Article
Chemistry, Multidisciplinary
Hanhao Liang, Jian Wu, Jiancheng Xu, Jiaming Li, Jianglin Wang, Jingbo Cai, Yini Long, Xiao Yu, Zhanhong Yang
Summary: This study investigates the role of a methyl group in an additive on the interfacial stability of aqueous zinc ion batteries. The methyl group helps to establish a hydrophobic electrical double layer on the anode surface, thereby suppressing parasitic reactions and improving zinc deposition.
Article
Chemistry, Physical
Takuya Kurihara, Munehiro Inukai, Motohiro Mizuno
Summary: In this study, the dynamics of CO2 adsorption and diffusion in metal-organic frameworks (MOFs) were investigated using solid-state nuclear magnetic resonance (NMR) spectroscopy. The rotational motion of ligands in the narrow pore windows of MOFs was found to affect the dynamics of adsorbed CO2. The diffusion rate of adsorbed CO2 was significantly slower in the MOFs with smaller pores, and it was influenced by the steric hindrance of the rotating ligands. Additionally, the diffusion of adsorbed CH4 was also affected by the steric hindrance, showing a size-selective effect.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Neil Robinson, Eric F. May, Michael L. Johns
Summary: Solid-fluid interactions are crucial for porous materials in various chemical processes, but the opaque nature of these systems hinders detailed characterization of interfacial phenomena. A low-magnetic-field two-dimensional H-1 nuclear spin relaxation measurement provides insights into adsorbate identity and interfacial dynamics, showcasing distinct relaxation responses correlated with adsorbate acidity. This approach offers a molecular-level perspective on interactions within optically opaque porous media.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Environmental Sciences
Huang Zhang, Peng Wang, Lin Shi, Jianliang Xue, Aiping Liang, Di Zhang
Summary: The study compared the adsorption of ofloxacin on oxidized activated carbon and carbon nanotube, revealing different effects of oxidation on adsorption characteristics. Oxidized activated carbon led to pore blockage, while oxidized carbon nanotube increased accessibility to new adsorption sites.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Danilo H. S. Santos, Joao P. T. S. Santos, Jose L. S. Duarte, Leonardo M. T. M. Oliveira, Josealdo Tonholo, Lucas Meili, Carmem L. P. S. Zanta
Summary: The study found that electrochemical treatment is efficient in restoring the adsorption capacity of activated carbon, particularly under cathodic current conditions. Through cyclic experiments, it was discovered that activated carbon maintains high adsorption capacity after electrochemical regeneration. The analysis indicates that electrochemical regeneration is an economical and environmentally friendly technique suitable for multiple water treatment cycles.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Jingzhao Wang, Chao Ren, Hongtao Wang, Wei Li
Summary: The study demonstrates that phosphate modification can enhance the fluoride adsorption performance of calcite, especially at low concentrations; however, at high concentrations, the predominant defluoridation mechanism is the formation of CaF2 precipitates, with the contribution of newly formed HAP being insignificant.
Article
Chemistry, Physical
Ba Trung Ho, TaeGyeong Lim, Myeong Hee Jeong, Ji Won Suk
Summary: This study demonstrates the fabrication of high-performance flexible supercapacitors using activated graphene embedded in graphene fibers. The rGO/AG fibers exhibit excellent specific areal capacitance and cycling performance in a PVA/LiCl gel electrolyte, showing great potential for developing flexible FSCs.
ACS APPLIED ENERGY MATERIALS
(2021)
Review
Environmental Sciences
Kshaf Azam, Nasir Shezad, Iqrash Shafiq, Parveen Akhter, Farid Akhtar, Farrukh Jamil, Sumeer Shafique, Young -Kwon Park, Murid Hussain
Summary: Polluted water resources, especially those contaminated with industrial effluents' dyes, pose a severe threat to sustainable development. Adsorption, particularly using activated carbon (AC), is a promising method for wastewater treatment. The synthesis, activation, and modification of AC have been the focus of recent research. Various modified-AC synthesis methods have been investigated to enhance its capacity for removing different-natured dyes in wastewater. The surface chemistry, porosity, and enhanced surface area of AC are important characteristics. Understanding the AC modification techniques, factors affecting its properties, and the influence of modifying agents on its morphology and adsorptive properties is crucial for wastewater treatment.
Article
Chemistry, Applied
Fei-Xiang Huang, Hao-Ze Li, Feng-Ming Xie, Xin-Yi Zeng, Yan-Qing Li, Ying-Yuan Hu, Jian-Xin Tang, Xin Zhao
Summary: The development of efficient long-wavelength TADF emitters has faced challenges due to limiting factors in molecular design. Two orange-red TADF emitters, 3DMAC-BP-Br and 3DMAC-BP-CN, were designed and synthesized based on DMAC and BP with electron-withdrawing bromine atom or cyano group. These emitters have high PLQY values and low LEST values, showing superior device performance.
Article
Chemistry, Multidisciplinary
Gaoyuan Hou, Korawit Chitbanyong, Miyuki Takeuchi, Izumi Shibata, Akira Isogai
Summary: This study comprehensively investigated the catalytic oxidation of commercial and dry-lap hardwood and softwood bleached kraft pulps using solid NaOCl.5H(2)O as the primary oxidant, in order to prepare cellulose fibers containing carboxyl groups. The addition of solid NaOCl at pH 10 led to high reaction rates, short oxidation times, and cellulose fibers with high carboxy content and viscosity-average degree of polymerization.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Review
Chemistry, Physical
Malgorzata Olejarczyk, Iwona Rykowska, Wlodzimierz Urbaniak
Summary: Technological and economic development have influenced the amount of post-production waste, especially waste related to mining, metallurgical, and energy industries. The reuse of non-hazardous or hazardous waste materials for construction materials is limited, but special attention should be given to waste containing fluoride. Fluoride is a harmful trace element that increases in water through industrial wastewater discharge, and effective technologies for fluoride removal are crucial.
Article
Thermodynamics
Linsheng Zhang, Bing Xue, Tingting Chen, Guangyao Li
Summary: High-temperature steam is generated directly from hot water using zeolite functionalized with silane in a solid sorption heat pump system. The use of XS accelerates the thermal response during steam generation and reduces the heat demand for regeneration, leading to improved system performance with higher steam productivity, COPh, and SHP compared to zeolite 13X.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Polymer Science
Shaodong Sun, Chenrui Yuan, Zhulu Xie, Wen-Cong Xu, Qijin Zhang, Si Wu
Summary: This study reports the self-assembly properties and photoresponsive behaviors of an azobenzene-containing block copolymer, and demonstrates that under UV irradiation, the copolymer can generate different nanostructures.
Article
Engineering, Environmental
Donata Drapanauskaite, Kristina Buneviciene, Manoj Silva, Alvyra Slepetiene, Jonas Baltrusaitis
Summary: Anthropogenic solid waste can be a reactive substrate to adsorb and immobilize PO43- for enhancing sustainability. In this study, two types of calcium-rich solid waste were evaluated for their ability to adsorb PO43- from simulated wastewater streams, showing promising results. The release of heavy metals into the simulated wastewater was assessed and only one type of waste exceeded regulated concentrations.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Congyu Zhang, Fanghua Li, Shih-Hsin Ho, Wei-Hsin Chen, Duleeka Sandamali Gunarathne, Pau Loke Show
Summary: This study evaluates the effect of potassium carbonate activation on solid biofuel production from microalgae through oxidative torrefaction. The research reveals that potassium carbonate can improve the physical and chemical properties of torrefied microalgae, leading to increased energy value and graphitization degree of solid biofuel.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Fengjing Jiang, Weineng Liao, Tsubasa Ayukawa, Seong-Ho Yoon, Koji Nakabayashi, Jin Miyawaki
Summary: Surface treatment with cactus-like carbon nanofibers significantly enhances the conductivity of composite bipolar plates, making them promising candidates for vanadium redox flow batteries with excellent durability and high energy efficiency.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Takumi Watanabe, Tomonori Ohba
Summary: The study demonstrates the potential of catalytic thermal reduction of CO2 using nanoscale perovskite-type titanium nanocatalysts at 700 K to produce high-value carbon products with high reaction yields. Reducing the particle size of the catalysts exponentially increased the reactivity of CO2, leading to the formation of graphitic carbons and a nanodiamond-like structure under mild conditions. This approach offers a promising and novel pathway for CO2 reduction and nanodiamond production at low temperatures.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Hyeonseok Yi, Koji Nakabayashi, Seong-Ho Yoon, Jin Miyawaki
Summary: Activated carbon is produced by physical or chemical activation methods. While physical activation methods are commonly used in industry due to lower production costs, they are less effective compared to chemical activation methods in terms of pore development. A novel pressurized physical activation method is proposed to increase activating agent diffusibility and pore development, resulting in activated carbon with higher specific surface area and unique pore size distribution.
Article
Chemistry, Multidisciplinary
Keiko Ideta, Doo-Won Kim, Taegon Kim, Koji Nakabayashi, Jin Miyawaki, Joo-Il Park, Seong-Ho Yoon
Summary: The study investigated the effect of pore size on the response characteristic of an electric double layer capacitor (EDLC), and found that samples with the largest pore size showed superior capacitance and response frequency characteristics. The presence of micropores and mesopores in the activated carbon facilitated low electrolyte-diffusion resistance during the formation of the electric double layer, leading to fast and stable response frequency.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Hyeonseok Yi, Koji Nakabayashi, Seong-Ho Yoon, Jin Miyawaki
Summary: Activated carbon is a suitable adsorbent for ethanol refrigerant adsorption heat pumps (AHPs). Chemically activated carbon with highly developed pore structures has good ethanol adsorption, but it is expensive. Physical activation produces inexpensive activated carbon but with limited pore development. A pressurized physical activation method was developed to produce activated carbon with well-developed pore structure, and it showed comparable or higher ethanol uptake than chemically activated carbon on a weight and volume basis.
Article
Chemistry, Physical
Hiroki Shimanoe, Takashi Mashio, Hideki Nakashima, Seunghyun Ko, Young-Pyo Jeon, Koji Nakabayashi, Jin Miyawaki, Seong-Ho Yoon
Summary: This study closely examined the correlation between the anisotropic texture and (002) molecular stacking property of spinnable mesophase pitch (SMP). It was found that SMP is a specific solution consisting of mesogenic and solvent components, with the mesogenic component composed of a cluster unit of (002) stacked molecular sheets. The anisotropic texture of SMP is strongly correlated with the height of (002) molecular stacking.
Article
Chemistry, Multidisciplinary
Yuta Fujita, Kotona Kohaku, Nao Komiyama, Kazuya Ujiie, Hyuma Masu, Takashi Kojima, Hiroki Wadati, Hirofumi Kanoh, Keiki Kishikawa, Michinari Kohri
Summary: We have successfully created a colorless metal-organic framework (MOF) particle composed of the lanthanide element holmium. This particle exhibits excellent magnetic properties and allows for selective adsorption of dyes through magnetic separation. Furthermore, similar methods can be employed to develop colorless multifunctional MOF particles using other lanthanide elements.
Article
Chemistry, Physical
Kai Haraguchi, Sogo Iwakami, Tomonori Ohba
Summary: In this study, fullerene-pillared porous graphene was prepared and its water vapor adsorption properties were investigated both experimentally and through simulations. The results showed that fullerene-pillared porous graphene with a 25±8% fullerene filling ratio had the highest adsorption capacity and uniform nanopores.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Electrochemistry
Shunsuke Hasumi, Sogo Iwakami, Yuto Sasaki, Sharifa Faraezi, Md Sharif Khan, Tomonori Ohba
Summary: Carbon materials like graphite and activated carbon are widely used as electrodes in batteries and electric double-layer capacitors. Graphene, a thin sheet-like material, is considered a fundamental carbon material, but it has been less studied as an electrode material compared to graphite and activated carbons due to its novelty and difficulty in handling. However, the use of graphene electrodes can enhance the performance of nanodevices. This study evaluated the performance of electric double-layer capacitors based on single-layer and bilayer graphene electrodes in different aqueous electrolyte solutions and investigated the charging mechanism using molecular dynamics simulations.
Article
Materials Science, Paper & Wood
Minjeong Jang, Dongcheon Choi, Younghyun Kim, Hyun-Sig Kil, Sung-Kon Kim, Seong Mu Jo, Sungho Lee, Sung-Soo Kim
Summary: Carbonized fibers with quantifiable mechanical properties were prepared from environmentally benign lyocell fibers through sulfuric acid-catalyzed continuous thermostabilization and following carbonization. The impregnation of lyocell fibers with sulfuric acid increased the mass yield and density of the resulting carbonized fibers, resulting in improved tensile strength and modulus.
Article
Chemistry, Multidisciplinary
Tian Xia, Takeharu Yoshii, Keita Nomura, Keigo Wakabayashi, Zheng-Ze Pan, Takafumi Ishii, Hideki Tanaka, Takashi Mashio, Jin Miyawaki, Toshiya Otomo, Kazutaka Ikeda, Yohei Sato, Masami Terauchi, Takashi Kyotani, Hirotomo Nishihara
Summary: The optimal conditions for facilitating graphene-zipping reactions whilst minimizing graphene stacking processes in highly mesoporous templated carbons were examined. Graphene-zipping reactions occur at temperatures between 1173 and 1873 K, leading to a 1100 fold increase in average graphene-domain size. At temperatures above 2073 K, the carbon framework loses its porosity due to the development of graphene-stacking structures.
Article
Chemistry, Physical
Yuta Fujimoto, Tomonori Ohba
Summary: Catalysts for methane decomposition are crucial for the development of natural gas applications. This study focused on the use of nanocatalysts on various substrates to achieve efficient methane decomposition and aromatization. The results showed that nanocatalysts on mesoporous SiO2 exhibited high activity and low reaction temperature for hydrogen and benzene production.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Takumi Watanabe, Tomonori Ohba
Summary: Carbon utilization techniques for mitigating global warming are crucial in environmental science. This study demonstrates CO2 thermal reduction using nanocatalysts at temperatures below 1000K and evaluates the CO2 sorption and reduction mechanisms within the temperature range of 300-1000K. The optimal condition for CO2 reduction was found to be in the temperature range of 500-800K.
Article
Chemistry, Physical
Hiroki Takamatsu, Md Sharif Khan, Takuya Araki, Chiharu Urita, Koki Urita, Tomonori Ohba
Summary: This study investigates the ion dynamics mechanism in electrical double layer capacitors (EDLCs) through molecular dynamics simulations and experimental approaches. The research demonstrates that capacitance increases with decreasing pore width, reaching a maximum at a 2 nm pore due to the complex pore structure of activated carbons. Additionally, the presence of idle ions through ion pair formation is proposed as the cause for decreased capacitance. The study also observes fast relaxation time of capacitance and slow ion diffusion in wide pores, indicating fast charge-discharge with slow ion dynamics.
SUSTAINABLE ENERGY & FUELS
(2022)
Meeting Abstract
Chemistry, Physical
Daiki Hoshi, Takumi Watanabe, Tomonori Ohba
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)
