Chemical Engineering and Processing - Process Intensification最新文献_第6页

Design and comparison of triple-column extractive distillation and novel double-column distillation for separating ternary azeotrope containing isomers 三柱萃取精馏与新型双柱萃取精馏分离三元共沸异构体的设计与比较

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-15 DOI: 10.1016/j.cep.2025.110661

Shisheng Liang , Guangle Bu , Lingdi Huang , Jia Li

Separation process intensification of ternary azeotropes has consistently been a focal point of research. This study, using the separation of isobutanol/n-butanol/m-xylene mixture as an example, investigated the performance of conventional triple-column extractive distillation and novel double-column distillation process. For triple-column extractive distillation process, the universal quasi-chemical (UNIQUAC) thermodynamic model was employed. By comparing the effectiveness of different entrainers, glycerol was selected as the entrainer, as it successfully eliminates the azeotropic phenomenon in ternary mixture. The process was then designed and optimized using sequential iterative algorithm, followed by an analysis of the liquid-phase composition distribution in the optimized flowsheet. The novel double-column distillation process utilizes method of pressurization to break the azeotropes. It features a simplified flowsheet requiring only two columns and no recycle streams, while also enabling heat integration. Calculations of the total annual cost (TAC) and CO₂ emissions for triple-column extractive distillation and double-column distillation processes revealed that the heat-integrated double-column distillation offers significant advantages in both economic viability and environmental benefits. Compared to triple-column extractive distillation process, its TAC was reduced by 18.3 % and CO₂ emissions were reduced by 25.3 %. The methodology presented in this study provides valuable insights for separation of similar ternary azeotropes containing isomers and meets the requirements of process intensification.

三元共沸物的分离过程强化一直是研究的热点。本研究以异丁醇/正丁醇/间二甲苯混合物的分离为例，考察了传统的三塔萃取精馏和新型的双塔精馏工艺的性能。对于三塔萃取精馏过程，采用通用准化学（UNIQUAC）热力学模型。通过比较不同夹带剂的效果，选择甘油作为夹带剂，因为它能很好地消除三元混合物中的共沸现象。采用序贯迭代算法对工艺流程进行了设计和优化，并对优化后的流程进行了液相组成分布分析。新型的双塔精馏工艺采用加压法分解共沸物。它的特点是简化的流程，只需要两列，没有循环流，同时还支持热集成。对三塔萃取精馏和双塔萃取精馏工艺的年总成本（TAC）和CO2排放进行了计算，结果表明，热集成双塔精馏具有显著的经济可行性和环境效益。与三塔萃取精馏工艺相比，TAC降低18.3%，CO2排放量降低25.3%。本研究提出的方法为含异构体的类似三元共沸物的分离提供了有价值的见解，满足了工艺强化的要求。

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引用次数: 0

Experimental optimization of a short-path distillation of alcoholic extracts from hemp 大麻醇提物短程蒸馏工艺的实验优化

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-14 DOI: 10.1016/j.cep.2025.110658

Oscar Y. Buitrago-Suescún , Carlos Martínez-Riascos , Alvaro Orjuela

Short-path vacuum distillation is a key step for the recovery of high purity cannabinoids from cannabis extracts. Although the technique is readily available, it requires strict control to ensure efficient solvent recovery, high purity of terpene and cannabinoid fractions, minimal thermal degradation, and reduced energy use. This study presents an experimental optimization of short-path distillation for cannabis extracts using a simplex design. Ethanolic extracts from a non-psychoactive cannabis variety grown in Colombia were processed to maximize cannabidiol (CBD) and cannabinoids concentration and yield. Operating variables of the short-path distillation process included pressure (< 20 kPa), heating ramp (0.5–1.5 ºC/min), and Vigreux column length expressed as the number of indentations (2–4). Optimal conditions were reached after seven experiments, and they corresponded to a working pressure of 1.33 kPa, a heating rate of 1 °C/min, and using 3 rows of Vigreux points. Under these conditions, it was found that, by processing an ethanolic extract containing 3.6 wt.% CBD and 0.2 wt.% THC, it was possible to reach a 97% recovery of CBD, a total recovery of cannabinoids of 95%, with a distillate containing nearly 90 wt.% CBD. Obtained results could be used for further process modeling and development of optimal control strategies.

短程真空蒸馏是从大麻提取物中回收高纯度大麻素的关键步骤。虽然这项技术很容易获得，但它需要严格的控制，以确保有效的溶剂回收，萜烯和大麻素馏分的高纯度，最小的热降解和减少能源使用。本研究采用单形设计对大麻提取物的短程蒸馏进行了实验优化。从哥伦比亚种植的非精神活性大麻品种中提取的乙醇提取物进行了加工，以最大限度地提高大麻二酚（CBD）和大麻素的浓度和产量。短程蒸馏过程的操作变量包括压力（20 kPa）、升温斜坡（0.5-1.5ºC/min）和Vigreux塔长（以压痕数表示）（2-4）。经过7次实验，得到了最优条件：工作压力为1.33 kPa，升温速率为1℃/min，使用3排Vigreux点。在这些条件下，发现通过处理含有3.6 wt.% CBD和0.2 wt.% THC的乙醇提取物，有可能达到97%的CBD回收率，大麻素的总回收率为95%，蒸馏物含有近90 wt.% CBD。所得结果可用于进一步的过程建模和最优控制策略的开发。

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引用次数: 0

Green solvent selection for terpene extraction from hemp 大麻中萜烯提取的绿色溶剂选择

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-14 DOI: 10.1016/j.cep.2025.110657

Miguel A. Santaella , Oscar Y. Buitrago-Suescún , Alvaro Orjuela

This study aimed to develop a systematic method for selecting sustainable solvents for extracting terpenes from hemp. Initially, solvents were ranked using a color-coded system from the pharmaceutical industry, and renewability and affinity metrics, resulting in 16 pre-selected candidates. A multicriteria screening followed, incorporating economic, environmental, safety, and occupational health aspects to calculate a Sustainable Cumulative Index (SCI). Based on physicochemical properties and conceptual extraction design, preliminary estimates of mass, energy, and waste intensity enabled the identification of viable green solvents. Data Envelopment Analysis (DEA) was used to define a final set for further experimental testing. Ethyl acetate, ethanol, d-limonene, and water were selected and compared under standardized Soxhlet extractions of hemp threshing residues. Extractable matter and terpene content in processed biomass were 14.4 ± 3.1 wt.%, and 0.0725 wt.%., respectively. Ethanol, had low terpene yield (20.5%) and involved high energy demands in the recovery process. Ethyl acetate showed the highest yield (100%) and a full terpene profile. d-limonene exhibited a high yield (92.2%) but it might face separation challenges due to similar volatility to target monoterpenes and high boiling point. The developed method provides a structured approach to solvent selection and can support the design of green solvents.

本研究旨在建立一种系统的萃取大麻萜类化合物的溶剂选择方法。最初，溶剂使用来自制药行业的颜色编码系统，以及可再生性和亲和力指标进行排名，从而产生16个预先选择的候选溶剂。随后进行了多标准筛选，包括经济、环境、安全和职业健康方面，以计算可持续累积指数（SCI）。基于物理化学性质和概念提取设计，对质量、能量和废物强度的初步估计使确定可行的绿色溶剂成为可能。使用数据包络分析（DEA）来定义最终集以进行进一步的实验检验。选择乙酸乙酯、乙醇、d-柠檬烯和水对大麻脱粒渣进行标准化索氏提取。处理后的生物质中可萃取物和萜烯含量分别为14.4±3.1 wt.%和0.0725 wt.%。,分别。乙醇的萜烯产率较低（20.5%），并且在回收过程中需要较高的能量。乙酸乙酯收率最高（100%），萜烯谱完整。d-柠檬烯具有较高的收率（92.2%），但由于其挥发性与目标单萜相似且沸点高，可能面临分离挑战。该方法为溶剂的选择提供了一种结构化的方法，可以为绿色溶剂的设计提供支持。

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引用次数: 0

Mitigating heat transfer limitation in packed bed reactors through using a novel internal 利用新型内部结构减轻填料床反应器的传热限制

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-09 DOI: 10.1016/j.cep.2025.110654

Junqi Weng , Zhenli Lin , Zhongming Shu , Guanghua Ye , Xinggui Zhou

Aided by particle-resolved CFD simulations, this study proposes a novel metal internal to enhance heat transfer in packed bed reactors, with dry reforming of methane as a model reaction. Under the same bed diameter (i.e., 31.4 mm), the bed with the internal can reduce pressure drop by 39 %, raise cold-spot temperature by 63 K, increase methane conversion by 11 %, and reduce catalyst amount by 27 %, compared to the conventional bed without the internal. Besides, the bed with the internal can adopt a larger bed diameter (61.4 mm for copper internal) to achieve comparable reactor performance with the conventional one (31.4 mm), yielding a 74 % reduction in tube number for a multi-tubular reactor. These improvements can be attributed to the presence of orderly catalyst particle packing and heat transfer “highway” after introducing this internal. This proposed metal internal is simple yet effective and thus shows great potential for industrial applications.

借助颗粒解析CFD模拟，本研究提出了一种新型金属内部来增强填充床反应器的传热，并以甲烷干重整为模型反应。在相同床径（即31.4 mm）条件下，与不加内装床相比，加内装床的压降降低39%，冷点温度提高63 K，甲烷转化率提高11%，催化剂用量减少27%。此外，内部床可以采用更大的床径（61.4 mm内铜），以达到与传统反应器（31.4 mm）相当的反应器性能，使多管式反应器的管数减少74%。这些改进可以归因于有序的催化剂颗粒堆积和传热“高速公路”的存在后，引入了这个内部。这种提议的金属内部简单而有效，因此在工业应用中显示出巨大的潜力。

引用次数: 0

Structure-induced flow modulation in static mixer plug flow reactors for gas–liquid contact intensification in ozone-based oxidation 臭氧基氧化中气液接触强化的静态混合器塞流反应器结构诱导流动调制

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-09 DOI: 10.1016/j.cep.2025.110655

Shanzhi Yuan , Lvliang Wang , Xuejing Yang , Yuanyuan Qian , Yanxia Xu

Limited ozone solubility hampers gas–liquid mass transfer in ozone-based advanced oxidation processes (AOPs), particularly in continuous flow reactors. Herein, high-resolution computational fluid dynamics simulations were integrated with a multi-objective optimisation framework to investigate the influence of geometric parameters on hydrodynamics, bubble dynamics and energy consumption in a static mixer plug flow reactor. Suboptimal gas inlet configurations induced buoyancy-driven gas holdup and backflow, substantially impairing dispersion and mixing uniformity, as indicated by the relative standard deviation (RSD) of gas-phase and bubble size distributions. Optimised inlet position and diameter promoted early fluid bifurcation and shear-induced bubble breakup, improving micro- and macro-mixing. Twisting elements generated localised velocity peaks and strong pressure gradients, efficiently converting pressure into kinetic energy and yielding radially stratified, symmetrical flows, facilitating gas–liquid contact. The number of mixing elements and downstream zone length governed mixing quality and pressure drop, and inlet parameters critically regulated bubble characteristics. The optimised configuration achieved an RSD of 0.790 and a pressure drop of 6435 Pa, reducing mixing heterogeneity and energy consumption by 13.6% and 18.1%, respectively, and yielding a favourable balance between mixing efficiency and energy use. This study establishes a quantitative structure–flow–performance relationship, providing a foundation for scalable, energy-efficient multi-phase reactor design for ozone-based AOPs, along with practical strategies for process intensification and sustainable water treatment.

在基于臭氧的高级氧化过程（AOPs）中，有限的臭氧溶解度阻碍了气液传质，特别是在连续流反应器中。本文采用高分辨率计算流体力学模拟与多目标优化框架相结合的方法，研究了几何参数对静态混合器塞流反应器流体力学、气泡动力学和能耗的影响。从气相和气泡尺寸分布的相对标准偏差（RSD）可以看出，次优的进气配置导致浮力驱动的气含率和回流，严重影响了分散和混合均匀性。优化的入口位置和直径促进了早期流体分叉和剪切诱导的气泡破裂，改善了微观和宏观混合。扭转元件产生局部速度峰值和强大的压力梯度，有效地将压力转化为动能，产生径向分层对称流动，促进气液接触。混合元件的数量和下游区长度决定混合质量和压降，入口参数对气泡特性有重要影响。优化后的RSD为0.790，压降为6435 Pa，混合不均匀性和能耗分别降低了13.6%和18.1%，在混合效率和能耗之间取得了良好的平衡。本研究建立了定量的结构-流量-性能关系，为基于臭氧的AOPs的可扩展、节能多相反应器设计以及工艺强化和可持续水处理的实用策略提供了基础。

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引用次数: 0

Influence of sonication-dilution sequence on ZnO nanorod growth from aqueous precursors 超声稀释顺序对ZnO纳米棒生长的影响

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-08 DOI: 10.1016/j.cep.2025.110653

Anna Drabczyk , Wojciech Bulowski , Grzegorz Putynkowski , Jakub Cyganek , Patryk Kasza , Katarzyna Bucka , Robert P. Socha

Zinc oxide (ZnO) is a wide-bandgap semiconductor that exhibits excellent optical, electrical, piezoelectric, and photocatalytic properties. Its one-dimensional nanostructures, particularly nanorods, are of great interest for applications in optoelectronics, sensors, solar cells and transparent electrodes. The performance of such devices strongly depends on nanorod morphology, which is highly sensitive to synthesis conditions. Although low-temperature, solution-based methods for ZnO nanorod fabrication are widely accessible, achieving reproducible control over their alignment, density and aspect ratio remains challenging. In particular, the impact of precursor suspension processing – especially the sequence of physicochemical steps such as sonication and dilution – has been largely overlooked, despite its critical role in determining dispersion quality and nanorod formation. This study addresses this gap by systematically investigating how the order of suspension processing steps affects the structural and functional characteristics of ZnO nanorods synthesized via an aqueous route. Two sequences – (i) dilution followed by sonication and (ii) sonication followed by dilution – were compared using rheological measurements, dynamic light scattering (DLS), scanning electron microscopy (SEM), UV-Vis spectroscopy and contact angle analysis. The results showed that performing sonication before dilution significantly improved suspension homogeneity, reduced viscosity, and enhanced nanorod growth. Nanorod height increased with heating temperature, while diameter showed no consistent trend. Wettability and optical haze were also strongly influenced by synthesis conditions. By identifying a simple and effective way to control precursor dispersion, this work solves a practical problem in ZnO nanorod synthesis and provides a strategy for enhancing the reproducibility of morphology-dependent properties.

氧化锌（ZnO）是一种宽禁带半导体，具有优异的光学、电学、压电和光催化性能。它的一维纳米结构，特别是纳米棒，在光电子学、传感器、太阳能电池和透明电极方面的应用具有很大的兴趣。这种器件的性能很大程度上取决于纳米棒的形态，而纳米棒的形态对合成条件非常敏感。尽管基于溶液的低温法制备ZnO纳米棒的方法已经广泛应用，但要实现对其排列、密度和纵横比的可重复性控制仍然是一个挑战。特别是，前体悬浮液处理的影响-特别是物理化学步骤的顺序，如超声和稀释-在很大程度上被忽视了，尽管它在决定分散质量和纳米棒形成方面起着关键作用。本研究通过系统地研究悬浮液处理步骤的顺序如何影响通过水溶液合成的ZnO纳米棒的结构和功能特性来解决这一空白。使用流变学测量、动态光散射（DLS）、扫描电子显微镜（SEM）、紫外可见光谱和接触角分析对(i)稀释后超声和（ii）超声后稀释两种序列进行了比较。结果表明，在稀释前进行超声处理可以显著改善悬浮液的均匀性，降低粘度，并促进纳米棒的生长。纳米棒的高度随加热温度的升高而增加，而直径的变化趋势不一致。合成条件对润湿性和光学雾度也有较大影响。通过确定一种简单有效的控制前驱体分散的方法，本工作解决了ZnO纳米棒合成中的一个实际问题，并为提高形貌依赖性质的再现性提供了一种策略。

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引用次数: 0

Insights into the dual-oxidant system of OXONE/H2O2 activated by UVC and hydrodynamic cavitation for enhanced micropollutants degradation UVC和流体动力空化活化OXONE/H2O2双氧化系统增强微污染物降解的研究进展

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-06 DOI: 10.1016/j.cep.2025.110652

Abolfazl Dehghani, Soroush Baradaran

Sulfate radical based advanced oxidation processes (SR-AOPs) have received considerable attention, however the efficiency of dual oxidant system of Peroxymonosulfate/hydrogen peroxide (PMS/H₂O₂) and the potential of external activation methods for this system remain poorly understood. In this study, a systematic evaluation of novel hybrid AOP of PMS/H₂O₂ activated by of UV light and hydrodynamic cavitation (HC) was conducted using Box-Behnken Design (BBD) for Tartrazine (TTZ) degraadation. Single effect and interactive effect analyses revealed a complex interplay between three main parameters (PMS, H₂O₂ and reaction time). While HC and UV alone achieved only 3.55 % and 7.38 % degradation of TTZ, the combined HC/UV/PMS/H₂O₂ process exhibited a remarkable 96.46 % degradation with a high synergistic coefficient of 8.71 under optimized conditions (PMS=250 mg L⁻¹, H₂O₂=200 mg L⁻¹, time=60 min). In addition, quenching studies showed that the free radical is primarily responsible for degradation of TTZ and the contribution of hydroxyl (•OH) and sulfate (SO₄•⁻) radicals was equal to 83.96 % and 16.04 %, respectively. Additionally, at the optimized conditions, the hybrid AOP yielded remarkable degradation rates of 92.5 %, 90.9 %, and 89.4 % for Congo Red (CR), Metronidazole (MDZ), and Ofloxacin (OFX), respectively, within 60 min.

基于硫酸盐自由基的高级氧化工艺（SR-AOPs）已经得到了相当多的关注，然而，过氧单硫酸盐/过氧化氢（PMS/H2O2）双氧化系统的效率以及该系统的外部活化方法的潜力仍然知之甚少。本研究采用Box-Behnken设计（BBD）对紫外光和流体动力空化（HC）激活的新型PMS/H2O2杂交AOP降解酒黄（TTZ）进行了系统评价。单效应和交互效应分析显示，三个主要参数（PMS、H2O2和反应时间）之间存在复杂的相互作用。在优化条件（PMS=250 mg L−1,H2O2=200 mg L−1，时间=60 min）下，HC/UV/PMS/H2O2联合工艺对TTZ的降解率为96.46%，协同系数为8.71，而HC和UV单独工艺对TTZ的降解率分别为3.55%和7.38%。此外，淬火研究表明，自由基对TTZ的降解起主要作用，羟基（•OH）和硫酸（SO₄•⁻）自由基的贡献分别为83.96%和16.04%。此外，在优化条件下，混合AOP在60 min内对刚果红（CR）、甲硝唑（MDZ）和氧氟沙星（OFX）的降解率分别为92.5%、90.9%和89.4%。

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引用次数: 0

Study on the recovery process of fluorine / sodium and carbon resources in the residual anode of electrolytic aluminum by ultrasonic synergistic alkali leaching 超声协同碱浸法回收电解铝残阳极中氟/钠和碳资源的工艺研究

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-04 DOI: 10.1016/j.cep.2025.110651

Bensong Chen , Jiarong Xiong , Xingyu Xu , Hongying Xia , Wanzhang Yang , Libo Zhang

To address the issues of harmful elements such as fluorine and sodium in the low content impurity aluminum electrolytic residual anode Low Content-Spent Carbon Anode (LC-SCA) in the traditional treatment process cannot be efficiently removed and the recovery rate of carbon resources is low, an efficient treatment process of sodium hydroxide solution leaching low content aluminum electrolytic residual anode combined with ultrasonic strengthening is proposed in this study to effectively solve the above problems. The study shows that, under the optimal conditions, the leaching rates of fluorine and sodium were 95.36 % and 94.89 %, with the carbon purity increased to 96.02 %. Compared with conventional leaching, it shortened leaching time by 40 % and improved fluoride/sodium leaching rates by 5.6 % and 5.3 %. Various characterizations were used to characterize the LC-SCA before and after leaching. The SEM-EDS surface scan results show that fluorine and sodium mainly exist in the pores of the carbon matrix, and their embedded structure is difficult to be removed efficiently by traditional leaching. This process not only effectively solves the problem of high-efficiency removal of fluorine and sodium, but also realizes the high-purity recovery of carbon powder, which provides a new strategy for the harmless.

针对低含量杂质铝电解残阳极低含量废碳阳极（LC-SCA）中氟、钠等有害元素在传统处理工艺中无法有效去除、碳资源回收率低的问题，为有效解决上述问题，本研究提出了氢氧化钠溶液浸出低含量铝电解残阳极结合超声强化的高效处理工艺。研究表明，在最优条件下，氟和钠的浸出率分别为95.36%和94.89%，碳纯度提高到96.02%。与常规浸出相比，浸出时间缩短40%，氟/钠浸出率分别提高5.6%和5.3%。采用各种表征方法对LC-SCA浸出前后进行了表征。SEM-EDS表面扫描结果表明，氟和钠主要存在于碳基体的孔隙中，其嵌入结构难以通过传统浸出有效去除。该工艺不仅有效地解决了氟、钠的高效脱除问题，而且实现了碳粉的高纯度回收，为无害化提供了新的策略。

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引用次数: 0

Characterization of a photocatalytic packed-bed reactor for continuous phenol degradation: performances under steady-state and transient regimes 连续降解苯酚的光催化填料床反应器的表征：在稳态和瞬态状态下的性能

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-04 DOI: 10.1016/j.cep.2025.110650

Waichaya Sirimongkhol , Chetsada Khositanon , Yosuke Muranaka , Jisong Zhang , Nopphon Weeranoppanant

A packed bed reactor (PBR) offers a simple platform for continuous flow photocatalysis, providing a large specific surface area for photocatalyst immobilization. In this work, TiO₂-based phenol degradation was selected as a model system. A layer-by-layer immobilization technique using polyethyleneimine (PEI) and polystyrene sulfonate (PSS) was employed to fix TiO₂ onto the surface of glass beads. Process and design parameters, including space time, phenol solution-to-air volumetric ratio, light power, and reactor-to-bead diameter ratio, were investigated in terms of reactor performance under both steady-state and transient regimes. In particular, the reactor-to-bead diameter ratio, which significantly influences the time required to reach steady state (i.e., the transient time), was further analyzed using residence time distribution (RTD) characterization, light transmission measurements, and mass transfer coefficient estimation. When benchmarked against other types of photoreactors used for TiO₂-based phenol degradation, the PBR demonstrated a relatively high space time yield (9.3040 m³ water m⁻³ reactor·h⁻¹), while achieving a relatively high photocatalytic space time yield of 7.54 × 10^–4 m³ water m⁻³ reactor·h⁻¹·kW⁻¹. This work provides insights into practical implementation by accounting for both transient and steady-state aspects of continuous phenol degradation in a PBR.

填充床反应器（PBR）为连续流光催化提供了一个简单的平台，为光催化剂固定化提供了较大的比表面积。在这项工作中，选择tio2基苯酚降解作为模型系统。采用聚乙烯亚胺（PEI）和聚苯乙烯磺酸盐（PSS）逐层固定技术将TiO 2固定在玻璃微珠表面。在稳态和瞬态状态下，研究了工艺和设计参数，包括时空、苯酚溶液与空气的体积比、光功率和反应器与堆芯直径比。特别是，反应器-球直径比，它显著影响达到稳态所需的时间（即瞬态时间），进一步分析使用停留时间分布（RTD）表征，光透射测量和传质系数估计。当与其他用于TiO₂基苯酚降解的光反应器进行对比时，PBR显示出相对较高的时空产率（9.3040 m³水m - 3反应器·h⁻¹），而相对较高的光催化时空产率为7.54 × 10-4 m³水m - 3反应器·h⁻¹。这项工作通过考虑PBR中连续苯酚降解的瞬态和稳态方面，为实际实施提供了见解。

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引用次数: 0

Innovative Gamma-irradiated membrane for enhanced performance in membrane distillation treatment of real textile-dye wastewater 新型γ辐照膜在膜蒸馏处理染料废水中的应用

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-12-03 DOI: 10.1016/j.cep.2025.110646

Hau Thi Nguyen , Hung Cong Duong , Nguyen Cong Nguyen , Tuan Hung Pham , Song Toan Pham Phu , Doan Van Hong Thien , Duong Thi Thanh , Minh-Hiep Nguyen , Xuan-Cuong Le

For the first time, a novel method to enhance the water flux and wetting resistance of polyvinylidene fluoride (PVDF)-based membrane distillation (MD) membranes by subjecting the polymer solution to gamma irradiation prior to phase inversion (i.e. denoted as deep gamma-irradiated PVDF-MD membrane) was implemented in this study. Compared to conventionally prepared PVDF-MD membrane (i.e. phase-inversion without gamma-irradiation), the deep gamma-irradiated PVDF-MD membrane exhibited larger but more evenly distributed pore sizes and higher porosity (i.e. 84 ± 1.9 % vs 76 ± 1.2 %), resulting in a 1.8-fold increase in water flux. The enhanced membrane pore structure and water flux of the deep gamma-irradiated PVDF-MD membrane were attributed to the facilitated cross-linking between polymers induced by high-energy gamma-irradiation. Moreover, the fourier transform infrared spectroscopy data indicate that the deep gamma-irradiated PVDF-MD membrane exhibited a higher β/α phase ratio compared to the non-irradiated membrane. When tested with a real textile wastewater, the deep gamma-irradiated PVDF-MD membrane achieved water flux of 38.7 L/m².h and colour removal of >99.5 % at feed and distillate temperatures of 70 °C and 20 °C, respectively. Moreover, this enhanced PVDF-MD membrane helped concentrate dye in the wastewater by a factor of 2.5, from an initial colour concentration of 1536 PtCo to 3882 PtCo, after 12 h of operation without any evidence of membrane pore wetting. The results reported here draw important practical implications for realisation of MD to boost circularity in textile dyeing facilities.

在本研究中，首次实现了一种新的方法，通过在相转化之前对聚合物溶液进行伽玛照射来提高聚偏氟乙烯（PVDF）基膜蒸馏（MD）膜的水通量和抗润湿性（即称为深伽玛照射PVDF-MD膜）。与常规制备的PVDF-MD膜（即无γ辐照的相变）相比，深γ辐照PVDF-MD膜具有更大但分布更均匀的孔径和更高的孔隙率（即84±1.9% vs 76±1.2%），导致水通量增加1.8倍。深γ辐照PVDF-MD膜的膜孔结构和水通量的增强是由于高能γ辐照促进了聚合物之间的交联。傅里叶变换红外光谱数据表明，与未辐照膜相比，深γ辐照PVDF-MD膜具有更高的β/α相比。在实际纺织废水中进行测试时，在进料温度为70°C和馏分温度为20°C时，深γ辐照PVDF-MD膜的水通量分别为38.7 L/m2.h，去色率为99.5%。此外，这种增强的PVDF-MD膜有助于将废水中的染料浓缩2.5倍，从初始颜色浓度1536 PtCo到3882 PtCo，经过12小时的操作，没有任何膜孔湿润的迹象。本文报告的结果为实现MD以促进纺织染色设施的循环性提供了重要的实际意义。

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