Review
Agricultural Engineering
Weijin Zhang, Qingyue Chen, Jiefeng Chen, Donghai Xu, Hao Zhan, Haoyi Peng, Jian Pan, Mikhail Vlaskin, Lijian Leng, Hailong Li
Summary: Hydrothermal treatment (HTT) is a promising technology for biomass valorization, and machine learning (ML) has been widely applied to predict and optimize the production from HTT. This review comprehensively analyzed the application of ML for HTT of biomass and summarized ML-aided HTT prediction of yield, compositions, and physicochemical properties of derived products. Future prospects were proposed to enhance predictive performance, mechanistic interpretation, process optimization, data sharing, and model application during ML-aided HTT.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Noah Luciano Taufer, Vittoria Benedetti, Matteo Pecchi, Yukihiko Matsumura, Marco Baratieri
Summary: This study investigated a combined process of hydrothermal carbonization (HTC) and supercritical water gasification (SCWG) to fully utilize digestate from anaerobic digestion. The results showed that increasing SCWG temperature led to higher carbon yield and hydrogen content in the gas phase, while increasing residence time resulted in a decrease in carbon yield in the gas phase. Increasing feedstock concentration led to a higher gas generation rate.
Article
Engineering, Chemical
Ying Gao, Yuang Wang, Yue Jiang, Hui Xu, Xue Liang Li, Hui Ying Yang, Yuan Guo, Jiayu Xu, Shuai Ran, Hong Zhang, Yinong Lyu
Summary: This study investigated the hydrogen production and transformation path of the gasification of domestic sludge with hydrothermal aqueous phase. The presence of organic fractions in hydrothermal aqueous phase was found to greatly enhance the efficiency of sludge gasification for hydrogen production. Aromatics, particularly the dissociation of side chain methyl groups, were found to be critical for the synergistic effect in hydrogen production.
CHEMICAL ENGINEERING SCIENCE
(2024)
Review
Chemistry, Organic
M. V. Kulikova, A. Yu. Krylova, K. O. Krysanova, A. B. Kulikov, A. L. Maximov
Summary: Torrefaction and hydrothermal carbonization are low-temperature thermochemical procedures that convert biomass into biocoal, which is a carbon-neutral alternative to fossil coal. Biocoals have hydrophobic properties, increased energy density, and similar calorific value to brown coals compared to untreated biomass. The formation mechanisms of biocoal differ between the two processes due to the presence of a large amount of water in hydrothermal carbonization. This review focuses on papers discussing specific features of low-temperature heat treatment of biomass and the conversion trends of biomass structural components (cellulose, hemicellulose, lignin) during torrefaction and hydrothermal carbonization.
PETROLEUM CHEMISTRY
(2023)
Article
Chemistry, Applied
Yuxin Zhang, Shiliang Wu, Dongxu Cui, Sang-Jun Yoon, Youn-Sang Bae, Bugae Park, Yinlong Wu, Fu Zhou, Cunhua Pan, Rui Xiao
Summary: The study proposes a system that combines bioenergy with carbon capture and storage technology to generate carbon-negative electricity, which is significant for achieving the global goal of carbon neutrality.
FUEL PROCESSING TECHNOLOGY
(2022)
Review
Chemistry, Applied
Farihahusnah Hussin, Nur Nadira Hazani, Munawar Khalil, Mohamed Kheireddine Aroua
Summary: This article provides a systematic review of hydrothermal technology and the life cycle assessment of hydrothermal biomass conversion. The study found that there is limited research on the environmental and economic impacts of hydrothermal biomass conversion, highlighting the need for environmental impact studies to demonstrate the benefits of biomass hydrothermal processing.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Alessandro Antonio Papa, Andrea Di Carlo, Enrico Bocci, Luca Taglieri, Luca Del Zotto, Alberto Gallifuoco
Summary: An innovative process based on hydrothermal carbonization, gasification, and solid oxide fuel cells (SOFCs) technologies was developed using a commercial process simulation software called ASPEN Plus. The study focused on plant efficiency under various operating conditions, and found that gasification of hydrochar obtained at 200°C with S/C ratio of 0.6 yielded the best results.
Article
Chemistry, Multidisciplinary
Andrew Caratenuto, Abdulrahman Aljwirah, Yanpei Tian, Xiaojie Liu, Yinsheng Wan, Yi Zheng
Summary: The study introduced a solar desalination device made of fallen leaves and guar, showcasing its efficient performance in producing drinkable water under various environmental conditions.
Article
Chemistry, Physical
Vera Marcantonio, Marcello De Falco, Mauro Capocelli, Alvaro Amado-Fierro, Teresa A. Centeno, Enrico Bocci
Summary: Concerns about energy security, energy prices, and climate change have led to scientific research on renewable energy sources and carbon capture technologies. This paper investigates the coexistence of biomass gasification, carbon capture, and conversion technologies for hydrogen production from biomass waste. The proposed model aims to optimize the performance of the plant by varying operating parameters, and the carbon footprint of the plant is lower than the limit set by the European Commission.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Yuping Li, Ying Li, Xinghua Zhang, Chenguang Wang, Xi Li, Longlong Ma
Summary: The study simulated the conceptual light olefin production system from biomass using gasification and methanol synthesis, evaluating its thermodynamic performance through exergy analysis. Results showed that the gasifier and gas composition adjustment unit were the main sources of irreversibility, with the steam & power generation subsystem having a high exergy destruction ratio.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Peng Lv, Ruofei Wu, Jiaofei Wang, Yonghui Bai, Lu Ding, Juntao Wei, Xudong Song, Guangsuo Yu
Summary: Hydrothermal carbonization (HTC) is an important method for energy recovery from carbonaceous waste. This study investigated the pretreatment of cow manure and industrial sludge by HTC at different temperatures. The results showed that HTC treatment can increase carbon content and reduce oxygen content, leading to the production of clean solid fuels with high energy densification. The study also found that the distribution of pyrolysis products of co-hydrochar is similar to that of industrial sludge. The co-hydrochar has good gasification reactivity and exhibits a synergistic effect.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Juntao Wei, Qinghua Guo, Xudong Song, Lu Ding, Alexander Mosqueda, Yurong Liu, Kunio Yoshikawa, Guangsuo Yu
Summary: This study investigated the co-gasification of blended char of bituminous coal and rice straw at different temperatures and found that the interaction between the binary particles influenced the reactivity and kinetics during co-gasification. The synergistic effect was weaker at higher HTC and gasification temperatures, affecting the transformation of mineral matter and the chemical structure evolution. The results suggest that the presence of synergistic effect can enhance blended char reactivity and improve co-gasification kinetics.
APPLIED THERMAL ENGINEERING
(2021)
Review
Environmental Sciences
Zinhle Mkhwanazi, Yusuf Makarfi Isa, Shadana. T. Vallabh
Summary: The increasing amount of wastewater sludge and sugarcane bagasse has become a global concern. The demand for alternative energy sources in South Africa due to the depletion of fossil fuel reserves further highlights the importance of utilizing renewable resources such as biomass. The production of biocoal from wastewater sludge and bagasse through hydrothermal carbonization is explored in this article as a solution for sustainable bioenergy supply and reducing CO2 emissions.
Article
Green & Sustainable Science & Technology
Ruikun Wang, Senyang Liu, Qiao Xue, Kai Lin, Qianqian Yin, Zhenghui Zhao
Summary: In this study, model biomass samples prepared from five representative components were carbonized hydrothermally under a typical condition of 220 degrees C, and mathematical models were developed to predict the properties of the hydrochar. The results showed synergistic effects between different components and high accuracy of the prediction models.
Review
Engineering, Environmental
Oraleou Sangue Djandja, Lin-Xin Yin, Zhi-Cong Wang, Pei-Gao Duan
Summary: This article systematically reviews recent findings on hydrothermal treatments of Municipal Sewage Sludge, highlighting the related chemical reactions and the impact of reaction parameters. Suggestions are made for optimizing the applications of end products, and potential challenges for future hydrothermal treatments are discussed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(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.