Korean Journal of Chemical Engineering最新文献

{"title":"Physicochemical Effects on the Chemohydrodynamic Oscillation by the Surface Tension Variation Driven by A + B → C Reaction","authors":"Min Chan Kim","doi":"10.1007/s11814-025-00462-9","DOIUrl":"10.1007/s11814-025-00462-9","url":null,"abstract":"<div><p>The influences of physicochemical parameters on chemohydrodynamic oscillations, driven by surface tension variations due to a bimolecular reaction, are examined numerically. By considering mass, momentum, and chemical species balances across the air–solution interface, we derived interface conditions and incorporated them into the conventional momentum equation, i.e., the Navier–Stokes equation. By considering the reaction rate, the initial reactant ratio, the reactor size, and Marangoni numbers of the reactants and product, we derived some dimensionless physiochemical parameters, and analyzed their effects on the temporal oscillation of the reaction system. Even though the surface tension gradient due to a faster chemical reaction promotes the damped oscillation, the chemical reaction rate plays little role in the onset of oscillation and its period for the fast reaction system. Furthermore, during the initial reaction period, the temporal oscillation of the reaction system is influenced by the physical parameters, i.e., the Marangoni numbers and the initial reactants ratio. However, the effects of these physical parameters become weaker as the reaction progresses.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 10","pages":"2191 - 2200"},"PeriodicalIF":3.2,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of EOS Based on Machine Learning Method on CFD Study of Rapid Hydrogen Refueling Process","authors":"Hyo Min Seo,&nbsp;Byung Heung Park","doi":"10.1007/s11814-025-00460-x","DOIUrl":"10.1007/s11814-025-00460-x","url":null,"abstract":"<div><p>Hydrogen is attracting attention as an eco-friendly energy source that can replace fossil fuels. In particular, hydrogen fuel cell electric vehicles (FCEVs) have been developed to reduce carbon dioxide emissions in the transportation sector. Currently, commercially available FCEVs store hydrogen as highly compressed gas form to increase volumetric energy density. To provide a refueling time similar to that of internal combustion engine vehicles (ICEVs), hydrogen refueling stations (HRSs) are installed to supply gaseous hydrogen into FECVs up to 35 MPa or 70 MPa in a relatively short time. The refueling process of filling compressed gas within a confined volume of the on-board storage tank is inevitably accompanied by the temperature increase. However, the refueling process should be carried out under a limited temperature considering the thermal and mechanical safety of the storage tank. Since the hydrogen storage tank installed in the commercial FCEV is equipped with a single temperature sensor, only the average temperature can be measured and monitored during the refueling process. Therefore, modeling the refueling process is useful for understanding the gas filling phenomenon and finding the optimal refueling strategy. In particular, the CFD study method that considers the motion of the fluid inside the tank enables prediction of local temperature changes inside the storage tank, which cannot be measured in the commercial vehicle refueling process. The CFD research is conducted by combining expressions representing the fluid properties and a model describing the flow characteristics. Therefore, an appropriate combination of equations should be examined before developing a CFD model and simulating the refueling process. In this study, the hydrogen refueling process is simulated using three equations of state (EOSs) and five turbulent models. The results are compared and quantitatively analyzed using experimental data to propose an appropriate EOS with an accurate turbulence model. Experiments of hydrogen filling into Type III tank of 74 L up to 35 MPa within 1 min have been chosen to make the assumption of axial symmetry for CFD model valid. Comparing the three EOSs (SRK, PR, and ML), it is found that the reduction of simulation time can be attained with good accuracy when using ML EOS which has been developed to describe the volumetric property of hydrogen. Among the five turbulence models (yPlus, <i>k</i>–<i>ε</i>, realizable <i>k</i>–<i>ε</i>, low-Reynolds <i>k</i>–<i>ε</i>, and <i>k</i>–<i>ω</i>) generally used in many CFD studies, the realizable <i>k</i>–<i>ε</i> model shows satisfactory results on the reproduction of mean and local thermal behaviors inside of on-board storage tanks.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 8","pages":"1637 - 1653"},"PeriodicalIF":3.2,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison and Evaluation of Marginal and Internal Gaps in Zirconia Crowns Fabricated Using Additive Manufacturing with Top-Down Approach","authors":"Sang-Kyu Lee,&nbsp;Chan Park,&nbsp;Kwang-Ho Jo,&nbsp;Sang-Hyun Choi,&nbsp;Hyein Lee,&nbsp;Kyoung-Jun Jang,&nbsp;Taekyung Yu","doi":"10.1007/s11814-025-00437-w","DOIUrl":"10.1007/s11814-025-00437-w","url":null,"abstract":"<div><p>Zirconia crowns prepared by the milling method are successfully used for single anterior and posterior restorations. Incorrect marginal fit of zirconia prostheses can lead to cavities between the prosthesis and natural teeth, resulting in periodontal disease. In this study, the marginal fit of zirconia crowns manufactured by milling machine and top-down additive manufacturing was compared and analyzed. Existing milling methods show excellent precision, but the fit result might vary or the precision would be lowered depending on the degree of use of the burr. In addition, different results could be shown depending on the limitations of the milling axis of CAD/CAM equipment or the compensation value of the milling bur. The additive manufacturing method could solve all of these limitations because there is no consumption of cutting tools and complex shapes are processed with a constant layer thickness. Furthermore, we confirmed that the top-down approach in 3D printing could enhance precision in ceramic 3D printing.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 8","pages":"1873 - 1879"},"PeriodicalIF":3.2,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive Understanding of Voltage Fade of Li & Mn Rich Cathodes","authors":"Hyunsung Cho,&nbsp;Suyoung Kim,&nbsp;Ye Seul Won,&nbsp;Hyeonseok Lee,&nbsp;Minkyu Kim","doi":"10.1007/s11814-025-00459-4","DOIUrl":"10.1007/s11814-025-00459-4","url":null,"abstract":"<div><p>Li- and Mn-rich (LMR) cathodes have emerged as promising candidates for next-generation lithium-ion batteries (LIBs) due to their high energy density and reliance on earth-abundant elements. Unlike conventional layered transition metal (TM) oxides, LMRs utilize both TM and anion (oxygen) redox reactions to achieve superior capacity. However, their widespread commercialization is hindered by voltage fade, a persistent issue characterized by a gradual decline in the operating voltage upon cycling, which leads to significant energy density loss. This review provides a comprehensive understanding of the fundamental mechanisms contributing to voltage fade, including irreversible phase transitions, transition metal migration, oxygen loss, and microstructural degradation. Furthermore, we discuss state-of-the-art strategies for mitigating voltage fade, including elemental doping, surface coatings, composition modulation, and concentration gradient engineering. Each approach is critically evaluated in terms of its effectiveness in stabilizing the cathode structure and improving long-term electrochemical performance. By integrating recent advancements in material design, this review outlines a strategic roadmap for developing structurally robust and electrochemically stable LMR cathodes, paving the way for their practical implementation in high-energy density LIBs.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 7","pages":"1453 - 1473"},"PeriodicalIF":3.2,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional Biomembranes for Transistor-Based Chemical and Biological Sensing","authors":"Ahmet Ucar,&nbsp;Johana Uribe,&nbsp;Nicole Jara Espinosa,&nbsp;Sumana Bhattacharjee,&nbsp;Sahika Inal","doi":"10.1007/s11814-025-00452-x","DOIUrl":"10.1007/s11814-025-00452-x","url":null,"abstract":"<div><p>Transistor-based platforms offer several advantages for chemical and biological sensing application over conventional electrochemical systems, including enhanced sensitivity, portability, cost-effectiveness, and biocompatibility. However, these devices often require functionalization with specific recognition units, introducing challenges related to the chemical stability of conjugated units, their conformation, and Debye length effects. Lipid-based biomembranes, particularly supported lipid bilayers (SLBs), can mimic the native architecture of cell membranes, acting as biointerfaces that facilitate signal transduction between extra- and intracellular environments. They also provide selective permeability to ions, specificity to biochemicals, as well as ease of integration with diverse materials. Over the past two decades, researchers have focused on integrating biomembranes with transistor platforms to advance bioelectronic sensing technologies and enhance the understanding and monitoring of biological processes. This review explores integrating various lipid-based biomembrane types with transistor-based devices. We review fundamental techniques for producing and characterizing biomembranes, the advantages and limitations of different transistor types, and their working principles in biomembrane-based systems. Additionally, we highlight recent developments in biomembrane-integrated sensing platforms, including their incorporation into transistor architectures, further functionalization with biorecognition units, and applications in detecting analytes.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 9","pages":"2105 - 2122"},"PeriodicalIF":3.2,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11814-025-00452-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Directional Liquid Mobility and Interlocking of Anisotropic Micropillar Structures Modulated by Multiple Compressive Bending","authors":"Mike Jason Koleczko,&nbsp;Jihee Kim,&nbsp;Jaekyoung Kim,&nbsp;Min-Gi Jo,&nbsp;Kee-Youn Yoo,&nbsp;Hyunsik Yoon","doi":"10.1007/s11814-025-00458-5","DOIUrl":"10.1007/s11814-025-00458-5","url":null,"abstract":"<div><p>The study investigates the deformation of elastomeric surfaces under multiple compressive bending to modify the geometry of micro-hyperbolic pillar arrays, enabling enhanced liquid repellency and tunable interlocking properties. During bending, compressive stress transforms circular microholes into elliptical shapes. By repeating the process of compressive bending and replication, we can achieve highly anisotropic pillar arrays for anisotropic wetting behavior with directional liquid mobility. The bending process modulates pillar-to-pillar spacing along different axes, further facilitating anisotropic liquid movement. Furthermore, interlocking microarray patterns exhibit direction-dependent shear stress, resulting in a distinct mechanical response. These findings highlight a scalable, cost-effective strategy for designing smart surfaces with tailored wetting and mechanical properties, with potential applications in droplet manipulation and specialized adhesives.Author names: Please confirm if the author names are presented accurately and in the correct sequence (Mike Jason Koleczko). Also, kindly confirm the details in the metadata are correct.correct</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 11","pages":"2693 - 2700"},"PeriodicalIF":3.2,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design Strategies and Performance Enhancement Techniques for LiFePO4-Based Li Metal Battery Systems","authors":"Jiwon Choi,&nbsp;Jihyeon Kang,&nbsp;Chaerim Kim,&nbsp;Chaerin Jung,&nbsp;Raehyeong Lee,&nbsp;Mihee Park,&nbsp;Minjoon Park","doi":"10.1007/s11814-025-00446-9","DOIUrl":"10.1007/s11814-025-00446-9","url":null,"abstract":"<div><p>LiFePO₄ (LFP) batteries are a promising choice for electric vehicles and energy storage systems owing to their excellent long cycle life, thermal stability, and high energy density. Various strategies have been studied, including advancements in LFP active materials, electrolyte additives, current collectors, and binders. Despite the ongoing research, the practical fabrication of both LFP cathodes and lithium metal anodes (LMAs) remains challenging, limiting their industrial application. In addition to advancements in cathode materials, extensive research has been dedicated to lithium (Li) metal batteries to improve energy density. However, challenges associated with Li metal anodes, such as Li volume expansion and dendrite growth, often result in short circuits during Li plating/stripping processes. To address these issues, various strategies have been explored, including enhancing the lithiophilicity of Cu current collectors and utilizing 3D host structures. This review discusses the design and strategies for performance enhancement of various LFP electrodes and Li metal and, with emphasis on the development of materials and cell design.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 7","pages":"1427 - 1451"},"PeriodicalIF":3.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cytotoxic Effects of Particulate Matter on Cell Growth and Metabolism of Green Fluorescent Protein-Expressing Escherichia coli","authors":"Young Hoon Song,&nbsp;Hye Ryoung Heo,&nbsp;Ae Sol Lee,&nbsp;Chang Sup Kim,&nbsp;Jeong Hyun Seo","doi":"10.1007/s11814-025-00457-6","DOIUrl":"10.1007/s11814-025-00457-6","url":null,"abstract":"<div><p>The toxicity of sulfate (SO₄⁻²) and ammonium (NH₄⁺), key components of fine dust, on living organisms was investigated using recombinant green fluorescent protein (GFP)-expressing <i>Escherichia coli</i> as a bioindicator. The effects of individual and mixed particulate matter (PM) compounds, including CuSO₄, (NH₄)₂SO₄, and NH₄Cl, were evaluated by measuring the optical density and GFP fluorescence intensity. <i>Escherichia coli</i> growth was inhibited by the individual compounds at specific thresholds, with CuSO₄ being most toxic at as low as 3.8 mM. Synergistic effects were observed with mixed compounds, markedly reducing growth and fluorescence even at lower concentrations. Notably, a mixture of the three at their sub-lethal individual concentrations completely halted bacterial growth after 2 h of incubation. CuSO₄ was a more potent inhibitor than (NH₄)₂SO₄ and NH₄Cl. These findings highlighted the importance of analyzing the individual and synergistic effects of PM components.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 9","pages":"2123 - 2129"},"PeriodicalIF":3.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent Progress of Materials Design and Engineering of Aqueous Metal-Air Batteries","authors":"Joohyuk Park,&nbsp;Yeonguk Son","doi":"10.1007/s11814-025-00456-7","DOIUrl":"10.1007/s11814-025-00456-7","url":null,"abstract":"<div><p>Aqueous metal-air batteries have received great attention as possible candidates for environmentally sustainable energy storage systems (ESS) based on their high energy density, high safety and low cost. Particularly, a variety of aqueous metal-air batteries have been studied for practical application. However, there are limitations arising from the intrinsic properties of their components and battery designs. To address these drawbacks, a wide range of materials have been developed as promising components for next-generation aqueous metal-air batteries. This review focuses on recent progress in materials design and engineering of aqueous metal-air batteries including Zn–, Al–, Mg– and Fe–air batteries, which highlights the development of novel materials and fabrication of innovative battery systems based on the metal anode, air cathode, aqueous electrolyte and electrocatalysts. Furthermore, flexible and flow batteries are intensively introduced as advanced aqueous metal-air batteries for future electronic devices. On the basis of these viewpoints, this review provides a future direction for the commercialization of aqueous metal-air batteries.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 7","pages":"1491 - 1505"},"PeriodicalIF":3.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlling the Primary Particle of High-Nickel Cobalt-Free Cathodes for Highly Stable Lithium-Ion Batteries","authors":"Yun-Jae Song,&nbsp;Hyo-Jin Ahn","doi":"10.1007/s11814-025-00447-8","DOIUrl":"10.1007/s11814-025-00447-8","url":null,"abstract":"<div><p>Lithium-ion batteries (LIBs) are bright energy-storage devices owing to their superior energy density and low memory effects. High-nickel cobalt-free Li[Ni_0.9Mn_0.1]O₂ (NM90) is a promising cathode material owing to its high energy density, low cost, and nontoxicity. However, high-Ni cathodes suffer from cation disordering and short lifecycle properties. Therefore, we fabricated well-aligned primary particles by controlling the concentration of chelating agents during co-precipitation. Appropriately aligned primary particles facilitated the transport of lithium ions, and the Mn ions in NM90 provided frameworks with highly stable structures. The fabricated NM90_4.8 M electrodes exhibited superior cathode performances, including a noticeable specific capacity of 149.9 mAh/g with an outstanding capacity retention of 87.4% after 100 cycles during a current density of 1C and a superior discharge specific capacity of 196.1 mAh/g at a current density of 0.2C. The NM90_4.8 M cathode can provide the next-generation active materials that afford long-life and ultrafast LIBs, which are discussed in terms of cost efficiency.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 8","pages":"1683 - 1692"},"PeriodicalIF":3.2,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}