Article
Engineering, Chemical
Daye Yang, Quanling Zhang, Qingjun Zhang, Chengtian Cui
Summary: Pressure-swing distillation (PSD) is an effective technique for separating pressure-sensitive azeotropes. By employing heat pump assisted distillation (HPAD) and self-heat recuperation technology (SHRT), PSD can be electrically driven and exhibit significant economic advantages. However, the integration of electrical components may introduce dynamic control challenges.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Cong Duan, Chunli Li
Summary: The characteristics of the mixture of ethyl acetate and ethanol were analyzed, and a three-column extractive distillation process was proposed to separate the system efficiently. Various factors affecting the process were studied, and energy-saving processes were introduced to improve the separation efficiency. Furthermore, innovative methods were proposed to optimize the processes, leading to significant reductions in total annual cost, energy consumption, and CO2 emissions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Ao Yang, Zong Yang Kong, Jaka Sunarso, Weifeng Shen
Summary: In this study, a systematic approach of heat-integration and vapor recompression heat pump-assisted triple-column pressure-swing distillation (TCPSD) was developed for the recovery and separation of ternary mixture of organic solvents. The feasibility of TCPSD was evaluated using thermodynamics topological analysis, and the optimal separation sequence was determined. The application of HI and VRHP technologies resulted in significant improvement in terms of energy consumption, economic feasibility, environmental impact, and energy efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ran An, Shengxin Chen, Hao Li, Xinxin Li, Ying Jin, Chunhu Li, Weizhong An, Ruixia Liu
Summary: The study proposes an improved reactive pressure-swing distillation (R-PSD) process for the separation of methanol-dimethyl carbonate azeotropes and compares it with the conventional heat-integrated PSD process. The results show that the R-PSD process outperforms the conventional method in terms of energy, economics, and environmental factors, indicating significant energy-saving potential.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Xiaoxin Gao, Zhi Wang, Qiuran Cheng, Yi Yang, Kairui Lu
Summary: With the increasing industrialization, there is a growing emphasis on energy-saving and environment-friendly separation technologies. In this study, a pressure-swing distillation (PSD) process is established to effectively separate methylcyclohexane (MCH) and tert-butanol (TBA) azeotropes. Two improved separation processes, heat pump pressure swing distillation (HP-PSD) and heat integrated pressure swing distillation (HIPSD), are designed to reduce energy consumption. The results show that both processes significantly decrease energy consumption and improve the economy, with HP-PSD process being the most economical and environment-friendly.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
Abrar Inayat
Summary: More than half of global energy consumption is wasted as heat. Recovering waste heat can improve efficiency, reduce fuel consumption, and lower CO2 emissions. The iron and steel industry, being a major energy consumer, should focus on increasing energy efficiency. This article analyzes strategies for waste heat recovery in the iron and steel manufacturing sector, showing its potential for heating, cooling, and electricity generation.
Article
Engineering, Chemical
Zixuan Liu, Lin Hao, Xiaoyi Han, Zhengrong Cao, Hongyuan Wei
Summary: In this article, two-feed preheating strategies and heat pump vapor recompression are used to improve the thermodynamic efficiency and economic performance of extractive distillation. The case study of methanol and acetone separation process shows that two-feed preheating strategies are more efficient and have less waste heat fraction removed by the condenser than one-feed preheating strategies. The application of vapor recompression further enhances the energy-saving and thermodynamic efficiency of the two-feed method. The optimal vapor ratio of 0.7 in two-feed preheating strategies leads to significant improvements in thermodynamic efficiency (52.46%) and energy savings (35.15%) compared to the original extractive distillation process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Wenting Duan, Minbo Yang, Xiao Feng
Summary: This paper presents an insightful analysis of heat integration of distillation into the overall process considering the change of operating pressure. Rules to identify the best operating pressure that minimize the overall energy consumption are proposed. The result indicates that the hot utility of the overall process can be reduced by 758 kW when the column pressure is lowered by 260 kPa.
Article
Engineering, Chemical
Jinfeng Liu, Shu Wang, Peng Gao, Shanshan Liu, Yixin Ma, Dongmei Xu, Lianzheng Zhang, Jun Gao, Zhishan Zhang, Yinglong Wang
Summary: This study proposes a process that combines reactive distillation with extractive distillation using mixed entrainers to further reduce the production cost and energy consumption of sec-butyl alcohol. By introducing thermal coupling distillation technology and using a mixed solvent ratio of EG:DMSO=9:1, the thermodynamic efficiency of the process is increased by 18.02%, the total annual cost is saved by 15.18%, and CO2 emissions are reduced by 391.82 kg/h compared to the single DMSO entrainers process.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Environmental
Qingqing Rui, Qing Ye, Jinlong Li, Yao Wang, Azhi Yu
Summary: Energy-saving extractive distillation method is proposed for separating ethanol and 1,4-dioxane from industrial effluent. Ethylene glycol (EG) is chosen as entrainer in direct extractive distillation, and dimethyl sulfoxide (DMSO) is used in the indirect extractive distillation (IED) process. Heat integration and heat pump technologies are employed to reduce energy consumption. The IED-DMSO process combined with heat integration achieves the best performance, with significant reductions in total annual cost, energy consumption, CO2 emissions, and entropy generation compared to the IED-EG process.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Biotechnology & Applied Microbiology
Isnaeni Nurjanah, Lin -Han Chiang Hsieh, Yi-Hsien Chiang, Wu -Yang Sean
Summary: NMP is a widely used solvent in various industries. Recycling and reusing NMP waste can help reduce production costs.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Thermodynamics
Yan Li, Yixiao Ding, Manman Cao
Summary: This paper proposes a distillation system of absorption heat pumps based on intermediate heat exchange through waste heat recovery and cascade energy consumption to significantly improve energy efficiency. The results show that the system can reduce steam consumption, save softened water, and achieve economic benefits.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Zong Yang Kong, Juan Gabriel Segovia-Hernandez, Hao-Yeh Lee, Jaka Sunarso
Summary: This study investigates the application of energy-intensified techniques in extractive distillation and highlights the lack of analysis methods for complex distillation systems. Through three case studies, it is found that the intensified configurations do not provide energy-saving compared to conventional extractive distillation, mainly due to poor interconnecting flowrate or composition and high column internal vapour flowrate. The study also suggests the potential extension of existing methods for evaluating energy-saving efficiency in complex distillation and provides recommendations based on simulation results and analysis of existing publications.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Review
Energy & Fuels
Olga Arsenyeva, Leonid Tovazhnyanskyy, Petro Kapustenko, Jiri Jaromir Klemes, Petar Sabev Varbanov
Summary: A plate heat exchanger (PHE) is a modern and efficient heat transfer equipment, capable of enhancing heat recuperation and energy efficiency. This paper reviews the construction and exploration developments of PHEs, as well as the methods of heat transfer intensification. The use of inclined corrugations on the surface of PHE plates is a common method to improve performance.
Article
Engineering, Chemical
Xinhao Li, Qing Ye, Jinlong Li, Yingjie Liu, Lingqiang Yan, Xue Jian, Jianyu Zhang
Summary: This paper proposes a heterogeneous pressure-swing azeotropic distillation (HADPSD) process for the separation of cyclohexane/tert-butanol from industrial effluent. The optimal operating parameters are obtained through the simulated annealing algorithm. Heat pump and heat integration strategies are introduced to save energy. The evaluation indicators show that the heat pump assisted HADPSD process with auxiliary reboilers and heat integration is the optimal energy-saving process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Engineering, Chemical
Chihiro Fushimi, Kentaro Yato, Mikio Sakai, Takashi Kawano, Teruyuki Kita
Summary: This review summarizes the recent progress in experimental and CFD studies on gas-solid cyclones, explaining the modified pressure drop model, scale-up methodology, and criteria for a single large cyclone vs. multiple cyclones. Future research perspectives are also discussed.
KONA POWDER AND PARTICLE JOURNAL
(2021)
Review
Energy & Fuels
Chihiro Fushimi
Summary: By effectively utilizing the advantages and disadvantages of biomass power generation systems, especially by integrating renewable energy and energy storage systems, it is possible to greatly reduce CO2 emissions while balancing electricity supply and demand.
Article
Engineering, Environmental
Takayuki Uchino, Chihiro Fushimi
Summary: A simplified dynamic model for a Ca(OH)(2)/CaO-containing fluidized bed reactor was developed, with assessment of its performance using nitrogen or steam as the fluidizing gas. The study showed that thermochemical heat storage can improve efficiency by absorbing fluctuations from variable renewable energy.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Takayuki Uchino, Takahito Yasui, Chihiro Fushimi
Summary: The study proposes a biomass power plant integrated with thermochemical heat storage, using biomass combustion for power generation with an organic Rankine cycle, and storing electricity from the grid via dehydration reaction during charging time. Results showed that energy storage efficiency could be increased by improving heat recovery, with inlet gas flow rate having the largest influence on energy efficiencies. Flexibility in turbine output and discharging time could be achieved by adjusting operational parameters.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Chemical
Ryu Ukawa-Sato, Guoqing Guan, Chihiro Fushimi
Summary: The research focused on improving energy efficiency and economics of levulinic acid production by minimizing waste materials, recovering catalysts, and utilizing humins. Purification of levulinic acid and formic acid was achieved through the use of furfural and extracting agents.
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
(2021)
Article
Computer Science, Interdisciplinary Applications
Yasuki Kansha, Shoma Kato, Koji Tsuji
Summary: As global oil production increases, the quality of crude oil deteriorates and becomes heavier. It is necessary to develop improved refinery processes. This study evaluated the characteristics of residue desulfurization reactions in crude oil samples using petroleomics and molecular structure data, and identified the effects of molecular structures on desulfurization and denitrification processes.
COMPUTERS & CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Gabriel Talero, Yasuki Kansha
Summary: This study compares the errors of stoichiometric and kinetic models in simulating the gasification process, and identifies the model that best predicts the composition of gasification products. The results show that the kinetic model is more accurate in predicting composition and yields.
Article
Energy & Fuels
Ryo Murakoshi, Chihiro Fushimi
Summary: In this study, the integration of a steam accumulator system with an existing biomass power plant is proposed to increase the flexibility of power generation at a relatively low cost. The results show that the steam discharge profile and the levelized cost of storage are influenced by the initial steam pressure in the accumulator.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Chemical
Shoma Kato, Yuka Sakai, Yuki Sato, Yasuki Kansha
Summary: Advanced oxidation processes are effective for treating wastewater with refractory organic substances. Hybrid reactors using mist generated by ultrasound and photocatalysts can enhance pollutant removal. However, the functions of UV, ultrasound, mist, and photocatalyst in the hybrid reactor are still unclear. This study aims to investigate these functions by comparing pollutant removal performance under different operating conditions. The results show that UV, ultrasound, and photocatalyst are necessary for utilizing mist as a reaction field, and a synergistic effect is observed when these conditions are applied together in the hybrid reactor.
CHEMICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Ryu Ukawa-Sato, Nanami Hirano, Chihiro Fushimi
Summary: This study developed a novel process for producing levulinic acid (LA) from wheat straw using formic acid as catalyst. The process minimized waste generation by utilizing solid residues as heat sources and used furfural as an extractant for purification. The minimum selling prices of LA and furfural were calculated and found to be higher than market price, but the process can be self-sufficient in terms of energy requirements. This study provides an effective strategy for implementing a biorefinery process with minimum waste generation.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Energy & Fuels
Feng Xu, Kei Sakurai, Yuki Sato, Yuka Sakai, Shunsuke Sabu, Hiroaki Kanayama, Daisuke Satou, Yasuki Kansha
Summary: Non-uniform temperature distributions in air-conditioned areas can reduce energy efficiency and cause discomfort. This study developed a soft-sensing model based on thermodynamics and transport phenomena to predict temperature in space. Water experiments were conducted to simulate indoor conditions and measure transient temperatures for model training. The model, developed using multiple linear regression, accurately predicted target temperatures with a mean absolute error within 0.69 K. This soft-sensing model has the potential to be integrated into air-conditioning systems.
Article
Thermodynamics
Jiasi Sun, Yuki Sato, Yuka Sakai, Yasuki Kansha
Summary: In this study, an inverse design method was proposed to reduce the energy requirement of post-combustion CO2 capture. Four physical solvents were modeled and optimized using artificial neural network-simulated annealing models. The optimization results highlighted the importance of absorbent properties for energy savings. A new strategy was proposed for adjusting the physical properties of deep eutectic solvents, and a promising CO2 absorbent was identified through experimental tests and computer modeling.
Article
Energy & Fuels
Takayuki Uchino, Takahito Yasui, Chihiro Fushimi
Summary: This study investigated a biomass power plant integrated with a thermochemical heat storage system. The performance of the system was evaluated by comparing different working fluids, ORC parameters, and biomass fuel combustion. The results showed that the proposed process can effectively absorb the fluctuation of variable renewable energy and has economic potential.
JOURNAL OF ENERGY STORAGE
(2023)
Review
Green & Sustainable Science & Technology
Jiasi Sun, Yuki Sato, Yuka Sakai, Yasuki Kansha
Summary: Ionic liquids (ILs) and deep eutectic solvents (DESs) are considered as potential solvents for carbon capture. The properties of ILs/DESs can vary due to the different combinations of cations and anions, making it challenging to screen suitable ILs/DESs for CO2 capture experimentally. Computer-aided molecular design (CAMD) using machine learning (ML) models provides an efficient and accurate approach to search for appropriate IL structures for carbon capture. This review paper discusses the application of ML models in predicting the properties of ILs/DESs and the carbon capture effectiveness, and proposes future research directions and challenges in screening suitable ILs/DESs.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Changrui Feng, Meng Chen, Yifan Zhou, Zhengkun Xie, Xiumin Li, Pairuzha Xiaokaiti, Yasuki Kansha, Abuliti Abudula, Guoqing Guan
Summary: High-entropy (NiFeCoV)S2 porous nanosheets were fabricated on Ni foam through a hydrothermal reaction process for alkaline water/seawater electrolysis. The rough and porous nanosheets provided large active surface area and exposed more active sites, facilitating mass transfer and improving catalytic performance. The as-fabricated catalyst exhibited low overpotentials and excellent corrosion resistance, showing promise for efficient water/seawater electrolysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
