Korean Journal of Chemical Engineering最新文献

{"title":"Carbon Nanotube–Polymer Composite Coating on the Anode Surface for Enhancing the Performance of Zn-Ion Batteries","authors":"Hyeonjun Lee, Sung-Oong Kang, Geon‐Hyoung An","doi":"10.1007/s11814-024-00190-6","DOIUrl":"https://doi.org/10.1007/s11814-024-00190-6","url":null,"abstract":"","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141100612","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":"Integrated Melamine Molecules on Microspherical Boehmite Particles via Spray Drying for Highly Efficient CO2/N2 Adsorption Separation","authors":"Van Nhieu Le,&nbsp;Duy Quang Dao,&nbsp;Hai Bang Truong,&nbsp;Huu Trung Nguyen,&nbsp;Toan Minh Pham,&nbsp;Jongwook Park,&nbsp;Jinsoo Kim","doi":"10.1007/s11814-024-00194-2","DOIUrl":"10.1007/s11814-024-00194-2","url":null,"abstract":"<div><p>A newly developed spherical boehmite and melamine composite with a mesoporous structure was successfully fabricated through a spray drying system utilizing a mixture of boehmite sol and melamine. EDX–SEM, FTIR, and TGA analyses confirmed the integration of melamine into the boehmite network within the resulting composite. With an increase in melamine content, the composites exhibited a gradual reduction in porosity compared to their pristine boehmite counterpart. However, the CO₂ uptake of the composites continued to demonstrate improvement. The boehmite sample modified with 5 mol% of melamine (IMB#5) demonstrated the highest CO₂ adsorption capacity at 19.2 cm³ g⁻¹. This value surpassed the original boehmite sample by 46.1% under conditions of 25 °C and 1 bar. The enhanced adsorption can be attributed to the development of adsorptive affinity facilitated by N-derived functional groups (–NH₂ and  –CN) within the melamine structure and their interaction with CO₂. As a result, the CO₂/N₂ separation factor and CO₂/N₂ adsorptive selectivity using the ideal adsorbed solution theory (IAST) over the IMB#5 sample were 113.3 and 3182, respectively, approximately 3 times and 9.2 times higher than those for the boehmite sample. Density functional theory (DFT) calculations were conducted to investigate the interaction of melamine on the boehmite surface, as well as the selective adsorption of CO₂ and N₂ gaseous molecules on the boehmite/melamine composite. It is shown that the melamine mainly interacts with the boehmite via a strong binding of the N atom of the triazine ring with the Al atom of the boehmite. The adsorption of CO₂ has lower binding enthalpies and free energies than that of N₂. These findings indicate that utilizing continuous spray drying holds promise as an effective pathway for scaling up the production of mesoporous boehmite/melamine composite spheres as CO₂ selective adsorbents.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141103978","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":"MgO-Modified Activated Carbon Fibers for Enhanced Adsorption of Toluene: Efficiency and Mechanism","authors":"Wenjuan Wu,&nbsp;Han He,&nbsp;Wei Chu,&nbsp;Baoguo Lin,&nbsp;Pan Wang,&nbsp;Chengzhu Zhu","doi":"10.1007/s11814-024-00196-0","DOIUrl":"10.1007/s11814-024-00196-0","url":null,"abstract":"<div><p>To enhance the surface functionalities of activated carbon fiber (ACF), the impregnation and high-temperature calcination methods were utilized to effectively load magnesium oxide on ACF. Dynamic adsorption tests were carried out to examine the impact of different doping amounts and calcination temperatures with respect to the adsorption performance of MgO/ACF on toluene, and it was characterized by SEM, XRD, N₂ ad-desorption isotherms and FT-IR technique. When Mg/ACF mass ratio was 3% and a calcination temperature of 550 °C, the Mg_0.03/ACF-550 composite material revealed the optimum adsorption capacity of toluene was 230.8 mg/g, which was 31% higher than the original ACF, and it could be regenerated and permitting reuse for multiple cycles. Its adsorption process of toluene occurred via a combination of surface adsorption and pore-filling mechanisms.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141103540","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":"Validation of Effectiveness Factor Correlations for Steam Methane Reforming in Ni-Based Washcoat Catalyst Layers Using Commercial Computational Fluid Dynamics Software","authors":"Yun Seok Oh,&nbsp;Hyun-Joo Oh,&nbsp;Jin Hyun Nam","doi":"10.1007/s11814-024-00186-2","DOIUrl":"10.1007/s11814-024-00186-2","url":null,"abstract":"<div><p>In this study, the effectiveness factor correlations proposed for steam methane reforming (SMR) in Ni-based washcoat catalyst layers were numerically validated using the commercial computational fluid dynamics (CFD) software, ANSYS Fluent. The SMR process in an exemplary microchannel reformer was simulated, once by fully considering the reaction and diffusion process within the washcoat catalyst layer and again by simplifying the process calculation using the effectiveness factor correlations. It was shown that the proposed effectiveness factor correlations could successfully capture the SMR characteristics in the washcoat catalyst layer, with a discrepancy of approximately 0.1% point in the overall methane conversion ratio in the validation test, while reducing the calculation time by a factor of 1/5 for the same number of iterations. All these results clearly demonstrated that accurate and cost-effective CFD simulation of the steam reformer operation is possible using the proposed effectiveness factor correlations. Finally, this paper also addressed a possible numerical anomaly in the Fluent calculation identified during the present simulation.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141114815","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":"Systematic Narrowing of ZIF-8 Apertures via Controlled 2-Ethylimidazole Doping for Hydrogen/Carbon Dioxide Separation","authors":"Lee Yang,&nbsp;Sunghwan Park,&nbsp;Wong Zhong Han,&nbsp;Musab Abdul Razak,&nbsp;Lee Yong Zhen,&nbsp;Muhammed Faires,&nbsp;Rozita Omar,&nbsp;Thomas Shean Yeaw Choong,&nbsp;Rosiah Rohani,&nbsp;Mohamad Rezi Abdul Hamid","doi":"10.1007/s11814-024-00192-4","DOIUrl":"10.1007/s11814-024-00192-4","url":null,"abstract":"<div><p>Sodalite (SOD) zeolitic-imidazolate frameworks (ZIFs) with uniform angstrom scale apertures can offer high gas sieving ability for separation applications. Fixed apertures of ZIFs can effectively separate specific gas pair but may not be able to provide similar level of separation for larger or smaller gas pairs. Multivariate (i.e., mixed-linker) ZIFs with controlled linker incorporation can provide desired aperture tuning but difficult to synthesize especially when incorporating linkers that would normally form different structures. Herein, we report a systematic narrowing of SOD ZIF-8 by partially replacing 2-methylimidazole (mIm) linkers of ZIF-8 with 2-ethylimidazole (eIm) via delayed linker addition (DLA) method. Percentages of eIm in the hybrid frameworks were determined to be around 14.3%, 9.1%, and 5.1% for ZIF-8 nuclei formed in 5, 12.5, and 20 min, respectively. Ethyl moiety of eIm restricts framework flexibility of the hybrid ZIF-8, shifts ZIF-8 gate-opening pressure to higher value, and eventually diminishes the gate-opening effect. Polysulfone (PSF)-based mixed-matrix membranes utilizing eIm-doped ZIF-8 as fillers displayed slight reduction in CO₂ permeability (18.56 Barrer to 14.85 Barrer) which result in H₂/CO₂ ideal selectivity improvement. DLA method is expected to work well for other imidazole-based linkers and can perhaps be used to synthesize mixed-linker of other SOD ZIFs.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141119492","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":"Preparation of PVDF Microporous Membranes via Combining TIPS with Rolling Embossing for Water-in-Oil Emulsions Separation","authors":"Qichao Sun,&nbsp;Zhensheng Yang,&nbsp;Zhiying Wang,&nbsp;Lianying Wu","doi":"10.1007/s11814-024-00187-1","DOIUrl":"10.1007/s11814-024-00187-1","url":null,"abstract":"<div><p>Superhydrophobic microporous membranes have great application prospects in oil–water separation. The stability of micro-rough structures on the surface of hydrophobic membranes is a challenge in the oil–water separation process. In this regard, it is crucial to develop a simple method to prepare stable superhydrophobic membranes. This article prepared superhydrophobic polyvinylidene fluoride (PVDF) membranes, employing a combination of thermally induced phase separation (TIPS) with rolling embossing. The gel state of the membrane surface is the key core for the success of the process, for which the effect of pre-evaporation time on the membrane properties was explored. A turning point in the gel curve occurred at a pre-evaporation time of 1.5 min, when the gel state of the membrane was most suitable for rolling. The surface of the embossed membrane shows a micron–submicron hierarchical structure reminiscent of the lotus leaf surface, and the surface of the membrane presents a water contact angle of 151° and a solid contact angle of 9.5°. The micrometer submicron hierarchical structure exhibits excellent mechanical stability in friction experiments, with a water contact angle only reduced by 7.9° after 50 sandpaper frictions. Cross-flow filtration was significantly superior to dead-end filtration in oil–water separation, the embossed membrane maintained a high flux of 1234 L•m⁻²•h⁻¹ and a retention rate (α) of 99.10%. Meanwhile, the embossed membrane can remove 100% of mechanical impurities and water from waste diesel fuel. This study provides certain ideas and methods for the preparation of superhydrophobic microporous membranes.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141118893","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":"Investigating the Pyrolysis Properties of Cellulose and Lignin Isolated from Different Turkish Biomass Using TG-FTIR","authors":"Levent Ballice","doi":"10.1007/s11814-024-00189-z","DOIUrl":"10.1007/s11814-024-00189-z","url":null,"abstract":"<div><p>In this study, the devolatilization behavior of eastern Mediterranean hazelnut, almond, and sunflower residue was studied using a TGA–FTIR laboratory-scale setup. The original biomasses were fractionated using the Van Soest detergent analysis. Both the original and fractionated biomasses were investigated. The reaction temperature was increased to 900 °C using a heating rate of 2 °Cmin⁻¹. The pyrolysis of lignin produced the largest gas production, with CO₂ constituting up the bulk of the gas mixture. CO is the second highest-yield gas and is primarily formed from the samples of cellulose and lignin. For the lignin samples, the pyrolysis operation yielded the maximum amount of char, while the combustion of the lignin chars produced the highest amount of gas yields. On the other hand, lignin samples, particularly almond lignin, have the lowest tar production. Due to the high ash content the sunflower stalk sample devolatilized at a lower temperature with respect to the rest of the samples, resulting at a mass loss peak at lower temperature. The hazelnut lignin showed the mass loss peak at the highest temperature. Generally, CO₂ showed the highest mass yield, and it was mainly produced from the cellulose and whole biomass samples. Among all samples CH₄ was produced in minor quantities and mostly in lignin devolatilization. Furthermore, the devolatilization behavior of the fractionated biopolymers is not enough to sufficiently predict the behavior of the whole biomass sample. The results described in this paper can help further the understanding of thermal processes where almond, hazelnut, and sunflower residues from the eastern Mediterranean region, and their fractionated-derived products are involved.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141120020","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":"Correction: Progresses and Challenges of Machine Learning Approaches in Thermochemical Processes for Bioenergy: A Review","authors":"Nafiu Olanrewaju Ogunsola,&nbsp;Seung Seok Oh,&nbsp;Pil Rip Jeon,&nbsp;Jester Lih Jie Ling,&nbsp;Hyun Jun Park,&nbsp;Han Saem Park,&nbsp;Ha Eun Lee,&nbsp;Jung Min Sohn,&nbsp;See Hoon Lee","doi":"10.1007/s11814-024-00191-5","DOIUrl":"10.1007/s11814-024-00191-5","url":null,"abstract":"","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141121860","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":"Variable Time Delay-Based Granger Causality Approach Integrated with Dynamic Coupling Analysis for Root Cause Diagnosis in Chemical Processes","authors":"Yuting Li,&nbsp;Xu Yang,&nbsp;Jian Huang,&nbsp;Jingjing Gao","doi":"10.1007/s11814-024-00180-8","DOIUrl":"10.1007/s11814-024-00180-8","url":null,"abstract":"<div><p>Due to the dynamic characteristics of chemical industry systems, the time delay tends to be variable, which leads to changes in coupling intensity. This is contrary to the assumptions in causal analysis, where the time delay and the coupling are typically assumed to be fixed. In this article, a new causal analysis framework that integrates Granger causality with dynamic coupling analysis based on variable time delay is proposed, which not only fully considers the variable time delay in dynamic processes, but also studies the dynamic change of coupling intensity. First, the moving window is used to explore real-time variations in average mutual information to obtain the variable time delay. Then by further analyzing the normal data, the dynamic coupling relationship caused by continuous changes in time delay is distinguished. On this basis, the extended Granger causality and convergent cross mapping are integrated to relax their assumptions of fixed time delay and coupling. Finally, the direction of fault propagation is guided by the results of causal analysis. The effectiveness of proposed method is demonstrated by chemical industry case studies.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140963013","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":"Correction: Preparation, Characterization, and Application of Electrospun BAG/CMC/β-CD Nanofibers for Flutamide Drug Delivery","authors":"Masoumeh Tajik,&nbsp;Mirabdullah Seyed-Sadjadi,&nbsp;Karim Zare,&nbsp;Nazanin Farhadyar","doi":"10.1007/s11814-024-00185-3","DOIUrl":"10.1007/s11814-024-00185-3","url":null,"abstract":"","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412227","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}