Article
Energy & Fuels
Yuanbo Zhang, Yutao Zhang, Xueqiang Shi, Yaqing Li, Xiaodi Zhang
Summary: The co-spontaneous combustion process of coal and gangue is dominated by promotion, and the danger of spontaneous combustion is higher when both coexist.
Article
Chemistry, Applied
Jingchong Yan, Yasen Wu, Li Zhang, Shunjin Huang, Zhiping Lei, Zhanku Li, Weidong Zhang, Shibiao Ren, Zhicai Wang, Hengfu Shui
Summary: This study evaluates the influence of co-firing municipal sewage sludge with coal gangue on pollutant emissions. The results show that co-combustion leads to smoother combustion and reduced activation energy. It also improves the retention of heavy metals in the ashes and facilitates in-situ desulfurization and denitration. These findings suggest that co-combustion of multiple wastes is a feasible approach for resource utilization and environmental impact reduction.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Engineering, Environmental
Feiyue Gao, Chuncai Zhou, Jiao Du, Yulin Zhang, Wentao Wu, Guijian Liu, Da Li
Summary: Co-combustion of sewage sludge and coal is an effective way to generate energy and reduce environmental pollution. Oxy-fuel combustion technology improves energy efficiency and CO2 capture in power plants. The thermogravimetric analysis of co-combustion of sewage sludge and anthracite coal in different atmospheres revealed improvements in ignition and burnout performance by adding sewage sludge, as well as changes in properties with varying oxygen concentrations.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Yanlin Wang, Li Jia, Baihe Guo, Biru Wang, Liu Zhang, Xin Zheng, Jun Xiang, Yan Jin
Summary: The co-combustion of sewage sludge and coal slime is a promising technique for reducing waste volume and associated risks. The study investigated the N migration and transformation mechanisms during co-combustion through various techniques. Results showed that NH3 and HCN were the main N-containing gases produced during the combustion process, with their release influenced by the ratio of coal slime. Interactions between the two wastes were observed, promoting NH3 production and inhibiting HCN and NO production.
Article
Green & Sustainable Science & Technology
Shuai Guo, Jialiang Gao, Deng Zhao, Chenchen Zhao, Xingcan Li, Guangyu Li
Summary: This study investigates the effects of co-combustion of sewage sludge and coal on the emissions of NOx and SOx and the formation of ash. The results show that a higher sludge content can reduce SO2 emission and promote fusion of ash particles to alleviate slagging. The specific surface area of ash is negatively correlated with temperature. A reaction temperature of 900 degrees C and sludge content of 20 wt% are found to be optimal for pollutant emission control and ash agglomeration during co-combustion.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Chemistry, Physical
Guangyang Li, Zhuoyuan Chen, Afeng Wu, Tao Shi, Xiong Zhang, Hui Li, Haiping Yang, Jingai Shao, Shihong Zhang, Hanping Chen
Summary: This study investigated the pyrolysis and co-combustion characteristics of semi-dry sewage sludge after dehydration, with a focus on reducing energy consumption and ensuring stability during combustion. The results showed that lower moisture content and higher heating rates resulted in faster release of volatile substances. In the co-combustion of semi-dry sewage sludge and bituminous coal, increasing the mixing ratio of semi-dry sewage sludge led to a decrease in ignition and burnout temperatures. The main gas precipitation area during co-combustion was found to be in the temperature range of 300-700 degrees C, with CO2, NOx, SO2, and VOCs being the main gaseous products.
Article
Energy & Fuels
Mingqiu Wu, Haitao Li, Liang Wang, Shan Feng, Yu Wang, Ning Yang, Kai Wang, Minggao Yu
Summary: This study investigates the combustion characteristics, interaction, combustion reaction model, and kinetic parameters of coal/gangue co-combustion. The results reveal the effects of different mixing ratios on the combustion behavior and establish a predictive model for co-combustion.
Review
Energy & Fuels
Xin Wang, Jun Xu, Peng Ling, Xiaoxue An, Hengda Han, Yifeng Chen, Long Jiang, Yi Wang, Sheng Su, Song Hu, Jun Xiang
Summary: This study investigated the characteristics of sewage sludge and coal slime combustion, finding that co-combustion had a positive effect on desulfurization. Proper blend ratios and temperatures could effectively suppress the emission of SO2. The evolution of S functional groups showed different patterns during co-combustion. Calcium played an important role in the process, reacting with SO2 to form intermediate solid products and retaining SO2 in the ash.
Article
Energy & Fuels
Shuanghui Deng, Houzhang Tan, Bo Wei, Xuebin Wang, Fuxin Yang, Xiaohe Xiong
Summary: This study investigated the combustion characteristics of Zhundong coal, coal gangue, and their blends using thermogravimetric analysis and analytical instruments. The optimal blending ratio for better combustion performance was determined to be 30% coal gangue added into Zhundong coal. The results provide reference for burning blended high ash coal in a large pulverized Zhundong coal boiler for safety and economy.
Article
Environmental Sciences
Hao Liu, Yajun Wang, Juan Chen
Summary: Combustion experiments were conducted to investigate the transformation of Zn and Cr in sewage sludge (SS) blended with low-rank coal. The results showed that the retention rates of Zn and Cr in ash increased with the blending of coal, and the greater the proportion of low-rank coal, the higher the residual rate of heavy metals in the ash.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Lei Deng, Yuxiao Qiu, Jiahao Jiang, Zhengrong Zhu, Defu Che
Summary: This study investigates the co-combustion characteristics of electrolytic aluminum waste and bituminous coal. The results show that both cathode carbon blocks (CCB) and hardened material (HM) can efficiently promote the ignition performance of the blends, but the burnout performance is weakened as the mass proportion of HM increases. Remarkable synergy occurs during the co-combustion process, where the changes in pre-exponential factors play a key role.
Article
Environmental Sciences
Yanlin Wang, Li Jia, Baihe Guo, Xin Shen, Xin Zheng, Jun Xiang, Yan Jin
Summary: This paper investigates the co-combustion characteristics and NO/SO2 emission behavior of sewage sludge (SS) and coal slime (CS). The study reveals significant interactions between SS and CS during co-combustion and explores the mechanisms behind these interactions. The results demonstrate the influence of both non-catalytic factors and catalytic factors on the combustion characteristics, and the effect of co-combustion temperature and CS ratio on NO and SO2 emission characteristics. The findings also shed light on the reduction of NO facilitated by reducing gases released by SS combustion and the reduction of SS-NO by char formed by CS.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Malgorzata Wilk, Maciej Sliz, Boguslaw Lubieniecki
Summary: Hydrothermal co-carbonization of sewage sludge and fuel additives can improve the dewaterability of hydrochar for energy production. The addition of biomass during the process significantly enhances the properties of hydrochar and combustion process.
Article
Energy & Fuels
Shilin Yu, Runze Tao, Houzhang Tan, Ao Zhou, Shuanghui Deng, Xuebin Wang, Qingfu Zhang
Summary: Co-combustion of municipal sewage sludge (MSS) with coal in power plants is a common method for disposal, but it increases the ecological risk due to the high heavy metals content. This study analyzed the properties of fly ash and bottom ash from MSS co-combustion, including ash composition, particle size distribution, heavy metals content, and leaching characteristics. The results showed that the co-combustion had no significant effect on ash composition and heavy metals content order. However, the total content of Cu, Mn, Pb, Zn, and Hg in co-combustion ash was higher than that in coal-fired ash without sludge blending. The leaching concentrations of Cr and Ni exceeded the limit value, indicating a potential ecological risk. The potential ecological risk levels of fly ash and bottom ash were moderate and high, with Cr and Hg as the main contributors.
Article
Energy & Fuels
Tong Xu, Dikun Hong, Chunbo Wang, Yue Zhang, Yonghua Li
Summary: This study investigated the migration behavior and mechanism of nitrogen during the municipal sludge/coal co-pyrolysis using the ReaxFF MD method. The accuracy of this method was verified by comparing the individual pyrolysis properties of sludge and coal with experimental results. It was found that there was a negative synergistic effect on the release of nitrogen during the initial stage of co-pyrolysis, while a positive synergy related to the condensation of nitrogen-containing tar was observed during the secondary reaction stage. The study provides important insights into the behavior of nitrogen during sludge/coal co-pyrolysis.
Article
Thermodynamics
Pengcheng Zhao, Jingang Wang, Liming Sun, Yun Li, Haiting Xia, Wei He
Summary: The production of green hydrogen through water electrolysis is crucial for renewable energy utilization and decarbonization. This research explores the optimal electrode configuration and system design of compactly-assembled industrial electrolyzer. The findings provide valuable insights for industrial application of water electrolysis equipment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
V. Baiju, P. Abhishek, S. Harikrishnan
Summary: Thermally driven adsorption desalination systems (ADS) have gained attention as an eco-friendly solution for water scarcity. However, they face challenges related to low water productivity and scalability. To overcome these challenges, integrating ADS with other desalination technologies can create a small-scale hybrid system. This study proposes integrating ADS with a Thermo Electric Dehumidification (TED) unit to enhance its performance.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
C. X. He, Y. H. Liu, X. Y. Huang, S. B. Wan, Q. Chen, J. Sun, T. S. Zhao
Summary: A decentralized centroid multi-path RC network model is constructed to improve the temperature prediction accuracy compared to traditional RC models. By incorporating multiple heat flow paths and decentralizing thermal capacity, a more accurate prediction is achieved.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chaoying Li, Meng Wang, Nana Li, Di Gu, Chao Yan, Dandan Yuan, Hong Jiang, Baohui Wang, Xirui Wang
Summary: There is an urgent need to shift away from heavy dependence on fossil fuels and embrace renewable energy sources, particularly in the energy-intensive oil refining process. This study presents an innovative concept called the Solar Oil Refinery, which applies solar energy in oil refining. A solar multi-energies-driven hybrid chemical oil refining system that utilizes solar pyrolysis and electrolysis has been developed, significantly improving solar utilization efficiency, cracking rate, and hydrogen yield.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chao Ma, Guanghui Wang, Dingbiao Wang, Xu Peng, Yushen Yang, Xinxin Liu, Chongrui Yang, Jiaheng Chen
Summary: This study proposes a bio-inspired fish-tail wind rotor to improve the wind power efficiency of the traditional Savonius rotor. Through transient simulations and orthogonal experiments, the key factors affecting the performance are identified. A response surface model is constructed to optimize the power coefficient, resulting in an improvement of 9.4% and 6.6% compared to the Savonius rotor.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sina Bahmanziari, Abbas-Ali Zamani
Summary: This paper proposes a new framework for improving electrical energy harvesting from piezoelectric smart tiles through a combination of magnetic plucking, mechanical impact, and mechanical vibration force mechanisms. Experimental results demonstrate a significant increase in energy yield and average energy harvesting time compared to other mechanisms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Nanjiang Dong, Tao Zhang, Rui Wang
Summary: This study establishes a multiobjective mixed-variable configuration optimization model for a comprehensive combined cooling, heating, and power energy system, and proposes an efficient generating operator to optimize this model. The experimental results show that the proposed algorithm performs better than other state-of-the-art algorithms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Ahmed E. Mansy, Eman A. El Desouky, Tarek H. Taha, M. A. Abu-Saied, Hamada El-Gendi, Ranya A. Amer, Zhen-Yu Tian
Summary: This study aims to convert office paper waste into bioethanol through a sustainable pathway. The results show that physiochemical and enzymatic hydrolysis of the waste can yield a high glucose concentration. The optimal conditions were determined using the Box-Behnken design, and a blended membrane was used for ethanol purification.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sven Klute, Marcus Budt, Mathias van Beek, Christian Doetsch
Summary: Heat pumps are crucial for decarbonizing heat supply, and steam generating heat pumps have the potential to decarbonize the industrial sector. This paper presents the current state, technical and economic data, and modeling principles of steam generating heat pumps.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Le Zhang, To-Hung Tsui, Yen Wah Tong, Pruk Aggarangsi, Ronghou Liu
Summary: This study investigates the effectiveness of a current-carrying-coil-based magnetic field in promoting anaerobic digestion of chicken manure. The results show that the applied magnetic field increases methane yield, decreases carbon dioxide production, and reduces the concentration of ammonia nitrogen. Microbial community analysis reveals the enrichment of certain methanogenic genera and enhanced metabolic pathways. Pilot-scale experiments confirm the technical effectiveness of the magnetic field assistance in enhancing anaerobic digestion of chicken manure.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Bo Chen, Ruiqing Ma, Yang Zhou, Rui Ma, Wentao Jiang, Fan Yang
Summary: This paper presents an advanced energy management strategy for fuel cell hybrid electric heavy-duty vehicles, focusing on speed planning and energy allocation. By utilizing predictive co-optimization control, this strategy ensures safe inter-vehicle distance and minimizes energy demand. Simulation results demonstrate the effectiveness of the proposed method in reducing fuel cell degradation cost and overall operation cost.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Fabio Fatigati, Roberto Cipollone
Summary: Organic Rankine Cycle-based microcogeneration systems that use solar sources to generate electricity and hot water can help reduce CO2 emissions in residential energy-intensive sectors. The adoption of a recuperative heat exchanger in these systems improves efficiency, reduces thermal power requirements, and saves on electricity costs.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Lipeng He, Renwen Liu, Xuejin Liu, Xiaotian Zheng, Limin Zhang, Jieqiong Lin
Summary: This research proposes a piezoelectric-electromagnetic hybrid energy harvester (PEHEH) for low-frequency wave motion and self-sensing wave environment monitoring. The PEHEH shows promising power output and the ability to self-power and self-sense the wave environment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Shangling Chu, Yang Liu, Zipeng Xu, Heng Zhang, Haiping Chen, Dan Gao
Summary: This paper studies a distributed energy system integrated with solar and natural gas, analyzes the impact of different parameters on its energy utilization and emissions reduction, and obtains the optimal solution through an optimization algorithm. The results show that compared to traditional separation production systems, this integrated system achieves higher energy utilization and greater reduction in carbon emissions.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Qingpu Li, Yaqi Ding, Guangming Chen, Yongmei Xuan, Neng Gao, Nian Li, Xinyue Hao
Summary: This paper proposes and studies a piston-type thermally-driven pump with a structure similar to a linear compressor, aiming to eliminate the high-quality energy consumption of existing pumps and replace mechanical pumps. The coupling mechanism of working fluid flow and element dimension is analyzed based on force analysis, and experimental data analysis is used to determine the pump operation stroke. Theoretical simulation is conducted to analyze the correlation mechanism of the piston assembly. The research shows that the thermally-driven pump can greatly reduce power consumption and has potential for industrial applications.
ENERGY CONVERSION AND MANAGEMENT
(2024)