Chemical Engineering Science最新文献_第6页

Experimental analysis of time resolved three-dimensional velocity and vorticity fields behind single rising bubbles using Lagrangian particle tracking velocimetry 拉格朗日粒子跟踪测速法对单个上升气泡后三维速度场和涡度场的时间分辨实验分析

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-01-29 DOI: 10.1016/j.ces.2026.123403

A.v. Kameke , R. Uphoff , E. Steuwe , J.H. Nissen , M. Hoffmann , M. Schlüter , F. Kexel

引用次数: 0

Design and simulation of a valveless piezoelectric micropump for micro cooling system 微冷却系统无阀压电微泵的设计与仿真

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-11 DOI: 10.1016/j.ces.2026.123572

Wen Zeng , Mengyao Liu , Bohang Wang , Wenbo Luo , Hao Qin , Junwei Zhou , Yang He , Airong Qian , Min Zhang

引用次数: 0

Mechanistic insights into nonmonotonic dependence of proton transport on confined channel size 质子输运对受限通道大小非单调依赖性的机理研究

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-07 DOI: 10.1016/j.ces.2026.123536

Wangqin Ruan , Fang Xu , Kang Huang , Zhi Xu

{"title":"Mechanistic insights into nonmonotonic dependence of proton transport on confined channel size","authors":"Wangqin Ruan , Fang Xu , Kang Huang , Zhi Xu","doi":"10.1016/j.ces.2026.123536","DOIUrl":"10.1016/j.ces.2026.123536","url":null,"abstract":"<div><div>Channel size is crucial parameter for proton transport through confined channels, yet its specific influence is still controversial due to the lack of mechanistic in-depth understandings. Here, using molecular dynamics simulations with reactive force fields, we demonstrate that a nonmonotonic dependence of proton conductivity on channel size. In particular, proton conductivity exhibits an inverse relationship with channel size at the sub-nanometer scale, which stands in sharp contrast to the long-standing hypothesis. This unusual observation originates from reverse variations in (i) the dissociation degree of pore-wall groups, as regulated by the orientation of water molecules, which in turn determines intra-pore proton concentrations, and (ii) the effective length of hydrogen-bond chains, which influences efficiency of Grotthuss proton transport. Both effects fundamentally arise from the comparable size of protons relative to sub-nanometer channels. The novel mechanistic insights revealed in this study could provide valuable guidelines for the rational design of high-performance proton channels.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123536"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172321","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

Dynamic behavior and acoustic characteristics of liquid phase bubble breakup 液相气泡破碎的动力学行为和声学特性

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-05 DOI: 10.1016/j.ces.2026.123515

Zhixi Zhang , Shuling Zhang , Peng Guo , Shilong Shen , Bingjun Gao , Weiyi Su , Yuqi Hu , Xiong Yu , Guangyan Wang , Honghai Wang

{"title":"Dynamic behavior and acoustic characteristics of liquid phase bubble breakup","authors":"Zhixi Zhang , Shuling Zhang , Peng Guo , Shilong Shen , Bingjun Gao , Weiyi Su , Yuqi Hu , Xiong Yu , Guangyan Wang , Honghai Wang","doi":"10.1016/j.ces.2026.123515","DOIUrl":"10.1016/j.ces.2026.123515","url":null,"abstract":"<div><div>Gas-liquid two-phase flows are common in engineering and nature, and bubble breakup in liquids affects mass/energy transfer and emits acoustic signals. Establishing a correlative relationship between bubble dynamic behavior and acoustic characteristics is crucial for passive acoustic monitoring. This study investigates the dynamic behavior and acoustic characteristics of bubble breakup processes in turbulent flows by combining experimental observations and numerical simulations. Three breakup types are identified: tensile breakup (driven by inertial forces and surface tension, producing large daughter bubbles with low-frequency acoustic signals below 2 kHz), shear breakup (dominated by viscous shear and turbulent eddies, generating small daughter bubbles with high-frequency signals ∼ 5 kHz), and instability breakup (a combination of tensile and shear effects, yielding broadband acoustic signatures). The <em>Bu</em> number is proposed to quantify the coupling between dynamic behavior and acoustic frequency, with tensile breakup (<em>Bu</em> ≤ 1) and shear breakup (1 < <em>Bu</em> ≤ 20) showing distinct distributions, while the instability breakup represents the transitional state between the two types. This correlation not only elucidates the underlying physical mechanisms of multiphase flows but also provides a non-invasive monitoring strategy for optimizing multiphase flow processes in chemical engineering.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123515"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172411","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

In situ bismuth electrodeposition accelerates V3+/V2+ kinetics in mixed-acid VRFB electrolytes 原位铋电沉积加速了混合酸VRFB电解质中的V3+/V2+动力学

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.2026.123567

Miao Qin, Tao Liu, Yimin Zhang, Hong Liu, Ling Ge

{"title":"In situ bismuth electrodeposition accelerates V3+/V2+ kinetics in mixed-acid VRFB electrolytes","authors":"Miao Qin, Tao Liu, Yimin Zhang, Hong Liu, Ling Ge","doi":"10.1016/j.ces.2026.123567","DOIUrl":"10.1016/j.ces.2026.123567","url":null,"abstract":"<div><div>H<sub>2</sub>SO<sub>4</sub>-HCl mixed-acid vanadium electrolytes broaden the operating window and allow higher vanadium concentrations, yet the negative V<sup>3+</sup>/V<sup>2+</sup> reaction can remain kinetically sluggish and impose substantial polarization. Here, a small amount of BiCl<sub>3</sub> is introduced directly into the mixed-acid negative electrolyte so that metallic bismuth forms and deposits in situ on graphite felt during cell operation, without electrode pretreatment. UV–vis spectra show that adding BiCl<sub>3</sub> does not measurably change the characteristic V<sup>3+</sup> absorption features, indicating that the bulk vanadium speciation remains unchanged. After charging, plate-like Bi<sup>0</sup> deposits are observed on the carbon fibers, and the V<sup>3+</sup>/V<sup>2+</sup> redox reaction is clearly accelerated. Electrochemical measurements show that 0.02 mol·L<sup>−1</sup> Bi<sup>3+</sup> is most effective. The redox peak separation decreases from 535.19 mV to 212.35 mV, and the charge-transfer resistance is substantially reduced. The exchange current density increases from 0.195 mA·cm<sup>−2</sup> to 0.324 mA·cm<sup>−2</sup>, and the standard rate constant increases from 2.021 × 10<sup>−9</sup> cm·s<sup>−1</sup> to 3.358 × 10<sup>−9</sup> cm·s<sup>−1</sup>. By comparison, the double-layer capacitance increases only from 0.572 mF·cm<sup>−2</sup> to 0.641 mF·cm<sup>−2</sup>, suggesting that the gain mainly comes from faster interfacial charge transfer rather than a simple increase in electrochemically accessible area. In single-cell tests from 40 to 160 mA·cm<sup>−2</sup>, the Bi-containing electrolyte shows lower polarization and improved voltage and energy efficiencies.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123567"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172412","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 miniaturised ribbed-rotor Taylor-vortex reactor for low-cost continuous flow enzymatic process development: design, manufacturing, CFD modelling and application in L-m-tyrosine decarboxylation 用于低成本连续流酶过程开发的小型肋转子泰勒涡反应器：设计、制造、CFD建模及其在l -m-酪氨酸脱羧中的应用

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-01-23 DOI: 10.1016/j.ces.2026.123432

Georgios Gkogkos , Yu Wang , Helen C. Hailes , Gary J. Lye , Asterios Gavriilidis

{"title":"A miniaturised ribbed-rotor Taylor-vortex reactor for low-cost continuous flow enzymatic process development: design, manufacturing, CFD modelling and application in L-m-tyrosine decarboxylation","authors":"Georgios Gkogkos , Yu Wang , Helen C. Hailes , Gary J. Lye , Asterios Gavriilidis","doi":"10.1016/j.ces.2026.123432","DOIUrl":"10.1016/j.ces.2026.123432","url":null,"abstract":"<div><div>This work presents the development of a miniaturised Taylor-vortex reactor (mTVR), with volume 2 ml and a sub-mm distance between the rotor and the stator, designed to be easily and cost-effectively manufactured and implemented in enzymatic process development. The rotor contains radial ribs in order to reduce backmixing. A CFD model was used to qualitatively predict hydrodynamic transitions taking place in the annular rib gap, while varying the rotor speed and the volumetric flowrate. A physical prototype was manufactured using 3D printed parts. Macromixing in the 3D printed device was assessed experimentally by residence time distribution (RTD) studies. The mTVR RTD was equivalent to 4–13 CSTRs in series over a wide range of operational conditions, including at low flowrates (space time of > 30 min) where backmixing is often hard to suppress. The effect of operating parameters on experimental RTD curves was correlated with the corresponding simulations. Specifically, the formation of secondary Taylor vortices (in the rib gaps) was shown to affect backmixing. The mTVR was used to produce <em>meta</em>-tyramine via the biocatalytic transformation of <em>meta</em>-tyrosine using tyrosine decarboxylase from <em>Enterococcus faecalis</em> (EfTyrDC). Various operating conditions were investigated using only 0.6 ml of enzyme solution per experimental run. Overall, this work demonstrates the suitability of the mTVR for evaluating the performance of continuous bioconversions using minimal quantities of enzyme and substrate.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123432"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146043132","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 protic ionic liquid with dinuclear copper ion efficiently catalyzes chemoselective alkoxycarbonylation of alkanes and alcohols 一种具有双核铜离子的质子离子液体可有效催化烷烃和醇的化学选择性烷氧羰基化反应

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.2026.123524

Yumei Liu , Deshuai Yang , Zhen Yang , Kexin Li , Ruirui Zhang , Ruirui Wang , Min Ji , Ruixia Liu

{"title":"A protic ionic liquid with dinuclear copper ion efficiently catalyzes chemoselective alkoxycarbonylation of alkanes and alcohols","authors":"Yumei Liu , Deshuai Yang , Zhen Yang , Kexin Li , Ruirui Zhang , Ruirui Wang , Min Ji , Ruixia Liu","doi":"10.1016/j.ces.2026.123524","DOIUrl":"10.1016/j.ces.2026.123524","url":null,"abstract":"<div><div>Alkoxycarbonylation of alkanes and alcohols with CO offers a promising avenue for synthesizing carbonyl derivatives. However, strong metal-CO coordination leads to metal poisoning and the high bond dissociation energy of alkyl C-H bonds requires strong oxidants for activation, which can undesirably oxidize alcohols. Therefore, effective regulation of metal charge density while preserving alcohol nucleophilicity is crucial. Herein, we have developed a protic dinuclear copper-based ([Cu<sub>2</sub>(Eim)<sub>2</sub>Cl<sub>4</sub>]<sup>2-</sup>) ionic liquid, which can efficiently catalyze the alkoxycarbonylation of alkyls and alcohols and the yield can be up to 96%, which is the highest TOF till now. The superior efficiency is due to the lower copper charge density into its [Cu<sub>2</sub>(Eim)<sub>2</sub>Cl<sub>4</sub>]<sup>2-</sup>, which promotes CO coordination and insertion, and hydrogen bonding interactions facilitate the nucleophilicity of alcohols. Given its generality and efficiency, this catalytic system offers a practical synthetic approach for converting a diverse array of alcohols into versatile ester products.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123524"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116081","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

Robust CVD polymer encapsulation for thermally and chemically resistant fluorescent sensor nanoprobes 坚固的CVD聚合物封装，用于耐热和耐化学腐蚀的荧光传感器纳米探针

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.2026.123554

Merve Karabıyık, Gizem Cihanoğlu, Özgenç Ebil

{"title":"Robust CVD polymer encapsulation for thermally and chemically resistant fluorescent sensor nanoprobes","authors":"Merve Karabıyık, Gizem Cihanoğlu, Özgenç Ebil","doi":"10.1016/j.ces.2026.123554","DOIUrl":"10.1016/j.ces.2026.123554","url":null,"abstract":"<div><div>Semiconductor quantum dots (QDs) are attractive fluorophores for sensor applications due to their narrow emission bandwidths and high photostability; however, their performance is often limited by insufficient chemical and thermal durability under operating conditions. In this study, a solvent-free encapsulation strategy based on initiated chemical vapor deposition (iCVD) is proposed to enhance the stability of QD-based sensor nanoprobes. Cross-linked poly (glycidyl methacrylate-co-ethylene glycol dimethacrylate) (ECOP) thin films were conformally deposited as encapsulation layers onto CdTe QD-functionalized poly(GMA) sensor surfaces. The encapsulated nanoprobes were evaluated under chemically aggressive environments (water, salt water, toluene, and sulfuric acid) and elevated temperatures. Following exposure to aggressive solvents, both the polymer film thickness variation and QD fluorescence intensity change remained below 10 %, confirming the robustness of the cross-linked network. Also, thermal durability tests showed stable fluorescence performance after annealing at 250 °C, with structural and optical changes remaining within the accepted 10 % threshold. The results demonstrate that coatings deposited using iCVD exhibit conformal coverage and enhanced stability. This enables reliable protection of QD-based sensor nanoprobes without compromising optical performance. This study presents a promising method to extend the operational lifetime and environmental durability of QD-integrated sensor platforms by using chemically and thermally stable polymer encapsulation.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123554"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135361","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 ANN-based fluid particle breakage model for accelerating PBM simulation 基于人工神经网络的流体颗粒破碎模型加速PBM仿真

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.2026.123513

Shenggao Gong , Chaoqun Yao , Ningning Gao

引用次数: 0

Continuous oscillatory NETmix reactor: A new operating mode of an oscillatory static mixer for continuous operation 连续振荡式NETmix反应器：一种连续运行的振荡式静态混合器的新运行方式

IF 4.3 2区工程技术

Chemical Engineering Science Pub Date : 2026-05-15 Epub Date: 2026-02-07 DOI: 10.1016/j.ces.2026.123544

Sofia P. Brandão , Isabel S. Fernandes , Yaidelin A. Manrique , Madalena M. Dias , Ricardo J. Santos , Margarida S.C.A. Brito , José C.B. Lopes

{"title":"Continuous oscillatory NETmix reactor: A new operating mode of an oscillatory static mixer for continuous operation","authors":"Sofia P. Brandão , Isabel S. Fernandes , Yaidelin A. Manrique , Madalena M. Dias , Ricardo J. Santos , Margarida S.C.A. Brito , José C.B. Lopes","doi":"10.1016/j.ces.2026.123544","DOIUrl":"10.1016/j.ces.2026.123544","url":null,"abstract":"<div><div>This work presents an enhanced oscillatory NETmix (O-NETmix) system, highlighting how coupling the NETmix geometry with oscillatory flow technology can further improve mixing performance. While O-NETmix has previously been studied under batch operation, this study focuses on its continuous operation, demonstrating the potential for more efficient and effective mixing. Enhancing mixing through oscillatory flow is a key factor for increasing process performance and productivity. An oscillatory flow was superimposed over the net flow in the NETmix reactor to achieve chaotic mixing at Reynolds numbers below the critical value. CFD simulations were conducted to examine the effect of phase displacement, amplitude, frequency, and velocity of the inlet streams on mixing. Numerical results were validated through tracer experiments. Results show that an out-of-phase strategy and higher oscillation amplitudes enhance mixing performance along the reactor. This behaviour revealed a lateral mixing mechanism distinct from the longitudinal mixing previously observed in batch operation. A specific frequency range was identified over which effective mixing occurs, while frequencies outside this range lead to diminished flow dynamics or species segregation. Overall, applying an oscillatory external stimulus is a promising solution to the onset of mixing in the continuous operation of O-NETmix at low net Reynolds numbers.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"326 ","pages":"Article 123544"},"PeriodicalIF":4.3,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135436","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