Korean Journal of Chemical Engineering最新文献

{"title":"Critical Review of Heterogeneous Catalysts: Manufacturing of Fuel from Waste Plastic Pyrolysis","authors":"Amarsinh L. Jadhav,&nbsp;Parvez A. Gardi,&nbsp;Prajeet A. Kadam","doi":"10.1007/s11814-024-00273-4","DOIUrl":"10.1007/s11814-024-00273-4","url":null,"abstract":"<div><p>The escalating demand for plastic presents an immense peril to both the environment and humanity. Not only have there been notable advancements in the creation of advanced biodegradable polymers, but there has also been a lack of attention towards tackling the current issue of plastic waste. Processing fuels via plastic waste valorization provides a feasible approach to recycle plastics and mitigating pollution for the improvement of society. This review addresses a comprehensive analysis of various heterogeneous catalysts in the context of plastic pyrolysis to produce fuel, intending to identify an eco-friendly method for recycling garbage. The choice of catalyst has a substantial effect on the disintegration process of waste plastic, dictating the properties of the resulting fuel, encompassing both the amount and the quality. Pyrolysis, an alternative method for addressing the increasing waste disposal issue, is a non-toxic process that does not release hazardous pollutants, in contrast to incineration. The waste plastic serves as a feedstock for pyrolysis process, employing innovative, environmentally friendly catalysts derived from natural and other sources, to generate fuel oil that possesses similar physical characteristics to the diminishing petroleum-based fuels. This critical review analyzes the impact of different heterogeneous catalysts on the process of transforming waste plastic to produce fuel through pyrolysis. Heterogeneous catalysts are crucial to the process of turning discarded plastics into oil, offering significant potential for improving not only economic and environmental conditions but also benefiting both industry and society.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 11","pages":"2937 - 2960"},"PeriodicalIF":2.9,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213141","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":"Artificial Flexible Sensory Electronics Mimicking Human Somatosensory System","authors":"Seungjae Lee, Hyejin Lee, Geonyoung Jung, Min Sub Kwak, Young-Ryul Kim, Hyunhyub Ko","doi":"10.1007/s11814-024-00272-5","DOIUrl":"https://doi.org/10.1007/s11814-024-00272-5","url":null,"abstract":"<p>Recent advancements in human–machine interfaces (HMIs), the Internet of Things (IoT), healthcare, and robotics have driven the need for technologies facilitating natural and intuitive interactions between users and devices. Central to this development are bio-inspired sensory electronics that emulate the sophisticated structures and functions of human sensory organs. This review comprehensively explores the latest advancements in flexible sensory electronics, which draw inspiration from the human somatosensory system, specifically tactile, auditory, and gustatory organs, to enhance user experiences in various applications. We discuss the underlying biological sensing mechanisms of each sensory organ and provide an overview of the materials, structures, and performances of devices that mimic them. For tactile sensors, we introduce fingertip-skin-inspired interlocked microstructures and mechanoreceptor-inspired multiple transduction modes that enable the detection and discrimination of static and dynamic tactile stimuli. In the auditory domain, we discuss cochlear-inspired acoustic sensors with frequency selectivity that allow for advanced sound processing and manipulation. Finally, artificial taste sensors integrated with taste receptor proteins or mimicking structures closely replicate human taste perception. The application of these human-inspired sensors in user-interactive interfaces, such as haptic-feedback rings for virtual reality, sound-driven robotics, and robotic taste-sensing systems, demonstrates their potential to revolutionize various fields. By understanding and mimicking biological sensory mechanisms, the development of artificial sensory electronics will continue to drive innovation in flexible sensory electronics and enhance user experiences through multimodal sensory integration.</p>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"101 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213077","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":"Zirconium(IV)-Loaded Amino Functionalized Walnut Shell for Efficient Adsorption of Phosphate and 2,4-Dichlorophenoxyacetic Acid from Water","authors":"Xiaoxuan Ma,&nbsp;Lihui Chen,&nbsp;Evan Dovi,&nbsp;Lingbo Qu,&nbsp;Runping Han","doi":"10.1007/s11814-024-00224-z","DOIUrl":"10.1007/s11814-024-00224-z","url":null,"abstract":"<div><p>A cost-effective adsorbent (AWS@Zr) was synthesized from walnut shell using Zirconium and amino group modification for the uptake of 2,4-dichlorophenoxyacetic acid (2,4-D) and phosphate (PO₄³⁻). Characterization of the adsorbents revealed a significant difference in the physicochemical parameters of pristine and functionalized walnut shell. Langmuir model was observed to predict adsorption of 2,4-D, while Freundlich model best-fitted PO₄³⁻ adsorption with chemisorption being the principal underlying mechanism. The adsorption phenomena were pH dependent with Langmuir maximum capacity of 227.4 ± 5.4 mg g⁻¹ and 73.9 ± 3.2 mg g⁻¹ for 2,4-D and PO₄³⁻, respectively. Kinetic models were also used to analyze the experimental data, and remarkable determined coefficients favor the pseudo-second-order kinetic model for the batch systems. The column experiments were carried out as a function of adsorbates flow rate, initial feed of 2,4-D and PO₄³⁻ concentration, bed depth. The results indicated both Thomas and Clark models could predict uptake of 2,4-D and phosphate with Thomas maximum capacity as 195.5 ± 1.0 for 2,4-D and 87.4 ± 0.7 mg g⁻¹ for PO₄³⁻ at optimum flow rate of 10 mL min⁻¹ and bed depth of 6 cm. Moreover, the column isotherm studies revealed that the Langmuir model predicted the adsorption data of PO₄³⁻, and 2,4-D, which was consistent with batch adsorption of 2,4-D. The studied pollutants onto AWS@Zr are PO₄³⁻ &gt; 2,4-D based on the <i>β</i>⁻¹ obtained from the column’s mass transfer analysis. Adsorption–desorption studies revealed the reusability potentials of AWS@Zr. Zr and amino in surface of AWS@Zr play major role during removal of 2,4-D and PO₄³⁻. There is potential for AWS@Zr to remove some anionic pollutants from solution.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 11","pages":"3075 - 3093"},"PeriodicalIF":2.9,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213135","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":"Experimental Performance Evaluation of a Multi-stream Heat Exchanger for Integration of High-Temperature Steam Electrolysis with Nuclear Reactor Systems","authors":"Sin-Yeob Kim,&nbsp;Byung Ha Park,&nbsp;Sung-Deok Hong,&nbsp;Chan Soo Kim","doi":"10.1007/s11814-024-00270-7","DOIUrl":"10.1007/s11814-024-00270-7","url":null,"abstract":"<div><p>Printed-circuit type multi-stream heat exchanger was designed and fabricated to produce high-temperature steam and air simultaneously from high-temperature helium heated using the helium loop, which is simulating VHTR (Very-High Temperature gas-cooled Reactor). This study describes the design methodology and the heat transfer performance evaluation results of the multi-stream heat exchanger for stable supply of high temperature steam and air to a 30 kWe SOEC (solid-oxide electrolyzer cell) system to produce hydrogen with high-temperature nuclear reactor systems. In order to control the steam supply above 700 ℃, the steam supply control methodology was established with a pressure control valve between the multi-stream heat exchanger and a steam generator. In this study, 20 kg/hr of steam over 800 ℃ and 110 SLPM of air over 750 ℃ were supplied stably with the multi-stream heat exchanger using helium loop. The heat transfer performance evaluation for steam is 1.1% below the design condition, which meets the design value within the error range. However, for air, the heat transfer was found to be 50.6% less than the design value due to a decrease in flow rate and reduced heat transfer performance caused by the formation of a deposition layer along the flow path. This high-temperature steam and air supply system will be connected with a high-temperature steam electrolysis system to perform the integral hydrogen production test using helium loop.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 10","pages":"2901 - 2912"},"PeriodicalIF":2.9,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213136","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":"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}

{"title":"Effects of Hydrothermal Carbonization Process Parameters on Physicochemical Properties and Combustion Behavior of Maize Stalk Hydrochars","authors":"Zhenghao Zhang,&nbsp;Xin Shen,&nbsp;Yingyi Zhang,&nbsp;Zhichen Han,&nbsp;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>_<i>i</i>), and burnout temperature (<i>T</i>_<i>f</i>) 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⁻¹, 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}

{"title":"Underlying Developments in Hydrogen Production Technologies: Economic Aspects and Existent Challenges","authors":"L. Samylingam,&nbsp;Navid Aslfattahi,&nbsp;Chee Kuang Kok,&nbsp;K. Kadirgama,&nbsp;Michal Schmirler,&nbsp;T. Yusaf,&nbsp;D. Ramasamy,&nbsp;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}

{"title":"Compost as Green Adsorbent for the Azo Dyes: Structural Characterization and Dye Removal Mechanism","authors":"Joanna Kyziol-Komosinska,&nbsp;Agnieszka Dzieniszewska,&nbsp;Sylwia Pasieczna-Patkowska,&nbsp;Anna Kołbus,&nbsp;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}

{"title":"Electrochemical Monitoring for Molten Salt Pyroprocessing of Spent Nuclear Fuel: A Review","authors":"Wonseok Yang,&nbsp;Richard I. Foster,&nbsp;Jihun Kim,&nbsp;Sungyeol Choi","doi":"10.1007/s11814-024-00260-9","DOIUrl":"10.1007/s11814-024-00260-9","url":null,"abstract":"<div><p>Pyroprocessing holds the key to unlocking a more sustainable future for nuclear energy by handling various types of spent nuclear fuel (SNFs) and reducing radioactive waste volumes. This review examines the role of electrochemical monitoring in molten salt pyroprocessing of SNFs, emphasizing its importance in enhancing process efficiency and nonproliferation. Challenges associated with the monitoring of multi-element environments, flow environments, and sensor stability are discussed. The review suggests that integrating sensor technology with artificial intelligence could lead to significant advancements in the field.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 10","pages":"2781 - 2797"},"PeriodicalIF":2.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213142","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":"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 CO₂ 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_th 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_x and NO_x emissions were examined. The experimental results showed that the CO₂ 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, NO₂, N₂O, and SO₂ emissions were measured to assess their environmental impact. Moreover, cofiring tests using biomass under pressurized oxy-fuel conditions (5 bar (g), 30% O₂:70% CO₂) 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}