Chemical Engineering & Technology最新文献

{"title":"Efficient Catalytic Behavior by Cobalt and Manganese Oxides Species Supported on a 3DOM Carbon","authors":"Yudi Carolina Imbachi Claros,&nbsp;Cristian David Miranda Muñoz,&nbsp;Laura Cristina Urán Castaño,&nbsp;Adriana Echavarría Isaza,&nbsp;Carlos Eduardo Ostos Ortiz,&nbsp;María de la Menta Ballesteros Martín,&nbsp;Angel Rabdel Ruíz-Salvador,&nbsp;Alfonso Enrique Ramírez Sanabria","doi":"10.1002/ceat.70271","DOIUrl":"https://doi.org/10.1002/ceat.70271","url":null,"abstract":"<div>\u0000 \u0000 <p>A series of heterogeneous catalysts was synthesized, characterized, and evaluated for the total oxidation of toluene, a representative volatile organic compound (VOC). Metal oxides (Mn<i>_x</i>O<i>_y</i>, Co₃O₄, and Co₃O₄–Mn<i>_x</i>O<i>_y</i>) were deposited onto three-dimensionally ordered mesoporous (3DOM) carbon. The support exhibited a high surface area (325 m² g⁻¹) and uniform mesoporosity (≈3.7 nm), enabling effective dispersion of the active phases. X-ray diffraction (XRD) and transmission electron microscopy (TEM) confirmed the preservation of the ordered structure after impregnation, whereas x-ray photoelectron spectroscopy (XPS) revealed multiple oxidation states of cobalt (Co²⁺/Co³⁺) and manganese (Mn²⁺/Mn³⁺/Mn⁴⁺), favoring redox cycling and oxygen mobility. Catalytic tests demonstrated that the bimetallic oxide system achieved complete toluene conversion (1000 ppm) with the highest activity (1.35 mol of TOL(Toluene) g⁻¹s⁻¹), outperforming single-metal catalysts (Co₃O₄/3DOM: 0.84 mol of TOL g⁻¹s⁻¹; Mn<i>_x</i>O<i>_y</i>/3DOM: 1.22 mol of TOL g⁻¹s⁻¹).</p>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148386463","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":"Synergistic Effect of Hydrogen Enrichment on Dual-Fuel CI Engine Fueled With Mixed Biodiesel Blends","authors":"Mariyappan Chandirasegaran,&nbsp;Sathiyagnanam Amudhavalli Paramasivam,&nbsp;Karthikeyan Subramanian","doi":"10.1002/ceat.70272","DOIUrl":"https://doi.org/10.1002/ceat.70272","url":null,"abstract":"<div>\u0000 \u0000 <p>The growing oil demand, sustainability concerns, and shifting oil prices have required alternative energy exploration. This experiment evaluated the efficiency, greenhouse gas emissions, and combustible properties of a compression ignition engine using mixed biodiesel (20% cotton, 10% mahua biofuel) and hydrogen (H₂) induction rates of 4, 8, and 12 liters per minute (LPM). At full load, MB20 with 8 LPM hydrogen flow had a maximum brake thermal efficiency (BTE) of 5.31% and a minimum brake specific fuel consumption (BSFC) of 0.24 kJ/kWh. These testing conditions boosted cylinder pressure by 5%–7% and heat release by 15%–20% over regular diesel. CO, HC, and smoke opacity dropped 45%–50%, 28%–32%, and 18%–22%, respectively; however, NO<i>_x</i> emissions rose 675 ppm (30%–35%) due to greater combustion temperatures and more oxygen. H₂ enrichment enhances combustion performance and significantly reduces pollutant emissions. Combining H₂ with biodiesel promotes clean, renewable energy options, supporting global sustainable development goals.</p>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148386464","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":"Hybrid RSM–ANN Modeling of F− Ion Adsorption Onto Al-Modified Bentonite: Kinetic and Isotherm Insights","authors":"Swati Dubey,&nbsp;Avanish Kumar","doi":"10.1002/ceat.70268","DOIUrl":"https://doi.org/10.1002/ceat.70268","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>In this work, Al-modified bentonite has been synthesized and identified as an efficient adsorbent for fluoride removal from water. Optimization and modeling of process parameters were completed by response surface methodology (RSM) on the basis of the Box–Behnken design, with validation performed using an artificial neural network (ANN) model developed in MATLAB. Reliability of the RSM model was pretty high: <i>R</i>² = 0.9861; adjusted <i>R</i>² = 0.9736; Adeq Precision = 30.66; <i>p</i> &lt; 0.0001. The maximum amount of fluoride removal, approximately 78%, could be achieved at a dosage of 1 g of adsorbent with a stirring of 30 min and an initial fluoride concentration of 5 mg/L. Data best fitted the Langmuir isotherm, with <i>R</i>² = 0.9783, which indicated monolayer adsorption following pseudo-second-order kinetics with an <i>R</i>² value of 0.997, indicating chemisorption as the rate-limiting step. The Levenberg–Marquardt backpropagation algorithm was applied to train the ANN model, which produced outstanding predictive accuracy with <i>R</i> &gt; 0.99.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>\u0000 <p>Al-modified bentonite showed 78% fluoride removal under optimized conditions.</p>\u0000 </li>\u0000 \u0000 <li>\u0000 <p>Adsorption followed Langmuir isotherm and pseudo-second-order kinetics.</p>\u0000 </li>\u0000 \u0000 <li>\u0000 <p>RSM and ANN models showed excellent agreement (<i>R</i>² &gt; 0.98).</p>\u0000 </li>\u0000 \u0000 <li>\u0000 <p>Hybrid modeling effectively optimized multiparameter adsorption processes.</p>\u0000 </li>\u0000 \u0000 <li>\u0000 <p>Demonstrates a sustainable, low-cost alternative for groundwater defluoridation.</p>\u0000 </li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148386462","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":"Analysis of the Coupled Variations of Holdup and Droplet Diameter Based on Machine Learning Methods","authors":"Xingchen Ji,&nbsp;Lei Jin,&nbsp;Yu Zhou,&nbsp;Meng Zhang,&nbsp;Caishan Jiao,&nbsp;Tingting Liu,&nbsp;Qiang Zhao,&nbsp;Yang Gao","doi":"10.1002/ceat.70269","DOIUrl":"https://doi.org/10.1002/ceat.70269","url":null,"abstract":"<div>\u0000 \u0000 <p>Due to limited research on holdup-droplet diameter coupled variations and poor predictive performance of machine learning (ML) models on small datasets, this study integrates LASSO, support vector regression (SVR), and random forest regression (RFR) to develop a parameter analysis algorithm. The algorithm features generalization for small cross-system datasets and parameter physical significance analysis capability. Applying it, we explored the combined effects of 14 experimental operating parameters on holdup and Sauter mean diameter, with the model's prediction error for their coupled variations ≤10%. It provides a new perspective for understanding hydrodynamic characteristics in pulsed extraction columns, guides key process equipment design and operational optimization, and lays a theoretical foundation for engineering applications of related ML methods.</p>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358200","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":"A Renewable Solar-Thermal Pathway for Complete Red Mud Upcycling","authors":"Alberto Boretti","doi":"10.1002/ceat.70270","DOIUrl":"https://doi.org/10.1002/ceat.70270","url":null,"abstract":"<div>\u0000 \u0000 <p>Red mud, the highly alkaline by-product of the Bayer alumina process, creates a major environmental challenge. Global annual production exceeds 180 million tons, with accumulated stockpiles nearing 4 billion tons, posing significant disposal risks. This perspective outlines an innovative multistage pathway for complete valorization of this residue via a circular economy model. It integrates: (1) neutralization and chemical activation of red mud; (2) recovery of critical trace metals (e.g., Sc, V, and rare earth elements [REEs]) to reduce toxicity and generate economic value; and (3) hydrothermal conversion of the remaining aluminosilicate residue into high-performance ZSM-5 zeolite. Central to this sustainable process is concentrated solar power (CSP), which provides the high-temperature thermal energy for calcination and synthesis, decoupling it from fossil fuels. The resulting ZSM-5 zeolite applies directly in catalysis, construction, and environmental remediation, closing the material loop.</p>\u0000 </div>","PeriodicalId":10083,"journal":{"name":"Chemical Engineering & Technology","volume":"49 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358198","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":"Amine-Grafted MIL-101(Cr) for Superior CO2 Capture: Performance, Kinetics, and Thermodynamics","authors":"Yandi Li,&nbsp;Songyi Ji,&nbsp;Rong Zhang,&nbsp;Xiaoling Li,&nbsp;Xiandong Hao,&nbsp;Ning Zhao,&nbsp;Bo Wang,&nbsp;Zhiyong Xu,&nbsp;Wenbo Zhao","doi":"10.1002/ceat.70256","DOIUrl":"https://doi.org/10.1002/ceat.70256","url":null,"abstract":"<div>\u0000 \u0000 <p>Carbon dioxide capture is critical for mitigating climate change. Amine-functionalized MIL-101(Cr) shows great promise due to its high stability and tunable porosity. We optimized its synthesis (160°C, 24 h, 150°C activation) and investigated diethylenetriamine (DETA) loading effects. The 50 wt% DETA composite achieved a CO₂ uptake of 1.25 mmol/g at 30°C and 0.1 bar, nearly six times that of pristine MIL-101(Cr). Kinetic and isotherm data were well described by the pseudo-second-order and Langmuir models. Thermodynamic analysis revealed Δ<i>H</i> = −54.78 kJ/mol and Δ<i>S</i> = −142.13 J/(mol K), confirming an exothermic, chemisorption-dominated process. We further optimized adsorption/desorption conditions, identifying optimal working temperatures of 269.47 K (adsorption) and 388.20 K (desorption). This work provides clear guidance for designing high-performance metal–organic framework (MOF)-based CO₂ capture materials.</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":"148324414","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":"Hydrodynamics in a Bubble Column—Part 2: Three-Phase Flow","authors":"Anna-Elisabeth Sommer,&nbsp;Mazen Draw,&nbsp;Lantian Wang,&nbsp;Jan Schmidtpeter,&nbsp;Hendrik Hessenkemper,&nbsp;Josefine Gatter,&nbsp;Kerstin Eckert,&nbsp;Roland Rzehak","doi":"10.1002/ceat.70259","DOIUrl":"https://doi.org/10.1002/ceat.70259","url":null,"abstract":"<p>Multiphase computational fluid dynamics simulation is a useful engineering tool once appropriate closure models are established. However, experimental data of a quality required to assess the validity of different models are largely lacking for three-phase flows containing both gas bubbles and solid particles dispersed in a liquid. Therefore, the present study extends a database on two-phase flows in a bubble column described previously in this journal by further experiments on three-phase flows. Again a combination of particle image velocimetry and shadowgraphy is applied, the former now also providing the solid phase fraction and velocity in addition to the liquid velocity and the latter measuring the gas fraction and velocity. The experimental data are compared with simulations based on models previously applied with success to two-phase bubbly and particulate flows. Reasonably good predictions are obtained also for the present three-phase flows over a range of operating conditions.</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.70259","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324417","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":"DTB-Inspired Crystallizer Flow Optimization via Vortex Regulation: Li2CO3 Quality and Mixing Efficiency","authors":"Xujie Shi,&nbsp;Yanfang Ma,&nbsp;Xin Liu,&nbsp;Yanlin Li,&nbsp;Xinqiao Shi,&nbsp;Zhenhua Cui,&nbsp;Haiping Zhao","doi":"10.1002/ceat.70260","DOIUrl":"https://doi.org/10.1002/ceat.70260","url":null,"abstract":"<div>\u0000 \u0000 <p>To address poor particle size uniformity, unstable yield, and low reproducibility in Li₂CO₃ reactive crystallization from salt lake brine, this study optimizes a draft-tube-baffle (DTB)-inspired crystallizer by tuning its internal flow field. Using computational fluid dynamics (CFD) simulations and experiments, six adjustable parameters were evaluated. Sensitivity analysis shows that rotational speed has the highest energy sensitivity (324%), whereas agitator and draft tube heights are critical for flow efficiency (&gt;158% sensitivity). Under optimized conditions, mixing time drops to 8.8 s, specific mixing energy to 4.55 kJ·m⁻³, saving 79.6% energy versus conventional operation. Crystallization tests confirm the optimized flow eliminates dead zones, yielding Li₂CO₃ with ≥98.18% purity, &lt;1.4% spatial purity variation, uniform morphology, and narrow size distribution (Span &lt;1.0). This work provides a lab-scale basis for industrial DTB optimization, though scale-up validation is required.</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":"148324416","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":"A Study of Low-Cost Kaolin and Rice Husk Ash Flat Ceramic Supports for Carbon Membrane Development","authors":"Thaís Martins Neves,&nbsp;João Pedro Weidlich Franco,&nbsp;Nilson Romeu Marcilio,&nbsp;Isabel Cristina Tessaro","doi":"10.1002/ceat.70263","DOIUrl":"https://doi.org/10.1002/ceat.70263","url":null,"abstract":"<div>\u0000 \u0000 <p>Inorganic membranes can be applied in processes occurring at high temperatures and pressures. Carbon membranes (CMs) possess molecular-sized pores capable of selectively separating gases of similar molecular dimensions, such as CO₂ and CH₄. These CMs are typically fabricated on commercial alumina ceramic substrates, which are costly. This study explores the use of kaolin, a natural and low-cost material, and rice husk ash (RHA) to fabricate ceramic supports. The impact of varying RHA content on the properties of the supports was assessed. The supports obtained from kaolin and RHA exhibited the phases of mullite and cristobalite. The 90K10RHA support demonstrated lower surface roughness, enhanced mechanical strength, and superior gas permeation performance. Gas transport through the membranes prepared on kaolin–RHA supports was governed by Knudsen diffusion. Therefore, the membranes fabricated on low-cost supports show promise for the separation of light gases and larger hydrocarbons.</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":"148324408","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":"Electrodynamic Fragmentation as Treatment Prior to Concrete Comminution","authors":"Tatiane I. Hentges,&nbsp;Margarita Mezzetti,&nbsp;Christine Hecker,&nbsp;Oleg Popov,&nbsp;Pierre Landgraf,&nbsp;Sérgio C. Angulo,&nbsp;Luís M. Tavares,&nbsp;Holger Lieberwirth","doi":"10.1002/ceat.70261","DOIUrl":"https://doi.org/10.1002/ceat.70261","url":null,"abstract":"<p>The aim of this work was to evaluate how different energy levels of electrodynamic fragmentation (EDF) affect concrete weakening. A reference concrete (Ref-45) and another with a high limestone filler content (LF-35) were produced and subjected to EDF at specific energies of 0.54, 0.83, and 1.67 kWh/t. A substantial reduction in strength was observed at the intermediate level for Ref-45 (42%) and a smaller reduction for LF-35 (7%). At the highest energy level, nearly half of the samples fragmented during EDF, and reductions exceeded 60%. However, fragment size distributions were not found to vary as a function of the concretes studied. At intermediate and high energy levels, EDF reduced concrete strength, which can improve the quality of recycled aggregates after comminution.</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.70261","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324409","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}