Article
Thermodynamics
Huining Zhang, Jianping Dong, Chao Wei, Caifang Cao, Zuotai Zhang
Summary: The integration consideration of end-point reproductions like molten slag waste heat recovery and resourceful disposal plays a significant role in establishing an economical and environmental circular network system for wastes. The review discusses the limitations and priorities of prevailing heat recovery processes, such as physical or chemical methods, and proposes a collaborative approach combining physical and chemical methods for efficient energy recovery. Additionally, a cleaner routine of molten slag-waste plastics system is proposed for triple targets of carbon dioxide storage, energy conservation, and establishing an economical and environmental circular network system in steelmaking plants.
Article
Green & Sustainable Science & Technology
Bo Wang, Yinhe Liu, Yu Guan, Yiwei Feng
Summary: Pyrolysis is regarded as a promising method for sewage sludge treatment and energy extraction. This study investigated the conditions and characteristics of high-ash sewage sludge (HASS) pyrolysis to produce hydrogen-rich combustible gas. The yields and characteristics of pyrolysis gas, tar, and solid product were determined, and the weight-loss behavior and kinetic characteristics were analyzed. The results showed that HASS mainly decomposed at temperatures between 540-901 °C, with a weight loss rate of 2.399%-3.372%& BULL;min(-1). The highest proportion of tar was naphthalene, ranging from 18.88% to 61.15%, and the major components of pyrolysis gas were H2, CO2, CO, and CH4. The most suitable condition for producing hydrogen-rich combustible gas was found to be at a particle size of 0.15-0.18 mm and a temperature of 800°C, with H2 content reaching 51.477% and lower heating value reaching 13.960 MJ & BULL;m(-3).
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Yunfeng Zhu, Bo Li, Yonggang Wei, Shiwei Zhou, Hua Wang
Summary: Co-pyrolysis of waste printed circuit boards (WPCB) and copper slag (CS) to generate high-value products is a promising approach. In this study, catalytic pyrolysis of WPCB with CS to generate H-2-rich gas was proposed and the catalytic influence of CS on WPCB was investigated. The results showed that the catalytic effect of CS was weaker at low temperatures, and metal oxides increased the gas yield.
Article
Thermodynamics
Florian Pruvost, Schalk Cloete, Jan Hendrik Cloete, Chaitanya Dhoke, Abdelghafour Zaabout
Summary: A techno-economic assessment of molten salt pyrolysis process reveals that moderate pressure and limited reactor size can achieve high efficiency and promising economics. In the long-term, turquoise hydrogen can serve as a promising alternative to blue hydrogen in regions with public resistance to CO2 transport and storage. In the medium-term, expensive first-of-a-kind plants can produce carbon that can access smaller high-value markets, ensuring profitable operation even for first movers.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Mingtao Hu, Wenyi Deng, Yaxin Su, Lihua Wang, Guang Chen
Summary: The study found that a steam-CO2 mixed atmosphere is beneficial for increasing the yield and quality of syngas during the gasification of sewage sludge. H2 is mainly produced between 400 to 700 degrees Celsius, with a maximum concentration of 76.2 vol% under a steam/CO2 ratio of 36. Steam promotes the formation of oxygen-containing compounds, while fixed carbon is consumed through the Boudouard reaction and steam reforming reaction.
Article
Energy & Fuels
Fawei Lin, Fa Zheng, Jiantao Li, Bingyan Sun, Lei Che, Beibei Yan, Guanyi Chen
Summary: This study investigated the catalytic effects of steel slag and red mud in the pyrolysis of oily sludge. It was found that red mud had better catalytic performance and oil recovery effect. The study also discovered that metal oxides could enhance gas production, reduce oil production, and improve the quality of oil.
Article
Thermodynamics
Lili Wang, Yuzhu Zhang, Haibin Ke, Yue Long
Summary: The gas quenching dry slag granulation technique is effective in efficient waste heat recovery, with smaller particle diameter and lower fiber mass fraction contributing to higher recovery rates. High temperature experiments showed the significant impact of airflow velocity and molten slag mass flow rate on granulation characteristics.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Oraleou Sangue Djandja, Zhicong Wang, Peigao Duan, Feng Wang, Yuping Xu
Summary: The study aimed to improve properties of waste tire pyrolysis oil by reducing nitrogen and sulfur contents using a combination of tetralin and hydrogen source. Various factors such as catalyst type, temperature, catalyst loading, time, and hydrogen pressure were examined to optimize the upgraded oil with Pt/C showing the highest performance. The upgraded oil had higher heating values and mainly consisted of aromatic compounds, with monocyclic aromatic hydrocarbons accounting for about 40% of the total content.
Article
Thermodynamics
Zongliang Zuo, Yan Feng, Xiaoteng Li, Siyi Luo, Jinshuang Ma, Huiping Sun, Xuejun Bi, Qingbo Yu, Enze Zhou, Jingkui Zhang, Jianxiang Guo, Huan Lin
Summary: The thermo-chemical conversion method successfully transforms sewage sludge into bio-char and other products, with the use of waste heat recovery technology to improve energy efficiency and increase the value of byproducts.
Article
Chemistry, Physical
Yuelin Qin, Ke Zhang, Xinlong Wu, Qingfeng Ling, Jinglan Hu, Xin Li, Hao Liu
Summary: Blast furnace slag and oily sludge are two main by-products in the ironmaking and gas exploration processes. Research has shown that pyrolysis of oily sludge with blast furnace slag can effectively solidify heavy metal elements in the sludge, while maintaining the activity of the slag for further utilization, providing a new approach for resource utilization and environmental treatment.
Article
Chemistry, Physical
Yanting Liu, Tan Chen, Bingli Gao, Ruihong Meng, Ping Zhou, Ganyu Chen, Yuyu Zhan, Wenjing Lu, Hongtao Wang
Summary: The study investigated the influence of pyrolysis temperature on biogas production from sewage sludge using conventional pyrolysis and microwave pyrolysis. Results showed that with increasing temperature, the product yields varied significantly for conventional pyrolysis, while the changes were minimal for microwave pyrolysis. Microwave pyrolysis resulted in more hydrogen atoms converting into tar instead of being released into biogas, indicating the enhancement of hydrogen transfer reactions at higher temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Alexandra Rozhkovskaya, Jay Rajapakse, Graeme J. Millar
Summary: The study successfully utilized waste materials to produce high purity zeolite LTA beads, highlighting the importance of extending research to shaped forms like extrudates or beads for commercial use.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Environmental
Junhao Lin, Shiwei Liu, Zijian Han, Rui Ma, Chongwei Cui, Shichang Sun
Summary: This research optimizes the microwave pyrolysis process to increase hydrogen gas production and reduce carbon emissions. The horizontal microwave continuous pyrolysis equipment improves biogas yield while increasing sludge treatment amount. Controlling sludge moisture content and utilizing high temperatures is effective in increasing hydrogen gas concentration.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Dogukan Tunay, Oznur Yildirim, Bestami Ozkaya, Ahmet Demir
Summary: This study investigated the hydrogen production from organic substances using waste activated sludge from municipal wastewater treatment. The High Rated Activated Sludge (HRAS) process was applied to enhance the organic composition and reduce energy consumption. The results showed that the HRAS process can decrease the energy requirement of wastewater treatment and enable green energy production with lower carbon emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Zongliang Zuo, Tian Jing, Jinmeng Wang, Xinjiang Dong, Yishan Chen, Siyi Luo, Weiwei Zhang
Summary: This study proposes a granulation and waste heat recovery system using the sewage sludge gasification reaction. The addition of metallurgical slag can improve the efficiency of the sludge gasification reaction. The main catalytic components in copper slag and nickel slag were determined to be Fe3O4 and CaO, respectively. After oxidative modification, the catalytic function was enhanced for copper slag, whereas it was weakened for nickel slag.
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.