Korean Journal of Chemical Engineering最新文献_第6页

Time-Lapse Traces of Transformation of CdTe Nanoparticles into Nanowires via Self-Assembly 碲化镉纳米颗粒通过自组装转化为纳米线的延时轨迹

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-25 DOI: 10.1007/s11814-024-00267-2

Jeong Won Kang, Insol Jo, Yeungchan Kim, Hyoungbum Kim, Ki-Sub Kim

{"title":"Time-Lapse Traces of Transformation of CdTe Nanoparticles into Nanowires via Self-Assembly","authors":"Jeong Won Kang, Insol Jo, Yeungchan Kim, Hyoungbum Kim, Ki-Sub Kim","doi":"10.1007/s11814-024-00267-2","DOIUrl":"10.1007/s11814-024-00267-2","url":null,"abstract":"<div><p>Nanostructures formed by self-assembly of semiconductor nanoparticles have unique properties that make them useful in various fields. In particular, cadmium telluride is being actively studied in the field of solar cells on the strengths of its long-term stability and low cost. In this study cadmium telluride nanoparticles were synthesized into nanowires in the dark and their evolutionary process was investigated. Thioglycolic acid was selected from among several thiol-based stabilizers. A ratio of 1.4:1 (thioglycolic acid to cadmium ion) was used rather than the traditional 2.4:1 ratio. In this study, nanowires were prepared by self-assembly of nanoparticles and the process of forming straight nanowires was observed. Synthesized nanowires were observed by using a scanning electron microscope and a transmission electron microscope, and the synthesized nanostructures were characterized. The wavelength of photoluminescence was converted from 549.9 nm to 553.3 nm as nanoparticles transformed into nanowires in an aqueous solution. The nanowire solution did not precipitate even after 60 days. The suggested synthetic procedure thus provides a viable pathway for the fabrication of nanomaterials.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 12","pages":"3245 - 3249"},"PeriodicalIF":2.9,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453003","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}

引用次数: 0

GPT Prompt Engineering for a Large Language Model-Based Process Improvement Generation System 基于大型语言模型的流程改进生成系统的 GPT 提示工程

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-24 DOI: 10.1007/s11814-024-00276-1

Donghyeon Lee, Jaewook Lee, Dongil Shin

{"title":"GPT Prompt Engineering for a Large Language Model-Based Process Improvement Generation System","authors":"Donghyeon Lee, Jaewook Lee, Dongil Shin","doi":"10.1007/s11814-024-00276-1","DOIUrl":"10.1007/s11814-024-00276-1","url":null,"abstract":"<div><p>Process design improvements require extensive knowledge, considerable time, and huge human resources due to the complexity of chemical processes and their diverse objective functions. However, machine learning-based approaches using vast accumulated data are limited in low versatility, applicable only to specific processes, and unable to understand the basis of model decisions. This study proposes the GPT-based Improved Process Hybrid Transformer (GIPHT), a process design improvement generation system utilizing Large Language Model (LLM). LLMs, being natural language-based, allow for understanding the basis of model decisions without need of explainable AI analysis. GIPHT is composed of multi-agent to enhance versatility and performance for diverse chemical processes. We also propose the Detailed Simplified Flowsheet Input Line Entry System format to express process diagrams in natural language, including enhanced information about process conditions. A structured prompt system is employed and validated in the LLM domain through prompt engineering. GIPHT searches and extracts data based on its proposed improvement methodology, providing explanations for the decision-making process and the basis, overcoming limitations of the traditional black-box AI models. It offers directional ideas to design engineers in the early stages of process design and would be used for training of process engineers, supporting improvement of outdated processes and transformation into more environmentally friendly processes.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 12","pages":"3263 - 3286"},"PeriodicalIF":2.9,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452959","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}

引用次数: 0

Identification of Representative Wind Power Fluctuation Patterns for Water Electrolysis Device Stress Testing: A Data Mining Approach 用于水电解装置压力测试的代表性风电波动模式识别：数据挖掘方法

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-23 DOI: 10.1007/s11814-024-00286-z

Kyong Jin Choi, Sanghoon Kim, Yongchai Kwon, Min Kyu Sim

{"title":"Identification of Representative Wind Power Fluctuation Patterns for Water Electrolysis Device Stress Testing: A Data Mining Approach","authors":"Kyong Jin Choi, Sanghoon Kim, Yongchai Kwon, Min Kyu Sim","doi":"10.1007/s11814-024-00286-z","DOIUrl":"10.1007/s11814-024-00286-z","url":null,"abstract":"<div><p>Wind power generation is expected to greatly contribute to the future of humanity as a promising source of renewable energy. However, the high variability inherent in wind is a challenge that hinders stable power generation. To utilize wind power as a primary energy source, integration with a polymer electrolyte membrane water electrolysis (PEMWE) system is proposed. Yet, PEMWE is known to suffer from degradation when exposed to input power patterns with high variability. This poses challenges to its commercialization. This necessitates stress testing with various wind power fluctuations during the production process of the devices. This study investigates representative patterns of wind power fluctuation so that these patterns can be used for the stress testing process. We employ data-mining techniques, including the swing door algorithm and k-means clustering, to identify these patterns by analyzing wind power generation data at a 10-s interval. As a result, the five most representative wind power ramps are presented. This study provides practical guidelines for the development process of expensive devices for wind power generation, thereby promoting the active utilization of wind power generation.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 12","pages":"3251 - 3262"},"PeriodicalIF":2.9,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452918","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}

引用次数: 0

Design of Ionic Liquids for HF/HFC-245fa Superefficient Separation: COSMO-RS Selection and Process Assessment 设计用于 HF/HFC-245fa 超高效分离的离子液体：COSMO-RS 选择和工艺评估

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-21 DOI: 10.1007/s11814-024-00282-3

Yuan-Hao Liao, Jijun Zeng, Zhiqiang Yang, Sheng Han, Bo Zhao, Yu an, Xiaobo Tang, Tao Yu, Wei Zhang, Jian Lu

{"title":"Design of Ionic Liquids for HF/HFC-245fa Superefficient Separation: COSMO-RS Selection and Process Assessment","authors":"Yuan-Hao Liao, Jijun Zeng, Zhiqiang Yang, Sheng Han, Bo Zhao, Yu an, Xiaobo Tang, Tao Yu, Wei Zhang, Jian Lu","doi":"10.1007/s11814-024-00282-3","DOIUrl":"10.1007/s11814-024-00282-3","url":null,"abstract":"<div><p>Recycling hydrofluoric acid (HF) is a significant issue within the field of organofluoride chemistry. A key obstacle in this endeavor lies in the separation of azeotropic mixtures containing HF, such as the azeotropic mixture of HF and 1,1,1,3,3-pentafluoropropane (HFC-245fa), which exhibit similar boiling points. This study investigates the application of extractant distillation (ED) with ionic liquids (ILs) to achieve the separation of HF/HFC-245fa at the molecular scale, cell dimension, and systematic level (including the optimization and analysis of ED). COSMO-RS was employed to identify the suitable IL, with [Tf<sub>2</sub>N]-based ILs emerging as the most optimal extractants. Four representative [Tf<sub>2</sub>N]-based ILs were chosen based on their physical properties and thermodynamic behavior, and were applied in a continuous ED process simulation for the separation of HF/HFC-245fa using Aspen Plus, resulting in the production of 99.5 mol% HFC-245fa and 99.5 mol% HF. The determination of the optimal operational parameters was carried out through sequential quadratic programming, considering the purity requirements. An assessment of energy consumption analysis indicated that [C<sub>1</sub>Py][Tf<sub>2</sub>N] stands out as the most suitable IL for separation of HF/HFC-245fa, with heat and cooling duties of 467.82 kW and 304.80 kW, respectively. Economic analysis for the process with [C<sub>1</sub>Py][Tf<sub>2</sub>N] indicated that the annual operating costs and equipment costs are $ 5.58 × 10<sup>4</sup> and $ 3.75 × 10<sup>6</sup>, respectively, of which the costs of IL are 93%, the total annual cost was comparable to that of the pressure-swing distillation process, suggesting that this ED process utilizing ILs for separating azeotropes is economically viable in terms of industrial application.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 12","pages":"3163 - 3178"},"PeriodicalIF":2.9,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452984","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}

引用次数: 0

Enhanced Photocatalytic Activity of Bio-Mediated Ag@Cu2O NPs Towards Fampridine: Kinetic Modelling and Mechanistic Pathways 增强生物介导的 Ag@Cu2O NPs 对氨吡啶的光催化活性：动力学模型和机理途径

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-21 DOI: 10.1007/s11814-024-00283-2

Pratibha Attri, Sangeeta Garg, Jatinder Kumar Ratan, Ardhendu Sekhar Giri

{"title":"Enhanced Photocatalytic Activity of Bio-Mediated Ag@Cu2O NPs Towards Fampridine: Kinetic Modelling and Mechanistic Pathways","authors":"Pratibha Attri, Sangeeta Garg, Jatinder Kumar Ratan, Ardhendu Sekhar Giri","doi":"10.1007/s11814-024-00283-2","DOIUrl":"10.1007/s11814-024-00283-2","url":null,"abstract":"<div><p>To enhance the photocatalytic activity of Cu<sub>2</sub>O NPs, <i>Tabernaemontana divaricata</i> leaf extract was used to synthesize Ag@Cu<sub>2</sub>O NPs. The synthesized Ag@Cu<sub>2</sub>O NPs were characterized using UV–Vis, XPS, XRD, and HR-TEM. The mechanism of Ag onto Cu<sub>2</sub>O NPs showed that the plant extract was fully saturated with flavonoids and can implant Ag onto Cu<sub>2</sub>O NPs. XPS spectra showed a shift towards lower binding energy for Cu 2<i>p</i> peaks from 932 to 931 eV and 952 to 951 eV, which confirmed the formation of Ag@Cu<sub>2</sub>O NPs. HR-TEM investigation indicated that the lattice distance was <i>d</i> = 0.25 nm which corresponds to the (111) plane of Ag, hence demonstrating the fabrication of Ag@Cu<sub>2</sub>O NPs. The degradation efficiency of fampridine was enhanced using Ag@Cu<sub>2</sub>O NPs to 95% with 97% chemical oxygen demand (COD) removal and 75% total organic carbon (TOC) conversion after 210 min of reaction time compared to Cu<sub>2</sub>O NPs. The modified first-order kinetic (MFOK) model was well fitted for the TOC conversion of fampridine, with <i>R</i><sup>2</sup> = 0.99 as compared to the first-order kinetic (FOK) model. Liquid chromatography–mass spectroscopy (LC–MS) spectra for the degradation of fampridine showed ten intermediate fragments. The synthesized Ag@Cu<sub>2</sub>O NPs also showed a high inhibition zone for the two different bacterial pathogens.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 12","pages":"3191 - 3211"},"PeriodicalIF":2.9,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452958","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}

引用次数: 0

Improving Quantum Dot Stability Against Heat and Moisture with Cyclic Olefin Copolymer Matrix 利用环烯烃共聚物基质提高量子点的耐热耐湿稳定性

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-18 DOI: 10.1007/s11814-024-00278-z

Seon Hui Baek, Seung Jae Kim, Ho Seok Heo, Kangtaek Lee

{"title":"Improving Quantum Dot Stability Against Heat and Moisture with Cyclic Olefin Copolymer Matrix","authors":"Seon Hui Baek, Seung Jae Kim, Ho Seok Heo, Kangtaek Lee","doi":"10.1007/s11814-024-00278-z","DOIUrl":"10.1007/s11814-024-00278-z","url":null,"abstract":"<div><p>Quantum dots (QDs) are widely studied for their superior optical properties. However, maintaining their stability requires effective protection against heat and moisture. This research aims to enhance the stability of QDs by embedding them in cyclic olefin copolymer (COC). Our findings show that nanocomposites containing green- and red-emitting QDs in COC exhibited enhanced transparency and dispersion when compared to those using other common polymers, such as polydimethylsiloxane (PDMS) and poly(methyl methacrylate) (PMMA). Stability test under harsh conditions (85 °C and 85% relative humidity) confirmed the robustness of the QDs within the COC matrix compared to the PDMS and PMMA matrices. In addition, a white-light-emitting diode (LED) device was successfully fabricated by integrating a blend of green- and red-emitting QDs in COC-based nanocomposites atop a blue LED chip. This setup demonstrated potential for use in light-emitting devices that demand high luminous efficiency and transparency, even under extreme conditions. The study highlights the potential of COC as an alternative to traditional polymers, enhancing the performance and durability in display technologies.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3461 - 3468"},"PeriodicalIF":2.9,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250446","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}

引用次数: 0

Synthesis Strategies and Applications of Non-toxic Quantum Dots 无毒量子点的合成策略与应用

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-16 DOI: 10.1007/s11814-024-00279-y

Yunmo Sung, Jaewon Chang, Sukyung Choi, Sanghwa Jeong

引用次数: 0

Mechanically Robust Transparent Conducting Electrodes for Flexible Perovskite Solar Cells 用于柔性 Perovskite 太阳能电池的机械稳健型透明导电电极

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-14 DOI: 10.1007/s11814-024-00280-5

Unsoo Kim, Jieun Lee, Yun Seog Lee, Mansoo Choi

{"title":"Mechanically Robust Transparent Conducting Electrodes for Flexible Perovskite Solar Cells","authors":"Unsoo Kim, Jieun Lee, Yun Seog Lee, Mansoo Choi","doi":"10.1007/s11814-024-00280-5","DOIUrl":"10.1007/s11814-024-00280-5","url":null,"abstract":"<div><p>Perovskite solar cells (PSCs) offer unique advantage of enabling lightweight and flexible power sources compared to the commercially available rigid wafer-based silicon solar cells, while their power conversion efficiencies are now nearly comparable. To ensure high performance, flexibility and lightweight characteristics in flexible perovskite solar cells and modules, it is essential to develop electrodes that are highly conductive, highly transparent, flexible and thin. In this review, we first highlight important technical metric, figure of merits (FoM), that reflects not only the optical and electrical properties of the transparent electrodes but also their mechanical flexibility. Then, we review recent advancements in transparent conductive electrodes for flexible perovskite solar cells, focusing on various materials and designs including conducting polymers, metal nanowires and meshes, carbon-based nanomaterials, transparent conducting oxides and other novel materials. Lastly, we discuss the challenges and future prospects toward commercialization of flexible perovskite solar modules.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 14","pages":"3677 - 3692"},"PeriodicalIF":2.9,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250447","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}

引用次数: 0

Thermal Analysis of the Gelation Process of Li-ion Battery Polymer Electrolyte by Electron Irradiation Using Multi-physics Simulation 利用多物理场仿真对电子辐照下锂离子电池聚合物电解质凝胶化过程进行热分析

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-12 DOI: 10.1007/s11814-024-00271-6

Woojien Lee, Jaehyeon Kim, Taeshik Earmme, Kunok Chang

{"title":"Thermal Analysis of the Gelation Process of Li-ion Battery Polymer Electrolyte by Electron Irradiation Using Multi-physics Simulation","authors":"Woojien Lee, Jaehyeon Kim, Taeshik Earmme, Kunok Chang","doi":"10.1007/s11814-024-00271-6","DOIUrl":"10.1007/s11814-024-00271-6","url":null,"abstract":"<div><p>Rechargeable lithium-based batteries play a crucial role in the shift towards renewable energy, providing eco-friendly alternatives to fossil fuels and improving sustainability. However, their liquid electrolytes present significant safety risks, especially in electric vehicles. To address this, the process of gelation through cross-linking has emerged as a promising solution, effectively reducing the risk of combustion. Traditional gelation methods are time-consuming and costly, often taking up to an hour. In contrast, electron beam irradiation provides a highly efficient alternative, reducing the process to just seconds. This lowers production costs and meets the demands of high-volume manufacturing. In this study, the multiphysical phenomena in the coin cell were simulated using, which combines radiation transport modeling, phase change simulation of the gelation process, and thermal analysis. Through this, the peak temperature of the electrolyte in the coin cell was predicted and the time required for the temperature of the electrolyte to return to the ambient temperature was predicted.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 1","pages":"165 - 177"},"PeriodicalIF":2.9,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213072","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}

引用次数: 0

Pore Size Control Mechanism of a Rigid Polyurethane Foam 硬质聚氨酯泡沫的孔径控制机制

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-12 DOI: 10.1007/s11814-024-00275-2

Junsu Chae, Yoonki Lee, Siyoung Q. Choi

引用次数: 0