Chemical Engineering and Processing - Process Intensification最新文献

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Optimization of antimicrobial properties of essential oils under rotating magnetic field 优化旋转磁场下精油的抗菌特性

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110041

Agata Markowska-Szczupak , Oliwia Paszkiewicz , Aneta Wesołowska , Marian Kordas , Rafał Rakoczy

Essential oils (EOs) extracted from Thymus vulgaris L. (TEO) and Rosmarinus officinalis L. (REO) have aroused interest in their application to food preservation or in alternative medicine or aroma-therapy. In this study, the chemical compositions of essential oils were determined and analyzed. The purpose of the investigation was to investigate in detail the activity of essential oils extracted from herbs (thyme and rosemary) and exposed to rotating magnetic filed (RMF) against the model Gram-negative bacteria Escherichia coli The bacterial removal has been optimized by a surface response methodology (RSM). It was shown that TEO in a concentration of 10 µL/50 mL of water resulted in a total bacterial number reduction after 40 min under the RMF. Rosemary's antibacterial effect was much weaker. Thus, we summarized that the rotating magnetic fields at a frequency of 27 Hz can increase the antimicrobial efficiency but the effect depends on the type of essential oil. High-rate bacteria removal was obtain for thyme oil in concentration of 30 µL of thyme oil to 50 mL of bacterial suspension, exposed to RMF at a frequency of 27 Hz for 40–60 min.

从百里香（Thymus vulgaris L.，TEO）和麝香草（Rosmarinus officinalis L.，REO）中提取的精油（EOs）在食品保鲜、替代药物或芳香疗法中的应用引起了人们的兴趣。本研究对精油的化学成分进行了测定和分析。调查的目的是详细研究从香草（百里香和迷迭香）中提取并暴露在旋转磁场（RMF）中的精油对模式革兰氏阴性菌大肠杆菌的活性。结果表明，在 RMF 下 40 分钟后，浓度为 10 µL/50 mL 水的 TEO 可使细菌总数减少。迷迭香的抗菌效果要弱得多。因此，我们总结出频率为 27 赫兹的旋转磁场可以提高抗菌效率，但效果取决于精油的种类。将 30 µL 的百里香精油加入 50 mL 的细菌悬浮液中，暴露在频率为 27 Hz 的 RMF 中 40-60 分钟，百里香精油的细菌去除率很高。

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引用次数: 0

Cell/particle manipulation using Bulk Acoustic Waves (BAWs) on centrifugal microfluidic platforms: A mathematical study 在离心微流体平台上使用体声波 (BAW) 操纵细胞/粒子：数学研究

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110024

Soroush Zaheri-Ghannad , Vahid Kordzadeh-Kermani , Masoud Madadelahi

This study presents an integrated acoustic-aided centrifugal microfluidic system to focus and separate microparticles. A 3D numerical simulation was conducted to analyze microparticle movement by exploiting the simultaneous imposition of centrifugal forces and bulk acoustic waves (BAWs) on an electrified lab-on-a-disc device (eLOD). Accordingly, the movement of microparticles was analyzed in a radially positioned rectangular microchannel at various rotation speeds. The effect of physical parameters, including the distance of the microchannel to the center/radius, tilting angle (α), the oscillation amplitude of BAWs, the microchannel's dimension, and the particles’ diameter on particle trajectories and focusing efficiency, was studied. It was found that properly adjusting the microchannel's placement at α = 30° made it possible to direct the focused stream of microparticles toward the desired outlet. Higher values of applied oscillation amplitude of BAWs (0.3 nm) led to perfect focusing of microparticles toward the middle outlet in a 200-µm width microchannel at 80 rad/s rotation. Furthermore, the system's ability to separate the circulating tumor cells (CTC) from white blood cells (WBC) was also simulated. The results showed that a successful size-based separation of these bioparticles is achievable by adequately adjusting the microchannel's position or tilting angle at 286 rpm.

本研究介绍了一种用于聚焦和分离微颗粒的集成声学辅助离心微流控系统。利用离心力和体声（BAWs）同时作用于电动盘上实验室装置（eLOD）的原理，进行了三维数值模拟，分析了微颗粒的运动。因此，我们分析了微颗粒在径向定位的矩形微通道中以不同转速的运动情况。研究了微通道到中心/半径的距离、倾斜角 (α)、超声波振荡幅度、微通道尺寸和粒子直径等物理参数对粒子轨迹和聚焦效率的影响。研究发现，在 α = 30° 时适当调整微通道的位置，可以将聚焦的微颗粒流引向所需的出口。BAW 的振荡幅度越大（0.3 nm），微颗粒就能在 200 微米宽的微通道中以 80 拉德/秒的旋转速度完美地聚焦到中间出口。此外，还模拟了该系统从白细胞中分离循环肿瘤细胞（CTC）的能力。结果表明，只要在 286 转/分的转速下适当调整微通道的位置或倾斜角度，就能成功分离这些生物颗粒。

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引用次数: 0

An Interview with Francesca Paradisi 采访弗朗西斯卡-帕拉迪西

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.109914

Francesca Paradisi

引用次数: 0

An Interview with Sharon Velasquez-Orta 采访莎伦-贝拉斯克斯-奥尔塔

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.109915

Enrique A. López-Guajardo

引用次数: 0

Numerical and experimental investigation of Tesla micromixers with different three-dimensional herringbone structures 具有不同三维人字形结构的特斯拉微搅拌器的数值和实验研究

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110040

Duo Sun , Lin Zeng , Yi Yang , Chao Liu , Jiaju Hong , Wenbo Han , Wei Li , Chenyong Wang , Jienan Shen , Hui Yang , Hongpeng Zhang

Laminar flow within channels at the micro- or nano-scale of the microfluidic device restricts the rapid mixing of different fluids, leading to reduced reaction velocity. In this study, different three-dimensional herringbone structures were designed to the Tesla micromixers to enhance transverse flow and vortex flow in the channels. Computational fluid dynamics (CFD) simulation results indicated that the sunken herringbone structure provided the most significant enhancement in mixing. The raised herringbone structure exhibited the best energy performance. When Reynolds number (Re) exceeded 60, the mixing indexes (MI) of the Tesla micromixers were over 90%. The improvement in mixing efficiency by both herringbone structures compensated for the weak mixing performance of the Tesla structure at lower Reynolds numbers (Re=0.2–30). Additionally, the mixing experimental results verified the accuracy of the simulation results. This study could provide guidance for improving the mixing performance of micromixers over a wide range of Reynolds numbers (Re=0–100).

微流控装置微米或纳米尺度通道内的层流限制了不同流体的快速混合，导致反应速度降低。本研究为特斯拉微搅拌器设计了不同的三维人字形结构，以增强通道内的横向流动和涡流。计算流体动力学（CFD）模拟结果表明，下沉式人字形结构的混合效果最显著。凸起的人字形结构表现出最佳的能量性能。当雷诺数（Re）超过 60 时，特斯拉微搅拌器的混合指数（MI）超过 90%。两种人字形结构混合效率的提高弥补了特斯拉结构在较低雷诺数（Re=0.2-30）下混合性能较弱的缺点。此外，混合实验结果验证了模拟结果的准确性。这项研究可为在较宽的雷诺数（Re=0-100）范围内改善微搅拌器的搅拌性能提供指导。

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引用次数: 0

An Interview with Professor Prof. You Han 尤涵教授访谈

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.109947

You Han

引用次数: 0

An Interview with Assistant Professor Weerinda Mens 专访韦林达-门斯助理教授

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.109908

Weerinda Mens

引用次数: 0

An Interview with Prof. Lan Xingying 专访兰兴英教授

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.109911

Enrique A. López-Guajardo

引用次数: 0

Parametric design of curved hydrocyclone using data points and its separation enhancement mechanism 使用数据点的曲面水力旋流器参数化设计及其分离强化机制

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.110043

Xiaoyan Liu , Jian-gang Wang , Hualin Wang , Yanhong Zhang , Yan Zheng , Mochuan Sun , Yinghao Yang , Yuru Mei , Yafei Zhang

Based on parametric design of curves using data points, two novel hydrocyclones were designed: Spline-Curved-Cone hydrocyclone (H2) and Expassoc-Curved-Cone hydrocyclone (H3). These designs are improvements on the traditional biconical hydrocyclone (H1). Numerical simulations and experimental validation by PIV measurement were used to investigate the effects of cone section profiles on the flow characteristics and separation efficiency. The results showed both H2 and H3 achieved higher separation efficiency than H1. Specifically, the highest efficiency of H3 increased by 24.71 %, and that of H2 increased by 16.22 % compared with H1. It was also found the curved design of cone section profile directly affects the tangential velocity distribution and pressure distribution of the flow field inside hydrocyclones. H3 exhibited better flow field stability and highest separation efficiency due to its optimized cone section space and flow structure. This study provides scientific basis and data support for the optimization and industrial application of the cylinder-on-cone hydrocyclones.

根据使用数据点的曲线参数设计，设计了两种新型水力旋流器：Spline-Curved-Cone 水力旋流器 (H2) 和 Expassoc-Curved-Cone 水力旋流器 (H3)。这些设计是对传统双锥水力旋流器（H1）的改进。通过数值模拟和 PIV 测量进行实验验证，研究了锥体截面对流动特性和分离效率的影响。结果表明，H2 和 H3 的分离效率均高于 H1。具体来说，与 H1 相比，H3 的最高效率提高了 24.71%，H2 提高了 16.22%。研究还发现，锥形截面的曲线设计直接影响水力旋流器内部流场的切向速度分布和压力分布。由于优化了锥体截面空间和流动结构，H3 表现出更好的流场稳定性和最高的分离效率。这项研究为圆筒-圆锥水力旋流器的优化和工业应用提供了科学依据和数据支持。

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引用次数: 0

An Interview with Prof. Panagiota Angeli 专访 Panagiota Angeli 教授

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2024-11-01 DOI: 10.1016/j.cep.2024.109910

Enrique A. López-Guajardo

引用次数: 0

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