Chemical Engineering & Technology最新文献

{"title":"Influence of Particle Aspect Ratio on Translational Collision Dynamics in Wall-Bounded Turbulence","authors":"Connor H. Nolan,&nbsp;Lee F. Mortimer,&nbsp;Peter K. Jimack,&nbsp;Michael Fairweather","doi":"10.1002/ceat.70262","DOIUrl":"https://doi.org/10.1002/ceat.70262","url":null,"abstract":"<p>This study examines how particle shape influences collision dynamics in turbulent channel flow using direct numerical simulation (DNS) with Lagrangian tracking and fully resolved four-way coupling. Rigid ellipsoids across aspect ratios are simulated with inertia-driven translation, hydrodynamic forces, and quaternion-based rotation. Needle-like particles align more strongly with the local shear, reducing turbulent scattering and producing lower collision velocities with narrower angle distributions. Nearly spherical particles respond more intensely to turbulence, yielding broader collision statistics. Some features, such as spanwise velocity fluctuations, remain largely shape-independent, highlighting the dominance of lateral turbulent motions.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ceat.70262","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324410","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}

{"title":"Syngas Production via Bi-Reforming of Methane Using a Hydroxyapatite Supported Nickel Catalyst","authors":"Thanh Son Phan,&nbsp;Doan Pham Minh","doi":"10.1002/ceat.70258","DOIUrl":"https://doi.org/10.1002/ceat.70258","url":null,"abstract":"<div>\u0000 \u0000 <p>A Ni/hydroxyapatite (HAP) catalyst was prepared, characterized, and investigated in the production of synthesis gas (syngas) from biogas through the bi-reforming of methane (BRM). Under mild operating conditions (700°C reaction temperature and 1.4 bar total pressure, inlet molar composition of CH₄/CO₂/H₂O/N₂ = 28.6/31.4/25.7/14.3, GHSV = 27 794 <span></span><math></math>, 50 h-on-stream), this catalytic material has demonstrated promising results with 78% methane conversion. Increasing the steam-to-carbon (S/C, or steam-to-methane) molar ratio enhanced methane conversion while maintaining catalyst stability by decreasing solid carbon formation, as evidenced by characterization of the used catalyst.</p>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324357","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}

{"title":"Effect of Internal and Acid Gas Coupling on the Flue Gas Decarbonization Process in Spouted Beds","authors":"Qiyu Li,&nbsp;Qin Bai,&nbsp;Zhian Deng,&nbsp;Feng Wu","doi":"10.1002/ceat.70264","DOIUrl":"https://doi.org/10.1002/ceat.70264","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the application of spouted bed technology in CO₂ capture by incorporating internals and simultaneously establishing a new prediction model for acid gas. First, to address the insufficient gas–solid radial mixing in conventional spouted beds, three enhanced configurations are proposed: a spouted bed with longitudinal vortex generators (LVG SB), an integral multi-jet spouted-fluidized bed (IMJSFB), and a spouted bed equipped with swirl blade nozzles (SBN SB). Second, considering the limitation of single-component gas removal in conventional spouted beds, the simultaneous removal process of coupled acid gases in the spouted bed is explored. The results indicate that the modified systems achieve semidry flue gas decarbonization efficiencies of 75.13%, 79.77%, and 82.59%, respectively. When acid gases are coupled, the decarbonization efficiency decreases to 47.7%.</p>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324415","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}

{"title":"Pulse-Jet Bag Filter Flow Field Design Based on Intake Kinetic Energy Dissipation","authors":"Yongrui Liu,&nbsp;Lei Zheng,&nbsp;Ju Han,&nbsp;Penglong Li,&nbsp;Weixi Zheng,&nbsp;Hongchao Ji,&nbsp;Wanxing Liu","doi":"10.1002/ceat.70252","DOIUrl":"https://doi.org/10.1002/ceat.70252","url":null,"abstract":"<div>\u0000 \u0000 <p>The pulse-jet bag filter suffers from short bag life and low dust sedimentation efficiency. To address this issue, this study establishes a kinetic energy–dissipation model based on the Reynolds stress transport equation to analyze the energy-dissipation mechanism and designs three intake duct configurations guided by the core principle of early kinetic energy dissipation—rather than by uniform airflow distribution. CFD-DPM simulations were validated against experimental velocity measurements at monitoring points (maximum deviation 9.8%). The dissipation-box intake duct reduces the maximum airflow velocity from 22.3 to 6.1 m s⁻¹ and equipment resistance from 1279.2 to 1237.9 Pa. Kinetic energy density in the hopper and middle casing decreases by more than 60%. Early dissipation of intake kinetic energy without increasing resistance extends bag life and improves dust sedimentation efficiency, offering new insights for pulse-jet bag filter optimization.</p>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174156","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}

{"title":"Micro- and Macrostructure Effects on Hydrogen Release Using 3D-Printed Reactor-Catalysts","authors":"Ezrah Morriën,&nbsp;Daan Giesen,&nbsp;Javier García-Martínez,&nbsp;Emna Charfi,&nbsp;Gadi Rothenberg","doi":"10.1002/ceat.70247","DOIUrl":"https://doi.org/10.1002/ceat.70247","url":null,"abstract":"<p>We report the design, fabrication, and testing of 3D-printed Al–stainless steel reactor-catalyst monoliths for potassium borohydride hydrolysis. Three scaffold geometries—Gyroid, Schwarz P, and Schwarz P4534—were produced via selective laser melting. The monoliths were subjected to tailored acid and base leaching, increasing internal porosity and exposing and activating the catalytic sites. Structural and compositional analyses, including SEM-EDX, XPS, and x-ray diffraction (XRD), confirmed the homogeneous distribution of Al, Fe, Ni, and Cr, as well as the formation of an FeAl crystalline phase. Hydrogen release experiments at industrially relevant conditions showed that the Schwarz P and P4534 geometries gave the fastest hydrogen evolution, whereas the Gyroid structure was the slowest. This study highlights how 3D-printed macrostructure design and surface activation can be combined to optimize metallic catalysts for a variety of applications.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ceat.70247","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174157","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}

{"title":"Flow Pattern Transition and Thermohydraulic Performance in Microchannels With Opposing Rigid Ribs","authors":"Tianyu Wang,&nbsp;Khurshid Ahmad,&nbsp;Andrei Chorny,&nbsp;Dalei Jing","doi":"10.1002/ceat.70254","DOIUrl":"https://doi.org/10.1002/ceat.70254","url":null,"abstract":"<div>\u0000 \u0000 <p>This article investigates the impact of opposing rigid ribs (ORRs) on the flow pattern transitions and thermohydraulic performance of fluid flow inside microchannels across an inlet Reynolds number range of 50–500. Furthermore, a comparative analysis of various ORR designs is conducted to evaluate and compare their thermohydraulic performance. The results indicate that introducing a single ORR pair design induces a transition from laminar to vortex flow as the ORR height decreases. This enhances <i>Nu</i> but also increases pressure loss. In contrast, increasing the number of ORR pairs weakens the heat transfer performance by blocking the flow pattern transition. The four ORR pair designs reduce <i>Nu</i> by up to 35.46% compared to the single ORR pair design, while increasing the maximum pressure drop by 357.45%. These findings offer valuable insights into the design of microchannel structures for enhanced thermal management.</p>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173840","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}

{"title":"Experimentally Overcoming the Limitations of Methanol Synthesis From Syngas by Sorption Enhancement","authors":"Enrico Antonuccio,&nbsp;Frédéric Bornette,&nbsp;Guillaume Aubert,&nbsp;David Edouard,&nbsp;Pascal Fongarland","doi":"10.1002/ceat.70251","DOIUrl":"https://doi.org/10.1002/ceat.70251","url":null,"abstract":"<p>Methanol is an excellent candidate as a low carbon footprint fuel for the energy transition. Anyhow, the yield of the conventional methanol synthesis from CO₂ is limited on the one hand by the thermodynamic equilibrium of the exothermic reaction, and on the other by a parallel reaction, reverse water–gas shift (rWGS). To improve the yield of methanol, one strategy lies in the use of a sorbent that can adsorb water and/or methanol in situ, thus displacing the chemical equilibrium rightward. This is made possible by approaching the “SERP” (sorption enhanced reaction process) technology. By carrying out the process at lab scale under several operating conditions, the optimal operative window was identified. Additionally, the results are suitable for an accurate mathematical modeling and further optimization via simulation.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ceat.70251","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173838","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}

{"title":"Minimizing Entrainment From Flashing Feeds: Analysis of Process Parameters and Orifice Design","authors":"Anna Denecke,&nbsp;Stephan Scholl,&nbsp;Katharina Jasch","doi":"10.1002/ceat.70250","DOIUrl":"https://doi.org/10.1002/ceat.70250","url":null,"abstract":"<p>This study investigates droplet entrainment from flashing feeds in a forced circulation flash evaporator, focusing on how liquid breakup governs droplet carryover into the vapor phase. Experiments with water and three orifices of different aspect ratios were performed. The effects of liquid velocity, superheat, and orifice geometry were evaluated. For water, a superheat degree of about 20 K marks the transition from mechanically to flashing dominated breakup, accompanied by a change from linear to exponential increase of entrainment with a gas load factor of about 2 Pa^0.5. Longer orifices promote internal flashing and finer atomization, whereas shorter orifices favor external flashing and coarser sprays, but may form wall impinging jets with locally very high entrainment.</p>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ceat.70250","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173688","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}

{"title":"The Importance of Local Variations of Axial Dispersion Coefficients","authors":"Luca Mastroianni,&nbsp;Francesco Taddeo,&nbsp;Alessandro Esposito,&nbsp;Martino Di Serio,&nbsp;Dmitry Murzin,&nbsp;Tapio Salmi,&nbsp;Vincenzo Russo","doi":"10.1002/ceat.70253","DOIUrl":"https://doi.org/10.1002/ceat.70253","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>A variable axial dispersion model (VADM), accounting for local variations in the axial dispersion coefficient, was compared with the classical constant axial dispersion model (CADM). The two models reproduced the same concentration profile at the reactor outlet in a step-response experiment, enabling a fair comparison under typical kinetic scenarios. The simulations showed that CADM should be limited to case studies in which convection is the prevailing transport mechanism (<i>Pe</i> &gt; 50). For lab-scale PBR with important backmixing effects, the CADM is a good flow model when the apparent reaction order does not change sign during the chemical transformation. If the reaction rate exhibits a maximum along the reactor length (e.g., surface mechanism), averaging the axial dispersion coefficient results in an inappropriate approximation. Nonlinear regression analysis illustrated that using a wrong flow model can lead to large errors in the estimation of the kinetic parameters.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>A variable axial dispersion model (VADM) was developed and implemented showing high prediction power.</li>\u0000 \u0000 <li>A Péclet number semiempirical function was implemented to simulate different fluid-dynamic conditions.</li>\u0000 \u0000 <li>VADM shown substantial differences with classical axial dispersion models when surface rate expressions are used.</li>\u0000 \u0000 <li>Rate expressions passing through a maximum value led to the highest divergency between VADM and CADM.</li>\u0000 \u0000 <li>It was demonstrated that high errors can be obtained in parameter estimation when choosing the wrong flow model.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ceat.70253","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173691","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}

{"title":"Antioxidant Fractions From Leptocarpha rivularis Using Sequential Supercritical Extraction","authors":"Claudia Marillán,&nbsp;Edgar Uquiche,&nbsp;Paulina Sepúlveda","doi":"10.1002/ceat.70246","DOIUrl":"https://doi.org/10.1002/ceat.70246","url":null,"abstract":"<div>\u0000 \u0000 <p>Supercritical extraction was conducted in a sequential three-stage process to increase the extraction of antioxidant compounds from <i>Leptocarpha rivularis</i>, at 40°C or 60°C, with Stage 1 at 20 or 25 MPa using CO₂, Stage 2 at 35 or 50 MPa using CO₂, and Stage 3 at 35 or 50 MPa using ethanol-modified CO₂ (5 wt%). The total content of flavonoids and alkaloids was quantified. The antioxidant and acetylcholinesterase inhibitory capacity correlated with the content of bioactive compounds. Sequential supercritical extraction was a useful method to fractionate extracts by increasing pressure or adding a modifier, improving the antioxidant compounds’ solubility.</p>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 6","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173747","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}