Chemical Engineering Science最新文献_第4页

Silica-based amphiphilic nanofluid for enhanced heavy oil recovery: performance and mechanistic insights 用于提高稠油采收率的硅基两亲性纳米流体：性能和机理见解

IF 4.7 2区工程技术

Chemical Engineering Science Pub Date : 2026-06-28 DOI: 10.1016/j.ces.2026.124549

Yu He, Wanfen Pu, Rui Liu, Qingyuan Chen, Hongli Liu, Shitong Jiang, Jingjing Zhong

{"title":"Silica-based amphiphilic nanofluid for enhanced heavy oil recovery: performance and mechanistic insights","authors":"Yu He, Wanfen Pu, Rui Liu, Qingyuan Chen, Hongli Liu, Shitong Jiang, Jingjing Zhong","doi":"10.1016/j.ces.2026.124549","DOIUrl":"https://doi.org/10.1016/j.ces.2026.124549","url":null,"abstract":"In the process of chemical viscosity reduction for EOR in heavy oil reservoirs, nanoparticles have demonstrated significant potential due to their unique physicochemical properties. In this study, an amphiphilic nanofluid was synthesized, and its performance was systematically evaluated through interfacial tension (IFT), wettability alteration, emulsification, oil-film detachment, and core flooding experiments. Furthermore, molecular dynamics simulations were conducted to elucidate the microscopic mechanisms responsible for viscosity reduction. The results demonstrated that the nanofluid exhibited outstanding interfacial activity, reducing the IFT from approximately 30 mN/m to 0.5 mN/m and effectively transforming oil-wet rock surfaces to a water-wet state. A stable O/W emulsion was formed, resulting in a viscosity reduction of up to 98% at 80% water cut. Oil-film detachment tests confirmed that the nanofluid completely removed adhered oil films from rock surfaces within 12 h. Core flooding experiments demonstrated that the nanofluid enhanced recovery by 24.75%, representing an additional recovery of 10.83% compared with the surfactant alone. MD simulations revealed strong interactions between the nanofluid and asphaltene molecules, which disrupted asphaltene aggregation and inhibited the formation of large aggregates. Furthermore, the strong confinement effect of the nanofluid on asphaltenes facilitated the formation of stable O/W emulsions, elucidating the molecular mechanism underlying viscosity reduction.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"36 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148356311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Discharge of packed particles through side orifice driven by gas pressure above 在上方气体压力的驱动下，堆积颗粒通过侧孔排出

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-10 DOI: 10.1016/j.ces.2026.123563

Donghui Liu, Yongdou Wang, Quanhong Zhu

{"title":"Discharge of packed particles through side orifice driven by gas pressure above","authors":"Donghui Liu, Yongdou Wang, Quanhong Zhu","doi":"10.1016/j.ces.2026.123563","DOIUrl":"10.1016/j.ces.2026.123563","url":null,"abstract":"<div><div>This work aimed to explore the pressure-driven discharging behavior of packed particles through the side orifice. The gas pressure (<em>P</em>) above inventory surface in the hopper was raised by introducing air at a constant rate. A column was assigned above to continuously replenish the discharged particles so that the inventory level in the hopper, <em>P</em>, and <em>q</em><sub>p</sub> (mass discharge rate) could maintain for a long time. Eventually, the influence of <em>P</em> on <em>q</em><sub>p</sub> could be rigorously explored and analyzed. <em>q</em><sub>p</sub> was measured to increase with increasing <em>P</em> or <em>d</em><sub>o</sub> (orifice diameter), both being concave functions. When the distance from the orifice center toward inventory surface in the hopper was fixed, <em>q</em><sub>p</sub> could be well correlated to <em>Q</em><sub>leak</sub> (gas leakage through the orifice) in quadratic form. Thus, the aforementioned increase of <em>q</em><sub>p</sub> with <em>P</em> or <em>d</em><sub>o</sub> could be ascribed to that <em>Q</em><sub>leak</sub> was raised and the particle discharge driven by the gas pressure above differed significantly from the pneumatic conveying. The Beverloo model was proved to be adequate for correlating <em>q</em><sub>p</sub> and <em>d</em><sub>o</sub> at all levels of <em>P</em> (<1.5 kPa). <em>C</em> embedded therein was fitted to be ∼ 0.007 (independent of <em>P</em>). The huge difference from that (∼0.20) drawn for the gravity-driven particle discharge resulted probably from distinct mechanisms for the arch above the orifice to decompose. <em>k</em> decreased from –49 to –159 with <em>P</em><sub>d</sub> increasing from 0.3 kPa to 1.5 kPa, agreeing with the experimental observation that the actual cross-section for the particle discharge was gradually enlarged.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123563"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 Semi-Resolved LBM-DEM Coupling Approach: Methodology, Modeling, and Validation 半分辨LBM-DEM耦合方法：方法论、建模和验证

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-10 DOI: 10.1016/j.ces.2026.123562

Yin Zhu, Liming Che, Haiqiang Lin, Bin Wei, Hua Zhou

{"title":"A Semi-Resolved LBM-DEM Coupling Approach: Methodology, Modeling, and Validation","authors":"Yin Zhu, Liming Che, Haiqiang Lin, Bin Wei, Hua Zhou","doi":"10.1016/j.ces.2026.123562","DOIUrl":"10.1016/j.ces.2026.123562","url":null,"abstract":"<div><div>A semi-resolved Lattice Boltzmann Method − Discrete Element Method (LBM-DEM) coupling approach is proposed to overcome the unphysical velocity oscillations in the transitional regime, where the particle-to-grid size ratio approaches unity. Kernel function approximation is employed to smooth the particle-to-grid mapping, while various drag force models are adopted to describe the particle–fluid interactions. Correspondingly, the governing equations of the modified Immersed Moving Boundary-LBM (IMB-LBM) are adapted to accurately describe the fluid–solid coupling effects. The proposed method was systematically validated through a series of benchmark simulations, including sedimentation of a nylon ball and a steel ball, a fluidized bed, and a spouted bed. Results demonstrate that the proposed semi-resolved framework effectively bridges resolved and unresolved LBM-DEM regimes. Parameter analysis identifies the Energy Minimization Multi-Scale (EMMS) model as the most suitable drag correlation for fluidized beds. Furthermore, background expansion factors of 3–4 optimally balance computational accuracy and efficiency. This work extends the applicability of the LBM-DEM method, providing a robust and unified framework for modeling particle–fluid systems.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123562"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Experimental study on intermittent nitrogen injection to eliminate hydrate blockage 间歇式注氮消除水合物堵塞的实验研究

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-10 DOI: 10.1016/j.ces.2026.123587

Yiwei Wu, Xiaohui Wang, Zhenbin Xu, Liyong Bao, Jiaxuan Du, Zehao Liu, Hongyi Yu, Changyu Sun, Guangjin Chen

{"title":"Experimental study on intermittent nitrogen injection to eliminate hydrate blockage","authors":"Yiwei Wu, Xiaohui Wang, Zhenbin Xu, Liyong Bao, Jiaxuan Du, Zehao Liu, Hongyi Yu, Changyu Sun, Guangjin Chen","doi":"10.1016/j.ces.2026.123587","DOIUrl":"10.1016/j.ces.2026.123587","url":null,"abstract":"<div><div>Hydrate blockage is a major challenge to the safe and efficient transportation of oil and gas in the pipelines, and preparing hydrate blockage samples in limited-size experimental equipment is a key research difficulty. To address this issue, this study developed a high-pressure filtration method for producing methane hydrate blockage samples. By discharging unreacted gas–liquid and compressing hydrate particles into chunks under constant pressure yields hydrate blockage samples, enabling laboratory simulation of hydrate blockage removal performance. Nitrogen injection experiments were conducted to examine the effect of injection pressure, injection volume of nitrogen, hydrate blockage temperature, and hydrate decomposition water on the decomposition quantity of hydrate blockage. The experimental results show that when the initial injection volume of N<sub>2</sub> maintain constant, for every 1 MPa increase in nitrogen injection pressure, the amount of methane released from hydrate would decrease by 3.93 × 10<sup>-5</sup> mol/cm<sup>3</sup>. When the injection pressure of N<sub>2</sub> was maintained around 4.20 MPa, for every 1 cm<sup>3</sup> increase in nitrogen injection volume, 0.0011 mol of methane will decompose from the hydrate phase. When the ambient temperature increases from 274.15 to 277.05 K, the amount of methane decomposed from hydrate blockage induced by per unit volume of N<sub>2</sub> rises to 0.00206 mol/cm<sup>3</sup>. The accumulation of hydrate decomposed water would increase mass transfer resistance for methane migration, significantly lowering hydrate decomposition efficiency. When hydrate was fully submerged into the water phase, the dissociation rate of gas hydrate approached to zero, and the hydrate decomposition was completely inhibited.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123587"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

An innovative dual-phase platform for biohydrogen production: Chlorella-based nutrient removal and E. aerogenes fermentation with PEMFC power generation evaluation 一种创新的双相生物制氢平台：基于小球藻的营养物去除和产气大肠杆菌发酵与PEMFC发电的评估

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-03 DOI: 10.1016/j.ces.2026.123491

Ashwin Jacob , Abed Alaswad , B. Ashok , V. Praveen , L. Jino

{"title":"An innovative dual-phase platform for biohydrogen production: Chlorella-based nutrient removal and E. aerogenes fermentation with PEMFC power generation evaluation","authors":"Ashwin Jacob , Abed Alaswad , B. Ashok , V. Praveen , L. Jino","doi":"10.1016/j.ces.2026.123491","DOIUrl":"10.1016/j.ces.2026.123491","url":null,"abstract":"<div><div>This study pioneers the utilization of bakery wastewater (BW) as a cost-effective and sustainable growth medium for Chlorella pyrenoidosa, integrating bioremediation and renewable energy generation through biohydrogen production. Furthermore, the quality of the produced hydrogen is analysed in a proton exchange membrane fuel cell (PEMFC) stack in its raw and purified form. By adopting a dual-phase cultivation approach with native bacteria and C. pyrenoidosa, the process achieved complete BW treatment without dilution or sterilization, delivering nutrient removal efficiencies of 79% for chemical oxygen demand (COD), 94% for nitrogen (TNi), and 80.4% for phosphorus (TPo). Remarkably, the biomass demonstrated a high carbohydrate content (49%) with a productivity rate of 305.8 mg/L/d, underscoring its potential for biohydrogen generation. Subsequent dark fermentation using E. aerogenes and a probe-based pH stabilization protocol at a vol. of 363 mL of hydrogen, achieving a production rate of 59.72 mL/L/h and a yield of 1.5 mol/mol reducing sugars, outperforming established benchmarks. The hydrogen generated was utilized in a PEMFC to assess performance and durability using raw BW-derived hydrogen (BW H<sub>2</sub>) and purified BW-derived hydrogen (PBW H<sub>2</sub>). After 200 cycles, the PEMFC exhibited a performance reduction of 1.3 A/cm<sup>2</sup> with PBW H<sub>2</sub>, while significant degradation was observed with BW H<sub>2</sub> (1.15 A/cm<sup>2</sup> to 0.3 A/cm<sup>2</sup>), primarily due to impurities impacting the membrane and electrode’s active area. This study’s novelty lies in developing an innovative dual-phase cultivation strategy, integrating indigenous wastewater bacteria to enhance nutrient removal and biomass production, offering a novel approach for treating bakery wastewater.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123491"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

On the H-atom abstractions from small fatty acid methyl esters by nitric oxide: An ab initio theoretical kinetic study 一氧化氮对小脂肪酸甲酯中h原子的萃取：从头算理论动力学研究

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-04 DOI: 10.1016/j.ces.2026.123528

Ruirui Kong , Zhiheng Zhu , Ning La , Fashe Li , Hua Wang , Yaozong Duan

{"title":"On the H-atom abstractions from small fatty acid methyl esters by nitric oxide: An ab initio theoretical kinetic study","authors":"Ruirui Kong , Zhiheng Zhu , Ning La , Fashe Li , Hua Wang , Yaozong Duan","doi":"10.1016/j.ces.2026.123528","DOIUrl":"10.1016/j.ces.2026.123528","url":null,"abstract":"<div><div>Small fatty acid methyl esters were selected as simplified surrogate fuels for biodiesel, and high-level quantum chemical calculations were conducted to study the H-abstraction reactions with nitric oxide (NO). The effects of carbon chain length and C=C bond were systematically investigated. The geometry optimization, frequency analysis and 1-dimensional hindered scan of stationary points were performed at the M06-2X/6–311++G(d,p) level of theory, and the single point energies were calculated using CCSD(T)/cc-pVXZ (X = D, T) and MP2/cc-pVYZ (Y = D, T and Q), which were extrapolated to the complete basis set. Rate coefficients were computed in the temperature range of 298 ∼ 2000 K using conventional transition state theory (TST). For the saturated fatty acid methyl esters, the barrier heights follow the order of primary carbon > secondary carbon > tertiary carbon, and the rate coefficients generally increase as the carbon chain length increases. For the unsaturated fatty acid methyl esters, H-abstraction reaction from the allylic carbon site shows the lowest barrier heights. Compared to the saturated counterparts, the barrier heights for abstracting from α<em><sub>p</sub></em> carbon sites are almost comparable (MPa) or much smaller (<em>n</em>-MB), and the rate coefficients from α<em><sub>p</sub></em> carbon site of M2B are consistently higher than those of <em>n</em>-MB. This is deduced the presence of the C=C bond significantly affects the barrier height of the H-abstraction reactions, and thereby influences the relative reactivity of carbon sites. This study helps to gain a deeper understanding of the interaction mechanism between fatty acid methyl esters and NO, and provides theoretical guidance for combustion kinetics models related to fatty acid methyl esters.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123528"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Role of non-newtonian rheology on gas-liquid mass transfer and bubble dynamics in T-junction microchannels 非牛顿流变性对t结微通道气液传质和气泡动力学的影响

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-06 DOI: 10.1016/j.ces.2026.123525

Xingrui Zhou, Lian Duan, Jingru Sun, Dongjie Liu, Wenjun Yuan, Fei Chen

{"title":"Role of non-newtonian rheology on gas-liquid mass transfer and bubble dynamics in T-junction microchannels","authors":"Xingrui Zhou, Lian Duan, Jingru Sun, Dongjie Liu, Wenjun Yuan, Fei Chen","doi":"10.1016/j.ces.2026.123525","DOIUrl":"10.1016/j.ces.2026.123525","url":null,"abstract":"<div><div>Although gas–liquid mass transfer in microchannels has attracted increasing research interest, a comprehensive understanding of how rheological properties influence mass transfer is still lacking. In this study, three-dimensional numerical simulations are performed to investigate oxygen absorption into shear-thinning fluids within a T-junction microchannel. The multiphase mass transfer model employs the Volume-of-Fluid method coupled with a Compressive Continuous Species Transfer formulation, and the rheology behavior is described by the Cross model. The results show that rheological parameters significantly govern various bubble morphologies and hydrodynamics. Specifically, increasing the zero-shear viscosity promotes earlier breakup, whereas increasing the time constant delays breakup. The volumetric mass transfer coefficient <em>k<sub>L</sub>a</em> is modulated by a factor of 3 across the investigated range of rheological parameters. An enhancement of mass transfer is revealed under higher time constant. This is attributed to the intensified interfacial renewal during the bubble formation stage, which compensates for the reduced transport efficiency in the downstream region caused by longer liquid segments and lower bubble velocities. Furthermore, the contribution of mass transfer flux from the bubble formation region decreases with increasing <em>η</em><sub>0</sub> and increases with increasing <em>λ</em>, thereby leading to the dominance of mass transfer in the formation region over a relatively short channel length. Finally, a dimensionless predictive model for <em>k<sub>L</sub>a</em> with a deviation within 20% is established, which captures the effects of flow inertia and rheological properties. These findings provide theoretical guidance for the design and optimization of non-Newtonian microfluidic systems.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123525"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Orthogonal curvilinear coordinates-based high gravity flow-enhanced mass transfer 基于正交曲线坐标的高重力流强化传质

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-04 DOI: 10.1016/j.ces.2026.123517

Yuedi Guo , Menghan Wang , Zhi Qian

{"title":"Orthogonal curvilinear coordinates-based high gravity flow-enhanced mass transfer","authors":"Yuedi Guo , Menghan Wang , Zhi Qian","doi":"10.1016/j.ces.2026.123517","DOIUrl":"10.1016/j.ces.2026.123517","url":null,"abstract":"<div><div>High Gravity (HiGee) technology achieves significant improvement in gas–liquid mass transfer efficiency. Conventionally, HiGee’s high mass transfer efficiency is often attributed to increased interfacial area, without considering the critical role of droplet internal flow, resulting in insufficient exploration of the mass transfer mechanisms in distinct zones. Here, we developed a circulation-oscillation coupled flow field model within droplets to address this gap. By introducing an orthogonal curvilinear coordinate system adapted to the flow field structure, we computed the eddy diffusivity at the boundary (<span><math><mrow><msub><mi>D</mi><mtext>eff</mtext></msub><mo>≈</mo><mn>3.9</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>4</mn></mrow></msup><mi>R</mi><msub><mi>U</mi><mi>∞</mi></msub></mrow></math></span>), which reaches up to an order of magnitude of 10<sup>2</sup> relative to the molecular diffusivity. The average mass transfer coefficient (<span><math><mrow><mover><mrow><mi>k</mi></mrow><mrow><mo>¯</mo></mrow></mover><mo>=</mo><msqrt><mrow><msub><mover><mrow><mi>D</mi></mrow><mrow><mo>¯</mo></mrow></mover><mtext>eff</mtext></msub><mi>S</mi></mrow></msqrt></mrow></math></span>) in the end-effect zone is approximately three times higher than that in the bulk packing zone, demonstrating the intrinsic differences in mass transfer dynamics between the two zones. Experimental results show that the end-effect zone contributes approximately 50% to the total mass transfer, with model accuracy for the volumetric mass transfer coefficient exceeding 85% in this zone.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123517"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Simulation and experimental study on the flow field, temperature distribution, and dynamic accumulation behavior of bottom dross in a hot-dip galvanizing bath 热镀锌槽底渣流场、温度分布及动态积累行为的模拟与实验研究

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-03 DOI: 10.1016/j.ces.2026.123514

Hongzhu Fei , Nannan Zhao

{"title":"Simulation and experimental study on the flow field, temperature distribution, and dynamic accumulation behavior of bottom dross in a hot-dip galvanizing bath","authors":"Hongzhu Fei , Nannan Zhao","doi":"10.1016/j.ces.2026.123514","DOIUrl":"10.1016/j.ces.2026.123514","url":null,"abstract":"<div><div>In the continuous hot-dip galvanization process, zinc dross defects are a key factor affecting the surface quality of galvanized steel sheets, and their formation is related to the operating parameters of the galvanizing bath. In this study, industrial-scale CFD single-phase flow numerical simulations and physical simulation experiments are employed to investigate the effects of steel strip width and speed on the flow field characteristics, temperature distribution of molten zinc, and dynamic accumulation behavior of bottom dross. The results show that the first impact flow drivers the high-temperature molten zinc ejected from the front inductor downward toward the bottom of the galvanizing pot, while the second impact flow transports the low-temperature molten zinc, generated during ingot melting along the pot bottom toward the front wall. As the width of the steel strip decreases, the intensity of the first impact flow weakens, while that of the second impact flow strengthens. Consequently, the low-temperature zones in the molten zinc expand, potentially promoting increased dross formation. Although the steel strip speed does not significantly alter the overall flow field characteristics of the molten zinc, it substantially reduces the amount of suspended dross. Furthermore, the associated reduction in the heat exchange rate lowers the temperature of the molten zinc near the bottom of the zinc pot.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123514"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Experimental investigation on CO2 hydrate formation and growth in a liquid CO2 droplet system for hydrate-based CO2 sequestration 液滴固碳系统中CO2水合物形成与生长的实验研究

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-06 DOI: 10.1016/j.ces.2026.123550

Xingxun Li , Longyan Gao , Shuang Liang , Xuesong Li , Guangjin Chen , Changyu Sun

{"title":"Experimental investigation on CO2 hydrate formation and growth in a liquid CO2 droplet system for hydrate-based CO2 sequestration","authors":"Xingxun Li , Longyan Gao , Shuang Liang , Xuesong Li , Guangjin Chen , Changyu Sun","doi":"10.1016/j.ces.2026.123550","DOIUrl":"10.1016/j.ces.2026.123550","url":null,"abstract":"<div><div>The hydrate-based CO<sub>2</sub> sequestration has been considered as an effective approach for the long-term carbon storage. When liquid CO<sub>2</sub> is injected into the seabed, it could be sheared into CO<sub>2</sub> droplets. However, existed studies on the CO<sub>2</sub> hydrate formation and growth in the liquid CO<sub>2</sub> droplet system have been lacking. This study focuses on the investigations of morphological evolution processes of the CO<sub>2</sub> hydrate formation and growth kinetics in the liquid CO<sub>2</sub> droplet system. The effects of temperature, pressure, CO<sub>2</sub> saturation and addition of SDS in the surrounding water phase on the evolution of liquid CO<sub>2</sub> hydrate growth process were investigated. The morphological results indicate three liquid CO<sub>2</sub> hydrate growth stages for a single liquid CO<sub>2</sub> droplet located on a platform, namely, the lateral growth of hydrate film on the surface of liquid CO<sub>2</sub> droplet, the growth of hydrate film at the contact edge between the CO<sub>2</sub> droplet and platform and the vertical fibrous hydrate growth in the form of columnar pattern. The higher CO<sub>2</sub> saturation in the surrounding water, higher pressure and lower temperature can contribute to the faster lateral growth kinetics and smoother hydrate film surface. It was confirmed that the formed hydrates cannot exist stably, gradually dissolving into the surrounding water when the driving force for hydrate formation was low. The addition of SDS in the surrounding water could alter the shape of hydrate-coated CO<sub>2</sub> droplet and remarkably promoted the formation of CO<sub>2</sub> hydrates, resulting in the significant vertical fiber-like hydrate growth phenomena.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123550"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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