Journal of the Taiwan Institute of Chemical Engineers最新文献_第2页

Urchin-like Fe2O3/MXene Ti3C2Tx compounds for enhancement of NH3 sensitive property at low temperature 类海胆Fe2O3/MXene Ti3C2Tx化合物对NH3低温敏感性能的增强

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-08 DOI: 10.1016/j.jtice.2025.106609

Ming HOU , Guoxin JIANG , Shenghui GUO , Xiaolei YE , Li YANG

Background

NH₃ is widely used in the key fields such as chemical industry, medical treatment and so on. However, the long-term inhalation of NH₃ could cause asthma exacerbation, rhinitis and other diseases to human health. The advanced semiconductor gas sensor can realize the detection of NH₃, while their high working temperature causes high energy consumption, which will limit practical applications. Developing the NH₃ sensitive materials with low operating temperature, high sensitivity remains a priority.

Methods

This study presents a low-temperature gas sensor based on few layer 2D MXene-Fe₂O₃ composite prepared by dual temperature freeze drying technology. The sensitivity towards NH₃ was improved using a composition strategy. The working temperature, sensing properties, stability, selectivity and gas sensing mechanism were systematically studied.

Significant findings

Urchin-like Fe₂O₃ distributes on the porous Ti₃C₂T_x. Ti₃C₂T_x-Fe₂O₃ composite shown excellent gas sensitive performances at 100 °C to 100 ppm NH₃ with a proportion of 56.2%, which is higher twice and 3.2 times than that of raw Fe₂O₃ and Ti₃C₂T_x. The enhancement of gas sensitive properties is attributed to the fact that the surface of Ti₃C₂T_x is porous after bidirectional freeze-drying technology and the construction of energy level structure between Ti₃C₂T_x and Fe₂O₃, which improve the specific surface area of the material, thus providing more active sites for gas sensing reaction and ameliorating the gas sensitive properties of the material.

nh3广泛应用于化工、医疗等关键领域。然而，长期吸入NH3会对人体健康造成哮喘加重、鼻炎等疾病。先进的半导体气体传感器可以实现对NH3的检测，但其工作温度高，能耗高，限制了实际应用。开发低工作温度、高灵敏度的氨敏感材料仍是当务之急。方法采用双温冷冻干燥技术制备了一种基于多层二维MXene-Fe2O3复合材料的低温气体传感器。采用复合策略提高了对NH3的敏感性。系统地研究了该材料的工作温度、传感性能、稳定性、选择性和气敏机理。在多孔Ti3C2Tx上发现了surchin -类Fe2O3。Ti3C2Tx-Fe2O3复合材料在100℃~ 100 ppm NH3条件下表现出优异的气敏性能，掺量为56.2%，分别是原Fe2O3和Ti3C2Tx的2倍和3.2倍。气敏性能的增强主要是由于Ti3C2Tx经过双向冻干工艺后表面多孔，以及Ti3C2Tx与Fe2O3之间的能级结构的构建，提高了材料的比表面积，从而为气敏反应提供了更多的活性位点，改善了材料的气敏性能。

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引用次数: 0

Novel hybrid reactive extractive distillation processes design for efficient methyl ethyl carbonate synthesis 新型混合反应萃取精馏工艺设计用于高效合成碳酸乙基甲酯

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-07 DOI: 10.1016/j.jtice.2025.106611

Xiaoran Li, Ning Li, Yanlei Zhu, Yong Liu, Rui Wang

Background

Ethyl methyl carbonate (EMC) is a high-value-added green chemical with prominent advantages in lithium battery electrolytes. The presence of multiple azeotropes in the reactive distillation of dimethyl carbonate and methanol severely limits reaction conversion and selectivity while complicating the separation process. Reactive extractive distillation effectively addresses the azeotrope limitations of conventional reactive distillation by introducing an extractant, thereby enhancing both reaction and separation efficiency.

Methods

This study proposes novel hybrid reactive extractive distillation processes for efficient EMC synthesis. Through molecular simulations and thermodynamic analysis, this study identified diethyl carbonate as the optimal extractant, demonstrating its effectiveness in enhancing both the physical separation and chemical reaction processes. The reactive extractive distillation column was developed, achieving 85 % single-pass DMC conversion rate and 100 % EMC selectivity. The reactive extractive distillation and the reactive extractive distillation coupling dividing wall distillation processes were proposed, optimized, and evaluated.

Significant findings

The reactive extractive distillation coupling dividing wall distillation process offers transformative TAC reduction, but at the expense of higher exergy losses. Specifically, the reactive extractive distillation process at TAC of 5.14 × 10^7 $/year, CO₂ emissions of 4.67 kg/s, and the total exergy destruction of 1.52 × 10^4 kW, while the reactive extractive distillation coupling dividing wall distillation process reduces TAC to 2.37 × 10^7 $/year, with CO₂ emissions of 4.95 kg/s, and total exergy destruction of 2.05 × 10^4 kW. This study provides fundamental research support for the development and industrial application of an efficient EMC synthesis process.

碳酸甲酯（EMC）是一种高附加值的绿色化学品，在锂电池电解质中具有突出的优势。在碳酸二甲酯和甲醇的反应精馏中，多种共沸物的存在严重限制了反应的转化率和选择性，同时使分离过程复杂化。反应萃取精馏通过引入萃取剂有效地解决了传统反应精馏的共沸限制，从而提高了反应和分离效率。方法提出了一种新的混合反应萃取精馏工艺，用于高效合成电磁兼容化合物。通过分子模拟和热力学分析，本研究确定了碳酸二乙酯为最佳萃取剂，证明了其在提高物理分离和化学反应过程中的有效性。研制了反应萃取精馏塔，实现了85%的DMC单次转化率和100%的EMC选择性。提出了反应萃取精馏和反应萃取精馏耦合分壁精馏工艺，并对其进行了优化和评价。重要发现反应萃取精馏耦合分壁精馏工艺提供了变革性的TAC降低，但以较高的火用损失为代价。其中，反应性萃取精馏工艺TAC为5.14 × 10^7 $/年，CO₂排放量为4.67 kg/s，总火用破坏为1.52 × 10^4 kW，而反应性萃取精馏耦合分壁蒸馏工艺TAC为2.37 × 10^7 $/年，CO₂排放量为4.95 kg/s，总火用破坏为2.05 × 10^4 kW。本研究为高效电磁兼容合成工艺的开发和工业应用提供了基础研究支持。

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引用次数: 0

Hierarchical nanomaterials based on clay-metal silicate coupling strategy for highly efficient removal of aflatoxin B1 基于粘土-金属硅酸盐偶联的分级纳米材料高效去除黄曲霉毒素B1

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-06 DOI: 10.1016/j.jtice.2025.106607

Guangyan Tian , Zhongdan Shi , Rongyu Xiang , Han Lu , Yan Li , Xiaoyan Li

Background

Mycotoxins, such as aflatoxin B₁ (AFB₁), are highly toxic water contaminants that pose serious risks to ecosystems and human health. Conventional adsorbents are often limited by their simple structure and insufficient active sites, resulting in inefficient removal.

Methods

Hierarchically nanostructured adsorbents were synthesized via a hydrothermal approach using a clay mineral–metal silicate coupling strategy. Palygorskite (Pal) and montmorillonite (Mmt) were used as templates to release Si–OH groups, enabling the in-situ growth of magnesium silicate nanosheets. This process yielded composite architectures combining original clay nanostructures with secondary silicate nanochannels. The materials were thoroughly characterized, and adsorption mechanisms were investigated using FT-IR and XPS.

Significant Findings

The Pal-derived adsorbent (NRSN) featured one-dimensional (1D) nanorods with secondary nanosheets, while the Mmt-derived adsorbent (NCSN) showed two-dimensional (2D) nanosheets with secondary nanostructures. Both materials exhibited high specific surface areas and abundant active sites (Si–O–Mg, Mg–OH, Si–OH). They demonstrated exceptional AFB₁ adsorption capacities, with NRSN reaching 19.40 mg/g and NCSN achieving 24.99 mg/g. The adsorption was governed primarily by electron donor–acceptor interactions and hydrogen bonding.

The application prospects

This research is expected to provide new material design principles for efficient removal of highly toxic and environmentally persistent pollutants while offering fresh perspectives for high-value utilization of clay minerals.

黄曲霉毒素B1 （AFB1）等真菌毒素是剧毒的水污染物，对生态系统和人类健康构成严重风险。传统的吸附剂结构简单，活性位点不足，导致去除效率低下。方法采用黏土矿物-金属硅酸盐偶联的方法，通过水热法合成纳米结构吸附剂。以斜长石（Pal）和蒙脱土（Mmt）为模板，释放硅- oh基团，实现硅酸镁纳米片的原位生长。该工艺产生了将原始粘土纳米结构与次生硅酸盐纳米通道结合在一起的复合结构。对材料进行了表征，并利用FT-IR和XPS对吸附机理进行了研究。pal衍生吸附剂（NRSN）具有一维（1D）纳米棒和二级纳米结构，而mmt衍生吸附剂（NCSN）具有二维（2D）纳米片和二级纳米结构。两种材料均具有高比表面积和丰富的活性位点（Si-O-Mg, Mg-OH, Si-OH）。它们表现出优异的AFB1吸附能力，NRSN达到19.40 mg/g， NCSN达到24.99 mg/g。吸附主要受电子供体-受体相互作用和氢键作用的支配。本研究将为高效去除高毒性和环境持久性污染物提供新的材料设计原则，同时为粘土矿物的高价值利用提供新的视角。

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引用次数: 0

Generalized IMC-PD decoupled dual-loop control of delay-dominated chemical systems using stability-constrained crayfish optimization 基于稳定约束小龙虾优化的广义IMC-PD解耦双环控制

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-06 DOI: 10.1016/j.jtice.2025.106563

Obaid Siddiqui , G. Lloyds Raja , Sudipta Chakraborty

Background:

Chemical processes with delay are challenging to control due to the inherent phase lag, sluggish response, and stability issues. These challenges are further amplified when the process exhibits unstable or integrating dynamics, such as in the case of continuously stirred tank reactors (CSTRs). Conventional control techniques often struggle to achieve satisfactory performance and robust stability in such scenarios.

Methods:

To address these issues, this work proposes a generalized Internal Model Control (IMC)–based Proportional Derivative (PD) decoupled dual-loop control framework. The inner PD controller is designed using Routh–Hurwitz stability criteria to ensure closed-loop stability. The IMC filter parameter and PD controller gains are jointly fine-tuned through a stability-constrained Crayfish Optimization Algorithm, which is employed for the first time in this context. The optimization objective is to minimize the Integral Square Error (ISE), ensuring both performance and robustness.

Significant Findings:

The proposed control structure is validated using several benchmark chemical process models from the literature, demonstrating significant improvements in performance and robustness over existing methods. Furthermore, experimental validation is carried out to assess the practical applicability and effectiveness of the design in real-world conditions.

背景：具有延迟的化学过程由于其固有的相位滞后、响应迟缓和稳定性问题而难以控制。当过程表现出不稳定或集成动力学时，例如在连续搅拌槽式反应器（cstr）的情况下，这些挑战进一步放大。在这种情况下，传统的控制技术往往难以达到令人满意的性能和鲁棒稳定性。方法：为了解决这些问题，本工作提出了一个基于广义内模控制（IMC）的比例导数（PD）解耦双环控制框架。内部PD控制器采用Routh-Hurwitz稳定性准则设计，以确保闭环稳定性。通过稳定性约束的小龙虾优化算法对IMC滤波器参数和PD控制器增益进行联合微调，该算法在本文中首次被采用。优化目标是最小化积分平方误差（ISE），同时保证性能和鲁棒性。重要发现：本文提出的控制结构使用文献中的几个基准化学过程模型进行了验证，与现有方法相比，在性能和鲁棒性方面有了显著改进。此外，还进行了实验验证，以评估设计在实际条件下的实用性和有效性。

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引用次数: 0

Effect of Ce doping on the magnetic properties of LaFeO3 nanofibers Ce掺杂对LaFeO3纳米纤维磁性能的影响

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-03 DOI: 10.1016/j.jtice.2025.106615

Hanqiong Luo , Chao Song , Jiayue Xu, Yuhao Gan, Jiaqi Yu, Yin Wang, Yajiao Song, Jinghai Liu, Quanli Hu

Background

LaFeO₃ has unique physicochemical properties and exhibits great application potential in fields such as catalysis, sensors, energy conversion and storage, as well as magnetic storage. LaFeO₃ possesses fascinating magnetic characteristics. Ce doping in LaFeO₃ can bring about changes in the physicochemical properties.

Method

A simple electrospinning and annealing way were used to fabricate Ce-doped LaFeO₃ nanofibers, such as La_{0.9Ce_0.1}FeO₃, La_0.8Ce_0.2FeO₃, and La_0.7Ce_0.3FeO₃. The perovskite orthorhombic structures of the fabricated samples were revealed by Rietveld refined XRD patterns. The magnetic characteristics of these fabricated nanofibers were clarified by a Quantum Design SQUID vibrating sample magnetometer.

Significant finding

Magnetic properties indicated that LaFeO₃ nanofibers featured the coexistence of weak ferromagnetism and antiferromagnetism. An appropriate amount of Ce doping can notably enhance the ferromagnetism, with the magnetization increasing significantly. The internal mechanism through which Ce doping influenced the magnetism of LaFeO₃ nanofibers was thoroughly explored, providing a crucial theoretical basis and experimental reference for the optimal design and extensive application of LaFeO₃-based magnetic materials. These findings are expected to inspire the advancement of lanthanum ferrite nanomaterials for applications in storage devices and sensors.

lafeo3具有独特的物理化学性质，在催化、传感器、能量转换与存储、磁存储等领域显示出巨大的应用潜力。LaFeO3具有迷人的磁性。在LaFeO3中掺杂Ce会引起其物理化学性质的变化。方法采用简单的静电纺丝和退火法制备La0.9Ce0.1FeO3、La0.8Ce0.2FeO3和La0.7Ce0.3FeO3掺杂的LaFeO3纳米纤维。用Rietveld细化XRD图分析了制备样品的钙钛矿正交结构。利用量子设计SQUID振动样品磁强计对制备的纳米纤维的磁性特性进行了研究。磁性能表明LaFeO3纳米纤维具有弱铁磁性和反铁磁性共存的特点。适量的Ce掺杂能显著增强材料的铁磁性，磁化强度显著提高。深入探讨了Ce掺杂影响LaFeO3纳米纤维磁性的内在机理，为LaFeO3基磁性材料的优化设计和广泛应用提供了重要的理论依据和实验参考。这些发现有望激发铁酸镧纳米材料在存储设备和传感器中的应用。

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引用次数: 0

Conversion of waste biomass to highly porous biochar for tricresyl phosphate removal: Adsorption performance study and exhausted adsorbent re-utilization 废生物质转化为高孔生物炭去除磷酸三甲酰基：吸附性能研究和废吸附剂再利用

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-03 DOI: 10.1016/j.jtice.2025.106616

Yi Xie , Jiali Yu , Mingjin Cai , Lefang Chen , Yongkui Zhang , Yabo Wang , Bi Chen

Background

Organophosphorus esters (OPEs) are hazardous pollutants frequently detected in aquatic environments at concentrations ranging from ng L^‒1 to μg L^‒1. It has been widely detected in samples from wastewater treatment plants and in surface waters of lakes and rivers, exhibiting reproductive toxicity, neurotoxicity, cardiotoxicity, and hepatotoxicity to organisms. Adsorption is regarded as a promising technology to treat low concentration pollutants in water, which requires highly efficient and cost-effective adsorbents. Adsorbents prepared from waste biomass are attracting increasing attention from researchers.

Methods

Waste biomass of baijiu distillers’ grains (BDGs) was applied as the precursor to prepare biochar in the presence of potassium salt as activator. The biochar materials were evaluated as adsorbents for tricresyl phosphate (TCP) removal from water. Both batch and continuous adsorption performances were investigated.

Significant findings

Superior adsorption performances towards TCP were achieved, including a large adsorption capacity (653.6 mg g^‒1), good adaptability to solution pH and background water quality, and 5% and 95% breakthrough time of 3.67 h and 17.53 h in column adsorption process. The exhausted adsorbent could be converted to metal phosphide loaded carbon catalyst for advanced oxidation reaction, providing another choice for waste adsorbent disposal and re-utilization of P resource in OPEs.

有机磷酯（OPEs）是水生环境中经常检测到的有害污染物，浓度从ng L-1到μg L-1不等。它已在污水处理厂和湖泊、河流的地表水样本中广泛检测到，对生物体表现出生殖毒性、神经毒性、心脏毒性和肝毒性。吸附是一种很有前途的处理水中低浓度污染物的技术，它需要高效、经济的吸附剂。利用废弃生物质制备吸附剂越来越受到研究人员的关注。方法以白酒糟废生物质为前驱体，以钾盐为活化剂制备生物炭。研究了生物炭材料作为吸附水中磷酸三甲酰基（TCP）的性能。考察了间歇吸附和连续吸附性能。结果表明：该工艺对TCP具有良好的吸附性能，吸附量大（653.6 mg g-1），对溶液pH和本底水质具有良好的适应性，柱式吸附过程中5%和95%的突破时间分别为3.67 h和17.53 h。废吸附剂可转化为负载金属磷化物的碳催化剂进行深度氧化反应，为OPEs废吸附剂的处理和P资源的再利用提供了另一种选择。

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引用次数: 0

Y2O3-doped ZnO-C-N nanorods as effective catalysts for oxygen evolution reaction in anion exchange membrane water electrolyzers y2o3掺杂ZnO-C-N纳米棒作为阴离子交换膜水电解槽析氧反应的有效催化剂

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-03 DOI: 10.1016/j.jtice.2025.106600

Suganthi Nachimuthu , S. Thangavel , Yong-Song Chen , Karthik Kannan

Background

This study examines the vertically aligned Y₂O₃-doped ZnO-C-N nanorods with a nickel foam electrode as the anode for the oxygen evolution reaction (OER) in anion exchange membrane water electrolyzers (AEMWEs). Y₂O₃-doped ZnO-C-N nanorods have not been used for the water electrolysis application.

Methods

The Y₂O₃-doped ZnO-C-N nanomaterials were synthesized using a sol-gel method. Subsequently, the electrode materials were fabricated via the slurry coating technique for AEMWEs applications.

Significant findings

Through various characterization techniques, the Y₂O₃-doped ZnO-C-N nanorods with the nickel foam electrode demonstrated superior OER activity compared to the ZnO-C-N nanoflower with the same electrode, exhibiting a higher current density. SEM analysis confirms the nanoflower and nanorod structures of ZnO-C-N and Y₂O₃-doped ZnO-C-N, respectively. XRD analysis verified the presence of a hexagonal wurtzite structure and a cubic structure of ZnO and Y₂O₃, respectively, in all synthesized samples. Additionally, an investigation into the effects of Y₂O₃ impurities in ZnO-C-N on electrochemical properties revealed their influence on OER performance with lower overpotential (380 mV at 10 mA cm^-2) and Tafel slope of 94.35 mV/dec. The enhanced electrochemical performance can be attributed to the vertically aligned nanorod microstructure, which facilitates electron transport and ion diffusion during repeated charge/discharge cycles. This study underscores the importance of hydrogen generation and highlights the role of AEMs utilizing non-noble metal catalysts at reduced costs.

本研究以泡沫镍电极为阳极，在阴离子交换膜水电解槽（AEMWEs）中研究了垂直排列的y2o3掺杂ZnO-C-N纳米棒的析氧反应（OER）。掺杂y2o3的ZnO-C-N纳米棒尚未用于水电解。方法采用溶胶-凝胶法制备Y₂O₃掺杂ZnO-C-N纳米材料。随后，通过浆液涂层技术制备了用于AEMWEs的电极材料。通过各种表征技术，与具有相同电极的ZnO-C-N纳米花相比，带有镍泡沫电极的掺杂y2o3的ZnO-C-N纳米棒表现出更好的OER活性，表现出更高的电流密度。SEM分析证实了ZnO-C-N和y2o3掺杂ZnO-C-N的纳米花和纳米棒结构。XRD分析证实，所有合成样品中ZnO和Y2O3分别存在六方纤锌矿结构和立方结构。此外，研究了ZnO-C-N中Y2O3杂质对电化学性能的影响，发现其对过电位（10 mA cm-2时380 mV）和Tafel斜率（94.35 mV/dec）较低的OER性能有影响。垂直排列的纳米棒结构有助于在重复充放电循环中促进电子传递和离子扩散，从而增强了电化学性能。这项研究强调了制氢的重要性，并强调了以较低成本利用非贵金属催化剂的AEMs的作用。

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引用次数: 0

Co-silanization engineering to construct molecular diffusion barrier for copper metallization on silicon 共硅化工程在硅上构建铜金属化分子扩散屏障

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-03 DOI: 10.1016/j.jtice.2025.106614

Tzu-Yu Chu , Chi-Chien Chang , Chun-Jen Huang , Zhen-Yi Wu , Ming-Tzer Lin , Chih-Ming Chen

Background

Diffusion barrier is important in the development of integrated-circuit (IC) technology because it is essential to maintain the electrical and structural integrity of the Cu/SiO₂/Si heterojunctions. With the advancement of ultrafine-pitch IC layouts, the thickness of diffusion barrier must downscale to few atomic layers which is a critical reliability issue for film coverage and continuity. Due to molecular self-assembling ability, organosilanes are promising candidates to construct the atomic-level diffusion barrier. However, uncontrolled self-assembling ability usually results in molecular self-polymerization, posing big challenges to the formation of a well-organized network structure.

Methods

In this study, co-silanization technology based on two organosilanes are proposed to overcome the uncontrolled molecular assembling problems. The co-silanized molecular nanolayer is constructed at the Cu/SiO₂ interface by interstitially filling the skinny 3-aminopropyltrimethoxysilane (APTMS) molecule into the gaps between stereoscopically bulky molecule like triphenylsilanol (TPS) or trimethoxyphenylsilane (TMPS).

Significant Findings

The co-silanized TPS@APTMS nanolayer exhibits better barrier efficacy against the Cu diffusion in terms of the suppression of Cu silicide formation as compared to the mono-silanized APTMS nanolayer. The better diffusion barrier efficacy is attributed to the strong steric hindrance effect of TPS molecule which assists the APTMS molecule to co-assemble into a well-oriented and organized network structure.

扩散势垒对于保持Cu/SiO2/Si异质结的电气和结构完整性至关重要，是集成电路技术发展的重要组成部分。随着超细间距集成电路布局的发展，扩散势垒的厚度必须缩小到几个原子层，这是保证薄膜覆盖和连续性的关键问题。有机硅烷具有分子自组装能力，是构建原子级扩散屏障的理想材料。然而，不受控制的自组装能力通常会导致分子自聚合，这对形成组织良好的网络结构提出了很大的挑战。方法本研究提出了基于两种有机硅烷的共硅化技术，以克服不受控制的分子组装问题。通过将3-氨基丙基三甲氧基硅烷（APTMS）分子填充到三苯基硅醇（TPS）或三甲氧基苯基硅烷（TMPS）等立体体积较大的分子间隙中，在Cu/SiO2界面上构建共硅化分子纳米层。与单硅化APTMS纳米层相比，共硅化TPS@APTMS纳米层在抑制硅化铜形成方面表现出更好的阻挡Cu扩散的效果。较好的扩散屏障效能是由于TPS分子具有较强的位阻效应，有助于APTMS分子共组装成取向良好、组织有序的网络结构。

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引用次数: 0

Linear and nonlinear Marangoni stability of a thin film falling down the inside or the outside of a vertical cylinder with slip 薄膜在带滑移的垂直圆柱体内外跌落时的线性和非线性马兰戈尼稳定性

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-02 DOI: 10.1016/j.jtice.2025.106603

L.A. Dávalos-Orozco

Background:

Research on thin liquid films has been of interest since many years ago due to their impact on applications of coating and cooling of walls. It is of interest to find passive ways to modify the flow stability. An important way to change the stability is by means of the chemical treatment of the substrate or else by means of very small topography (roughness) of the substrate. Both have the ability to produce a mean slip at the wall–liquid interface.

Methods:

The small wavenumber and large radius of the cylinder approximation is used to derive a nonlinear evolution equation that describes the free surface deformations of the liquid film falling down a vertical cylinder. This equation is linearized and its linear stability is investigated using normal modes including azimuthal perturbations. The nonlinear free surface deformations are investigated numerically by means of a nonlinear normal modes expansion method.

Significant Findings:

The linear and nonlinear Marangoni instability of a liquid film falling down, inside or outside, a vertical cylinder in the presence of slip at the wall–liquid interface is investigated. It is found that the throttling effect (necking) in the presence of slip is able to change the stability results found in previous papers on films falling down flat inclined walls. A nonlinear evolution of the free surface deformation is derived under the small wavenumber and large radius of the cylinder. The curves of linear growth rate, maximum growth rate and critical Marangoni number are calculated including the azimuthal modes of instability. It is found that from the point of view of the linear growth rate the flow destabilizes with slip in a wavenumber range

k

< k_{+}

. However, slip stabilizes for larger wavenumbers

k

> k_{+}

up to the critical (cutoff) wavenumber. From the point of view of the maximum growth rate, it is found that for flow outside the cylinder slip cannot stabilize the flow, in agreement with results derived for a vertical wall in previous papers. However, due to the throttling effect (necking) slip is able to stabilize the flow inside the cylinder up to a certain Reynolds number, in contrast to previous results for a vertical wall. Explicit formulas were derived for the intersections where slip may change its stability properties. All this findings are also corroborated with nonlinear numerical results of the evolution equation.

背景：由于液体薄膜对墙体涂层和冷却的影响，其研究多年来一直受到人们的关注。寻找被动的改变流动稳定性的方法是一个有意义的问题。改变稳定性的一个重要方法是通过对基材进行化学处理，或者通过基材非常小的地形（粗糙度）。两者都有能力在壁液界面产生平均滑移。方法：利用圆柱近似的小波数和大半径，推导出描述液膜沿垂直圆柱下落时的自由表面变形的非线性演化方程。对该方程进行了线性化处理，并利用包含方位扰动的正态模态研究了其线性稳定性。采用非线性正态模态展开法对非线性自由曲面变形进行了数值研究。重要发现：研究了液膜在垂直圆柱体内部或外部存在滑移时的线性和非线性马兰戈尼不稳定性。发现滑移存在时的节流效应（颈缩）能够改变先前关于薄膜从平坦倾斜壁上跌落的稳定性结果。导出了在圆柱小波数和大半径条件下自由表面变形的非线性演化规律。计算了含失稳方位角模态的线性增长率曲线、最大增长率曲线和临界Marangoni数曲线。从线性增长率的角度来看，流动在k <；k+波数范围内随滑移失稳。然而，滑移稳定较大的波数k >；k+直到临界（截止）波数。从最大增长速率的角度出发，发现对于圆柱外流动，滑移不能使流动稳定，这与前人关于垂直壁面的结果一致。然而，由于节流效应（颈缩），滑移能够将气缸内的流动稳定到一定的雷诺数，这与之前垂直壁面的结果相反。推导了滑移可能改变其稳定性的交叉口的显式公式。所有这些发现也得到了演化方程非线性数值结果的证实。

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引用次数: 0

Hybridization of nanofiltration and photocatalysis via functionalized graphene quantum dot-blended membranes for the degradation and removal of amoxicillin 功能化石墨烯量子点混合膜的纳滤和光催化混合降解和去除阿莫西林

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers

Pub Date : 2026-01-02 DOI: 10.1016/j.jtice.2025.106594

D S Divyadharshini , S. Aparna , Nitish Kumar , G. Arthanareeswaran , R.V. Mangalaraja

Background

Antibiotic contaminants in wastewater have emerged as a critical environmental concern due to their persistence and ability to promote antimicrobial resistance in natural microbial communities. Among advanced treatment strategies, photocatalytic degradation offers a solution by breaking them into harmless byproducts, though challenges like poor stability and catalyst recovery remain

Methods

This study explores the UV-driven photocatalytic degradation of amoxicillin using polyethersulfone (PES) membranes blended with N,S-doped graphene quantum dots (N,S-GQDs) prepared via phase inversion. The membranes were characterized by FTIR, SEM, XRD, AFM, and tensile strength analysis and photocatalytic performance was further evaluated to assess their degradation efficiency.

Significant Findings

The quantum dots incorporated membrane exhibited a reduced water contact angle of 47.7°, indicating enhanced hydrophilicity and water flux. DRS analysis revealed that incorporating N,S-GQDs effectively reduce the bandgap and enhanced its overall optical activity. The superior performance of N,S-GQDs is attributed to their structural properties, which facilitate efficient interaction between the photocatalyst and pollutants. Amoxicillin degradation was systematically evaluated under varying pH [3–11], catalyst loading, and cycle numbers, with maximum efficiency achieved at pH 11. The hybrid membrane showed a flux recovery ratio (FRR) of 78% after AMX treatment, confirming its enhanced antifouling capability compared to pristine PES.

废水中的抗生素污染物由于其持久性和促进天然微生物群落抗菌素耐药性的能力而成为一个关键的环境问题。在先进的处理策略中，光催化降解提供了一种解决方案，即将其分解为无害的副产物，但仍然存在稳定性差和催化剂回收等挑战。方法：本研究利用相转化制备的掺N， s掺杂石墨烯量子点（N,S-GQDs）的聚醚砜（PES）膜，探讨了紫外驱动的阿莫西林光催化降解。通过FTIR、SEM、XRD、AFM、拉伸强度分析等手段对膜进行了表征，并对膜的光催化性能进行了评价。结果表明：量子点掺入膜后的水接触角减小了47.7°，亲水性和水通量增强。DRS分析表明，加入N，S-GQDs可以有效减小带隙，提高其整体光学活性。N，S-GQDs具有优异的性能，其结构特性有利于光催化剂与污染物之间的有效相互作用。在不同的pH[3-11]、催化剂负载和循环次数下，系统地评估了阿莫西林的降解，在pH 11时达到了最高效率。经AMX处理后，杂种膜的通量回收率（FRR）为78%，与原始PES相比，其防污能力有所增强。

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引用次数: 0