Separation and Purification Technology最新文献

{"title":"High-efficiency separation of Pd from high-level liquid waste by a novel silica-based sorbent modified with polybenzimidazole","authors":"Zhiliang Ma, Chao Xie, YueZhou Wei, Xiangbiao Yin, Caiwu Luo, Shunyan Ning, Qiang Wu, Tianjiao Jiang","doi":"10.1016/j.seppur.2025.133401","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133401","url":null,"abstract":"The efficient separation and recovery of palladium (Pd) from high-level liquid waste (HLLW) are critical for promoting resource sustainability and advancing the nuclear fuel cycle. In this study, a novel silica-based sorbent (HT-paPBI@SiO₂) enriched with nitrogen adsorption sites was synthesized via a polymerization–vacuum impregnation–high-temperature optimization strategy to address the challenges of Pd(II) recovery in highly acidic and ionically complex environments. HT‑paPBI@SiO₂ was systematically characterized using SEM, EDS, TG‑DSC, BET, and FT‑IR analyses, which confirmed its rigid framework, abundant porosity, high loading efficiency, and excellent thermal stability. Static batch adsorption experiments demonstrated that HT‑paPBI@SiO₂ efficiently adsorbs Pd(II) over a broad acidity range (0.1–9 M HNO₃). In simulated HLLW at 6 M HNO₃, the material exhibited outstanding selectivity (<em>SF</em>_{Pd/other metal ions} &gt; 1.05 × 10³) and a high saturation adsorption capacity of 128.2 ± 1.8 mg/g. Furthermore, the adsorption kinetics fit well with a pseudo‑second‑order model, while the equilibrium data conform to the Langmuir isotherm and van’t Hoff thermodynamic models, indicating a spontaneous, endothermic, monolayer chemical adsorption process. Furthermore, dynamic adsorption experiments successfully achieved the selective recovery of Pd(II) from simulated HLLW, highlighting the potential of HT-paPBI@SiO₂ for industrial-scale applications. Mechanistic investigations, supported by FT-IR, XPS, and DFT calculations, revealed that the benzene ring in paPBI was oxidized to a quinone structure under high-temperature treatment. The electron-rich regions resulting from the interaction of the C=O group in quinone with the C=N − C moiety in imidazole enhance the affinity for Pd(II). This interaction facilitates the coordination of nitrogen and oxygen atoms with Pd(II), while NO₃⁻ ions coordinate to balance the charge.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"20 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling of fluid dynamics in wiped film evaporators during evaporation","authors":"David Appelhaus, Katharina Jasch, Michel Groth, Stephan Scholl","doi":"10.1016/j.seppur.2025.132840","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132840","url":null,"abstract":"This study aims to model and predict the operating behavior of wiped film evaporators with roller wipers. A modular model has been formulated in the modeling language Modelica. The established model considers heat transfer, evaporation, fluid dynamics, and residence time behavior. It is parametrized only on the basis of operational and geometrical parameters, which makes it fully predictive. The apparatus is discretized into a series of height elements with local calculation of fluid properties, heat transfer and fluid volumes. Different heat transfer models were considered for the product side, resulting in a deviation of approximately &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mo is=\"true\"&gt;&amp;#xB1;&lt;/mo&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"1.971ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -747.2 778.5 848.5\" width=\"1.808ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMAIN-B1\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mo is=\"true\"&gt;±&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;mo is=\"true\"&gt;±&lt;/mo&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt; 25% for the simulated heat flow. The mean residence time can be predicted with &lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mo is=\"true\"&gt;&amp;#xB1;&lt;/mo&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"1.971ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -747.2 778.5 848.5\" width=\"1.808ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMAIN-B1\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mo is=\"true\"&gt;±&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;mo is=\"true\"&gt;±&lt;/mo&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt; 40% compared to experimental results for medium to high flow rates and moderate evaporation ratios. The shape of the simulated residence time distributions generally matches well with the experimental data. Greater deviations at higher evaporation ratios were attributed to possible de-wetting of the heated surface. The model can be used to predict the influence of the main operational parameters and provides a good basis for the design and re-evaluation of wiped film evaporators. Furthermore, it allows valuable insights into the underlying physics of wiped film evaporators. The model may also be adapted to other wiper geometries by modifying some of the included empiric","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"56 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calcium-based dual-functional materials for integrated CO2 capture and reverse water gas shift: Boosting stored CO2 hydrogenation via dispersed MgO-CaCO3 interfaces","authors":"Xinlin Xie,&nbsp;Lei Liu,&nbsp;Hanzi Liu,&nbsp;Zhiqiang Sun","doi":"10.1016/j.seppur.2025.133384","DOIUrl":"10.1016/j.seppur.2025.133384","url":null,"abstract":"<div><div>The chemical looping principle of integrated CO₂ capture and hydrogenation has shown promise for streamlining carbon capture processes and reducing energy consumption. However, the practical application is hindered by the kinetic limitations of dual functional materials (DFMs). In this work, we investigated the synergistic effect of the magnesium-calcium interface to enhance CO₂ capture and RWGS performance under ideal feed gas conditions (CO₂ in Argon without steam or oxygen). By fine-tuning the Mg-to-Ca ratio, Mg_0.12Ca_0.36CO₃ exhibited an eightfold improvement in integrated CO production compared to conventional CaO, reaching 9.54 mmol g⁻¹ at 650 °C. Experimental results and mechanistic studies revealed that the incorporation of Mg not only enhanced the stability of the carbonate lattice during the reverse water–gas shift reaction but also facilitated efficient CO₂ hydrogenation by strengthening the basic sites. The interfacial sites effectively activate the stored CO₂, promoting the formation of HCOO* intermediates and their subsequent conversion to CO via deoxygenation. Theoretical calculations provided further insights into the superiority of the MgO-CaCO₃ interface for activating stored CO₂, demonstrating stable CO₂ adsorption and low H₂ dissociation barriers at the interface. These findings highlight the potential of strategically incorporating Mg into CaCO₃-based DFMs as a viable approach to enhance the stability and efficiency of integrated CO₂ capture and hydrogenation in real-world applications.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"371 ","pages":"Article 133384"},"PeriodicalIF":8.1,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decoupling analysis for advanced electrochemical ceramic oxygen pumps","authors":"Shuang Sun, Xiaoyu Wang, Wanqing Chen, Zeping Chen, Yichen Wei, Wei Wang, Chuan Zhou, Wei Zhou","doi":"10.1016/j.seppur.2025.133317","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133317","url":null,"abstract":"Ceramic oxygen pumps (COPs) have demonstrated significant advantages in continuous high-purity oxygen production by integrating electrochemical reactions and separation within oxygen-permeable membrane reactors. However, their industrial application remains constrained by the lack of highly active electrodes at temperatures below 750 °C. In this study, we developed a three-electrode structure to decouple the electrodes for analyzing the performance evolution of the COPs under different atmospheric conditions. Through rigorous <em>in situ</em> decoupling tests of diverse electrodes, a comprehensive analysis of impedance data revealed that the resistance of the oxygen evolution reaction (OER) process in pure oxygen is predominantly attributed to the ion diffusion process of the electrode. Meanwhile, the resistance of the oxygen reduction reaction (ORR) on the air side is attributable to both the surface gas absorption and bulk ion transport processes. Furthermore, an electrolyte (200 μm) supported COPs was constructed using the preferred cathode Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ and anode SrCo_0.8Nb_0.1Ta_0.1O_3-δ. This COP achieves a high current density of 1956 mA cm⁻²@0.6 V at 750 °C and maintained excellent operating stability over 144 h.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"7 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143901426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From waste to functional Material: Recycling High-Impact polystyrene (HIPS) with clove extract for air filtration media with antibacterial activity","authors":"Akmal Zulfi, Jasmine Cupid Amaratirta, Ratih Amalia, Fitri Yola Amandita, Swasmi Purwajanti, , Muhammad Miftah Jauhar, Elsy Rahimi Chaldun, Handy Chandra, Yulianto Agung Rezeki, Alfian Noviyanto, Muhammad Miftahul Munir","doi":"10.1016/j.seppur.2025.133252","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133252","url":null,"abstract":"The extensive use of plastics, particularly High-Impact Polystyrene (HIPS), has resulted in significant waste accumulation, with low recycling rates posing a serious environmental challenge. Simultaneously, the degradation of air quality due to fine particulate matter (PM_2.5), which increased health risks, and the limitations of commercially masks without antibacterial activity that could only be used for a few hours, led to the development of more efficient air filtration solutions and increased the lifetime of masks. In this study, nanofiber membranes based on recycled High-Impact Polystyrene (HIPS) with the addition of clove extract were successfully synthesized using the electrospinning method. Various concentrations of clove extract (0 %, 1 %, 3 %, and 5 %) were incorporated to investigate their effects on fiber morphology, membrane properties, and performance. SEM analysis showed that the average fiber diameter decreased as the clove extract concentration increased, but uniformity declined, as indicated by higher coefficients of variation (CV). XRD analysis confirmed an amorphous structure, while FTIR and Raman spectroscopy indicated the integration of the extract without residual solvent. Contact angle measurements confirmed that all membranes exhibited hydrophobic characteristics. The HC5 membrane (5 % clove extract) demonstrated antibacterial activity against Staphylococcus aureus and Escherichia coli and exhibited comparable performance to Chloramphenicol against Pseudomonas aeruginosa in growth kinetic tests. Filtration tests showed that fiber morphology significantly influenced performance. The HC5 membrane exhibited a low-pressure drop (7.40 Pa) but had limited filtration efficiency (52.66 %) due to uneven fiber distribution and large pore size variations. However, optimizing the electrospinning duration enhanced filtration efficiency, achieving 99.95 % efficiency after 5 h, meeting FFP3/N99 standards. These findings demonstrate the potential of recycled HIPS nanofiber membranes with clove extract as a sustainable and effective air filtration solution.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"48 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143901424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced phosphorus recovery from incinerated sewage sludge ash as vivianite through calcination with sodium-based additives","authors":"Zhijia Fu ,&nbsp;Xiaoyuan Zheng ,&nbsp;Yuheng Feng ,&nbsp;Zhi Ying ,&nbsp;Bo Wang","doi":"10.1016/j.seppur.2025.133377","DOIUrl":"10.1016/j.seppur.2025.133377","url":null,"abstract":"<div><div>Phosphorus (P) recovery from Incinerated Sewage Sludge Ash (ISSA) is a promising way to alleviate P shortage concerns. An enhanced P recovery strategy from ISSA through calcination, water leaching, and crystallization was proposed to obtain high value-added vivianite. The influence of sodium-based additives (NaCl, NaOH, Na₂CO₃, and NaHCO₃), calcination temperature (700∼1000 °C), additives dosage, and residence time on the P transformation was examined with theoretical and experimental approaches. The effect of filtrate recirculation on the vivianite crystallization was further assessed for water conservation. Results indicate that alkaline sodium-based additives (NaOH, Na₂CO₃, and NaHCO₃) and elevated calcination temperature facilitate the conversion of apatite phosphorus (AP) and non-apatite inorganic phosphorus (NAIP) into water-soluble P (H₂O-P) as Na₃PO₄. At 1000 °C, the conversion of AP to water-insoluble CaNaPO₄ is observed. The highest proportion of H₂O-P to total phosphorus (TP) of 90.53 % is yielded. The optimal P leaching rate from calcined ISSA reaches 90.12 % at 50 % NaHCO₃ dosage, 800 °C, and 60 min. Following the purification and crystallization of P-rich leachate, the vivianite product is collected with a typical flower-like morphology and practical Fe/P molar ratio of 1.40. The influence of filtrate recirculation on the P recovery rate from the leachate is negligible. The proposed strategy can yield the highest total P recovery rate of 78.03 % from ISSA. This study provides an appealing way to recover P from ISSA as high value-added vivianite.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"371 ","pages":"Article 133377"},"PeriodicalIF":8.1,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143901430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A membrane cascade for size-based separation and concentration of nanoplastics in environmental waters","authors":"Marie Arnould, Rosana Quingongo, Magali Albignac, Alexandra ter Halle, Patrice Bacchin, Christel Causserand","doi":"10.1016/j.seppur.2025.133352","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133352","url":null,"abstract":"The presence of nanoplastics (NP) in freshwater and seawater is a growing environmental concern, although little is known about their amount, structure or behaviour associated with natural organic matter (NOM). While efforts have been made to isolate them, previous protocols were not able to minimize losses during extraction, preventing reliable characterization. Additionally, NP size fractionation, crucial for understanding of their transport dynamics and toxicity, remains challenging. This study presents a new protocol using a cascade of microfiltration (MF) membranes to i) extract NP from natural waters, ii) separate them by size range, iii) concentrate each fraction, iv) maximize recovery rates. Filtration experiments were performed using fluorescent polystyrene nanoplastics (PS NPs) of various sizes to account for the size polydispersity of environmental NP and evaluate membrane selectivity. Coupled with comprehensive membrane characterization and fouling models, the results showed that cascading a 2 µm stainless steel grid, a 0.45 µm PVDF membrane and a 0.1 µm PES membrane successfully allowed to separate NP into three size ranges (&lt; 50 nm; 50–500 nm; 50–2000 nm), while achieving repeatable recoveries of 52 % for 500 nm PS NPs, 95 % for 200 nm PS NPs and 93 % for 50 nm PS NPs. The cascade was also tested on real river water doped with PS NPs: selectivity and recovery of all size fractions could be maintained for NOM concentrations of 0.11–0.54 mg/L. The development of this filtration cascade will serve as a foundation for efficient extraction of environmental NP, and unveils new knowledge about the use of MF membranes in this prospect.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"30 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143901427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and selenium vacancy-induced catalytic enhancement of CoSe2 for efficient electrocatalytic nitrate reduction","authors":"Shuoshuo Feng ,&nbsp;Jie Liu ,&nbsp;Xiaoyu Chen ,&nbsp;Kai Wu ,&nbsp;Fanghua Ning ,&nbsp;Jin Yi ,&nbsp;Yuyu Liu","doi":"10.1016/j.seppur.2025.133373","DOIUrl":"10.1016/j.seppur.2025.133373","url":null,"abstract":"<div><div>The electroreduction of nitrate (NO₃RR) offers an environmentally friendly alternative to the Haber-Bosch process for ammonia (NH₃) synthesis. However, the complex reaction pathway and diverse product distribution pose challenges to achieving efficient NH₃ synthesis. Therefore, the rational design and preparation of high-performance electrocatalysts are crucial for the degradation of NO₃RR. In this study, a selenium vacancy-engineered CoSe₂ supported on carbon felt (CoSe_v/CF) was synthesized via a hydrothermal method. The nanostructure, the interaction between Se and Co, and the formation of selenium vacancies contribute to the generation of abundant active sites, modulation of the electronic structure, and enhancement of substrate adsorption. Consequently, CoSe_v/CF exhibits excellent electrocatalytic performance for NO₃RR. As a result, the CoSe_v/CF catalyst demonstrates a remarkable Faraday efficiency (FE) for ammonia synthesis, achieving a value of 98.62 %, with an exceptionally high ammonia production rate of 4.63 m g·h⁻¹ cm⁻² in a solution comprising 0.1 M Na₂SO₄ and 0.1 M NaNO₃ at a potential of − 0.8 V relative to the reversible hydrogen electrode (RHE).</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"371 ","pages":"Article 133373"},"PeriodicalIF":8.1,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143901431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A mechanistic process model for aqueous two-phase flotation: Insights into enzyme transport mechanisms","authors":"Kim Carina Lohfink, Hermann Nirschl, Frank Rhein","doi":"10.1016/j.seppur.2025.133100","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133100","url":null,"abstract":"Continuous aqueous two-phase flotation (ATPF) is an alternative downstream approach for the selective separation of enzymes from complex biosuspensions. Until now, mass transport across the phase interface has been assumed to be mainly due to accumulation of enzymes on the surface of rising gas bubbles (flotation), while theoretical studies are lacking. This work presents a mechanistic compartment model of the ATPF process that that also includes mass transport by extraction, i.e. diffusion across the phase interface. The model is validated with ATPF experiments over a wide range of process parameters and reliably predicts the process behavior. The results indicate that extraction accounts for more than 80% of the integral mass transfer, while bubbles are still essential for phase mixing and the creation of a large interfacial area. Therefore, the proposed process model provides valuable insights into the enzyme transport mechanisms and enables future developments such as model predictive control.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"31 1","pages":"133100"},"PeriodicalIF":8.6,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143901425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of surface lattice Co-O bonds and interfacial interaction between CuO and Co3O4 in Cu-modified Co3O4 on catalytic complete oxidation of toluene and acetone","authors":"Yao Li, Xiaoyu Niu, Yujun Zhu","doi":"10.1016/j.seppur.2025.133316","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133316","url":null,"abstract":"Modifying the electronic structure of Co₃O₄ and enhancing the rapid cycling ability between Co²⁺ and Co³⁺ are effective strategies to improve the catalytic oxidation of VOC by Co-based catalysts. The ionic radius of Cu is similar to that of Co, and the valence state of Cu is variable. Therefore, Cu_aCoO_x catalysts with varying Cu/Co molar ratios were synthesized through the hydrothermal method, followed by a comprehensive assessment of their oxidation performance for toluene and acetone degradation. Among them, Cu_0.55CoO_x can convert 90 % acetone and toluene at 169 and 217 °C (T₉₀), respectively, but it shows quickly deactivation in the long-term activity stability test. Through controlled variation of the Cu/Co molar ratio, the amount of metal ions incorporated into Co₃O₄ varies, which influences the electronic structure of the catalyst. Compared with Cu_0.55CoO_x, T₉₀ values over Cu_0.18CoO_x are177 and 222°C for the oxidation of acetone and toluene, respectively, but the activity can maintain stability in long time tests. These results show that the doping of Cu in Co₃O₄ can cause lattice distortion, produce a Cu–O-Co bond, weaken the bond energy of the Co-O bond, thus increasing the mobility of lattice oxygen. When Cu is excessive, the appearance of CuO changes the structure of the catalyst and forms the CuO-Co₃O₄ interface, which can also promote the generation of active oxygen at the interface. However, during the long-term test of toluene and acetone, the rate of active oxygen recycling is slow in the interface, resulting in poor stability.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"9 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143901428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}