Chemical Engineering Science最新文献_第7页

Mechanochemical CuS-Modified Mn3Fe2Ox for mercury removal and sulfur resistance 机械化学cu改性mn3fe2o的除汞和抗硫性能

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-02-10 DOI: 10.1016/j.ces.2026.123560

Shilin Zhao , Xinlin Wang , Yuxin Qian , Haitao Hu , Zhiqiang Sun

The efficient removal of elemental mercury Hg⁰ from coal-fired flue gas remains a critical challenge in air pollution control. In this work, a sulfur-resistant adsorbent was developed by introducing CuS into Mn₃Fe₂Ox through mechanochemical method. Experimental evaluation, material characterization, and density functional theory calculations were combined to elucidate the inhibitory effect of SO₂ on Mn₃Fe₂O_x and the enhanced sulfur resistance of CuS-modified Mn₃Fe₂O_x (CuS/Mn₃Fe₂O_x). Oxygen vacancies (O_v) are identified as the primary active sites in Hg⁰ removal process for Mn₃Fe₂O_x. The presence of SO₂ competes for O_v, and weakens the role of lattice oxygen (O_l) in Hg⁰ adsorption, which facilitates HgSO₄ formation via interactions among SO₂, Hg²⁺, and active oxygen (O_l and adsorbed oxygen (O_α)). Consequently, the Hg⁰ removal efficiency of Mn₃Fe₂O_x decreases from 97.3% without SO₂ to 88.3% with SO₂, where Hg⁰ oxidation escape remains dominant. The CuS modification induces lattice distortion and increases O_v density, while Cu serves as sacrificial sites against SO₂ and S incorporation improves Hg⁰ affinity. Therefore, (0.5–2) CuS/Mn₃Fe₂O_x achieves over 96% Hg⁰ removal efficiency under 1000 ppm SO₂, predominantly by adsorption at an optimized composition. These findings provide mechanistic insights and technical guidance for designing metal oxide-based adsorbents with high Hg⁰ removal efficiency and strong sulfur resistance.

从燃煤烟气中有效去除单质汞Hg0仍然是空气污染控制中的一项重大挑战。本文采用机械化学方法将cu引入mn3fe2o中，制备了一种耐硫吸附剂。结合实验评价、材料表征和密度泛函理论计算，阐明了SO2对mn3fe2o的抑制作用以及cu修饰mn3fe2o （cu / mn3fe2o）的抗硫性增强。氧空位（Ov）是mn3fe2o脱除Hg0过程中的主要活性位点。SO2的存在与Ov竞争，削弱了晶格氧（Ol）在Hg2+吸附中的作用，促进了SO2、Hg2+和活性氧（Ol和吸附氧（Oα））的相互作用形成HgSO4。结果表明，mn3fe2o的Hg0去除率从无SO2时的97.3%下降到有SO2时的88.3%，其中Hg0氧化逃逸仍占主导地位。Cu修饰引起晶格畸变，增加了Ov密度，Cu作为SO2和S掺入的牺牲位点，提高了Hg0的亲和力。因此，在1000 ppm SO2条件下，（0.5-2）cu / mn3feox的Hg0去除率达到96%以上，主要是通过优化的组分吸附实现的。这些发现为设计具有高脱氢效率和强抗硫性能的金属氧化物基吸附剂提供了机理和技术指导。

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引用次数: 0

rCFD-DEM modelling of the bi-dispersed dense particle-gas reacting flow in a bubbling fluidised bed: from spherical to non-spherical 鼓泡流化床中双分散致密颗粒-气体反应流动的CFD-DEM模型：从球形到非球形

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-01-29 DOI: 10.1016/j.ces.2026.123477

Panxing Kang, Dan Xu, Yansong Shen

The dense non-spherical particle-gas reacting flow has been practised in many industry sectors; and its reactive computational fluid dynamics - discreate element method (rCFD-DEM) has been a longstanding challenge. In this study, our previously proposed smooth coarse-grained (CG) rCFD-DEM model has been fully extended from spherical to non-spherical for modelling dense non-spherical particle-gas reacting flow systems through proposing a novel non-spherical particle conduction model and incorporating the cutting-edge superquadric particle (SQP) method. The model is comprehensively verified and validated by comparing the simulated results with the data from the experimental measurements. The model effectiveness is verified, proving that the proposed smooth CG-SQP-rCFD-DEM with a coarse-grained ratio of 2 not only shows the accurate numerical simulation results but also significantly reduces the computational costs by 93.58% under the given conditions. Then, the model has been applied to clarify how char particle shape impact on the in-reactor flow-thermal-reactive performances in a dense bi-dispersed non-spherical particle-gas bubbling fluidised bed (BFB) char combustor. Results indicate that the heat of reaction and radiation dominate the heat transfer process in the BFB char combustor, and non-spherical char particles with a lower sphericity tend to present a higher thermal and reactive performance. This work provides a cost-effective tool for understanding and optimising the dense non-spherical particle-gas reacting flow systems.

致密非球形颗粒-气体反应流已在许多工业部门得到实践；其反应性计算流体动力学离散元法（rCFD-DEM）一直是一个长期的挑战。在本研究中，我们提出了一种新的非球形颗粒传导模型，并结合了尖端的超二次粒子（SQP）方法，将我们之前提出的光滑粗粒度（CG） rCFD-DEM模型从球形完全扩展到非球形，用于模拟密集的非球形颗粒-气体反应流动系统。将仿真结果与实验测量数据进行了比较，对模型进行了全面验证。验证了模型的有效性，证明所提出的粗粒度比为2的光滑CG-SQP-rCFD-DEM不仅具有准确的数值模拟结果，而且在给定条件下计算成本显著降低93.58%。在此基础上，应用该模型研究了致密双分散非球形颗粒-气体鼓泡流化床（BFB）焦炭燃烧室中，焦炭颗粒形状对其流动-热反应性能的影响。结果表明：在BFB炭燃烧室中，反应热和辐射主导着传热过程，球形度越低的非球形炭颗粒往往表现出较高的热学和反应性能。这项工作为理解和优化致密非球形颗粒-气体反应流系统提供了一种经济有效的工具。

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引用次数: 0

CFD-enhanced co-design framework of industrial-scale multi-stage coaxial swirling lance 工业规模多级同轴旋流喷枪cfd增强协同设计框架

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-02-07 DOI: 10.1016/j.ces.2026.123543

Hongshi Yu, Shiliang Yang, Hua Wang

The Multi-stage Coaxial Swirl Immersed Top-Blowing Lance (MSCSI-TBL) is the key equipment in Top Submerged Lance (TSL) technology. In the current work, a numerical model based on the Reynolds-average equations was developed to simulate the characteristics of Coaxial Swirling Jet (CSJ) induced by MSCSI-TBL, and the key findings are as follows. (i) Mechanism of CSJ induced by MSCSI-TBL: The flow undergoes expansion within both the swirling and mixing zones, converting pressure energy into kinetic energy, as evidenced by increasing axial velocity and decreasing pressure, density, and temperature. In the mixing zone, the high-velocity region migrates inward due to centrifugal force and the entrainment effect of the high-speed outer jet. (ii) Lance Design Insights: A novel criterion based on the blade set angle and the mass-averaged swirl angle is proposed to evaluate the swirling completeness. Given the fundamental difference between confined jets in liquid pools and free jets, key parameters like mixing zone length must be designed based on a gas–liquid system. Consequently, increasing the final-stage blade height and number offers limited swirling enhancement but significantly reduces swirl efficiency. (iii) Performance Characterization of CSJ: axial total pressure and moment of momentum quantify jet impact and shear ability; a modified swirl number addresses circumferential nonuniformity; and total pressure loss with swirl efficiency characterize energy dissipation and flow quality. Crucially, the moment of momentum reveals a near-constant tangential stirring capacity in the mixing zone, offering deeper insights into the limitations of relying solely on the swirl number. The findings of current work offer valuable insights into the design and optimization of MSCSI-TBL in industrial applications.

多级同轴旋流浸没式顶吹喷枪（MSCSI-TBL）是顶吹喷枪（TSL）技术中的关键设备。本文基于Reynolds-average方程建立了模拟MSCSI-TBL诱导的同轴旋流射流（CSJ）特性的数值模型，主要研究结果如下：(1) mssi - tbl诱导CSJ的机理：流动在旋流区和混合区均发生扩张，将压力能转化为动能，表现为轴向速度增大，压力、密度和温度降低。在混合区，由于离心力和高速外射流的夹带作用，高速区向内迁移。（ii） Lance设计见解：提出了一种基于叶片设置角和质量平均旋流角的新准则来评估旋流完整性。考虑到液池中受限射流与自由射流的根本区别，混合区长度等关键参数必须基于气液系统进行设计。因此，增加末级叶片的高度和数量只能提供有限的旋流增强，但会显著降低旋流效率。（iii） CSJ的性能表征：轴向总压和动量矩量化射流冲击和剪切能力；改进的旋流数解决了周向非均匀性；总压损失与旋流效率表征了能量耗散和流动质量。至关重要的是，动量矩揭示了混合区中接近恒定的切向搅拌能力，从而更深入地了解了仅依靠旋流数的局限性。当前工作的发现为工业应用中mssi - tbl的设计和优化提供了有价值的见解。

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引用次数: 0

Design and mechanistic insight into spherical Co-agglomeration based on salt-induced liquid–liquid separation 基于盐诱导液-液分离的球形共团聚设计及机理研究

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-02-08 DOI: 10.1016/j.ces.2026.123559

Pingping Cui , Ling Zhou , Qiuxiang Yin

A cleaner and more efficient method for preparing multi-component spherical co-agglomerates was developed based on salt-induced liquid–liquid separation (SI-SCA) technique in this work. A three-step strategy for spherical co-agglomeration was proposed to rapidly screen suitable organic solvent–drug systems by phase separation experiments and molecular simulation. The wettability of organic solvents on crystal surfaces was evaluated through calculations of isosteric adsorption heat, enabling the selection of systems favorable for spherical agglomeration. After verification, appropriate combinations of drugs and solvent systems were identified for the preparation of multi-component spherical co-agglomerates. Using aspirin, paracetamol, celecoxib and mannitol as model compounds, suitable organic solvents for spherical co-agglomeration were screened from methanol, ethanol, n-propanol, isopropanol and acetone. Using SI-SCA technique, the two-component and three-component spherical co-agglomerates of aspirin, paracetamol, and celecoxib were prepared in water–n-propanol/isopropanol/acetone–NaCl systems. The particle size of the co-agglomerates could be effectively tuned by adjusting experimental parameters such as stirring rate. Furthermore, spherical co-agglomerates with stable and controllable component contents were obtained by modifying the initial feeding concentration of multi-component drugs. The formation mechanism of multi-component spherical co-agglomerates was comprehensively determined by combining real-time monitoring via Process Analytical Technology (PAT) and specific analytical methods including PXRD and SEM.

基于盐诱导液-液分离（SI-SCA）技术，开发了一种更清洁、更高效的制备多组分球形共团聚体的方法。通过相分离实验和分子模拟，提出了一种球形共团聚三步策略，以快速筛选合适的有机溶剂-药物体系。通过计算等容吸附热来评估有机溶剂在晶体表面的润湿性，从而选择有利于球形团聚的体系。经过验证，确定了合适的药物和溶剂系统组合，以制备多组分球形共团。以阿司匹林、扑热息痛、塞来昔布和甘露醇为模型化合物，从甲醇、乙醇、正丙醇、异丙醇和丙酮中筛选出适合球形共团聚的有机溶剂。采用SI-SCA技术，在水-正丙醇/异丙醇/丙酮- nacl体系中制备了阿司匹林、扑热息痛和塞来昔布的双组份和三组份球状共聚物。通过调节搅拌速率等实验参数，可以有效地调节共团聚体的粒径。通过改变多组分药物的初始给药浓度，获得了成分含量稳定可控的球状共团物。通过过程分析技术（PAT）实时监测与PXRD、SEM等具体分析方法相结合，综合确定了多组分球形共团物的形成机理。

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引用次数: 0

A novel sustainable polymer/carboxymethyl cellulose/metal sulfide nanocomposite for clean water production, water retention 一种新型可持续聚合物/羧甲基纤维素/金属硫化物纳米复合材料用于清洁水生产，保水性

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-02-07 DOI: 10.1016/j.ces.2026.123534

Asmaa A. Atwan , Ibrahim M. El-Mehasseb , Naser Talha , Nagi M. El-Shafai

A sustainable nanocomposite (NCP) was developed for pollutant remediation in complex aqueous and soil environments. A novel NCP was synthesized using naturally derived biochar and carboxymethyl cellulose (CMC). Zinc sulfide and calcium sulfide nanoparticles (ZnS/CaS NPs), incorporated into the Carbopol/CMC framework with urea as a nitrogen source, were engineered to enhance pollutant removal, water absorption, and nutrient delivery to soils. The NCP demonstrated high photocatalytic activity, achieving degradation efficiencies of 48.7%, 89.7%, 83.3%, and 95% for MB. It was 16.8%, 26%, 64.5%, and 81% for Rh.B, and it was 91.6%, 87.9%, 66.5%, and 82.3% for MO under Vis, Vis-NaOH, UV, and UV-NaOH, respectively, after 120 min. Additionally, moxifloxacin (Moxi.) degradation under UV light reached 87.7% within 120 min, while adsorption efficiencies of the NCP were 74.6%, 34.2%, 33.3%, and 60.5% for MB, Rh.B, MO, and Moxi., respectively. While the adsorption efficiency on the surface NCP was 74.6%, 34.2%, 33.3%, and 60.5% for MB, Rh.B, MO, and Moxi, respectively. The incorporation of CMC into Carbopol significantly enhanced the nanocomposite’s water-holding and retention properties by forming a hydrogel-like network that can store and gradually release water. With its large specific surface area, high adsorption and photocatalytic performance, and favorable optical characteristics, the developed NCP represents a promising, eco-friendly material for clean water applications and sustainable agricultural enhancement.

研究了一种可持续的纳米复合材料（NCP），用于复杂水、土壤环境中的污染物修复。以天然生物炭和羧甲基纤维素（CMC）为原料合成了一种新型NCP。将硫化锌和硫化钙纳米颗粒（ZnS/CaS NPs）与尿素作为氮源结合到Carbopol/CMC框架中，以增强污染物去除、吸水和向土壤输送养分。NCP具有较高的光催化活性，对MB的降解效率分别为48.7%、89.7%、83.3%和95%，对Rh的降解效率分别为16.8%、26%、64.5%和81%。MO在Vis、Vis- naoh、UV和UV- naoh作用120 min后分别为91.6%、87.9%、66.5%和82.3%。紫外光对莫西沙星（Moxi.）的降解在120 min内达到87.7%，而NCP对MB、Rh的吸附效率分别为74.6%、34.2%、33.3%和60.5%。B， MO和Moxi。,分别。NCP对MB、Rh的吸附效率分别为74.6%、34.2%、33.3%和60.5%。B， MO，和Moxi。将CMC加入到Carbopol中，通过形成类似水凝胶的网络，可以储存并逐渐释放水分，从而显著增强了纳米复合材料的持水和保持性能。NCP具有大的比表面积、高的吸附和光催化性能以及良好的光学特性，是一种有前途的环保材料，可用于清洁水和可持续农业。

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引用次数: 0

Alternating magnetic field-driven electron transfer at metal-oxide interfaces enables synergistic dual-pathway catalysis for dry reforming of methane 交变磁场驱动的金属氧化物界面电子转移使甲烷干重整的协同双途径催化成为可能

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-02-03 DOI: 10.1016/j.ces.2026.123506

Xiaoge Lu , Zhuangzhuang Zhang , Xiang Liu , Yaxin Jing , Yurong Yin , Xinyu Qi , Liping He , Chengyi Dai , Xiaoxun Ma

Lowering reaction temperature and improving catalyst stability are two major technical challenges that restrict the industrial application of the dry reforming of methane (DRM). Here, we synthesized an inverse-structured magnetic core–shell catalyst (NiCo@NiCoO_x@C) and applied it to DRM reaction driven by a magnetic induction heating (MIH) system. At a bed temperature of 550 °C, Ni₁Co₁@NiCoO_x@C achieved nearly 90% conversion of CH₄ and CO₂. Compared with conventional resistive heating (RH), it reduced the required bed temperature by 250 °C and increased stability by a factor of 2.2. In the MIH system, DRM reaction proceeds via a dual pathway, mediated by HCOO* and CH_xO*. Owing to the skin effect, the alternating magnetic field (AMF) promotes electron transfer at the metal-oxide (NiCo/NiCoO_x) interface, modulates interfacial electron distribution to enhance CO₂ adsorption and activation at oxygen vacancies while suppressing CO adsorption, and simultaneously facilitates hydrogen spillover and lattice oxygen cycling, significantly accelerating reaction kinetics and improving catalyst stability. This work provides new insights and strategies for efficiently driving DRM at low temperatures, which is of great significance for advancing the industrial application of DRM.

降低反应温度和提高催化剂稳定性是制约甲烷干重整工业应用的两大技术难题。本文合成了一种反结构的磁性核壳催化剂（NiCo@NiCoOx@C），并将其应用于磁感应加热（MIH）系统驱动的DRM反应。在床层温度为550℃时，Ni1Co1@NiCoOx@C的CH4和CO2转化率接近90%。与传统的电阻加热（RH）相比，它将所需的床层温度降低了250℃，并将稳定性提高了2.2倍。在MIH体系中，DRM反应通过HCOO*和CHxO*介导的双途径进行。由于集皮效应，交变磁场（AMF）促进金属-氧化物（NiCo/NiCoOx）界面上的电子转移，调节界面电子分布，增强CO2在氧空位处的吸附和活化，抑制CO的吸附，同时促进氢溢出和晶格氧循环，显著加快反应动力学，提高催化剂稳定性。本研究为低温下高效驱动DRM提供了新的见解和策略，对推进DRM的工业应用具有重要意义。

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引用次数: 0

Microwave-assisted sol-gel synthesis of Mg/W codoped TiO2 nano catalysts for dual applications in binary dye degradation and dimethoate pesticide detection 微波辅助溶胶-凝胶合成Mg/W共掺杂TiO2纳米催化剂在二元染料降解和乐果农药检测中的双重应用

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-02-03 DOI: 10.1016/j.ces.2026.123507

Sandhya Rani Nayak , Bala Venkata Sailaja Budati , Siva Rao Tirukkovalluri , Sai Supriya Singupilla , Samuel Chufamo Jikamo , Nageswararao Kadiyala , Winnie Teja Dokka

The present study aims to establish a simple and rapid microwave-assisted sol–gel route for the synthesis of uniform and well-defined magnesium (Mg) and tungsten (W) co-doped TiO₂ Nano catalysts with enhanced visible-light activity. Mg doping narrows the band gap, while W doping promotes electron trapping and suppresses charge recombination, resulting in synergistically improved photocatalytic and electrochemical performance within a single, structurally stable material. Structural assessments, including Powder X-ray Diffraction (confirming the anatase phase), Transmission Electron Microscopy (revealing a particle size of 5.10 nm), Brunauer-Emmett-Teller surface area analysis (166.4 m²/g), and Scanning Electron Microscopy (examining the Spherical morphology), were conducted. The catalysts were further evaluated for optical characteristics: UV–vis diffuse reflectance spectrum (indicating an energy gap of 2.48 eV), EDAX verified elemental incorporation, and electrochemical analyses (EIS) PL, XPS, VB-XPS confirmed efficient charge transfer and dopant integration. Substitutional doping of dopants into the TiO₂ lattice was confirmed through X-ray photoelectron spectroscopy and Fourier Transform Infra-Red analysis. The thermal behaviour and stability were evaluated by TGA/DTA and DTG analyses, confirming that the compound is thermally stable up to 800 °C. Under visible light, MWT3M3 showed remarkable photocatalytic activity, degrading 97 % of Amido Black 10B and 98 % of Rhodamine B within 60 min. Cyclic voltammetry studies under dark and light conditions demonstrated its excellent electrochemical sensing capability toward Dimethoate in Solanum lycopersicum. The modified glassy carbon electrode exhibited stable redox behaviour and high diffusion coefficients, enabling sensitive and reproducible pesticide detection, demonstrating MWT3M3 as an efficient nanocatalyst for environmental remediation and electrochemical sensing.

本研究旨在建立一种简单快速的微波辅助溶胶-凝胶路线，用于合成均匀且定义明确的镁（Mg）和钨(W)共掺杂TiO2纳米催化剂，并增强其可见光活性。Mg掺杂缩小了带隙，而W掺杂促进了电子捕获并抑制了电荷重组，从而在单一结构稳定的材料中协同提高了光催化和电化学性能。进行了结构评估，包括粉末x射线衍射（确认锐钛矿相）、透射电子显微镜（显示粒度为5.10 nm）、brunauer - emmet - teller表面积分析（166.4 m2/g）和扫描电子显微镜（检查球形形貌）。进一步评估了催化剂的光学特性：紫外-可见漫反射光谱（表明能量差为2.48 eV）， EDAX验证了元素掺入，电化学分析（EIS） PL， XPS， VB-XPS证实了有效的电荷转移和掺杂。通过x射线光电子能谱和傅里叶变换红外分析证实了掺杂剂在TiO2晶格中的取代掺杂。通过TGA/DTA和DTG分析评价了该化合物的热行为和稳定性，证实该化合物在800°C内热稳定。在可见光下，MWT3M3表现出显著的光催化活性，在60 min内可降解97%的氨基黑10B和98%的罗丹明B。暗、光条件下的循环伏安研究表明，该材料对茄中的乐果有良好的电化学传感能力。改性后的玻璃碳电极表现出稳定的氧化还原行为和高扩散系数，实现了灵敏和可重复性的农药检测，证明了MWT3M3是一种高效的环境修复和电化学传感纳米催化剂。

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引用次数: 0

Three-dimensional electro-fenton system packed with red-mud based NiO particle electrode for the enhanced removal of lomefloxacin hydrochloride 红泥基NiO颗粒电极填充三维电fenton系统对盐酸洛美沙星的强化去除

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-02-10 DOI: 10.1016/j.ces.2026.123569

Youlian Zhu , Guangtao Wei , Jun Xiao, Linye Zhang, Zhiwei Xie, Chengfeng Wei

In this work, red mud-based NiO particle electrodes (NiO/RM PEs) were successfully synthesized via a simple impregnation-calcination method and applied in a three-dimensional electro-Fenton (3DEF) system for the degradation of lomefloxacin hydrochloride (LOMH). The characterization results confirmed that the NiO/RM PEs were successfully synthesized. Under the optimal reaction conditions of NiO/RM PEs of 5.32 g/L, current density of 6.0 mA/cm², aeration rate of 4.0 L/min, initial pH of 6.55, and Na₂SO₄ dosage of 6.3 mmol, the removal ratio of LOMH reached 83.96%. Electrochemical analyses (CV and EIS) demonstrated that the NiO/RM PEs exhibited low charge-transfer resistance and enhanced electrocatalytic activity. Quenching and EPR experiments revealed that ·OH, ·O₂⁻, and ¹O₂ were generated, with ¹O₂ playing a dominant role in the degradation process. Furthermore, a possible electrocatalytic mechanism for the LOMH degradation was proposed. According to the DFT calculation and LC-MS result, three possible degradation pathways of LOMH were proposed. Additionally, the NiO/RM PEs maintained a LOMH removal efficiency of approximately 78% after five consecutive cycles, indicating excellent reusability and stability. Overall, this study not only achieves the value-added utilization of red mud but also provides an efficient, reusable, and sustainable solution for the treatment of antibiotic-contaminated wastewater.

本文采用简单的浸渍-煅烧法制备了红泥基NiO颗粒电极（NiO/RM PEs），并将其应用于三维电fenton （3DEF）体系中，用于降解盐酸洛美沙星（LOMH）。表征结果证实了NiO/RM pe的成功合成。在NiO/RM pe为5.32 g/L、电流密度为6.0 mA/cm2、曝气速率为4.0 L/min、初始pH为6.55、Na2SO4投加量为6.3 mmol的最佳反应条件下，LOMH去除率达到83.96%。电化学分析（CV和EIS）表明，NiO/RM pe具有较低的电荷转移阻力和较强的电催化活性。猝灭和EPR实验表明，降解过程中生成了·OH、·O2−和1O2，其中1O2在降解过程中起主导作用。进一步提出了一种可能的电催化降解LOMH的机理。根据DFT计算和LC-MS结果，提出了三种可能的LOMH降解途径。此外，NiO/RM pe在连续5次循环后仍保持约78%的LOMH去除效率，表明了出色的可重复使用性和稳定性。总体而言，本研究不仅实现了赤泥的增值利用，而且为抗生素污染废水的处理提供了高效、可重复使用、可持续的解决方案。

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引用次数: 0

CO2 desorption catalyzed by carboxyl-functionalized imidazolium ionic liquids: an effective strategy for energy-saving amine-based CO2 capture 羧基功能化咪唑离子液体催化CO2解吸：一种节能胺基CO2捕获的有效策略

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-02-08 DOI: 10.1016/j.ces.2026.123546

Xiaowen Zhang , Haiwei Xie , Yi Peng , Yang Luo , Shijian Lu , Peng Jiang , Siyan Ai , Fangfang Zhao , Kuiyi You , He’an Luo

Reducing the solvent regeneration energy consumption is crucial for the large-scale implementation of amine-based CO₂ capture technology. Herein, this study developed six carboxylic acid-functionalized imidazolium-based ionic liquid (IL) catalysts ([HOOCMIM][PF₆], [HOOCMIM][HSO₄], [HOOCMIM][BF₄], [HOOCMIM]₃PW₁₂O₄₀, [HOOCMIM]₃PMo₁₂O₄₀, and [HOOCMIM]₄SiW₁₂O₄₀), and applied them in catalytically regenerating the 5 M CO₂-loaded monoethanolamine (MEA) solution at 90 °C. All IL catalysts accelerated CO₂ desorption, with [HOOCMIM][PF₆] providing the highest catalytic activity. When the dosage was 2 wt%, [HOOCMIM][PF₆] improved the rate of CO₂ desorption by 200%, and increased the amount of released CO₂ by 221%. It also cut the regeneration energy requirement by 61.1%, demonstrating highly competitive energy efficiency for acid-catalyzed rich-MEA solution regeneration processes. The excellent efficiency of the [HOOCMIM][PF₆] catalyst may be explained by its high acidity and low viscosity. Stability tests over nine CO₂ absorption–desorption cycles indicated no significant deterioration, evidencing its robust stability. The CO₂ desorption mechanism of [HOOCMIM][PF₆] was explored using FT-IR and ¹³C NMR studies. Importantly, [HOOCMIM][PF₆] does not hinder CO₂ absorption in fresh amine solutions, eliminating the need for separating the IL from the amine system. Thus, the [HOOCMIM][PF₆]-amine system can be directly utilized as a new absorbent in existing CO₂ capture apparatus without the need for extra costs of device retrofitting, thereby facilitating broad application. This study presents a viable approach to reducing the energy demand and operational costs of CO₂ capture technology in practical applications.

降低溶剂再生能耗是大规模实施胺基CO2捕集技术的关键。本研究制备了6种羧酸功能化的咪唑基离子液体（IL）催化剂（[HOOCMIM][PF6]、[HOOCMIM][HSO4]、[HOOCMIM][BF4]、[HOOCMIM]3PW12O40、[HOOCMIM]3PMo12O40和[HOOCMIM]4SiW12O40），并将其应用于负载5 M co2的单乙醇胺（MEA）溶液在90℃下的催化再生。所有IL催化剂均能加速CO2的脱附，其中[HOOCMIM][PF6]的催化活性最高。当用量为2 wt%时，[HOOCMIM][PF6]使CO2解吸率提高200%，CO2释放量增加221%。它还将再生能源需求降低了61.1%，证明了酸催化的富mea溶液再生工艺具有高度竞争力的能源效率。[HOOCMIM][PF6]催化剂之所以具有优异的效率，可能是由于它具有高酸度和低粘度。经过9次二氧化碳吸收-解吸循环的稳定性测试表明，其没有明显的劣化，证明了其强大的稳定性。利用FT-IR和13C NMR研究了[HOOCMIM][PF6]的CO2解吸机理。重要的是，[HOOCMIM][PF6]不会阻碍新鲜胺溶液中的CO2吸收，从而消除了将IL从胺系统中分离出来的需要。因此，[HOOCMIM][PF6]-胺体系可以直接作为一种新的吸收剂在现有的CO2捕集装置中使用，而无需额外的设备改造成本，从而促进了广泛的应用。本研究提出了在实际应用中降低二氧化碳捕获技术的能源需求和运行成本的可行方法。

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引用次数: 0

Resource utilization of sulfate-rich membrane concentrates via electrosynthesis of peroxydisulfate 电合成过硫酸氢盐富硫酸盐膜精矿的资源利用

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science

Pub Date : 2026-05-15 Epub Date: 2026-02-11 DOI: 10.1016/j.ces.2026.123586

Liangjie Wang , Yi Zhou , Fengtao Zhao , Huanjing Zhang , Jinrui Shi , Lixuan Ma , Huifang Sun , Yi Xu , Huazhang Zhao

Developing an effective strategy for the high-value resource utilization of sulfate-rich membrane concentrates (SRMC) generated from wastewater reclamation remains a major challenge. This study demonstrates that the electrolysis of SRMC not only enables complete removal of organic pollutants but also permits the concurrent production of high-value peroxydisulfate (PDS). Using a fluorine-modified boron-doped diamond (BDD-F) electrode for PDS electrosynthesis, a 15 % higher Faraday efficiency was achieved compared to that of the pristine BDD electrode. The key intermediate for PDS formation was identified as HO•, and density functional theory calculations revealed that fluorine modification effectively suppresses the oxygen evolution reaction while promoting HO• generation. Approximately 230 mM of PDS was produced after 12 h of electrolysis, with the yield increasing linearly over time. When treating actual SRMC, complete organic mineralization was achieved within 5 h, accompanied by the production of ∼ 40 mM PDS. Notably, the PDS yield remained stable even after 15 cycles, indicating excellent electrode durability. The PDS derived from SRMC exhibited comparable performance in organic wastewater treatment to commercial one. These results confirm that electrolysis using a fluorine-modified BDD electrode represents a highly effective strategy for sulfate resource recovery from membrane concentrates.

开发一种有效的策略来高价值地利用废水回收产生的富硫酸盐膜精矿（SRMC）仍然是一个重大挑战。该研究表明，电解SRMC不仅可以完全去除有机污染物，而且可以同时生产高价值的过硫酸氢盐（PDS）。使用氟修饰的掺硼金刚石（BDD- f）电极进行PDS电合成，与原始BDD电极相比，法拉第效率提高了15%。确定了PDS形成的关键中间体是HO•，密度泛函理论计算表明氟改性有效抑制了析氧反应，同时促进了HO•的生成。电解12小时后，产生约230 mM的PDS，产量随时间线性增加。当处理实际的SRMC时，在5小时内实现了完全的有机矿化，同时产生了~ 40 mM的PDS。值得注意的是，即使经过15次循环，PDS产率仍保持稳定，表明极好的电极耐久性。SRMC衍生的PDS在有机废水处理中表现出与商业PDS相当的性能。这些结果证实，使用氟修饰的BDD电极进行电解是回收膜精矿中硫酸盐资源的一种非常有效的策略。

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引用次数: 0