Korean Journal of Chemical Engineering最新文献

{"title":"Enhanced CO2 Sequestration Strategy Using CO2 Capturing Material Synthesized from Spent Railway Tie Concrete","authors":"Hyung-Jun Jang, Gyubin Lee, Heeji Yoo, Jae-Yong Lee, Hye-Jin Hong","doi":"10.1007/s11814-024-00214-1","DOIUrl":"https://doi.org/10.1007/s11814-024-00214-1","url":null,"abstract":"<p>Lots of railway tie concrete waste are produced which needs appropriate treatment for disposal. This study introduces a novel strategy for converting railway tie concrete waste into a highly efficient CO₂ capturing material (RTC). To enhance the CO₂ capturing capabilities, a CaCl₂ solution was employed as a modifying agent (Ca-RTC). The introduction of a 0.001 M CaCl₂ solution increased the Ca content in Ca-RTC by only 0.08% compared to unmodified RTC, yet it significantly enhanced porosity and surface area. This modification led to an 11.57% of excellent CO₂ capturing ability, which is 2.5 times greater than that of the original RTC. Even though the Ca content is similar in RTC and Ca-RTC, the significant increase in BET surface area led to a notable improvement in CO₂ capturing ability. However, increasing the CaCl₂ concentration beyond 0.005 M resulted in a reduction of CO₂ capturing ability, attributed to the inhibitory effect of Cl⁻ ions. The kinetics of the CO₂ capturing reaction and the impact of CO₂ pressure on Ca-RTC were systematically investigated. Finally, the CO₂ capturing mechanism of Ca-RTC was elucidated.</p>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740855","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":"Chelating Cellulose for Removal of Heavy Metals","authors":"Jingxin Zheng,&nbsp;Lu Yang,&nbsp;Nan You,&nbsp;Baohong Ding,&nbsp;Hongtao Fan","doi":"10.1007/s11814-024-00230-1","DOIUrl":"10.1007/s11814-024-00230-1","url":null,"abstract":"<div><p>Cellulose is a renewable and promising material. However, native cellulose has to face the challenge of the removal of heavy metals with low efficiency which limits its application. In this work, a cellulose derivative with EDTA-like chelating groups (EDTA-CL) is designed and prepared by the chemical grafting of cellulose. Cellulose is partially oxidized to dialdehyde cellulose which is treated with 20% excess of diethylenetriamine through a Schiff base reaction for the preparation of the aminated cellulose. The amine groups of the aminated cellulose are carboxymethylated by reacting with 20% excess of bromoacetic acid through a substitution reaction. The high-efficient adsorption of the both ions by the EDTA-CL with high adsorptive amounts (Pb²⁺: 438.3 mg g⁻¹ and Cd²⁺: 287.2 mg g⁻¹) can be accomplished by controlled parameters (pH of 4–6, contact time of 30 min and the dosage of 1 g L⁻¹). The adsorptive processes of the both ions onto the EDTA-CL can be well fitted by pseudo-second-order and Langmuir equations. Thermodynamics data reveal that the adsorption of the both ions onto the EDTA-CL is a spontaneous and endothermic process. The loaded EDTA-CL can be regenerated five times with loss of adsorptive amounts (Cd²⁺: 14% and Pb²⁺: 17%).</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 9","pages":"2729 - 2739"},"PeriodicalIF":2.9,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740967","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":"Phase Equilibria of Binary Mixtures of 3-Chloro-2-Hydroxypropyl Methacrylate and 2-N-Morpholinoethyl Methacrylate in Supercritical Carbon Dioxide","authors":"Divya Baskaran,&nbsp;Cheol-Woong Park,&nbsp;Uma Sankar Behera,&nbsp;Hun-Soo Byun","doi":"10.1007/s11814-024-00219-w","DOIUrl":"10.1007/s11814-024-00219-w","url":null,"abstract":"<div><p>This study presents exceptional perception into the phase transition behavior of binary mixtures containing 3-chloro-2-hydroxypropyl methacrylate (3C2HM) or 2-N-morpholinoethyl methacrylate (2NMEM) in supercritical CO₂ at different operating temperatures (313.2–393.2 K) and pressures (3.36–33.90 MPa). The findings are expected to significantly contribute to the evolution of advanced materials and technologies in several industrial sectors. As temperature increases at constant pressure, carbon dioxide (CO₂) solubility in the monomer aqueous phase decreases. However, the solvability of the binary systems improved with temperature and mole fraction at steady pressure. The 2NMEM component exhibited higher polarizability and lower surface tension than the 3C2HM monomer, making it less soluble in CO₂, which is a nonpolar compound. The solution phase of the binary systems exhibited Type I phase behavior, and the phase diagrams were nearly identical. The experimental solubility data were adequately correlated with the Peng–Robinson equation of state with the aid of molecular interaction parameters (IPs) which was evaluated at 353.2 K. The optimized molecular IPs were nearly zero, confirming that both binary systems were nearly ideal mixture systems as the temperature increased. The model precision was evaluated by calculating the percentage of root-mean-square deviation (RSD%) at five temperatures using the molecular IPs. The calculated RSD% of the CO₂ + 3C2HM and CO₂ + 2NMEM systems were 4.70% and 4.91%, respectively, indicating that the model values fit reasonably well. Therefore, the predicted phase behavior agrees well with the experimental phase transitions of both systems. The characteristics of the critical solution curve were simulated to realise the interactions and transition behavior of the studied binary systems. This is the first study to demonstrate the solubility of CO₂ + 3C2HM and CO₂ + 2NMEM chemical mixtures, and it will be significant for chemical industries.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 9","pages":"2675 - 2689"},"PeriodicalIF":2.9,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141650759","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":"Mechanochemical Synthesis of Multicomponent Bismuth-Based Molybdate Catalysts for Propylene Ammoxidation to Produce Acrylonitrile","authors":"ChangJin Han,&nbsp;Jeong Hwan Chun,&nbsp;Chan Hun Kim,&nbsp;Do Heui Kim","doi":"10.1007/s11814-024-00218-x","DOIUrl":"10.1007/s11814-024-00218-x","url":null,"abstract":"<div><p>Activities and structures of metal oxide catalysts significantly rely on the synthesis procedures and conditions. In this study, a novel solvent-free mechanochemical method was employed to prepare catalysts for the ammoxidation of propylene. Multicomponent oxide catalysts containing bismuth, iron, cobalt, and molybdenum were successfully synthesized using a ball mill mixer and zirconia jars without the use of nitric acid. The mechanochemically synthesized catalysts exhibited higher catalytic performance than traditional catalysts prepared by coprecipitation (CP) and rotary evaporation (RE) methods in propylene ammoxidation. The synergistic effect of the mechanochemical method was investigated using various analyses, such as inductively coupled plasma atomic emission spectroscopy (ICP-AES), X-ray diffraction (XRD), scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). ICP-AES analysis revealed that the ball-mill-based catalysts contained metal elements in designated amounts more accurately than those prepared by the CP or RE methods. Propylene ammoxidation reactions with ball-milled catalysts showed a synergistic effect and improved acrylonitrile yield, especially at a 50:50 wt% ratio of Bi₂Mo₃O₁₂ to Fe_0.36Co_0.64MoO₄. Comprehensive analyses, including XRD, SEM–EDS, Raman spectroscopy, and XPS, support the conclusion that the improved performance of the mechanochemically synthesized catalysts can be attributed to the increased interaction between different phases prepared under mechanical forces, leading to a favorable change in the oxidation state of iron.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 9","pages":"2541 - 2551"},"PeriodicalIF":2.9,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568673","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":"Biofilm Dynamics in Fluoride-Based Wastewater Systems: A Mini-Review on Pseudomonas spp. and Bacillus spp. Biofilms in Semiconductor Manufacturing WWTP","authors":"Jiaqiao Zhong,&nbsp;Yueshuang Wang,&nbsp;Quan Quan,&nbsp;Yuanzhe Li","doi":"10.1007/s11814-024-00217-y","DOIUrl":"10.1007/s11814-024-00217-y","url":null,"abstract":"<div><p>Biofilm formation and growth is a significant concern for water treatment professionals, as it can lead to the contamination of water systems and pose a threat to public health. Biofilms are complex communities of microorganisms that adhere to surfaces and are embedded in an extracellular matrix of polysaccharides and proteins. They are notoriously difficult to control, as they provide a protective environment for bacteria, viruses, and other harmful organisms to grow and proliferate. This review article highlights some of the factors that favor biofilm growth, as well as various strategies for controlling biofilm in water systems. Adopting the best available technologies, such as wellhead protection programs, proper distribution system maintenance, and filtration and disinfection, can prevent the formation and growth of biofilms in water systems. A comprehensive and multi-faceted approach to biofilm control can reduce the occurrence of biofilms and ensure the delivery of high-quality water to consumers.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 9","pages":"2495 - 2509"},"PeriodicalIF":2.9,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11814-024-00217-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568672","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":"Enhancing the Performance of LiFePO4 Cathodes in Li-ion Batteries: Role of Surface Coating Based on ZIF-8 Particle Size Optimization","authors":"Hyeonjong Seo, Jihyeon Kang, Hoyu Kim, Seohyeon Jang, Jae Hyun Kim, Seyoung Choi, Hojong Eom, Ohhyun Kwon, Junhyeop Shin, Jongkwon Park, Doehyeob Yoo, Seoyeon Jeong, Seong Hyeon Noh, Chang Wan Park, Myeong-Lok Seol, Soomin Park, Inho Nam","doi":"10.1007/s11814-024-00215-0","DOIUrl":"https://doi.org/10.1007/s11814-024-00215-0","url":null,"abstract":"<p>LiFePO₄ (LFP) cathodes are widely used in Li-ion batteries (LIBs) due to their stable voltage, environmental friendliness, abundance, and resilience. However, challenges such as insufficient electron/ion transfer and compromised structural integrity under high-rate conditions limit their performance. Surface coating has emerged as a viable strategy to enhance the stability and cycling performance of LFP cathodes; however, achieving an exceptional rate performance with an optimal coating structure remains challenging. This study was conducted to explore the feasibility of enhancing the electrochemical performance of LFP electrodes using zeolitic imidazolate framework-8 (ZIF-8) coatings, with a focus on optimizing the ZIF-8 particle size. The cycling stability and rate capability of the ZIF-8-incorporated LFP electrodes were superior compared to those of uncoated LFP. Electrodes with ZIF-8 sizes of 150 nm, 500 nm, and 1.1 μm demonstrated discharge capacities of 180, 187, and 179 mA h g⁻¹, respectively, at 0.1 C and 86, 94, and 85 mA h g⁻¹, respectively, at 10 C. Notably, the 500 nm ZIF-8 particles showed the greatest decrease in charge transfer resistance (<i>R</i>_<i>ct</i>), enhancing the overall performance and indicating a high capacity retention ratio. This study provides crucial insights into the optimal particle size of ZIF-8 for coating LFP electrodes as well as valuable guidance for enhancing LIB performances.</p>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568674","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":"Research Progress on Gas Generation from Waste Plastics Through Pyrolysis","authors":"Ji Guangxiong,&nbsp;Liu Bingguo,&nbsp;Luo Guolin,&nbsp;Yuwen Chao,&nbsp;Peng Fang,&nbsp;Gong Siyu,&nbsp;Guo Shenghui,&nbsp;Chen Wang,&nbsp;Hou Keren","doi":"10.1007/s11814-024-00216-z","DOIUrl":"10.1007/s11814-024-00216-z","url":null,"abstract":"<div><p>Plastic pyrolysis technology, as an efficient and stable path for chemical recycling of waste plastics, alleviates current energy pressures and solves the problem of continuous accumulation of waste plastics in the environment. At present, the vast majority of research on plastic pyrolysis is focused on how to improve the yield and quality of liquid fuels, while there is generally little research on the gases generated by plastic pyrolysis. However, gases such as H₂, CH_4, and light hydrocarbons generated during pyrolysis also have high utilization value, and have very considerable application prospects in chemical, aerospace, and metallurgical fields. In addition, compared with the separation difficulties of liquid products, the treatment of gas products is easier and more conducive to subsequent utilization. This article discusses and analyzes the yield and composition of gases generated by plastic in three different pyrolysis methods: direct pyrolysis, catalytic pyrolysis, and microwave pyrolysis. Compared to traditional direct pyrolysis, catalytic pyrolysis and microwave pyrolysis can treat plastic waste more efficiently and energy-efficient, and have higher gas yields. This article also discusses various factors such as temperature that influence the formation of gas products and their importance. Finally, the challenges faced are proposed, aiming to provide reference and direction for future research on improving the yield of gas generated by plastic pyrolysis.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 9","pages":"2477 - 2493"},"PeriodicalIF":2.9,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568675","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":"Emission Factor Estimation Using Monte Carlo Simulation: Focusing on the Development of Dioxin Emission Factors in Cremation Facilities","authors":"Mi Hyeon Lee,&nbsp;Young-Kwon Park","doi":"10.1007/s11814-024-00211-4","DOIUrl":"10.1007/s11814-024-00211-4","url":null,"abstract":"<div><p>In this study, data from 23 domestic cremation facilities measured for 5 years (from 2016 to 2020) of 13 domestic cremation facilities was used to calculate the emission factors of dioxins (PCDD/DFs) of cremation facilities that use Liquified Natural Gas (LNG) as combustion fuel. We performed a statistical analysis for the first time to estimate the emission factor using limited measurement results from cremation facilities that are not easily accessible. We attempted to identify the emission concentration of dioxin as a representative persistent organic pollutants substance and developed a statistically based dioxin emission factor. The concentration of dioxins (PCDD/DFs) in the cremation facility ranged 0.001–4.440 ng I-TEQ/Sm³ with an average concentration of 0.719 ng I-TEQ/Sm³. The emission factor calculated using the 23 measured data showed 0.010–21.485 μg I-TEQ/Cremation. A Monte Carlo Simulation was conducted using probability density distribution and parameter estimation. Consequently, 10,000 emission factors were selected, and the Pareto distribution was predicted to be the most appropriate probability density distribution. The emission factor values through Monte Carlo simulation showed a minimum value of 1.490 × 10–08 μg I-TEQ/Cremation and a maximum value of 7816 μg I-TEQ/Cremation. The average value was calculated as 39.920 μg I-TEQ/Cremation. Each parameter of the Pareto distribution is shape parameter (<i>α</i>) 1.026, location parameter (<i>μ</i>) – 1.021, and scale parameter (<i>λ</i>) 1.021. As a result of this study, the median value of the cumulative density function was selected as a representative value for the dioxin emission factor of cremation facilities and the emission factor was 0.986 μg I-TEQ/ Cremation. The 95% confidence interval in the Pareto distribution was presented as 0.026 μg I-TEQ/Cremation to 36.216 μg I-TEQ/ Cremation.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 9","pages":"2607 - 2619"},"PeriodicalIF":2.9,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141550876","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":"Ultrathin Glass-Based Perovskite Solar Cells Employing Bilayer Electron Transport Layer","authors":"Wooyeon Kim, Jian Cheng, Joonwon Choi, Seoyeong Lee, Yongwoo Lee, Doyeon Lee, Min Jae Ko","doi":"10.1007/s11814-024-00213-2","DOIUrl":"https://doi.org/10.1007/s11814-024-00213-2","url":null,"abstract":"<p>In recent studies, flexible perovskite solar cells (PSCs) have exhibited high power conversion efficiency (PCE) coupled with remarkable mechanical stability. However, the conventional polymer substrates used in flexible PSCs possess high permeability to moisture and oxygen, leading to the rapid degradation of perovskite materials. In this work, we address these issues by employing ultrathin glass (UTG) substrates, which provide moisture impermeability while retaining flexibility. Additionally, we introduce a strategically designed SnO₂/TiO₂ bilayer as the electron transport layer (ETL). Our results reveal that PSCs incorporating the bilayer ETL achieve higher PCE than those with a monolayer ETL on conventional glass and UTG substrates. Furthermore, moisture permeability tests demonstrate that PSCs based on UTG substrates sustain their PCE over time, compared to their polymer-based counterparts. These results imply that UTG substrates, combined with a SnO₂/TiO₂ bilayer ETL, offer a promising solution for developing durable, high-performance, flexible PSCs suitable for long-term applications.</p>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"39 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141550878","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":"Production of Glycerol-Free Biodiesel Using Pollen-Derived CaO Heterogeneous Catalyst","authors":"Ying Tang,&nbsp;Meng Li,&nbsp;Guangtao Li,&nbsp;Yi Yang,&nbsp;Ying Yang","doi":"10.1007/s11814-024-00212-3","DOIUrl":"10.1007/s11814-024-00212-3","url":null,"abstract":"<div><p>Rape pollen with fishnet-like network structure has been used as support in the construction of high dispersion CaO materials assigned to CaO(P) (“P” was symbol of the precipitation method). Effect of various preparation conditions such as calcination temperature was evaluated following the performance for no-glycerol biodiesel preparation. The relatively well activity was observed by yielding to no-glycerol biodiesel of 92.69% in the rapeseed 1/1/8 mixture of oil–methyl acetate–methanol at 65 °C for 3 h over 10 wt% of 1/1-CaO(P)-700 which is better than 80% over commercial CaO. In addition, the catalytic performance of reused catalyst was also investigated. TGA–DSC and BET studies showed that the catalyst has good thermal stability and high surface area with hierarchical microstructures with large and mesopores on the surface, respectively. Furthermore, hierarchical basicity has been also established which provided various active sites for the heterogeneous reaction.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 9","pages":"2639 - 2650"},"PeriodicalIF":2.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532183","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}