Article
Chemistry, Physical
Lubna Naheed, Miriam Koppel, Maarja Paalo, Khadija Alsabawi, Krystina E. Lamb, Evan MacA. Gray, Alar Janes, Colin J. Webb
Summary: The properties of the adsorbed hydrogen phase in three carbide derived carbons have been studied, and it was found that all three CDCs had the same maximum adsorbate density, with the adsorption proportional to the total pore volume.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Y. E. Divo-Matos, R. C. Cruz-Rodriguez, L. Reguera, E. Reguera
Summary: This contribution presents a new model for gas adsorption isotherm at high pressures, derived from the Redlich-Kwong's equation of state, which considers the adsorption space as a fitting parameter unlike the frequently used Zhou model. The proposed model is validated through comparison with hydrogen adsorption isotherms in various porous solids, and the effects of model parameters on the isotherm shape are discussed in detail. This model has potential applications for evaluating adsorption data for gases above their critical temperature, particularly for hydrogen adsorption in porous solids.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Yongha Park, Jun-Ho Kang, Dong-Kyu Moon, Young Suk Jo, Chang-Ha Lee
Summary: This study investigated parallel and series pressure swing adsorption (PSA) processes for H-2 recovery from lean hydrogen mixtures, achieving > 99% H-2 purity. The parallel two-bed PSA process showed H-2 purity of 94.6-98.3% and recovery of 33.5-63.2%, while the series PSA processes achieved over > 99% purity and recovery of 62.478% and 82.643% due to additional pressure equalization steps and blowdown gas utilization. The parallel four-bed PSA process had the highest H-2 productivity, while the series four-bed PSA process achieved > 99% purity with a lower productivity.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Yi Luo, Wenhua Fu, Bin Wang, Zhiqing Yuan, Junliang Sun, Xiaodong Zou, Weimin Yang
Summary: A novel porous germanosilicate SCM-25 with large accessible cavities via widepore windows has been synthesized. It has a high surface area and thermal stability. The study also proposes a potential postsynthetic strategy for the preparation of zeolites with ordered meso-cavities.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Zheng Sun, Bingxiang Huang, Suran Wang, Keliu Wu, Haoze Li, Yonghui Wu
Summary: This research investigates the storage of hydrogen into nanopores using adsorption property, and explores its advantages over traditional high-pressure injection method. The proposed model shows excellent agreements with experimental and simulation data, confirming its reliability. Results indicate that nanopores can store more hydrogen molecules than the traditional high-pressure injection method, and modifying nanopore surface chemistry can significantly improve the adsorption capacity of nanoconfined hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Zijun Deng, Arun Gopalan, Lev Sarkisov
Summary: In this article, a multiscale computational framework is used to design zeolites with competitive performance in post-combustion carbon capture. The properties of the LTA zeolite were modified to produce a wide range of isotherms for carbon capture. Molecular simulations showed that the engineered zeolites could meet the standard requirements for CO2 purity and recovery. The performance of these zeolites can be further improved by modifying the cation composition.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Mehdi Rahmani, Babak Mokhtarani, Nejat Rahmanian
Summary: In this study, the adsorption properties of ultra-stable Y (USY) zeolite were measured, and it was found that it has a high adsorption capacity for hydrogen sulfide and can be completely regenerated. The isosteric adsorption heat of hydrogen sulfide on the adsorbent is 18.1 kJ/mol, indicating physical adsorption, and non-regenerability is the main challenge when using surface adsorbents.
Article
Chemistry, Applied
Fei Li, Yuqi Wang, Xiong Gao, Yujun Wang
Summary: In this study, mesoporous gamma-Al2O3 nanorods with high pore volume and narrow pore size distribution were successfully synthesized via a gibbsite-AACH precursor route in a membrane dispersion microreactor. The effects of reaction temperature, (NH4)2CO3 concentration, and calcination temperature on the samples were investigated. Under optimal conditions, the as-prepared nanorods exhibited high pore volume and narrow pore size distribution. Furthermore, the adsorption performance of the nanorods for Congo red solution was evaluated, showing promising potential in adsorption and other applications.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Soochan Lee, Dongsik Nam, David ChangMo Yang, Wonyoung Choe
Summary: This study efficiently identifies synthesizable candidate topologies for zeolitic imidazolate frameworks (ZIFs) from a zeolite database containing over 2,000,000 hypothetical structures, using structural descriptors extracted from known ZIFs. Intuition-based structural descriptors, such as ring patterns, node numbers, and T-O-T bridging angles, are used as data filters to eliminate infeasible topologies for ZIF formation. The carefully chosen structural descriptors facilitate the prediction of plausible ZIF topologies. Hydrogen adsorption screening is performed to investigate potential applications as porous ZIFs, leading to the suggestion of notable target ZIFs. The collection of new plausible ZIFs, derived from the combined descriptors, will serve as a structural blueprint for synthetic chemists.
Article
Materials Science, Multidisciplinary
Meifeng Li, Hao Zhang, Yimin Zeng, Jing Liu
Summary: This study established the thermodynamics of hydrogen at various temperatures and pressures, investigated the adsorption and dissociation mechanisms of high-pressure hydrogen on iron and iron oxide surfaces, and found that supercritical hydrogen was more active in dissociating on the surfaces, making steels more susceptible to hydrogen embrittlement.
Article
Energy & Fuels
Zhenyang Wang, Yuanping Cheng, Gang Wang, Guanhua Ni, Liang Wang
Summary: This study utilized low pressure argon adsorption and low pressure nitrogen adsorption to analyze the pore parameters of coal with different metamorphism. The results showed that LP-ArGA has advantages in pore analysis and can accurately characterize the pore characteristics of coal.
Article
Materials Science, Multidisciplinary
Rojan Firuznia, Amir Abutalib, Alireza Hakimian, Sina Nazifi, Zixu Huang, T. Randall Lee, Jeffrey D. Rimer, Hadi Ghasemi
Summary: Hydrogen plays a crucial role in sustainable energy, but high-capacity, safe, and cost-effective hydrogen storage has been a challenge. Researchers have developed a modified zeolite material with tuned pores and modified surface chemistry, enabling high storage capacity, fast charging/discharging, and ambient temperature discharging. This material offers a promising solution for hydrogen storage.
MATERIALS TODAY PHYSICS
(2023)
Article
Green & Sustainable Science & Technology
Viktor Kalman, Johannes Voigt, Christian Jordan, Michael Harasek
Summary: This study investigates the feasibility of hydrogen storage in a depleted gas field and the purification of recovered hydrogen using pressure swing adsorption, achieving high purity hydrogen recovery. Challenges are identified in cycle design with varying feed parameters, but adequate separation performance is demonstrated, supporting the applicability of pressure swing adsorption in seasonal storage.
Article
Biotechnology & Applied Microbiology
Chengxian Liu, Cheng Zhao, Xiaomei Hu, Yun Zou, Junge Yun, Xueying Jiang, Ninghan Wei, Zhangfa Tong, Zhihang Chen
Summary: The study focused on providing simple and efficient synthetic routes for meso-microporous ZSM-5. The newly prepared ZSM-5 molecular sieve showed controllable mesoporous channels, which were superior to traditional ZSM-5. Compared to traditional ZSM-5, the toluene adsorption performance of meso-microporous ZSM-5 was effectively improved.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Engineering, Environmental
Nam Sun Kim, Muhammad Numan, Sung Chan Nam, Sang-Eon Park, Changbum Jo
Summary: The breakthrough time of MFI zeolite could be significantly improved by reducing the crystal thickness to a single-unit-cell dimension, resulting in easy access of p-xylene to micropores. Open mesopores did not slow down the mass transfer of p-xylene into zeolite adsorbents, while constricted mesopores did. Mesopore opening is crucial for the desorption behavior of p-xylene, with facilitated diffusion through mesoporous channels allowing for desorption at lower temperatures.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
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.