Article
Agricultural Engineering
Xudong Yang, Zhongyang Luo, Bichen Yan, Yinchen Wang, Chunjiang Yu
Summary: This study investigated the migration and transformation of nitrogen during biomass torrefaction combined with coal co-combustion. The XPS analysis showed that torrefaction in CO2 suppressed the conversion of nitrogen components. Additionally, torrefaction in a N2/O2 atmosphere at a lower temperature improved biomass properties and reduced NO emissions during co-combustion.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Xing-yu Yang, Guo-chang Song, Zhong-wei Li, Qiang Song
Summary: The blending combustion of biomass and coal significantly enhances the release of lead (Pb). Potassium compounds in biomass, such as potassium chloride (KCl) and potassium carbonate (K2CO3), play a significant promoting role in Pb release. The promoting effect of potassium weakened as the temperature increased, and K2CO3 exhibited a stronger promoting effect compared to KCl.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Chemistry, Applied
Juntao Wei, Miao Wang, Deliang Xu, Lei Shi, Bin Li, Yonghui Bai, Guangsuo Yu, Weina Bao, Jie Xu, Hong Zhang, Shu Zhang
Summary: This paper provides a detailed summary of the main detection methods for the migration and transformation of alkali/alkaline earth metal species (AAEMs) during biomass and coal co-gasification. It systematically reviews the influencing factors and proposes pathways for the migration and transformation of AAEMs. Furthermore, it discusses the relationship between AAEMs migration and transformation and the synergy of co-gasification.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Thermodynamics
Lang Liu, Shan Ren, Jian Yang, Donghai Jiang, Junjiang Guo, Yubao Pu, Xianpiao Meng
Summary: The co-combustion of biomass and coal gangue can reduce SO2 emissions and decrease ash fouling/slagging tendency. Research findings suggest that at a CG blending ratio <40%, K mainly forms K2SO4 and KAlSi3O8, while at a CG blending ratio >40%, it mainly forms KAlSi3O8.
Article
Chemistry, Applied
Thomas Allguren, Klas Andersson, Andrew Fry, Eric G. Eddings
Summary: This study investigated the combustion behavior of biomass with different pre-treatments and studied the formation of NOx in co-firing experiments. The results showed that the amount of fuel-bound nitrogen in coal is higher than that in biomass fuels, resulting in higher NO formation. Further analysis revealed that the distribution of volatile nitrogen species varied in the biomass co-firing cases, which was suggested as the main reason for the observed difference in NO formation.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Jingkun Han, Dunxi Yu, Jianqun Wu, Xin Yu, Fangqi Liu, Minghou Xu
Summary: Torrefaction has different effects on the ash slagging behavior during biomass and coal co-combustion. Co-firing biomass with high-Ca coal reduces the ash slagging rate, while co-firing biomass with high-Si/Al coal exacerbates the slagging tendency. Torrefaction can reduce the ash slagging rate of sawdust but increase it for other fuels. Measures such as optimizing operation conditions, co-firing with high-Ca coals, and using additives are suggested to alleviate the ash slagging during torrefied herbaceous biomass combustion.
Article
Energy & Fuels
Jingkun Han, Dunxi Yu, Jianqun Wu, Xin Yu, Fangqi Liu, Minghou Xu
Summary: Torrefaction technology has positive effects on ash fouling during biomass combustion and co-combustion. The interactions between fuels during co-combustion inhibit the formation of inside fouling deposits while the incorporation of alkalis in aluminosilicates promotes the growth of outside deposits. Torrefaction reduces the formation of chlorides and sulfates, thus inhibiting the inside deposition. However, the elemental repartitioning during torrefaction leads to more retention of alkalis, which aggravates the formation of mixed aluminosilicates and favors the outside deposition.
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
Green & Sustainable Science & Technology
Fariha Kanwal, Ashfaq Ahmed, Farrukh Jamil, Sikander Rafiq, H. M. Uzair Ayub, Moinuddin Ghauri, M. Shahzad Khurram, Shahid Munir, Abrar Inayat, Muhammad S. Abu Bakar, Surendar Moogi, Su Shiung Lam, Young-Kwon Park
Summary: The study revealed that the combustion of a blend containing 60% coal and 40% sunflower residue was the most efficient, resulting in less emission of NOx, SOx, and CO2 compared to pure coal combustion. The results suggest great potential for using selected biomass residues in blend with coal for environmentally friendly and sustainable energy production.
Article
Energy & Fuels
Kai Yan, Chang Wen, Tianyu Liu, Jingjing Ma, Rui Li, Jianqun Wu, Zhenqi Jing
Summary: The study found that torrefaction and washing can reduce the content of low-melting-point aluminosilicates in biomass after co-combustion, which is beneficial in alleviating ash slagging issues.
JOURNAL OF THE ENERGY INSTITUTE
(2021)
Article
Thermodynamics
Peitao Zhao, Chuanjin Lin, Yilong Li, Jing Zhang, Neng Huang, Xin Cui, Fang Liu, Qingjie Guo
Summary: This study investigated the effect of co-hydrothermal carbonization of PVC and alkali coal on combustion and slagging characteristics of generated fuels. The results showed that co-HTC can improve combustion performance of the fuel, with higher ignition temperature and average combustion rate.
Article
Thermodynamics
Haobo Bi, Zhanshi Ni, Junjian Tian, Chengxin Wang, Chunlong Jiang, Wenliang Zhou, Lin Bao, Hao Sun, Qizhao Lin
Summary: This paper studies the effects of biomass on the combustion characteristics, combustion products, and combustion reaction model of coal gangue. A multi-component combustion reaction model for coal gangue and biomass is established based on thermogravimetric experimental data. The addition of biomass is found to promote the combustion reaction of coal gangue and the production of gas products. Different combustion reaction models provide better explanations for different combustion processes.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Ruidan Gao, Shangyi Yin, Tao Song, Ping Lu
Summary: A 3D Eulerian-Lagrangian model using the MP-PIC method is developed to study the co-combustion of pulverized coal and biomass in a TTF precalciner. The findings show the formation of three spraying effects and five recirculation zones near the raw meal inlet in the precalciner. The highest temperature in the main combustion zone can reach 1600 K, and the decomposition rate of raw meal can reach 93.9% without biomass input. Furthermore, as the biomass blending ratio increases, the average temperature, decomposition rate of raw meal, and NOx emissions in the precalciner decrease.
Article
Energy & Fuels
Zi-Meng He, Yu-Jie Deng, Jing-Pei Cao, Xiao-Yan Zhao
Summary: Co-gasification of biomass and coal has advantages in mitigating ash-related problems induced by potassium in biomass. However, the effect varies depending on the occurrence mode of inorganic K in biomass. The study found that K2CO3 and K2SO4 are mainly retained as KAlSiO4 and K2SO4 in the gasification ash. Co-gasification with coal can help mitigate bed agglomeration caused by K2CO3, K2SO4, and KCl in biomass.
Article
Energy & Fuels
Shusen Wang, Chun Zou, Chun Lou, Haiping Yang, Yang Pu, Jianghui Luo, Chao Peng, Cong Wang, Zhicong Li
Summary: This study investigates the co-combustion behaviors and synergistic effects between coal and lignocellulosic biomass, and coal and hemicellulose/cellulose/lignin under high heating rate conditions. The results show that there are synergistic effects during the devolatilization process, promoting homogeneous ignition and char ignition.
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)