Korean Journal of Chemical Engineering最新文献_第4页

A Scale-Up of Fluidized Bed Granulation Process for Calcium–Tryptophan 扩大色氨酸钙流化床造粒工艺的规模

IF 2.7 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-09-03 DOI: 10.1007/s11814-024-00269-0

Hyeongseok Han, WooChang Sung, Jun-Woo Kim, Kyochan Kim, DongHyun Lee

{"title":"A Scale-Up of Fluidized Bed Granulation Process for Calcium–Tryptophan","authors":"Hyeongseok Han, WooChang Sung, Jun-Woo Kim, Kyochan Kim, DongHyun Lee","doi":"10.1007/s11814-024-00269-0","DOIUrl":"https://doi.org/10.1007/s11814-024-00269-0","url":null,"abstract":"<p>The importance of tryptophan in both human and animal nutrition continues to drive its demand and market growth. To enhance the usability of tryptophan products, such as flowability, bulk density, and mixing efficiency, the fluidized bed granulation process plays a critical role in the industrial production of tryptophan from microbial fermentation. This process involves a simplified method of evaporation and granulation to efficiently produce commercial granular products. This study conducted a solid flow analysis for scaling up fluidized bed granulators in the manufacturing of calcium–tryptophan granules, focusing on the solid flow characteristics, the flow regime within the granulator, and the granulator's design considerations. The scale-up case for calcium–tryptophan granules revealed that the bubbling fluidization flow regime occurred similarly at both pilot and plant scales. Then, the transport disengaging height to minimize fine particle loss inside the fluidized bed granulator and the entrainment rate to secure the capacity of entrained particle recovery equipment such as cyclones or bag filters were determined to obtain basic design data for scale-up of the fluidized bed granulation process.</p>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"19 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213134","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

Effects of Hydrothermal Carbonization Process Parameters on Physicochemical Properties and Combustion Behavior of Maize Stalk Hydrochars 水热碳化工艺参数对玉米秸秆水合赭石理化性质和燃烧行为的影响

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-08-31 DOI: 10.1007/s11814-024-00265-4

Zhenghao Zhang, Xin Shen, Yingyi Zhang, Zhichen Han, Chunyin Zhang

{"title":"Effects of Hydrothermal Carbonization Process Parameters on Physicochemical Properties and Combustion Behavior of Maize Stalk Hydrochars","authors":"Zhenghao Zhang, Xin Shen, Yingyi Zhang, Zhichen Han, Chunyin Zhang","doi":"10.1007/s11814-024-00265-4","DOIUrl":"10.1007/s11814-024-00265-4","url":null,"abstract":"<div><p>Hydrothermal carbonization (HTC) is an effective method to improve the performance of biomass fuels. In this work, the reusable maize stalk (MS) hydrochars were prepared at different carbonization conditions, and the effects of carbonization parameters on physicochemical properties, recovery rate, coalification mechanism and combustion behavior of MS hydrochars were investigated. The results show that with the increase of temperature and time, the particle size, O/C and H/C ratios, flammability index and comprehensive combustion characteristic index of MS hydrochars decrease gradually, while the calorific value, ignition temperature (<i>T</i><sub><i>i</i></sub>), and burnout temperature (<i>T</i><sub><i>f</i></sub>) increase gradually. The combustibility and combustion reactivity of MS hydrochars are significantly better than anthracite. Under the optimal carbonization conditions (260 ºC, 40 min, solid–liquid ratio of 2%), MS hydrochar has a high carbon content and calorific value, and the carbon content and calorific value of MS are 66.85 and 22.36 MJ·kg<sup>−1</sup>, respectively. HTC technology can effectively transform MS biomass into high energy density solid fuel, which provides a theoretical basis for expanding the application field of hydrochars.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 11","pages":"3035 - 3051"},"PeriodicalIF":2.9,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213137","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

Underlying Developments in Hydrogen Production Technologies: Economic Aspects and Existent Challenges 制氢技术的基本发展：经济方面和现有挑战

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-08-31 DOI: 10.1007/s11814-024-00264-5

L. Samylingam, Navid Aslfattahi, Chee Kuang Kok, K. Kadirgama, Michal Schmirler, T. Yusaf, D. Ramasamy, M. F. Ghazali

{"title":"Underlying Developments in Hydrogen Production Technologies: Economic Aspects and Existent Challenges","authors":"L. Samylingam, Navid Aslfattahi, Chee Kuang Kok, K. Kadirgama, Michal Schmirler, T. Yusaf, D. Ramasamy, M. F. Ghazali","doi":"10.1007/s11814-024-00264-5","DOIUrl":"10.1007/s11814-024-00264-5","url":null,"abstract":"<div><p>The quest for a carbon–neutral energy future has positioned hydrogen as a pivotal player in global-sustainability efforts. This comprehensive review examines the transformative role of hydrogen in revolutionizing sustainable energy consumption. Hydrogen’s high energy density, versatility, and minimal ecological footprint make it ideal for stabilizing the intermittent nature of renewable energy sources. This study evaluates the latest advancements in hydrogen production technologies, including advanced electrolysis, reforming strategies, and biologic processes, assessing their operational efficiencies and environmental impacts. In addition, it explores the strategic deployment of hydrogen in transportation, industrial processes, and electricity sectors, highlighting its potential to significantly reduce fossil-fuel dependence and mitigate climate change. The economic considerations and policy imperatives crucial for the global adoption and scaling of hydrogen storage systems are also discussed. This review underscores hydrogen’s critical role in creating an eco-efficient and resilient energy infrastructure, advocating for an accelerated transition to hydrogen-based solutions to achieve a cleaner, greener planet.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 11","pages":"2961 - 2984"},"PeriodicalIF":2.9,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213139","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

Compost as Green Adsorbent for the Azo Dyes: Structural Characterization and Dye Removal Mechanism 堆肥作为偶氮染料的绿色吸附剂：结构特征与染料去除机理

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-08-30 DOI: 10.1007/s11814-024-00254-7

Joanna Kyziol-Komosinska, Agnieszka Dzieniszewska, Sylwia Pasieczna-Patkowska, Anna Kołbus, Justyna Czupioł

{"title":"Compost as Green Adsorbent for the Azo Dyes: Structural Characterization and Dye Removal Mechanism","authors":"Joanna Kyziol-Komosinska, Agnieszka Dzieniszewska, Sylwia Pasieczna-Patkowska, Anna Kołbus, Justyna Czupioł","doi":"10.1007/s11814-024-00254-7","DOIUrl":"10.1007/s11814-024-00254-7","url":null,"abstract":"<div><p>The study aimed to determine the feasibility of using compost as a ‘green adsorbent’ for the removal of five anionic azo dyes belonging to the monoazo, disazo and trisazo classes: Direct Red 81 (DR-81), Direct Blue 74 (DB-74), Reactive Blue 81 (RB-81), Reactive Red 198 (RR-198) and Acid Black 194 (ABk-194) from aqueous solutions. The adsorption capacity of the compost was determined using a batch method with initial dye concentrations ranging from 1 to 1000 mg/L. The kinetics of dye removal followed a pseudo-second-order model, indicating chemisorption as the rate-limiting step. The monoazo dyes RB-81, RR-198 and ABk-194 with the smaller molecule size were adsorbed the fastest. The Langmuir and Sips models best fit the adsorption system with maximum adsorption capacities in the range of 12.64 mg/g (RR-198)—20.92 mg/g (ABk-194) and 12.57 mg/g (RR-198)—25.43 mg/g (ABk-194), respectively. The adsorption depended on the dye structure, especially on the ratio of the numbers of proton donors to proton acceptor locations in functional groups. The differences in the adsorption mechanism could be explained by thermodynamic properties such as dipole moments, HOMO–LUMO energy gap, polarizability, electron affinity, ionization potential, electronegativity and chemical hardness obtained by Density Functional Theory.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 12","pages":"3227 - 3243"},"PeriodicalIF":2.9,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11814-024-00254-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213140","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}

引用次数: 0

Electrochemical Monitoring for Molten Salt Pyroprocessing of Spent Nuclear Fuel: A Review 乏核燃料熔盐热处理的电化学监测：综述

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-08-28 DOI: 10.1007/s11814-024-00260-9

Wonseok Yang, Richard I. Foster, Jihun Kim, Sungyeol Choi

引用次数: 0

Experimental Study of Oxy-fuel Combustion and Emission Characteristics Using a 10 kWth Pressurized Fluidized Bed Combustor 使用 10 千瓦时加压流化床燃烧器的纯氧燃料燃烧和排放特性实验研究

IF 2.7 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-08-25 DOI: 10.1007/s11814-024-00258-3

Dong-Won Kim, Jong-Min Lee, Gyu-Hwa Lee, Kyoungil Park

{"title":"Experimental Study of Oxy-fuel Combustion and Emission Characteristics Using a 10 kWth Pressurized Fluidized Bed Combustor","authors":"Dong-Won Kim, Jong-Min Lee, Gyu-Hwa Lee, Kyoungil Park","doi":"10.1007/s11814-024-00258-3","DOIUrl":"https://doi.org/10.1007/s11814-024-00258-3","url":null,"abstract":"<p>Pressurized oxy-fuel combustion (POFC) is a promising carbon capture and storage technology because of its ability for efficient CO<sub>2</sub> capture and storage at a relatively low cost. However, the experimental studies conducted on this technology considering pressurized conditions are limited compared with those conducted considering atmospheric conditions. Thus, further investigation on the performance and environmental emissions of oxy-fuel combustion is necessary. In this study, oxy-fuel combustion experiments were conducted using a 10 kW<sub>th</sub> fluidized bed combustion (FBC) test rig at pressures ranging from 3 to 8 bar (g). The effects of combustion pressure, oxygen concentration, and cofiring with different fuels on combustion temperature, unburned carbon, combustion efficiency, as well as SO<sub>x</sub> and NO<sub>x</sub> emissions were examined. The experimental results showed that the CO<sub>2</sub> concentration in the flue gas exceeds 90% in all POFC scenarios, thus facilitating the carbon capture process. In addition, by increasing the combustion pressure, the unburned carbon and CO concentrations in the fly ash are reduced, thereby improving combustion efficiency. Furthermore, the variations in NO, NO<sub>2</sub>, N<sub>2</sub>O, and SO<sub>2</sub> emissions were measured to assess their environmental impact. Moreover, cofiring tests using biomass under pressurized oxy-fuel conditions (5 bar (g), 30% O<sub>2</sub>:70% CO<sub>2</sub>) showed that these conditions are more environmentally sustainable and efficient than other combustion methods for producing energy in a fluidized bed by burning a mixture of coal and biomass.</p>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"101 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213146","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

Modified Sucrose Biochar Goethite (α-FeOOH): A Potential Adsorbent for Methylene Blue Removal 改性蔗糖生物炭沸石（α-FeOOH）：去除亚甲基蓝的潜在吸附剂

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-08-23 DOI: 10.1007/s11814-024-00237-8

Van-Truc Nguyen, Nguyen Duy Dat, Quoc-Hoang Do, Vu-Anh Le, Quoc-Minh Truong, Thanh-Binh Nguyen, Anh Thi Kim Tran, My Linh Nguyen, Nhung Thi-Tuyet Hoang, Tran Thi Ai My, Thi-Dieu-Hien Vo

{"title":"Modified Sucrose Biochar Goethite (α-FeOOH): A Potential Adsorbent for Methylene Blue Removal","authors":"Van-Truc Nguyen, Nguyen Duy Dat, Quoc-Hoang Do, Vu-Anh Le, Quoc-Minh Truong, Thanh-Binh Nguyen, Anh Thi Kim Tran, My Linh Nguyen, Nhung Thi-Tuyet Hoang, Tran Thi Ai My, Thi-Dieu-Hien Vo","doi":"10.1007/s11814-024-00237-8","DOIUrl":"10.1007/s11814-024-00237-8","url":null,"abstract":"<div><p>The primary purpose of this study is to synthesize biochar (Fe-SB) derived from sucrose through hydrothermal carbonization coupling with goethite activation and utilize it as an adsorbent to remove methylene blue (MB). FTIR, SEM, and BET were used to analyze the biochar characterization. Factors affecting the adsorption of MB on Fe-SB, including temperature, pH, salt, and different water sources, were also meticulously investigated. SEM results indicate that the morphology of the biochar derived from sucrose has a spherical shape, and the goethite crystal has a needle-like structure that successfully deposits on the adsorbent. The specific surface area of Fe-SB is 568 m<sup>2</sup>/g and contains enormous functional groups of O–H, C = C, and C–O. In the condition of pH 8, Fe-SB had a maximum adsorption capability of 476.2 mg/g. The adsorption capacity of biochar for MB removal consists of various adsorption mechanisms. In conclusion, Fe-SB, a novel material, pinpoints a promising and environmentally friendly adsorbent for the removal of MB from aquatic environment.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 11","pages":"3127 - 3138"},"PeriodicalIF":2.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213143","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

Correction: Enhanced CO2 Sequestration Strategy Using CO2 Capturing Material Synthesized from Spent Railway Tie Concrete 更正：利用废旧铁轨轨枕混凝土合成的二氧化碳捕集材料强化二氧化碳封存战略

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-08-22 DOI: 10.1007/s11814-024-00261-8

Hyung-Jun Jang, Gyubin Lee, Heeji Yoo, Jae-Young Lee, Hye-Jin Hong

引用次数: 0

A CPFD Simulation on Hydrodynamics of Carbon Nanotube Aggregates in a Fluidized Bed 流化床中碳纳米管聚集体流体力学的 CPFD 模拟

IF 2.7 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-08-19 DOI: 10.1007/s11814-024-00257-4

Suyoung Kim, Min Ji Lee, Ye Ji Chang, Yujin Go, Geunhye Won, Sung Won Kim

{"title":"A CPFD Simulation on Hydrodynamics of Carbon Nanotube Aggregates in a Fluidized Bed","authors":"Suyoung Kim, Min Ji Lee, Ye Ji Chang, Yujin Go, Geunhye Won, Sung Won Kim","doi":"10.1007/s11814-024-00257-4","DOIUrl":"https://doi.org/10.1007/s11814-024-00257-4","url":null,"abstract":"<p>A computational particle–fluid dynamics (CPFD) model of a fluidized bed reactor with carbon nanotube (CNT, <i>d</i><sub><i>p</i></sub> = 485 μm) particles was established. A drag model and coefficient were determined to simulate the hydrodynamic behavior of CNTs in a fluidized bed. The drag coefficient reflected the variation in physical properties owing to CNT agglomeration, such as aggregate size distribution, particle circularity, and apparent density. The Richardson–Davidson–Harrison model with a drag coefficient of 0.17 was chosen based on results on solid holdup distribution. The proposed CPFD model described hydrodynamic behaviors, such as bed expansion, solid holdup distribution, and relative standard deviation (RSD) of the pressure drop with gas velocity, and predicted the transition gas velocity between the partial and complete fluidization regimes. The bed expansion and RSD gradually increased with increasing gas velocity in the partial fluidization regime and rapidly increased at the beginning of the complete fluidization regime. The increased gas velocity significantly enhanced bed expansion and particle entrainment, resulting in the formation of large CNT aggregates and a higher solid holdup in the freeboard in the complete fluidization regime. The simulated results describe the behavior of CNT aggregates near the bed surface and in the freeboard region, supporting previous findings in the literature. Uneven local gas flows occurred in the bed and freeboard regions, and the results described the bubbling bed characteristics in the complete fluidization regime.</p>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"23 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213144","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

Nanoparticle Doped Polymers for Radiation Shielding: A Review 掺杂纳米粒子的辐射屏蔽聚合物：综述

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-08-18 DOI: 10.1007/s11814-024-00256-5

Anupama V. Joshi, K. Shastry, Gagana Velur, Bhoomika R. Holla

{"title":"Nanoparticle Doped Polymers for Radiation Shielding: A Review","authors":"Anupama V. Joshi, K. Shastry, Gagana Velur, Bhoomika R. Holla","doi":"10.1007/s11814-024-00256-5","DOIUrl":"10.1007/s11814-024-00256-5","url":null,"abstract":"<div><p>Radiation-shielding is essential in fields involving storage and transport of radiation active material, such as medicine and nuclear engineering. The risk of radiation spill is a source of constant concern with its potential impact on local environment and life. Radiation spills that occur in laboratory are considered minor and containment of radiations in such cases using conventional techniques is not practical. Current practice involves using a suitable chemical absorbent, cleaning the spill region using agents and requires monitoring the spill region regularly for activity. Although this technique is effective in managing minor/laboratory grade spills, it requires careful application and constant monitoring before the area can be deemed safe for work. In this paper, we provide a detailed review of the radiation-shielding properties of polymer nanocomposites and their fabrication. The paper outlines radiation-shielding mechanisms, measurement of radiation attenuation, and factors that influence radiation attenuation. The review also compares analytical attenuation measurement methods against experimental methods. This review would be helpful in not only understanding the underlying energy transfer mechanism, but also aid in exploring polymer nano-composite materials as a viable green option for containing medium to low-level radiation spills.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 11","pages":"2985 - 3003"},"PeriodicalIF":2.9,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227012","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