Chemical Engineering and Processing - Process Intensification最新文献_第9页

Study of oxidation of lyocell fiber under different bleaching conditions 不同漂白条件下莱赛尔纤维氧化性能的研究

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-12 DOI: 10.1016/j.cep.2025.110628

Parv Pandya , Payal Tyagi , Satesh Sutar , Archana Unnikrishnan

Lyocell fibre, a regenerated cellulosic material valued for its mechanical strength and sustainability, requires bleaching to enhance whiteness and dyeability. This study investigated the oxidative behaviour of Lyocell under sodium hypochlorite bleaching by systematically varying concentration (0.01–0.05%), duration (1–5 min), temperature (30–60°C), and pH (5–10). A full factorial experimental design (2⁴, 32 runs) with ANOVA analysis was applied with model significance confirmed at p < 0.05 (R² > 0.95) to evaluate both main and interaction effects. The key indicators—intrinsic viscosity, copper number, whiteness index, tensile properties, and crystallinity (XRD)—were measured to quantify fibre oxidation and performance.

Results showed that pH strongly governed oxidation behaviour through HOCl/OCl⁻ speciation. Near-neutral pH caused higher viscosity loss and aldehyde formation due to increased HOCl activity, whereas alkaline pH moderated degradation. Concentration and temperature had the most significant effects on viscosity loss (p < 0.05), confirming their dominant role. The optimum condition (0.03 % NaOCl, 2–3 min, 45°C, pH 8.5) achieved about 28 % whiteness improvement while retaining over 85 % of original strength. XRD analysis confirmed a slight rise in crystallinity from selective removal of amorphous cellulose.

This study is among the first to apply factorial design to Lyocell bleaching, establishing a low-damage, statistically validated bleaching window that enhances whiteness with minimal oxidation and supports sustainable industrial application.

莱赛尔纤维是一种再生纤维材料，因其机械强度和可持续性而受到重视，需要漂白以提高白度和可染性。本研究通过系统地改变次氯酸钠漂白的浓度（0.01-0.05%）、持续时间（1-5分钟）、温度（30-60°C）和pH（5-10）来研究Lyocell的氧化行为。采用全因子实验设计（2⁴，32个试验）和方差分析，p < 0.05 （R²> 0.95）证实模型显著性，以评估主效应和交互效应。关键指标-特征粘度，铜数，白度指数，拉伸性能和结晶度(XRD) -被测量来量化纤维的氧化和性能。结果表明pH值通过HOCl/OCl毒血症对氧化行为有很强的控制作用。由于HOCl活性的增加，接近中性的pH值导致更高的粘度损失和醛的形成，而碱性pH值则减缓了降解。浓度和温度对粘度损失的影响最显著（p < 0.05），证实了它们的主导作用。最佳条件（0.03% NaOCl, 2-3 min, 45°C, pH 8.5）可使白度提高约28%，同时保持85%以上的原始强度。XRD分析证实，选择性去除无定形纤维素后，结晶度略有上升。本研究是第一个将析因设计应用于Lyocell漂白的研究，建立了一个低损伤、统计验证的漂白窗口，以最小的氧化提高白度，并支持可持续的工业应用。

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引用次数: 0

Turbulent collisions of inertial particles considering particle-particle interactions 考虑粒子-粒子相互作用的惯性粒子湍流碰撞

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-10 DOI: 10.1016/j.cep.2025.110622

Junwen Wang , Fang Zhang , Wei Cui , Jichao Lin , Jianchun Wang , Songying Chen , Guichao Wang

By comparing the one-way coupled point-particle method with an interaction-inclusive point-particle model, the differences were analyzed in the radial distribution function, radial relative velocity, and dynamic collision kernel under various turbulent kinetic energy dissipation rates and Stokes numbers. The findings reveal that considering inter-particle interactions leads to a more dispersed particle distribution, resulting in a lower and smoother radial distribution function compared to the one-way coupled approach. The dynamic collision kernel was found to be larger when inter-particle interactions were included, as more collision events were generated by these interactions.

The effects of particle size and density on collision statistics were investigated using the interaction-inclusive point-particle model. The results indicate that when the particle radius is 25 μm, the radial distribution function and dynamic collision kernel are maximized, while the radial relative velocity decreases as particle radius decreases. Notably, for all three particle sizes, the radial relative velocity reaches its peak at a Stokes number of approximately 1.5. The collision statistics were compared for three different particle densities under varying turbulence intensities, which indicates that the radial distribution function attains its highest value at a Stokes number of approximately 1.5, with the peak value for 5 g/cm³ particles exceeding that of 3 g/cm³ and 8 g/cm³ particles.

通过将单向耦合点粒子模型与包含相互作用的点粒子模型进行比较，分析了不同湍流动能耗散率和Stokes数下径向分布函数、径向相对速度和动态碰撞核的差异。研究结果表明，与单向耦合方法相比，考虑粒子间相互作用可以使粒子分布更加分散，从而使径向分布函数更小、更平滑。当考虑粒子间相互作用时，动态碰撞核更大，因为这些相互作用产生了更多的碰撞事件。采用包含相互作用的点-粒子模型研究了颗粒大小和密度对碰撞统计的影响。结果表明：当颗粒半径为25 μm时，径向分布函数和动态碰撞核最大，径向相对速度随颗粒半径的减小而减小；值得注意的是，对于所有三种粒径，径向相对速度在斯托克斯数约为1.5时达到峰值。对比了不同湍流强度下三种不同颗粒密度的碰撞统计量，发现径向分布函数在Stokes数约为1.5时达到最大值，5个 g/cm³颗粒的峰值超过了3 g/cm³和8 g/cm³颗粒的峰值。

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引用次数: 0

Isothermal fluidized-bed calcination of medium-sized limestone: Kinetics, phase evolution, and microstructural development 中型石灰石的等温流化床煅烧：动力学、相演化和微观结构发展

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-10 DOI: 10.1016/j.cep.2025.110626

Tong Chen , Xinran Zhu , Yanjun Li , Yuexin Han

Conventional limestone calcination is often linked to high carbon emissions, excessive energy use, and low product reactivity, posing challenges for sustainable lime production. This study investigates the isothermal fluidized-bed calcination of medium-sized limestone particles (260–520 µm) to elucidate the decomposition mechanism and enhance product quality. Experiments at 850–1100 °C with real-time CO₂ monitoring determined the apparent activation energy using the model-free Friedman method and integral kinetic modeling. Phase composition, microstructure, and pore characteristics were examined by XRD, SEM, and BET analyses. Increasing calcination temperature from 850 to 1000 °C reduced the complete decomposition time from 1800 s to 600 s, identifying 1000 °C as an effective threshold for rapid and stable conversion. Kinetic analysis confirmed a random nucleation and growth mechanism (A_3/2) with an average apparent activation energy of 77.67 kJ/mol, closely matching the isoconversional results. The fluidized-bed process produced a highly porous, uniform product with BET surface areas up to 19.62 m²/g and pore volumes of 0.3286 cm³/g, far exceeding those from conventional fixed-bed calcination. This well-developed pore network is expected to enhance gas–solid contact and heat transfer, which plausibly contributes to accelerated decomposition and improved reactivity. These findings demonstrate the potential of fluidized-bed calcination as a promising route to energy-efficient production of porous lime with favorable textural properties.

传统石灰石煅烧通常与高碳排放、过度能源使用和低产品反应性有关，对可持续石灰生产提出了挑战。本研究对中型石灰石颗粒（260 ~ 520µm）进行等温流化床煅烧，以阐明分解机理，提高产品质量。850-1100℃下实时CO2监测实验采用无模型Friedman方法和积分动力学建模确定表观活化能。采用XRD、SEM、BET等分析手段对其相组成、微观结构和孔隙特征进行了表征。将煅烧温度从850℃提高到1000℃，将完全分解时间从1800 s减少到600 s，确定1000℃是快速稳定转化的有效阈值。动力学分析证实了其随机成核生长机制（A3/2），平均表观活化能为77.67 kJ/mol，与等转化结果基本吻合。流化床工艺制得的产品孔隙度高、均匀，BET比表面积高达19.62 m2/g，孔体积为0.3286 cm3/g，远远超过常规固定床煅烧的产品。这种发育良好的孔隙网络有望增强气固接触和传热，这可能有助于加速分解和提高反应性。这些发现表明，流化床煅烧是一种具有良好结构性能的高效多孔石灰生产的有前途的途径。

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引用次数: 0

Design of a modified dividing wall column for the application in the onshore LNG fractionation process of a natural gas liquefaction plant 天然气液化厂陆上LNG分馏工艺中改进的分壁塔设计

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-10 DOI: 10.1016/j.cep.2025.110627

El Houaria Zeboudj , Hassiba Benyounes , Ilies Tebbiche

As a part of the industrial process, dividing wall columns have become relatively one of the most widespread intensified separation technologies used in the petrochemical and chemical industries, conceived to reduce energy consumption and capital investment. In this work, two types of dividing wall distillation columns (DWC) have been proposed: a top-DWC and a modified full DWC designed to replace a deethanizer and depropanizer in a conventional fractionation unit applied for a hydrocarbon separation mixture. The goal of this work is to identify the most sustainable and efficient DWC column by minimizing the cooling medium demands. A shortcut method was implemented to define the initial design parameters of the two DWC columns required for a rigorous simulation using Aspen Hysys V14. The best operating parameters that satisfy the industrial products' purity and recovery ratio requirements were determined for both configurations of DWC columns. Through the thermodynamic efficiency and economic analysis, a modified full DWC was identified as the most suitable configuration for replacing a conventional deethanizer and depropanizer. This configuration offers a higher exergy efficiency, achieves lower operational cost, and contributes to a reduction in carbon dioxide emissions for the industrial application of the onshore LNG fractionation process.

作为工业过程的一部分，分隔墙柱已成为石化和化学工业中应用最广泛的强化分离技术之一，旨在降低能耗和资本投资。在这项工作中，提出了两种类型的分壁精馏塔（DWC）：顶壁精馏塔和改进的全壁精馏塔，旨在取代用于碳氢化合物分离混合物的传统分馏装置中的deethanizer和depropanizer。这项工作的目标是通过最大限度地减少冷却介质的需求来确定最可持续和最有效的DWC塔。实现了一种快捷方法来定义两个DWC柱的初始设计参数，这些参数是使用Aspen Hysys V14进行严格模拟所需的。确定了两种结构的DWC塔的最佳操作参数，以满足工业产品的纯度和回收率要求。通过热力学效率和经济分析，确定了一种改进的全DWC是取代传统脱丙烷器和脱烷器的最合适配置。这种配置提供了更高的能源效率，实现了更低的运营成本，并有助于减少二氧化碳的排放，为陆上液化天然气分馏过程的工业应用做出贡献。

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引用次数: 0

Biogas upgrading in a pilot scale rotating packed bed absorber 中试规模旋转填料床吸收器沼气升级

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-09 DOI: 10.1016/j.cep.2025.110625

J. Salinero, Luz M. Gallego Fernández, E. Portillo, B. Navarrete, L.F. Vilches

Biogas upgrading is typically carried out using chemical absorption in conventional packed columns. However, its high energy consumption and limited profitability highlight the need for alternative technologies. The Rotating Packed Bed (RPB) absorber could be a promising alternative, as it improves mass transfer, reduces size and energy consumption, and resists flooding more effectively. Given that RPB absorbers have not yet been experimentally applied to biogas upgrading, this work addresses this gap by first characterizing a pilot-scale unit using simulated biogas (39 %_v/v CO₂ in N₂) and sodium hydroxide as the absorbent. Them, 11 Nm³/h of synthetic biogas (36 %_v/v CO₂ in CH₄ and other trace gases) is upgraded using the optimized working conditions obtained from this characterization. Characterization tests assess CO₂ removal efficiency based on rotational speed (300 - 2400 rpm) and absorbent concentrations (1 M and 2 M), treating 10.7 Nm³/h of simulated biogas with 0.19 m³/h (2 M) and 0.38 m³/h (1 M) of absorbent solution. Results show that increasing rotational speed reduces CO₂ concentration, reaching a minimum of 2.1 %_v/v at 1800 rpm with 96.7 % removal efficiency. Between 600 rpm and 2400 rpm, outlet CO₂ concentrations meet the requirements for fuel and grid application. Biogas upgrading achieves 95.1 % efficiency with 2.9 % CO₂ concentration, with a height of a transfer unit (HTU) an order of magnitude lower than in conventional packed beds. Finally, data reliability and RPB performance are validated by sodium and carbon mass balances, with discrepancies up to 15 % and between 6 % and 21 %, respectively.

沼气升级通常是在传统填料塔中使用化学吸收进行的。然而，它的高能耗和有限的盈利能力突出了对替代技术的需求。旋转填充床（RPB）吸收器可能是一种很有前途的替代方案，因为它可以改善传质，减小尺寸和能耗，并更有效地抵抗水浸。考虑到RPB吸收剂尚未在实验中应用于沼气升级，本工作通过首先使用模拟沼气（N2中二氧化碳浓度为39% v/v）和氢氧化钠作为吸收剂来描述中试规模装置的特征，从而解决了这一空白。其中，11 Nm3/h的合成沼气（36% v/v CO2在CH4和其他微量气体中）使用从该表征中获得的优化工作条件进行升级。表征试验根据转速（300 - 2400 rpm）和吸收剂浓度（1 M和2 M）评估CO2去除效率，以0.19 m3/h （2 M）和0.38 m3/h （1 M）的吸收剂溶液处理10.7 Nm3/h的模拟沼气。结果表明，增加转速可降低CO2浓度，在1800转/分时，CO2浓度最低可达2.1% v/v，去除率为96.7%。在600 rpm和2400 rpm之间，出口二氧化碳浓度满足燃料和电网应用的要求。沼气升级效率为95.1%，二氧化碳浓度为2.9%，传输单元（HTU）的高度比传统填料床低一个数量级。最后，通过钠和碳质量平衡验证数据可靠性和RPB性能，差异分别高达15%和6%至21%。

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引用次数: 0

CFD evaluation of a microchannel reactor for ammonia synthesis using a Ruthenium-based catalyst 基于钌基催化剂的氨合成微通道反应器的CFD评价

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-08 DOI: 10.1016/j.cep.2025.110624

Leonardo Bravo , Camilo Rengifo Gutierrez , Martha Cobo , Manuel Figueredo

This work evaluates the potential of microchannel reactors (MCR) for ammonia synthesis using ruthenium-based catalysts through computational fluid dynamics (CFD) modelling. A comprehensive CFD framework was developed that integrates mass and energy balances with modified Temkin-Pyzhev kinetics, and validated against experimental data from a packed-bed reactor (PBR) with <5 % error. The validated model was then applied to MCR configurations to assess the influence of operating conditions and reactor geometry. Results show that MCRs achieve up to 165 % higher ammonia productivity than PBRs under optimal conditions (100 bar, 430 °C), owing to the enhanced heat and mass transfer. Parametric studies identified temperature as the most critical operating parameter, while pressure had a secondary effect. Furthermore, increasing the catalytic layer thickness improved ammonia yields, although there are potential mass-transfer limitations. These findings demonstrate that MCRs can provide significant energy-efficiency gains and support decentralised ammonia production, highlighting their promise as a sustainable alternative to conventional Haber-Bosch technology.

本工作通过计算流体动力学（CFD）模型评估了微通道反应器（MCR）使用钌基催化剂合成氨的潜力。开发了一个综合的CFD框架，将质量和能量平衡与改进的Temkin-Pyzhev动力学集成在一起，并根据填充床反应器（PBR）的实验数据进行了验证，误差为<； 5%。然后将验证模型应用于MCR配置，以评估操作条件和反应堆几何形状的影响。结果表明，在最佳条件下（100 bar, 430°C），由于传热传质增强，mcr的氨产率比pbr高165%。参数研究确定温度是最关键的操作参数，而压力具有次要影响。此外，增加催化层厚度提高了氨收率，尽管存在潜在的传质限制。这些发现表明，mcr可以显著提高能源效率，并支持分散的氨生产，突出了它们作为传统Haber-Bosch技术的可持续替代品的前景。

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引用次数: 0

An investigation of conservation of fluid oscillation in a continuous oscillatory baffled reactor 连续振荡折流板反应器中流体振荡守恒的研究

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-08 DOI: 10.1016/j.cep.2025.110621

Qi Feng Chan, Alexander Riddell, Calum Selman, Jianyu Wang, Rohen Prinsloo, Xiong-Wei Ni

Continuous oscillatory baffled reactors (COBRs) have been utilised in organic synthesis and crystallisation, however, no validation work has yet been conducted to determine if the fluid displacement caused by the oscillation at the start of the COBR is conserved at the end of the COBR. This work reports, for the first time, both experimental measurements and theoretical evaluations of the displacement. The experimental validation involves physically measuring the fluid displacement using a laser distance sensor located at the end of the COBR. Surprisingly, the measured displacement values at some operating conditions differ from the initial settings. The theoretical evaluation entails the determination of power dissipation across the COBR using the pressure measurements at four locations along the COBR. The model evaluated displacements agree well with the experimental measurements at all operational conditions, validating the methodologies used in this work.

连续振荡折流板反应器（COBR）已用于有机合成和结晶，但尚未进行验证工作，以确定在COBR开始时振荡引起的流体位移在COBR结束时是否守恒。这项工作首次报道了位移的实验测量和理论评估。实验验证包括使用位于COBR末端的激光距离传感器对流体位移进行物理测量。令人惊讶的是，在某些操作条件下的测量位移值与初始设置不同。理论评估需要使用沿COBR四个位置的压力测量来确定整个COBR的功耗。模型评估的位移与所有操作条件下的实验测量结果一致，验证了本工作中使用的方法。

引用次数: 0

Ultrasound-assisted upcycling of thermal transfer ink ribbons into purified terephthalic acid and carbon black 超声辅助下热转印油墨带升级回收成纯化对苯二甲酸和炭黑

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-08 DOI: 10.1016/j.cep.2025.110619

Lokesh Mekala , Kathula Naresh , Vikas Choudhary , Radha Kumari Muktham , Alka kumari , Vineet Aniya

In the present study, the recycling of waste generated from thermal-sensitive transfer ink ribbons (TTR) is investigated to produce purified Terephthalic acid (TPA) and Carbon black (CB). Utilizing an ultrasound-assisted method, the process depolymerizes the Polyethylene Terephthalate (PET Film) in the ribbons into TPA via NaOH-catalyzed hydrolysis. From the preliminary solvent system screening, DCM-Methanol showed the highest yield and purity of TPA among xylene, chloroform, acetone, and tetrahydrofuran, combined with methanol and ethanol. A three-level Box-Behnken design (BBD) is adopted to optimize the alkaline hydrolysis reaction conditions (solvent weight ratio, catalyst wt.%, and time) to achieve maximum yield and purity. The experimental data closely matched predicted outcomes, producing significant quadratic models with high R² values (>0.99). The maximum yield (94.9 %) and purity (99.7 %) of TPA are observed at DCM-Methanol wt. ratio of 70:30, catalyst 5 wt.%, and reaction time of 12.5 min at 45 °C, and a solid-liquid ratio of 1:10. The CHNS analysis of recovered carbon black from TTR showed, before purification, 79.37 % and after purification, 88.03 % C content. Further, the evaluation of the energy economy factor and environmental energy impact factor of the proposed investigation demonstrated the ability of the method to turn TTR waste into valuable resources.

在本研究中，研究了热敏转移油墨带（TTR）产生的废物回收利用，以生产纯化的对苯二甲酸（TPA）和炭黑（CB）。该工艺利用超声辅助方法，通过naoh催化水解将带中的聚对苯二甲酸乙二醇酯（PET膜）解聚为TPA。从溶剂体系的初步筛选来看，在二甲苯、氯仿、丙酮和四氢呋喃中，dcm -甲醇与甲醇和乙醇结合，TPA的收率和纯度最高。采用三阶Box-Behnken设计（BBD）优化碱水解反应条件（溶剂质量比、催化剂wt.%、时间），以获得最大收率和纯度。实验数据与预测结果密切匹配，产生显著的二次模型，R2值高（>0.99）。在dcm -甲醇质量比为70:30、催化剂质量比为5 wt.%、反应时间为12.5 min、料液比为1:10的条件下，TPA的收率为94.9%，纯度为99.7%。对TTR回收的炭黑进行CHNS分析，纯化前碳含量为79.37%，纯化后碳含量为88.03%。此外，本研究的能源经济因子和环境能源影响因子的评价表明，该方法能够将TTR废物转化为有价值的资源。

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引用次数: 0

Enhanced oxygen stripping in sieve tray columns: Role of top-feed configuration and CFD model validation 在筛板塔中增强氧剥离：顶部进料配置的作用和CFD模型验证

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-08 DOI: 10.1016/j.cep.2025.110623

Shijie Zhang , Xiao Xu , Qiang Yang , Hualin Wang

This study investigates the enhancement of oxygen stripping efficiency in sieve tray columns through the implementation of a top-feed configuration, validated by Computational Fluid Dynamics (CFD) simulations. The dissolution of oxygen from water via nitrogen stripping was examined experimentally and numerically under two distinct liquid inlet modes: side and center inlet. Two Euler–Euler CFD models were compared: a Population Balance Model (PBM) and a Mixture Model. The results demonstrate that the center inlet mode achieves a more uniform and symmetric liquid distribution, leading to a 20-30 % greater reduction in outlet dissolved oxygen concentration compared to the conventional side inlet mode. The Mixture Model achieved superior predictive accuracy, with deviations of 10 % and 20 % for the side and center inlet modes, compared to 20 % and 45 % for the PBM. The mixture model more accurately captures the enhanced mass transfer in the center inlet mode, as demonstrated by contour plots of liquid holdup, interfacial area, volumetric mass transfer coefficient, and mass transfer flux. The findings provide a validated CFD strategy and a practical guideline for optimizing the design of industrial stripping equipment, recommending the adoption of the center inlet configuration coupled with the mixture model for simulation.

本研究通过计算流体动力学（CFD）模拟验证了通过顶部进料配置对筛板塔氧溶出效率的提高。在侧面和中心两种不同的进液方式下，对氮气汽提对水中氧的溶解进行了实验和数值研究。比较了两种Euler-Euler CFD模型：种群平衡模型（PBM）和混合模型（Mixture Model）。结果表明，与传统的侧边进口模式相比，中心进口模式实现了更均匀对称的液体分布，使出口溶解氧浓度降低了20- 30%。混合气模型的预测精度更高，侧边和中心进气模式的偏差分别为10%和20%，而PBM的偏差分别为20%和45%。从液含率、界面面积、体积传质系数和传质通量的等高线图可以看出，混合模型更准确地捕捉到了中心入口模式下的强化传质。研究结果为工业汽提设备的优化设计提供了行之有效的CFD策略和实用指南，建议采用中心进气道配置和混合模型进行仿真。

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引用次数: 0

Optimization of ultrasonic synergistic reducing agent leaching of zinc and germanium in zinc leaching residue by response surface method 响应面法优化浸锌渣中锌锗超声协同还原剂浸出效果

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification

Pub Date : 2025-11-08 DOI: 10.1016/j.cep.2025.110620

Jie Wei , Hongying Xia , Qifei Pei , Yingjie Xu , Wang Chun , Linqing Dai , Libo Zhang

Zinc leaching residue, containing valuable zinc and germanium, poses challenges for efficient recovery due to its stable ZnFe₂O₄ phase. This study developed an ultrasonic-assisted tartaric acid leaching process optimized using response surface methodology (Box–Behnken design). The effects of temperature, liquid-to-solid ratio, and ultrasonic power were systematically investigated, and a regression model with high predictive accuracy (R² = 0.9956) was established. The optimal conditions were 90 °C, 9 mL/g, and 300 W, under which the leaching efficiencies of zinc and germanium reached 82.94 % and 85.47 %, representing increases of 8.8 % and 14.78 % over conventional acid leaching. Characterization (XRD, SEM, XPS) confirmed that ultrasound-enhanced ZnFe₂O₄ breakdown and increased reactive surface area. This work provides an efficient and environmentally friendly approach for the recovery of critical metals from zinc leaching residues.

锌浸渣含有有价锌和锗，由于其稳定的ZnFe₂O₄相，对有效回收提出了挑战。本研究采用响应面法（Box-Behnken设计）对超声辅助酒石酸浸出工艺进行了优化。系统考察了温度、液固比、超声功率等因素的影响，建立了预测精度较高的回归模型（R²= 0.9956）。在90℃、9 mL/g、300 W条件下，锌和锗的浸出率分别达到82.94%和85.47%，分别比常规酸浸提高8.8%和14.78%。表征（XRD， SEM， XPS）证实超声波增强了ZnFe₂O₄的击穿，增加了反应表面积。本研究为从锌浸渣中回收关键金属提供了一种高效、环保的方法。

引用次数: 0