Separation and Purification Technology最新文献

{"title":"Ceramic-based graphene oxide/ultrafine activated carbon hybrid oil-water separation membrane","authors":"Anwen Chen ,&nbsp;Dong Zhan ,&nbsp;Razium A. Soomro ,&nbsp;Ning Qiao ,&nbsp;Xiaojie Zhang ,&nbsp;Bin Xu","doi":"10.1016/j.seppur.2026.137006","DOIUrl":"10.1016/j.seppur.2026.137006","url":null,"abstract":"<div><div>Graphene oxide (GO)-based membranes have brought great research interest and wide application prospects in the field of oil-in-water emulsion separation by virtue of their unique properties. However, the rational design of the rough structure of the membrane surface and the exploration of the stability of the prepared membranes are still insufficient, which greatly limits the possibility of their survival in practical use. In this study, GO with larger lamellar size, ultrafine activated carbon (UAC) particles, and polyvinyl alcohol (PVA) as adhesive were compounded to form a membrane on the (3-aminopropyl) triethoxysilane (APTES) pretreated ceramic support by vacuum filtration. The composite membrane exhibits superb oil-repellent properties (underwater oil contact angle up to 162.6°) and very low oil adhesion underwater, while providing better mechanical strength and stability than porous polymer-supported membranes. After the GO sheets cover the UAC particles and form the membrane, the GO sheets generate micron-scale bumps with UAC spatial contours and nanoscale secondary folds due to the bending deformation of the GO sheets. The good combination of these structures endows the membrane with an excellent graded rough surface structure. On the surface of the membrane, it is possible to prepare two rough structures using only one material, the GO sheet. The intercalation of UAC particles resulted in a 72.6-fold increase in pure water flux to 94.38 L·m⁻²·h⁻¹ compared to pure GO membranes, while providing excellent separation performance and resistance to contamination (14.6% flux decline ratio and 95.7% flux recovery ratio while maintaining &gt;99% emulsion removal). Moreover, adding PVA provided better mechanical strength and anti-swelling properties for the membrane, and the ceramic support pretreated with APTES had better bonding strength with the GO laminate. This study inspires the surface microscopic design of GO-based oil-in-water emulsion separation membranes and new ideas for preparing GO-based membranes with practical prospects, high throughput, and good antifouling properties.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137006"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172300","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":"Synergistic effect of filler sieving and polymer rigidification for selective C2H4/C2H6 separation","authors":"Linxuan Han,&nbsp;Yutao Liu,&nbsp;Dongxiao Yang,&nbsp;Jian Tan,&nbsp;Chao Zhi,&nbsp;Yang Chen,&nbsp;Jinping Li,&nbsp;Libo Li","doi":"10.1016/j.seppur.2026.137196","DOIUrl":"10.1016/j.seppur.2026.137196","url":null,"abstract":"<div><div>Membrane separation technology on account of low energy consumption shows great potential for energy-intensive C₂H₄/C₂H₆ separation. Mixed matrix membranes (MMMs), fabricated by embedding sieving functional fillers within polymer, are expected to improve the separation performance of conventional polymer. However, most MMMs fail to deliver the anticipated gains in C₂H₄/C₂H₆ separation selectivity. Sieving fillers typically have ultra-small pores that may impose higher entry barriers on polarizable hydrocarbons than the dynamic free-volume elements of polymers. Thus, focus should extend beyond the filler itself to the structural variations of the polymer matrix upon filler incorporation. In this work, we incorporated an C₂H₄/C₂H₆ sieving metal-organic framework material, Cu(BF₄)₂(4-DPDS)₂, into 6FDA-DAM to fabricate MMMs for C₂H₄/C₂H₆ separation. It is found that the size sieving ability of Cu(BF₄)₂(4-DPDS)₂ contributes partially to the improved C₂H₄/C₂H₆ diffusion selectivity. Additionally, the rigidification of 6FDA-DAM molecular chains induced by the strong interfacial interaction markedly hinders C₂H₆ transport. These two factors act synergistically to effectively enhance the C₂H₄/C₂H₆ diffusion selectivity. For an equimolar gas mixture, the filler-optimized MMMs exhibit a C₂H₄ permeability of 13.35 barrer and a C₂H₄/C₂H₆ selectivity of 7.02, exceeding the separation upper bound reported in 2013 and representing the highest selectivity reported for sieving-filler-based MMMs. This work provides valuable insights for the rational design of high-performance MMMs for ethylene/ethane separation.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137196"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172352","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":"Morphological impact of Ni-based electrodes (solid Ni sheets vs. Ni-assisted W meshes) on Lu(III) electrochemical behavior and efficient extraction mechanism in LiCl-KCl molten salts","authors":"Jiacheng Li ,&nbsp;Ji Wang ,&nbsp;Peidong He ,&nbsp;Junyang Shu ,&nbsp;Jinshuo Yang ,&nbsp;Wenlong Li ,&nbsp;Xiangbiao Yin ,&nbsp;Deqian Zeng ,&nbsp;Qiang Wu ,&nbsp;Yuezhou Wei","doi":"10.1016/j.seppur.2026.137150","DOIUrl":"10.1016/j.seppur.2026.137150","url":null,"abstract":"<div><div>Spent nuclear fuel dry reprocessing demands efficient recovery of valuable rare-earth elements, yet its extraction from complex LiCl-KCl molten salt matrices remains challenging. This study investigates the electrochemical behaviors and underlying mechanism of Lu(III) in LiCl-KCl molten salts, with a focus on its efficient extraction via Ni-based systems. The electrochemical behavior of Lu(III) on W and Ni-assisted W electrodes using various electrochemical methods was studied. On W electrodes, cyclic voltammetry (CV), square wave voltammetry (SWV), and chronopotentiometry (CP) measurements yielded the diffusion coefficient of Lu(III) in the salt, while comparison with the Scharifker-Hill model confirmed that Lu nucleation follows a three-dimensional instantaneous mechanism, and thermodynamic data of Lu(III)/Lu(0) were calculated. For Ni-assisted W electrodes, different techniques identified Lu<img>Ni intermetallic compounds, with subsequent computation of the thermodynamic parameters of Lu<img>Ni alloys. A comparative extraction efficiency of Lu across cathode configurations showed that the Ni-assisted W electrodes exhibited the highest efficiency, attributed to their larger specific surface area. XRD and SEM-EDS analysis were conducted on the alloy products.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137150"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172350","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":"Advancements in solar still performance enhancement through heat pipes, evacuated tubes, and pulsating heat pipes: a comprehensive review","authors":"Jay R. Patel,&nbsp;Y. Naresh","doi":"10.1016/j.seppur.2026.137159","DOIUrl":"10.1016/j.seppur.2026.137159","url":null,"abstract":"<div><div>Addressing water scarcity and improving the quality of life in arid and semi-arid regions necessitates the development of sustainable freshwater production technologies. Among them, solar stills offer a simple and eco-friendly solution by converting saline water into potable water using only solar radiation. However, their productivity remains significantly lower compared to conventional desalination methods, prompting extensive research into performance enhancement strategies. Various augmentation techniques—including nanofluids, phase change materials (PCMs), sensible heat storage, and heat pipes—have been investigated to overcome these limitations. The novelty of this review lies in its comprehensive bibliometric and in-depth technical analysis of heat pipe-assisted solar stills over a 25-year period (2000–2025), integrating both evacuated tube and pulsating heat pipe configurations. Unlike earlier reviews, this study quantitatively correlates research trends with system-level advancements—particularly in energy storage, phase change material integration, and hybrid enhancement techniques—to establish a clear roadmap for the next generation of high-performance solar desalination systems. The analysis highlights year-wise publication growth, geographical and journal-wise contributions, and keyword co-occurrence networks, where emerging themes include energy storage, heat exchanger, water depth, and phase change material. Recent advances in evacuated tube-based collectors and their performance under varying operating parameters are systematically examined, along with detailed discussions on pulsating heat pipe (PHP)-integrated solar stills. Furthermore, the review outlines the comparative benefits, limitations, and challenges of these technologies, offering critical insights to guide the development of next-generation solar desalination systems with improved efficiency, reliability, and economic feasibility.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137159"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172414","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":"Co-ZIF sacrificial templates precisely fabricate MCo-LDH (M = Ni/Cu): Bimetallic synergy regulates PMS activation for synergistic As(III) oxidation-adsorption in complex waters","authors":"Boyu Du,&nbsp;Xianjin Qi,&nbsp;Yongkui Li,&nbsp;Yijin Liu,&nbsp;Jiarui Xiao,&nbsp;Nianyi Zao,&nbsp;Haifeng Chen,&nbsp;Yonglei Bu","doi":"10.1016/j.seppur.2026.137235","DOIUrl":"10.1016/j.seppur.2026.137235","url":null,"abstract":"<div><div>Developing novel catalysts for highly efficient activation of PMS is crucial for the purification of arsenic-containing wastewater. In this study, a Co-ZIF sacrificial template was employed to construct NiCo-LDH and CuCo-LDH catalysts with hollow nanocage and nanoflower structures respectively, via Ni²⁺/Cu²⁺ directional etching. The effects of Ni²⁺/Cu²⁺ doping levels on the catalyst's structure, composition, and performance were systematically investigated, identifying the optimal metal doping ratio as Ni²⁺ (1.50 mmol)/Cu²⁺ (1.25 mmol). More importantly, both NiCo-LDH and CuCo-LDH catalysts demonstrated outstanding PMS activation capabilities, removing 98.80% and 97.37% of total arsenic within 600 s, with total arsenic uptakes reaching 1500.00 mg/g and 1415.00 mg/g (following 24 h adsorption equilibrium), respectively. Mechanistic analyses indicate that NiCo-LDH continuously activates PMS through the Ni²⁺/Ni³⁺ and Co³⁺/Co²⁺ redox cycles, generating radicals (SO₄^•− and ^•OH) that participate in the oxidation process of As(III). In contrast, CuCo-LDH promotes radical generation through Cu²⁺/Cu⁺ cycles, while also suggesting the formation of non-radical species (¹O₂), thereby establishing a potential synergistic “radical+non-radical” oxidation pathway. As(<em>V</em>) generated through oxidation in both systems is removed through coordination exchange (M − O − As), ion exchange (interlayer NO₃⁻ substitution), and electrostatic attraction. Additionally, both systems exhibit excellent adaptability to a wide range of concentrations in actual wastewater. After treating low-concentration arsenic-containing wastewater (simulating groundwater), the residual arsenic concentration was below 10.00 μg/L, significantly lower than drinking water standards. In summary, this study proposes a novel strategy for treating arsenic-contaminated wastewater using a Co-ZIF derived LDH to activate PMS, demonstrating broad application prospects in practical arsenic pollution control.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137235"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172493","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":"Sustainable fabrication of cellulose beads supported CoFe2O4 and ag-CoFe2O4 catalysts for enhanced tetracycline degradation via PMS activation","authors":"Brahim El Allaoui ,&nbsp;Hanane Benzeid ,&nbsp;Ali Ouhssain ,&nbsp;Issam Meftah Kadmiri ,&nbsp;Nadia Zari ,&nbsp;Abou el kacem Qaiss ,&nbsp;Tao Wu ,&nbsp;Cheng Heng Pang ,&nbsp;Rachid Bouhfid","doi":"10.1016/j.seppur.2026.137119","DOIUrl":"10.1016/j.seppur.2026.137119","url":null,"abstract":"<div><div>This study presents a heterogeneous advanced oxidation process (AOP) for antibiotic removal using fibrous cellulose beads (CB) as sustainable catalyst supports. The CB were fabricated from biomass through a green, mechanical approach that avoids cellulose dissolution, preserving their native fibrous structure. Two catalysts, CoFe₂O₄@CB and Ag-CoFe₂O₄@CB, were synthesized via co-precipitation and in situ silver doping. Structural analyses confirmed the spinel CoFe₂O₄ phase, successful Ag incorporation, uniform nanoparticle dispersion, and strong interfacial coupling involving mixed-valence Co/Fe species, Ag-related surface species, and multiple oxygen environments. Under identical optimal conditions identified by Response Surface Methodology (RSM) using a Box–Behnken Design (BBD) (0.40 g L⁻¹ catalyst, 0.50 g L⁻¹ peroxymonosulfate (PMS), 20 mg L⁻¹ tetracycline (TC), 50 min), Ag-CoFe₂O₄@CB achieved 96.18% TC degradation with a higher apparent pseudo-first-order rate constant (k = 0.0690 min⁻¹) than CoFe₂O₄@CB (93.35%, k = 0.0568 min⁻¹), corresponding to ∼43% lower residual TC after 50 min. The enhancement is attributed to Ag-mediated promotion of ROS generation and interfacial electron-transfer processes, while also imparting rapid antibacterial activity against <em>Escherichia coli</em> and <em>Staphylococcus aureus</em>. The fibrous CB architecture further improved catalyst stability, reusability, and mass transfer. The dissolution-free fibrous CB platform enables a scalable, bio-based, and multifunctional catalyst architecture for PMS-driven antibiotic abatement and microbial control in water treatment.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137119"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172419","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":"Bio-metal-organic framework with Nano-window traps for ultra-selective thorium separation","authors":"Maroof Ahmad Khan ,&nbsp;Shaohui Huang ,&nbsp;Xinfeng Du,&nbsp;Yongjie Yang,&nbsp;Yan Li,&nbsp;Yihui Yuan,&nbsp;Ning Wang","doi":"10.1016/j.seppur.2026.137179","DOIUrl":"10.1016/j.seppur.2026.137179","url":null,"abstract":"<div><div>Selective separation of Th(IV) from chemically similar actinides and rare-earth ions remains a critical barrier to advancing thorium-based nuclear technologies. Here we report a bio-derived dual-ligand MOF platform in which uridine triphosphate and auxiliary N-donor linkers cooperatively assemble O/N-rich nano-window traps that enable precise Th(IV) discrimination. The engineered pore architecture enhances site accessibility, while confined coordination environments promote strong inner-sphere Th-O/N binding and adsorption-induced electronic reorganization. The nano-window confinement and electronic coupling govern precise Th(IV) discrimination. These synergistic structural and mechanistic features yield exceptional selectivity against 17 competing ions as well as high capacity of 553 mg g⁻¹ at pH 3.0. Our findings establish a rational strategy for designing biologically inspired MOFs capable of robust, high-fidelity Th(IV) capture, offering a viable route toward sustainable nuclear-fuel processing and radionuclide remediation.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137179"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172558","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":"Understanding the adsorption trilemma: Achieving load, level, and selectivity for the removal of pharmaceuticals with zeolites","authors":"Jakob Brauer ,&nbsp;Parisa Mahdavi ,&nbsp;Jorg Thöming ,&nbsp;Michael Fischer","doi":"10.1016/j.seppur.2026.137086","DOIUrl":"10.1016/j.seppur.2026.137086","url":null,"abstract":"<div><div>The persistence and ecotoxic effects of pharmaceuticals in aquatic environments demand their removal from wastewater treatment plant effluents. Adsorbents for this purpose must combine high uptake at low concentration levels and a high adsorption load (capacity) with strong selectivity over competing wastewater constituents. Yet, a systematic strategy to address this trilemma remains elusive. Here, we present such an approach using commercial zeolites, which are promising candidates for selective removal owing to the strong influence of molecular shape–topology relationships on interaction energies. The removal of carbamazepine (CBZ) and diclofenac (DCF) with maximum capacities and affinities of 59.71 mg/g and 3.37 L/mg, as well as 104.28 mg/g and 0.21 L/mg, respectively, could be maintained for CBZ adsorption in a secondary-treated municipal wastewater effluent (WWTP effluent), while the adsorption of DCF was significantly reduced. Thermodynamic interpretation of the experimental isotherm parameters showed an excellent quantitative agreement with free energy perturbation simulations, yielding consistent free adsorption energies for CBZ across all zeolites. This confirms that for structurally rigid pollutants, mostly consisting of annulated ring structures, the shape-topology fit is the dominant and predictive factor for adsorption, providing a clear design principle for the targeted selection of zeolites. In contrast, the deviations observed for the DCF molecule with a more flexible structure, consisting of two rings that can more freely arrange with respect to each other, highlight that for non-rigid, more complex pollutants, dynamic conformational effects and guest-guest interactions can become critically important. This study reveals the zeolite topology as a determinant of selective pharmaceutical uptake from wastewater and paves the way for contaminant-specific selection.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137086"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172513","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":"Coupling Ni exposure with interfacial oxygen on Zr-doped CeO₂ for stable dry reforming of methane","authors":"Qinghui Yu ,&nbsp;Yuqin Cheng ,&nbsp;Qiufan Qu ,&nbsp;Xuanyu Ji ,&nbsp;Yu Yang ,&nbsp;Yang Su ,&nbsp;Xin Yu ,&nbsp;Lu Yang ,&nbsp;Lin Chen ,&nbsp;Xiong Zhou","doi":"10.1016/j.seppur.2026.137164","DOIUrl":"10.1016/j.seppur.2026.137164","url":null,"abstract":"<div><div>Dry reforming of methane (DRM) co-converts CH₄ and CO₂ but is limited by Ni sintering and carbon deposition at high temperature. CeO₂-based supports with oxygen vacancies can mitigate these issues, and Zr doping further tunes defect chemistry and basicity, yet the combined roles of Zr content, Ni exposure and pore architecture in governing interfacial oxygen supply and stability remain unclear. Spherical CeO₂ with interconnected through-pores and narrow mesopores is used as a common scaffold to prepare 5Ni/Ce₁₋ₓZrₓO₂ catalysts (Zr = 0, 1, 3 and 7 mol%) at fixed Ni loading and morphology. XRD, Raman and XPS confirm homogeneous Ce₁₋ₓZrₓO₂ solid solutions and show that, within the investigated Zr range, 3 mol% Zr gives the highest Ce³⁺ fraction and defect related surface oxygen while maintaining a moderate Ni particle size. CO₂ TPD, O₂ TPD, H₂ TPR and H₂ TPD further indicate that medium strength basic sites, interfacial reducible oxygen and accessible Ni sites are best balanced at 3 mol% Zr among the studied compositions. Under DRM at 800 °C, 5Ni/Ce₀․₉₇Zr₀․₀₃O₂ shows the highest CH₄ and CO₂ conversions, the lowest apparent activation energy, an H₂/CO ratio near 1.0 and the lowest coke amount over 50 h. Post-reaction XRD, TG–DTG, Raman and SEM suggest reduced Ni sintering and a larger fraction of filamentous or weakly bound carbon. These results are consistent with the importance of the Ni–Ce–Zr–O interfacial structure in balancing Ni exposure and oxygen supply, enabling high activity with low coking.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137164"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146185","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":"Finite-time thermodynamics study on solution thermal-regeneration for frost-free air source heat pump","authors":"Liutao Zhu ,&nbsp;Zhikang Yu ,&nbsp;Zhu Jiang ,&nbsp;Xiaosong Zhang ,&nbsp;Shifang Huang","doi":"10.1016/j.seppur.2026.137203","DOIUrl":"10.1016/j.seppur.2026.137203","url":null,"abstract":"<div><div>The solution regeneration process in frost-free air-source heat pump (FFASHP) “imposes a substantial energy burden, directly influencing the overall system efficiency. Although various solution regeneration methods, including evaporation, distillation, and membrane distillation, have been studied extensively, their thermodynamic limits remain unclear. This study utilizes finite-time thermodynamics (FTT) to derive the expression for the minimum heat required in the solution thermal-regeneration process. A comprehensive parametric analysis reveals the interdependencies between solution concentration, regeneration ratio, heat source temperature, ambient temperature, heat transfer capacity-to-mass flow coefficient (<em>θ</em>), and internal reversibility coefficient in determining the minimum specific energy consumption (SEC). Under the basic parameters of this study, the system achieves SEC values of 74.08 kWh/t (thermal) and 16.78 kWh/t (mechanical) at the minimum <em>θ</em>. The <em>θ</em> are 2.12, 3.77, and 7.12 kJ/(kg·K) at thermodynamic second law efficiencies (<em>η</em>_<em>II</em>) of 0.95, 0.9, and 0.8, respectively. Life-cycle cost optimization identifies an economically optimal <em>η</em>_<em>II</em> value of 0.62, corresponding to a minimum total cost of $667.70 over a 20-year operational horizon in the case study. This study establishes theoretical benchmarks for regeneration energy consumption while providing actionable insights for balancing thermodynamic performance with economic viability in FFASHP solution regeneration system design.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"392 ","pages":"Article 137203"},"PeriodicalIF":9.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153668","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}