experiments, which hold significant potential to enhance industrial efficiency and achieve energy savings in future applications.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 11","pages":"5332-5346"},"PeriodicalIF":1.9,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284785","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

SrO-modified Pd/Al2O3 three-way catalyst with advanced activity for passive selective catalytic reduction operation sro改性Pd/Al2O3三元催化剂，具有先进的活性，用于被动选择性催化还原操作

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-17 DOI: 10.1002/cjce.25715

Yanmei Kong, Wenjing He, Longlong Zhang, Meihua Zhu, Shuanghua Cheng, Huasheng Lin, Li Lan, Shanhu Chen, Chuanjie Cheng, Liang Shen

{"title":"SrO-modified Pd/Al2O3 three-way catalyst with advanced activity for passive selective catalytic reduction operation","authors":"Yanmei Kong, Wenjing He, Longlong Zhang, Meihua Zhu, Shuanghua Cheng, Huasheng Lin, Li Lan, Shanhu Chen, Chuanjie Cheng, Liang Shen","doi":"10.1002/cjce.25715","DOIUrl":"https://doi.org/10.1002/cjce.25715","url":null,"abstract":"Passive selective catalytic reduction (pSCR) is a promising technology for exhaust aftertreatment applied in lean burn gasoline engines, which requires the three-way catalyst (TWC) to provide NH3 for the downstream SCR reaction process. Consequently, in the assessment of TWC catalytic performance for pSCR operation, not only the conversion efficiency of CO, HC, and NO should be taken into account, but the generation of NH3 is equally crucial. In this study, the modification of Pd/Al2O3 catalyst was realized with the assistance of SrO, and the catalytic performance in terms of both the conversion efficiency of CO/HC/NO and the production of NH3 was measured. Additionally, the physicochemical characteristics of the SrO-modified catalysts were evaluated in comparison to those of the unmodified Pd/Al2O3 through various analytic techniques. The findings indicate that incorporating SrO into the Pd/Al2O3 system enhances the conversion efficiency for CO, HC, and NO, and more importantly, a larger generation of NH3 is achieved, and the most effective concentration of SrO is identified as 4 wt.%. Based on the characterization results, it is found that SrO mainly interacts with tetra-coordinated or penta-coordinated Al sites on the surface of the catalyst, which brings about weakened surface acidity. The beneficial effect of SrO is primarily linked to its capacity to enhance the thermal durability of the Al2O3 support, facilitate the distribution of Pd-related particles, and adjust the chemical states of Pd species. Additionally, it could modify the reduction characteristics and the desorption performance of NH3 over the catalyst.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 11","pages":"5611-5622"},"PeriodicalIF":1.9,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284786","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 kinetic model to predict the catalyst lifetime in methanol to olefins conversion 预测甲醇制烯烃过程中催化剂寿命的动力学模型

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-17 DOI: 10.1002/cjce.25684

Saeed Sahebdelfar, Farhad Khorasheh

引用次数: 0

Microscopic regulation and displacement mechanism of polymer–microsphere plug combination for enhanced oil recovery in sandstone reservoirs 聚合物-微球桥塞组合提高砂岩油藏采收率的微观调控及驱替机理

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-17 DOI: 10.1002/cjce.25713

Yongtao Ju, Hongmei Luo, Xuena Zhang, Jie Zhang

{"title":"Microscopic regulation and displacement mechanism of polymer–microsphere plug combination for enhanced oil recovery in sandstone reservoirs","authors":"Yongtao Ju, Hongmei Luo, Xuena Zhang, Jie Zhang","doi":"10.1002/cjce.25713","DOIUrl":"https://doi.org/10.1002/cjce.25713","url":null,"abstract":"To investigate the mechanisms of deep regulation and displacement technologies for enhancing oil recovery in sandstone reservoirs, a proprietary profile control experimental system integrated with real-time computed tomography scanning was utilized to achieve, for the first time, full-cycle three-dimensional visualization of the microscopic residual oil displacement process. Despite the promising results, pore blockage and long-term stability of the injected plugs require further investigation. By conducting comparative analyses of the evolution characteristics of microscopic residual oil saturation before and after regulation and displacement under varying plug conditions, the changes in the spatial distribution and occurrence state of microscopic residual oil were quantitatively examined. Results indicate that: (a) Microscopic residual oil primarily exists in network-like, porous, and isolated forms, with network-like and porous forms accounting for 82.93%–91.41%, the reduction of which indicates the improved displacement effectiveness and better recovery subsequently; (b) Regulation and displacement effectively block high-permeability channels and increase displacement pressure in medium-to-small pores, network-like and porous residual oil gradually transitions into isolated residual oil after the deep regulation and displacement, with its proportion increasing from 0.8% to 39.6%; (c) The polymer–microsphere plug combination exhibits superior performance compared to a single plug, the recovery of the combination plug reaches 1.11 times that of the single plug method, presenting a great potential field applications by taking care of some scale-up considerations, like formation heterogeneity, chemical stability, and so on. The research provides theoretical support for designing regulation and displacement strategies for water-flooding sandstone reservoirs.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 11","pages":"5690-5703"},"PeriodicalIF":1.9,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284787","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 发行亮点

IF 1.6 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-15 DOI: 10.1002/cjce.25327

引用次数: 0

Weighing risks against GHG reduction benefits in emerging green technologies 权衡新兴绿色技术的风险与温室气体减排效益

IF 1.9 4区工程技术

Canadian Journal of Chemical Engineering Pub Date : 2025-04-10 DOI: 10.1002/cjce.25692

Federica Tamburini, Valerio Cozzani, Nicola Paltrinieri, Thomas Alan Adams II

{"title":"Weighing risks against GHG reduction benefits in emerging green technologies","authors":"Federica Tamburini, Valerio Cozzani, Nicola Paltrinieri, Thomas Alan Adams II","doi":"10.1002/cjce.25692","DOIUrl":"https://doi.org/10.1002/cjce.25692","url":null,"abstract":"Green technologies represent promising strategies for mitigating carbon emissions and combating global warming. However, their implementation in civil and industrial applications is not without risks, as intrinsic uncertainties and latent safety concerns can threaten their effective deployment. To quantitatively evaluate the trade-off between environmental benefits and safety issues, this work develops an innovative methodological approach. This approach aims to determine the risk–benefit profile of emerging green solutions through the definition and calculation of a new key performance indicator, the risk of CO2 avoided index (RCAI). By doing so, it provides a comprehensive understanding of the effectiveness of the green technology implementation and serves as a powerful tool for supporting stakeholder decision-making. In order to demonstrate the systematic nature and versatility of the methodological approach, it has been applied to a case study involving a carbon capture and storage (CCS) system retrofitted onto a power plant. The results underscore its flexibility and effectiveness, highlighting the importance of sustainable and safe technological advancements in the fight against global warming.","PeriodicalId":9400,"journal":{"name":"Canadian Journal of Chemical Engineering","volume":"103 10","pages":"4661-4680"},"PeriodicalIF":1.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjce.25692","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037627","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