Korean Journal of Chemical Engineering最新文献

{"title":"Optimization of Biodiesel Yield and Cost Analysis from Waste Cooking Oil Using Box–Behnken Design with TiO2–ZnO-Based Nano-catalyst","authors":"Priyankesh Kumar,&nbsp;Devesh Kumar,&nbsp;Ravi Shankar,&nbsp;Prateek Khare","doi":"10.1007/s11814-024-00262-7","DOIUrl":"10.1007/s11814-024-00262-7","url":null,"abstract":"<div><p>The present work deals with the optimization of waste cooking oil biodiesel yield (WCOBD) and its preparation cost with the help of Box–Behnken design (BBD) using response surface methodology (RSM) in design expert software. Initially, TiO₂–ZnO (nanocatalyst) was prepared with the help of the sol–gel method and ratio of TiO₂–ZnO was optimized by single parameter study. The doping of ZnO over TiO₂ surface was studied by FTIR, XRD, SEM, and EDAX analysis. ANOVA suggests the quadratic model is closely fitted for both biodiesel yield and biodiesel cost. The value of adjusted and predicted <i>R</i>² was found to be 0.9309 and 0.8465 for biodiesel yield. While the value of adjusted and predicted <i>R</i>² was found to be 0.9313 and 0.8472 for biodiesel cost. The maximum actual and predicted yield of 88% was obtained at catalyst dose: 2.5 g/l; methanol: 50 ml; waste cooking oil (WCO): 50 ml; time: 120 min, and temperature: 65 °C. The % error between actual and predicted biodiesel varies in the range of −7.90–7.19%. The minimum actual and predicted WCOBD cost was found to be INR 47.29/l and INR 44.68/l with % error in the range of −19.56–13.87% at catalyst dose: 2.5 g/l; methanol: 25 ml; waste cooking oil (WCO): 75 ml; time: 120 min, and temperature: 65 °C, respectively. Overall, the model used to predict the waste cooking oil biodiesel yield, and its cost is closely fitted with the actual result.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 12","pages":"3213 - 3226"},"PeriodicalIF":2.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213073","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":"Colloidal Quantum Dot Solid-Based Infrared Optoelectronics Enabled by Solution-Phase Ligand Exchange","authors":"Min-Jae Si,&nbsp;Dongeon Kim,&nbsp;Seoryeon Jeong,&nbsp;Minjung Yang,&nbsp;Jeongeun Kim,&nbsp;Seo-Young Lee,&nbsp;In-Suh Lee,&nbsp;Jaewoo Jeong,&nbsp;Byeong-Chan Kim,&nbsp;Taeho Han,&nbsp;Beomkwan Kim,&nbsp;Yongnam Ahn,&nbsp;Seungin Jee,&nbsp;Yujin Jung,&nbsp;Se-Woong Baek","doi":"10.1007/s11814-024-00268-1","DOIUrl":"10.1007/s11814-024-00268-1","url":null,"abstract":"<div><p>This study explores the rational strategy to build lead sulfide (PbS)-based colloidal quantum dots (CQDs) solid for high performance photodetection and solar energy conversion in the near- and short-wave infrared spectra. We demonstrated a facile engineering process from CQD synthesis to infrared CQD devices fabrication. By controlling the monomer concentration, we effectively tuned the infrared absorption characteristics and the solution-phase surface ligand exchange resulted in highly concentrated CQD ink, facilitating the formation of uniform, and thick CQD solids, which is crucial for high absorption efficiency. The CQD-based infrared photodetector achieved a specific detectivity of approximately 10¹¹ Jones and fast response times under 100 ns. Furthermore, optimized PbS CQDs were utilized in solar cells and achieved high quantum efficiency across visible to infrared spectrum, indicating a significant potential for 2-terminal tandem structures with perovskite front cells.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3561 - 3572"},"PeriodicalIF":2.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213074","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":"Technical Overview of Pyro-processing and Policy Considerations","authors":"Kwangchae Im,&nbsp;Manseok Lee,&nbsp;Seung Min Woo","doi":"10.1007/s11814-024-00263-6","DOIUrl":"10.1007/s11814-024-00263-6","url":null,"abstract":"<div><p>Pyro-processing is an emerging technology crucial to the implementation of a closed nuclear fuel cycle. It is distinguished by its method of extracting and recycling actinides from fission products in spent nuclear fuels, utilizing high-temperature molten salt media. Despite its promise, the technology poses proliferation concerns that underscores the imperative for robust safeguards. While the safeguarding framework for aqueous reprocessing facilities that has been established over decades offers a foundational reference, the unique challenges posed by Pyro-processing necessitate a tailored approach. Amid these concerns, Pyro-processing is heralded as a viable strategy for nuclear waste management, with research increasingly focusing on its selectivity and efficacy within molten salt systems. This paper scrutinizes the proliferation risks inherent in Pyro-processing, delineates the requisite safeguards, and evaluates the feasibility of Pyro-processing, especially within the purview of the 123 Agreements between the United States and South Korea.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 10","pages":"2881 - 2899"},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11814-024-00263-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213138","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":"Synthesis and Property Control of Bead-Shaped Silica Adsorbents for Rhodamine B Dye Adsorption","authors":"Jiyull Kim, Hyeona Yu, Sang Bin Kim, Na Yeon Kim, Ji Bong Joo","doi":"10.1007/s11814-024-00266-3","DOIUrl":"https://doi.org/10.1007/s11814-024-00266-3","url":null,"abstract":"<p>In this study, we synthesized Bead-Shaped Silica and evaluated its performance in adsorbing the dye Rhodamine B. The Bead-Shaped Silica (BS) was synthesized without the use of harmful substances. The BS Adsorbent was synthesized using silica powder and the eco-friendly biopolymer sodium alginate through the Egg box junction method. It was found that by adjusting the molar ratio of silica to alginate during the manufacturing process, the specific surface area and pore size could be controlled. The BS-2.5 sample exhibited the highest surface area and adsorption capacity due to the effective removal of alginate during heat treatment. The pseudo-first-order adsorption kinetic constants and effective diffusivity of the BS material decreased with decreasing pore size, while the adsorption capacity increased. The adsorption behavior of Rhodamine B was modeled using Langmuir and Freundlich isotherms. Based on calculations using these models, the BS-2.5 sample, which had the largest surface area, showed the best performance. Additionally, in continuous flow system experiments, the use of BS resulted in clean water production, whereas columns with silica powder experienced structural damage and dye leakage due to severe pressure drops.</p>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"10 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142213076","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":"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}