Chemical Engineering Science最新文献

{"title":"Correlating cone/jet features of electrospinning with fiber diameter and wettability to modulate fiber membranes with different wettabilitiy","authors":"Zhaojin Lu, Mengyao Qin, Zhiwen Wang, Hang Yang, Qingling Han, Jianguo Sun, Jin Sha, Yong Zhu, Zhishan Bai","doi":"10.1016/j.ces.2025.122729","DOIUrl":"https://doi.org/10.1016/j.ces.2025.122729","url":null,"abstract":"Electrospinning is capable of fabricating nanofiber membranes with tunable structures and surface properties. However, the lack of quantitative predictive models correlating process signatures with membrane wettability hinders the rational design and application of these membranes for scenarios with specific wettability requirements. In this study, we achieved the precise extraction of key cone/jet feature parameters in the electrospinning experiment, including cone-end length (<em>L</em><sub>c</sub>), jet-start length (<em>L</em><sub>j</sub>), straight jet length (<em>L</em><sub>sj</sub>), and Taylor cone volume (<em>V</em><sub>c</sub>), with a feature point recognition accuracy of 0.99, by integrating in-situ high-speed imaging with a self-developed algorithm. The results demonstrated a statistically stable correlation between <em>L</em><sub>c</sub> and fiber diameter (R<sup>2</sup> > 0.86–0.99), while <em>L</em><sub>j</sub> exhibited notably superior predictive capability for fiber diameter within concentration groups (R<sup>2</sup> > 0.99). A highly multiple regression model, <span><span style=\"\"><math><mrow is=\"true\"><msub is=\"true\"><mi is=\"true\">D</mi><mtext is=\"true\">f</mtext></msub><mo is=\"true\" linebreak=\"goodbreak\" linebreakstyle=\"after\">=</mo><mrow is=\"true\"><mspace is=\"true\" width=\"0.333333em\"></mspace><mtext is=\"true\">lg</mtext><mspace is=\"true\" width=\"0.333333em\"></mspace></mrow><mfenced close=\")\" is=\"true\" open=\"(\"><mrow is=\"true\"><mrow is=\"true\"><msubsup is=\"true\"><mi is=\"true\">L</mi><mrow is=\"true\"><mtext is=\"true\">c</mtext></mrow><mrow is=\"true\"><mn is=\"true\">299.02</mn></mrow></msubsup><msubsup is=\"true\"><mi is=\"true\">L</mi><mrow is=\"true\"><mtext is=\"true\">j</mtext></mrow><mrow is=\"true\"><mn is=\"true\">464.59</mn></mrow></msubsup><msubsup is=\"true\"><mi is=\"true\">V</mi><mrow is=\"true\"><mtext is=\"true\">c</mtext></mrow><mrow is=\"true\"><mrow is=\"true\"><mspace is=\"true\" width=\"0.333333em\"></mspace><mtext is=\"true\">-</mtext><mspace is=\"true\" width=\"0.333333em\"></mspace></mrow><mn is=\"true\">399.88</mn></mrow></msubsup></mrow></mrow></mfenced><mrow is=\"true\"><mspace is=\"true\" width=\"0.333333em\"></mspace><mtext is=\"true\">-</mtext><mspace is=\"true\" width=\"0.333333em\"></mspace></mrow><mn is=\"true\">0.016</mn><mo is=\"true\">·</mo><mn is=\"true\">0</mn><mo is=\"true\">.</mo><msup is=\"true\"><mn is=\"true\">25</mn><msub is=\"true\"><mi is=\"true\">L</mi><mtext is=\"true\">sj</mtext></msub></msup><mrow is=\"true\"><mspace is=\"true\" width=\"0.333333em\"></mspace><mtext is=\"true\">-</mtext><mspace is=\"true\" width=\"0.333333em\"></mspace></mrow><mn is=\"true\">83.72</mn></mrow></math></span><span style=\"font-size: 90%; display: inline-block;\" tabindex=\"0\"></span><script type=\"math/mml\"><math><mrow is=\"true\"><msub is=\"true\"><mi is=\"true\">D</mi><mtext is=\"true\">f</mtext></msub><mo linebreak=\"goodbreak\" linebreakstyle=\"after\" is=\"true\">=</mo><mrow is=\"true\"><mspace width=\"0.333333em\" is=\"true\"></mspace><mtext is=\"true\">lg</mtext><mspace width=\"0.333333em\" is=\"true\"><","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"19 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Targeted cancer therapy through self-regulated magnetic hyperthermia using biocompatible zirconium-doped LSMO nanoparticles","authors":"S. Murugan, M. Ashokkumar","doi":"10.1016/j.ces.2025.122731","DOIUrl":"https://doi.org/10.1016/j.ces.2025.122731","url":null,"abstract":"This work examined the efficacy of novel La³⁺ substituted Zr⁴⁺ in Lanthanum strontium manganese oxide (LSMO) superparamagnetic nanoparticles (SPMNPs) for self-regulated magnetic hyperthermia therapy. The effects of Zr doping on the structural, morphological, elemental, compositional, colloidal, hydrodynamic, thermal, magnetic, and heating properties of La_0.76-xZr_xSr_0.24MnO₃ (x = 0, 0.01, 0.03, and 0.05; labeled LZ1-LZ4). The XRD and Rietveld refinement analysis confirmed the synthesized SPMNPs exhibit rhombohedral R-3c space group with high phase purity. The nanoparticles sizes reduced from 28.3 to 24.8 nm by added Zr⁴⁺ concentration. EDS and XPS analysis confirmed the presence of La³⁺, Zr⁴⁺, Sr²⁺, Mn³⁺, and Mn⁴⁺ in the synthesized SPMNPs. The TGA/DSC analysis confirmed that the addition of Zr⁴⁺ into the LSMO SPMNPs enhanced their thermal stability up to 900 °C. Magnetic property analysis revealed that the synthesized SPMNPs exhibit superparamagnetic behaviour, with both magnetization and Curie temperature decreasing in a size-dependent manner. Notably, LZ2 exhibited a Curie temperature of 317 K, optimal for self-regulated magnetic hyperthermia. Inductance heating study demonstrated that LZ2 reached 317 K within 900 sec and exhibited a high specific absorption rate (SAR) of 54.38 W/g and intrinsic loss parameter value is 8.382 nHm²g⁻¹. The <em>in vitro</em> cytotoxicity assay confirmed that the synthesized SPMNPs exhibited excellent biocompatibility up to 1000 µg/mL. This work highlights the potential of Zr⁴⁺-doped LSMO SPMNPs, particularly LZ2 SPMNPs, as biocompatible, self-regulating agents for targeted magnetic hyperthermia in cancer therapy.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"7 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on decoupling of carbonization and activation processes in the preparation of powdered activated coke via one-step method under flue gas atmosphere","authors":"Binxuan Zhou, Jie Ma, Yaqiong Wang, Weiwei Xuan, Tao Wang, Xingxing Cheng, Jiansheng Zhang","doi":"10.1016/j.ces.2025.122649","DOIUrl":"https://doi.org/10.1016/j.ces.2025.122649","url":null,"abstract":"This study built on the one-step method for preparing powdered activated coke (PAC), conducting pure carbonization, single-component activation, and flue gas activation experiments using SL-coal and JJ-coal. It examined how carbonization and activation affect PAC yield, burn-off, gas-phase product yield, physicochemical properties and SO₂ adsorption capacities of PACs, and their distinct contributions. Results show that the activation mechanisms of O₂, CO₂, and H₂O(g) varied with coal types. O₂ primarily consumes volatiles in SL-coal, converting them into CO₂/H₂O(g) to enhance active component diffusion, while in JJ-coal, it ablates liquid-phase products to expose pores; CO₂ mainly promotes micropore development; H₂O(g) expands and creates pores in SL-coal but is less effective in JJ-coal due to pore blockage. Flue gas components synergistically form hierarchical pores and enriched surface oxygen-containing functional groups. Besides, the carbonization process dominates the burn-off contribution, the contribution degrees of the carbonization and activation processes to burn-off are in a ratio of 4:1 for SL-PAC and 2.4:1 for JJ-PAC. For SL-PAC, the carbonization process primarily governs pore structure and SO₂ adsorption performance, the contribution degrees of the carbonization and activation processes to <em>S</em>_BET are in a ratio of 1.7:1, to <em>V</em>_Tot of 1.5:1, and to SO₂ adsorption capacity of 1.7:1. In contrast, the activation process dominates JJ-PAC’s <em>S</em>_BET and SO₂ adsorption, the contribution degrees of the carbonization and activation processes to <em>S</em>_BET are in a ratio of 0.18:1, and to SO₂ adsorption capacity of 0.8:1. This work provides theoretical insights for the tailored preparation of coal-based PAC.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"10 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface microenvironment regulation of nitrogen-doped carbon via deep eutectic solvent for enhanced oxygen reaction kinetics in zinc-air batteries","authors":"Guowei Hao, Peng Wang, Daijei Deng, Wei Zhang, Suqin Wu, Wenhao Zhang, Henan Li, Li Xu","doi":"10.1016/j.ces.2025.122738","DOIUrl":"https://doi.org/10.1016/j.ces.2025.122738","url":null,"abstract":"Nitrogen-doped carbon (NC) is regarded as a highly promising alternative to costly platinum-based catalysts for catalyzing efficient and stable oxygen reduction reactions (ORR) to enhance the performance of zinc-air batteries (ZABs). However, the insufficient intrinsic catalytic activity of the NC restrict the ORR kinetics, thereby limiting the actual performance of ZABs. Herein, the NC was surface modified with Li-based deep eutectic solvent (DES) with low spatial site resistance to obtain Li-based NC catalyst (Li-NC). The Li-based DES adsorbed on the surface of NC by the hydrogen bonding to regulate the surface microenvironment and hydrophicity of the NC, thereby accelerating the ORR kinetics. The Li-NC exhibited a high half-wave potential (0.871 V) compared to NC (0.852 V). The ZAB with Li-NC demonstrated a great power density (158.5 mW cm⁻²) and excellent specific capacity 736.15 mA h g⁻¹), superior to that of NC (122.5 mW cm⁻² and 696.32 mA h g⁻¹). Moreover, the charging and discharging cycle time of the zinc-air battery with Li-NC was 685 h. The surface microenvironment modification with DES provides an effective strategy to improve the oxygen reactivity kinetics of NC catalysts, with great significance for future practical or commercial applications.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"9 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Removal of total organic carbon and calcium ions from leachate membrane concentrate through polyferric sulfate coagulation enhanced with biochar","authors":"Zengchen Su, Xue Song, Yongde Liu, Jie Zhang, Feiyue Wang, Guihua Yan, Zeying Zhang, Hailong Fu, Tianzeng Jin","doi":"10.1016/j.ces.2025.122739","DOIUrl":"https://doi.org/10.1016/j.ces.2025.122739","url":null,"abstract":"With the development of industrialization and urbanization processes, a large amount of leachate membrane concentrate (LMC) with poor biodegradability, high organic pollutants and salt content has been generated. Previous studies often struggled to balance treatment effectiveness with operational costs or caused secondary pollution. In this study, polyferric sulfate (PFS) was selected for the coagulation treatment of LMC with Box-Behnken Design (BBD) experiments as optimization and then enhanced with wheat dust biochar (WDB) to solve the above problems. The optimized conditions were a pH of 5.9, a PFS dosage of 4.8 g/L, a water temperature of 19.9 °C, a rapid stirring speed of 400 rpm, and a slow stirring time of 15 min, achieving a total organic carbon (TOC) removal rate of 75.20 % with corresponding reductions in other pollutant indicators. When biochar was added, the TOC, ammonium nitrogen (NH₄⁺-N) and Ca²⁺ removal rates increased to 81.36 %, 82.85 % and 90.23 %, respectively. The chroma and turbidity were also significantly reduced. Moreover, adding<!-- --> <!-- -->biochar increased the sedimentation rate to 3.75 times the original rate, reduced sludge volume and improved water yield, leading to cost savings. Overall, this method is simple to operate and environmentally friendly, offering both effective treatment and economic benefits and holding practical significance for engineering applications and resource recovery.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"94 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrathin asymmetric porous anion exchange membranes for high-efficiency electrodialysis desalination","authors":"Caijin Zhou ,&nbsp;Guixiang Wang ,&nbsp;Yafei Cheng ,&nbsp;Gang Lu ,&nbsp;Weixiong Jian ,&nbsp;Xiaocheng Lin ,&nbsp;Chenxiao Jiang","doi":"10.1016/j.ces.2025.122737","DOIUrl":"10.1016/j.ces.2025.122737","url":null,"abstract":"<div><div>Freshwater scarcity has intensified the demand for energy-efficient desalination technologies. Among these, electrodialysis (ED) heavily depends on anion exchange membranes (AEMs) that exhibit low resistance and high permselectivity. However, conventional dense AEMs often suffer from thick structures and limited ion transport. This paper presents a structurally tunable ultrathin porous crosslinked AEM based on brominated poly(phenylene oxide) (BPPO). A non-solvent induced phase separation (NIPS) method is used to construct an asymmetric porous framework. Subsequent in situ crosslinking with piperazine and cationization with 1, 2-dimethylpiperazine stabilize the structure and introduce fixed piperazinium groups. The architecture combines high free volume for rapid counter-ion transport with sealed pores and a crosslinking network to suppress co-ion leakage. The membrane microstructure and electrochemical properties can be precisely tuned by adjusting the crosslinking duration. The optimized CCPPO-4 h membrane, with an ultrathin selective layer of only 0.84 μm, exhibits excellent desalination performance. Compared to the commercial AMV AEM, CCPPO-4 h achieves 24.5 % lower energy consumption (1.76 kWh kg⁻¹) and 15.4 % higher current efficiency (89.95 %). This work demonstrates the promise of tunable ultrathin porous AEMs fabricated via scalable processes for next-generation low-energy ED desalination.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"321 ","pages":"Article 122737"},"PeriodicalIF":4.3,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"NH3 annealing for preparing Pt nanocluster@N-doped hollow mesoporous carbon spheres with enhanced hydroxyl aldehyde hydrogenation","authors":"Xiaoning Lai ,&nbsp;Guofeng Zhao ,&nbsp;Chao Zhang ,&nbsp;Xiayang Wei ,&nbsp;Yinghua Jiang ,&nbsp;Xueyuan Tang ,&nbsp;Zhiguo Lv","doi":"10.1016/j.ces.2025.122733","DOIUrl":"10.1016/j.ces.2025.122733","url":null,"abstract":"<div><div>The development of nitrogen-doped mesoporous carbon spheres (N-CS) integrated with metal nanoclusters for enhanced hydroxyl aldehyde hydrogenation remains challenging. In this work, a NH₃ annealing strategy was employed to prepare Pt nanocluster-loaded nitrogen-doped mesoporous carbon spheres (Pt@N-CS) catalysts. In Pt@N-CS, Pt nanoclusters are anchored onto nitrogen-doped carbon spheres via strong Pt–N interactions, which facilitate electron transfer and effectively suppress Pt leaching and agglomeration. The hydrogenation of 2-ethyl-3-hydroxyhexanal using Pt@N-CS shows nearly 98 % conversion and yield, with selectivity close to 100 % under optimal conditions. Density functional theory calculations reveal that nitrogen doping induces electron-deficient Pt sites, which enhance the adsorption and activation of H₂ (−0.93 eV) and EHA (−1.66 eV). The charge redistribution at the metal-support interface could strengthen the interaction between Pt and the carbonyl group of 2-ethyl-3-hydroxyhexanal. Consequently, the energy barrier of the rate-determining step is reduced by 0.06 eV, thereby facilitating the hydrogenation process under mild conditions.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"321 ","pages":"Article 122733"},"PeriodicalIF":4.3,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel MBP/Fe2+/PMS process for efficient synergistic degradation of cefixime in water","authors":"Jingsong Ming ,&nbsp;Wei Chen ,&nbsp;Zhiyi Zhu ,&nbsp;Guangliang Chen ,&nbsp;Shupeng Zhao ,&nbsp;Fei Gong ,&nbsp;Jun Huang","doi":"10.1016/j.ces.2025.122723","DOIUrl":"10.1016/j.ces.2025.122723","url":null,"abstract":"<div><div>Cefixime (CFX), a widely used antibiotic, has become a challenge for the treatment of antibiotic pollution in water bodies. In this study, the performance and mechanism of microbubbling plasma (MBP) combined with ferrous ions (Fe²⁺) to activate peroxymonosulfate (PMS) and peroxodisulfate (PDS) in degrading CFX were compared. The effects of the dosages of PMS/PDS and Fe²⁺, plasma discharge voltage, and gas flow rate on the degradation efficiency were investigated systematically. Under optimal conditions, the degradation rate of CFX reached 90.75 %, which was significantly higher than that of MBP alone (a 27.81 % increase) and the MBP/PDS system (a 23.76 % increase), indicating a high degree of synergy among MBP, Fe²⁺, and PMS. The energy efficiency of this system was as high as 1.95 g/kWh. Ultraviolet–visible spectroscopy and total organic carbon analysis indicated that the addition of PMS and Fe²⁺ promoted the degradation and mineralization of CFX. The detection of reactive oxygen and nitrogen species combined with radical scavenging experiments confirmed that singlet oxygen (¹O₂), hydroxyl radicals (·OH) and sulfate radicals (SO₄·⁻) were the most important active species in the degradation process. Based on the results of a liquid-chromatography–mass-spectrometry analysis, three main CFX degradation pathways were identified. In addition, the toxicities of CFX and its degradation intermediates were evaluated using toxicity assessment software. This study provides a new plasma-based method for the degradation of CFX, which has value as a reference for the future treatment of antibiotic-polluted water bodies.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"321 ","pages":"Article 122723"},"PeriodicalIF":4.3,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 Data-Driven method for Lead-Lag analysis in Coal-Fired power plants using an improved DTW algorithm","authors":"Jieheng Zhou, Meirong Dong, Guangya Wang, Youcai Liang, Jidong Lu","doi":"10.1016/j.ces.2025.122736","DOIUrl":"https://doi.org/10.1016/j.ces.2025.122736","url":null,"abstract":"The dynamic characteristics of coal-fired power plants during load change processes are essential for safe, clean, and efficient operation. However, existing approaches struggle to capture lead–lag relationships among key operational parameters, particularly during load change processes, where Dynamic Time Warping (DTW) often suffers from local alignment errors. This study proposes a data-driven method, FSSS-DTW, which integrates filtering, smoothing, standardization, shape-based feature extraction, and an improving step pattern to reduce alignment errors and improve temporal alignment accuracy. The effectiveness of the proposed method is validated using operational data from a 330 MW subcritical coal-fired power plant, where it demonstrates superior capability in extracting accurate lead-lag relationships and interpreting control-response dynamics. The results reveal that fuel input consistently lags behind steam flow during load changes, while high-pressure valve opening exhibits minimal lag. For energy flows, enthalpy changes across boiler heat exchangers lag behind energy input in sliding-pressure mode but lead in constant-pressure mode. The proposed method provides a scalable and interpretable tool for dynamic analysis, offering new insights into coordination mechanisms between turbine and boiler subsystems and supporting intelligent monitoring in complex energy systems.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"21 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CO2 methanation over Ni/Ce0.75Zr0.25O2 catalysts: Dependence on Ni particle size","authors":"V.P. Pakharukova, A.M. Gorlova, N.A. Kharchenko, O.A. Stonkus, Z.S. Vinokurov, A.A. Saraev, A.Yu. Gladky, V.N. Rogozhnikov, D.I. Potemkin","doi":"10.1016/j.ces.2025.122734","DOIUrl":"https://doi.org/10.1016/j.ces.2025.122734","url":null,"abstract":"A series of supported catalysts Ni/Ce_0.75Zr_0.25O₂ with an equal Ni loading (9 wt%) was prepared via different routes. To obtain catalysts with higher metal dispersion, two methods were used: incipient wetness impregnation (IWI) of the support with an aqueous Ni(NO₃)₂ solution containing ethylene glycol (EG) and deposition–precipitation (DP) technique. Two catalysts were synthesized by conventional IWI using different Ni precursors (Ni(NO₃)₂ and [Ni(NH₃)₆](NO₃)₂). Diagnostics showed that the obtained catalysts differed in the dispersion of supported nanoparticles. Catalytic studies revealed the impact of Ni particle size in the range of 12–48 nm on the performance in the CO₂ methanation. The enlargement of Ni particles resulted in a decrease in selectivity and CO₂ methanation activity in terms of TOF. <em>In situ</em> synchrotron XRD and <em>pseudo in situ</em> XPS studies were used to detect alterations in the composition and structure of the catalysts that proceed during their activation by heating in a hydrogen-enriched atmosphere. The results showed that the activation treatment induces a partial reduction of the support material Ce_0.75Zr_0.25O₂ due to Ni-mediated hydrogen spillover. <em>In situ</em> DRIFTS results pointed out that the generation of surface Ce³⁺ and oxygen vacancies during the support reduction opens an associative formate pathway in the CO₂ methanation, which is widely believed to occur at the metal/support interfaces. The enhanced activity of the catalysts containing smaller Ni particles with developed contacts between the metal and support particles is most likely due to greater formate pathway contribution.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"28 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145203933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}