Article
Thermodynamics
M. U. Alzueta, L. Ara, V. D. Mercader, M. Delogu, R. Bilbao
Summary: This study analyzes the interaction between ammonia and NO under combustion conditions from both experimental and kinetic modeling perspectives. The results show that NH3 reduction of NO is more pronounced under oxygen excess conditions, with optimal NO conversion rates reaching nearly 100% in the interaction between NH3 and NO.
COMBUSTION AND FLAME
(2022)
Article
Engineering, Chemical
Xun Tao, Fan Zhou, Xinlei Yu, Songling Guo, Yunfei Gao, Lu Ding, Guangsuo Yu, Zhenghua Dai, Fuchen Wang
Summary: The effect of CO2 presence on oxy-fuel combustion of H2S, especially the formation of COS, was studied. Experimental and simulation results showed that the presence of CO2 reduced the peak flame temperature and triggered the formation of COS. This study revealed the mechanisms of COS formation in oxy-fuel combustion of H2S with CO2 presence.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Rhushikesh Ghotkar, Ryan J. Milcarek
Summary: “This paper combines theoretical and empirical models to study the polarization losses of flame-assisted fuel cells (FFCs). The study finds that at low fuel concentrations, the current density is limited by mass transfer, while at high concentrations, it is limited by activation. The values of parameters alpha and delta are found to vary with fuel concentration.”
Article
Thermodynamics
Xinlu Han, Marco Lubrano Lavadera, Christian Brackmann, Zhihua Wang, Yong He, Alexander A. Konnov
Summary: The formation of nitric oxide (NO) in methane (CH4) flames has been extensively studied, but discrepancies between simulations using different kinetic mechanisms and experimental results persist. Experimental data was collected for NO formation in post-flame zones of CH4+O2+N2 flames with varying oxygen ratios. Analysis showed that thermal-NO production plays a key role in the increase of NO mole fraction in stoichiometric and fuel-lean flames as oxygen ratio increases.
COMBUSTION AND FLAME
(2021)
Article
Engineering, Chemical
Guoqing Lian, Wenqi Zhong
Summary: The CFD-DEM coupled with heat transfer and chemical reaction sub-models was used to simulate oxy-char combustion in a fluidized bed. The study investigated the thermal conversion characteristics of char, including reaction rate, combustion temperature, and heat transfer. Results showed that convection heat and radiation heat were the main contributors, while conduction heat played an insignificant role.
Article
Energy & Fuels
Jicang Si, Guochang Wang, Ziyun Shu, Xiangtao Liu, Mengwei Wu, Rong Zhu, Jianchun Mi
Summary: This study investigates the effects of different diluents and oxygen concentrations on MILD oxy-combustion, finding that CO2 and H2O dilutions are more beneficial for flameless combustion, while N2 is superior for stable combustion at low oxygen levels. N2 dilution leads to high NOx emissions, while CO2 and H2O dilutions result in lower emissions and more uniform heat transfer characteristics. Additionally, the criteria for flameless MILD combustion proposed by Cavaliere and de Joannon and Wiinning and Wiinning are found to apply under CO2 and H2O dilutions but not under N2 dilution for high oxygen concentrations.
Article
Thermodynamics
Mengting Song, Yu Zhuang, Lei Zhang, Chao Wang, Jian Du, Shengqiang Shen
Summary: In this study, the main source of exergy destructions in a SOFC system was found to be the Stack component, and the Heat exchanger component was identified as having the greatest potential for improvement. The results highlight that in the optimization of the system, priority should be given to the Stack component.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Yixiao Han, Yanfen Liao, Xiaoqian Ma, Xing Guo, Changxin Li, Xinyu Liu
Summary: A novel oxy-fuel/solar/wind/battery power generation system is proposed and developed, which utilizes solar and wind energy to power an oxy-fuel combined cycle. This system effectively addresses the intermittency and variability issues associated with renewable energy, and achieves high energy utilization efficiency, low power generation costs, and low CO2 emissions.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Ling-Nan Wu, Zhen-Yu Tian, Kai-Ru Jin, Zhi-Hao Zheng, Du Wang, Bing-Zhi Liu, Qiang Xu, Zhan-Dong Wang
Summary: This study provides a detailed analysis of the oxidation process of pyridine under fuel-lean conditions through experiments and model predictions. A new pyridine LTO 2.0 model is proposed and successfully predicts the experimental data of pyridine and its major oxidation products. The results are of significant importance for understanding the nitrogen evolution mechanism of pyridine in real coal combustion processes.
COMBUSTION AND FLAME
(2022)
Article
Thermodynamics
Jizhen Zhu, Jing Li, Sixu Wang, Mohsin Raza, Yong Qian, Yuan Feng, Liang Yu, Yebing Mao, Xingcai Lu
Summary: The study explores the ignition delay time measurements of methane/diesel mixtures with varying diesel substitution ratios, showing typical two-stage autoignition characteristics and a crossover of IDTs at high temperature. Diesel has a non-linear promoting effect on IDTs, while competition between methane and diesel for OH radicals inhibits the consumption of diesel and promotes the depletion of methane.
COMBUSTION AND FLAME
(2021)
Article
Engineering, Environmental
Anders S. Nielsen, Brant A. Peppley, Odne S. Burheim
Summary: Fuel-assisted solid oxide electrolysis cells have the potential to generate power and valuable chemicals by supplying fuels to the cell's anode. A new mass and heat transport model has been developed to track the reaction pathways and enhance the performance of these cells. This study provides insights for designers to optimize the efficiency and product selectivity of fuel-assisted solid oxide electrolysis cells.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Paulina Wienchol, Agnieszka Korus, Andrzej Szlek, Mario Ditaranto
Summary: This study analyzed the thermal degradation of municipal solid waste under different atmospheric conditions and determined the kinetic data. Results showed that gasification reactions with carbon dioxide occurred during combustion under CO2 atmosphere. The presence of oxygen accelerated the thermal decomposition process. These findings are important for the design of waste oxy-combustion chambers.
Article
Energy & Fuels
Runzhao Li, Jose Martin Herreros, Athanasios Tsolakis, Wenzhao Yang
Summary: A detailed chemical kinetic mechanism for the oxidation of diethoxymethane (DEM) has been developed and validated, showing a good agreement between experimental and computed results. DEM is found to be more reactive at low temperatures compared to n-heptane, without exhibiting negative temperature coefficient behavior. Due to inadequate temperature increases and active radical accumulation, DEM may not be an efficient chemical ignition source as compared to n-heptane.
Article
Energy & Fuels
P. Debiagi, C. Ontyd, S. Pielsticker, M. Schiemann, T. Faravelli, R. Kneer, C. Hasse, V. Scherer
Summary: This work investigates pyrolysis and char oxidation of a high-volatile Colombian bituminous coal, developing a kinetic model based on experimental data. The model accounts for devolatilization and heterogeneous char reactions, accurately simulating experimental results and highlighting the features and limitations of the model.
Article
Green & Sustainable Science & Technology
Jiqing Yan, Mengxiang Fang, Tong Lv, Yao Zhu, Jianmeng Cen, Yiming Yu, Zhixiang Xia, Zhongyang Luo
Summary: This paper investigates the effects of reaction conditions on the combustion characteristics of Xinjiang Bostan coal in pressurized oxy-fuel combustion. The results show that increasing system pressure enhances the combustion process, but this effect weakens when the pressure exceeds a certain value. The reaction mechanism of pressurized oxy-fuel combustion varies as the reaction progresses, with pressure having less influence on the mechanism compared to oxygen concentration.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Chemistry, Physical
Qingqiang Ran, Xuepeng Wang, Peng Ling, Peiwen Yan, Jun Xu, Long Jiang, Yi Wang, Sheng Su, Song Hu, Jun Xiang
Summary: A novel thermal-assisted electrochemical strategy is reported for preparing bimodal emissive carbon dots (B-CDs) from low-cost carbon sources, including graphite and raw coal. The as-prepared B-CDs exhibit bimodal photoluminescence (PL) emission at 415 and 510 nm under single-wavelength excitation. The origin of the bimodal emissive characteristics of the B-CDs was investigated, and a ratiometric PL nanoprobe was developed for pH sensing.
Article
Engineering, Chemical
Mengxia Qing, Yutian Long, Yidong Luo, Ziying Luo, Wenhao Li, Hong Tian, Yanshan Yin, Jinqiao He, Liang Liu, Jun Xiang
Summary: Effective slagging is crucial for FW gasification, and this study focuses on the regulation of temperature and wheat straw to improve ash fusion characteristics. The addition of wheat straw can effectively decrease the ash fusion temperatures and enhance the slagging process.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Thermodynamics
Yi-Feng Chen, Sheng Su, Ya-Wei Song, Tao Liu, Zhong-Hui Wang, Tao Shu, Meng-Xia Qing, Yi Wang, Song Hu, Zhong-Xiao Zhang, Jun Xiang
Summary: The study uses density functional theory to investigate the interaction mechanism between NO and char(N) with different functional forms of nitrogen, finding that char(N-5) plays a key role in reducing NO emissions. The electron donation capability of char(N-5) is higher than other forms of char(N), making it an important contributor in reducing NOx emissions.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Yanlin Wang, Li Jia, Liu Zhang, Xin Zheng, Jun Xiang, Yan Jin
Summary: The co-combustion of sewage sludge and coal slime is a promising method for the harmless disposal of these two solid wastes. The minerals in sewage sludge have significant effects on the combustion of coal slime during co-combustion. Both single and composite minerals have influences on the combustion of coal slime, and the composite minerals can synergistically catalyze the combustion. The kinetic results show that the minerals decrease the apparent activation energy of coal slime during fixed carbon combustion.
Article
Energy & Fuels
Yawei Song, Yifeng Chen, Sheng Su, Hao Tang, Hengda Han, Jun Xu, Long Jiang, Mengxia Qing, Yi Wang, Song Hu, Jun Xiang
Summary: The combustion characteristics of acid-washed and inorganic sodium impregnated coals were studied under different heating rates, and it was found that inorganic sodium inhibits coal combustion in the early stage, but promotes it in the later stage.
Article
Thermodynamics
Baihe Guo, Jingchao Zhang, Yanlin Wang, Xiaolei Qiao, Jun Xiang, Yan Jin
Summary: The use of fly ash to prepare aerogel support for CO2 adsorption was studied. The results showed that the aerogel support made from fly ash had good microscopic properties and achieved high adsorption capacity under certain conditions.
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
Abdulmajid Abdullahi Shagali, Song Hu, Hanjian Li, Huanying Chi, Haoran Qing, Jun Xu, Long Jiang, Yi Wang, Sheng Su, Jun Xiang
Summary: The heating rate has a significant impact on the pyrolysis process, especially for reactions involving the co-pyrolysis of biomass and plastic. The synergistic effects of the blend samples are concentrated in the main decomposition region, and the co-pyrolysis process requires less activation energy compared to the pyrolysis of plastic alone.
Article
Thermodynamics
Jing Zhou, Meng Zhu, Lei Chen, Qiangqiang Ren, Sheng Su, Song Hu, Yi Wang, Jun Xiang
Summary: This study aims to construct the performance analysis and system optimization methods of supercritical CO2 (S-CO2) coal-fired CHP plants with MEA-based post-combustion carbon capture and storage (CCS) that has adapted for various S-CO2 CHP cycles. Results show that exergy efficiency of S-CO2 DPR coal-fired CHP units at 0% and 100% heating loads (HL) are 43.22% and 46.21%, increasing by 9.81% and 1.01% compared with S-CO2 recompression CHP units, respectively.
Review
Chemistry, Physical
Ben Wang, Rajender Gupta, Lei Bei, Qianmin Wan, Lushi Sun
Summary: This review provides an overview of research progress related to syngas quality, tar formation, and minerals transformation. It also describes the current technology under construction and commercial applications, as well as the challenges and prospects for commercial operation. The study highlights the importance of temperature, gasification agents, and steam to MSW ratio in syngas production, and discusses the different forms of tar in various atmospheres. The review also emphasizes the need for efficient catalysts, proper management of heavy metals, and the reduction of investment and operational costs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Kuan Du, Beichen Yu, Yimin Xiong, Long Jiang, Jun Xu, Yi Wang, Sheng Su, Song Hu, Jun Xiang
Summary: Bio-oil emulsions were stabilized using solid emulsifiers such as coconut shell coke, modified amphiphilic graphene oxide, and hydrophobic nano-fumed silica. The stability of the emulsions was influenced by the particles used. The emulsion stabilized by Ni/SiO2 showed potential for catalytic hydrodeoxygenation of bio-oil, inhibiting the polymerization reaction and promoting the conversion of phenolic compounds.
Article
Engineering, Chemical
Jialin Zhang, Song Hu, Yong Ding, Rui Huang, Qiangqiang Ren, Sheng Su, Yi Wang, Long Jiang, Jun Xu, Jun Xiang
Summary: In this study, a hydrothermal-carbonization method was utilized to process waste biomass, resulting in the production of high-value carbon aerogels. The banana peel-based carbon aerogel showed the best performance in ethanol cracking, achieving a hydrogen yield of 41.86%. The enhanced ethanol cracking was attributed to the abundant pores in the carbon aerogel, which extended the residence time, and the presence of inorganic components (such as Ca, Mg, and K) on the surface of the aerogel, which promoted bond-breaking and reorganization in ethanol.
Review
Engineering, Chemical
Chong Tao, Limo He, Xuechen Zhou, Hanjian Li, Qiangqiang Ren, Hengda Han, Song Hu, Sheng Su, Yi Wang, Jun Xiang
Summary: This review discusses the characteristics and removal methods of volatile organic compounds (VOCs) in cooking oil fumes. The emission characteristics are influenced by cooking temperatures, cooking oils, and cuisines. Various purification methods, such as physical capture, chemical decomposition, and combination methods, are compared based on VOC removal rate, operability, secondary pollution, application area, and cost. The catalytic combustion method, particularly with noble metal and non-noble metal catalysts, shows high efficiency, environmental friendliness, and low cost.
Article
Engineering, Environmental
Mengxia Qing, Linlin Zhang, Liang Liu, Yaxin Chen, Yunda Su, Sheng Su, Song Hu, Yi Wang, Jun Xiang
Summary: SiO2 doping improves the de-NOx activity of MnCe/Ti catalysts at high temperatures and enhances their sulfur resistance at wide temperatures.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Siyuan Lei, Zhaohui Du, Yujia Song, Tingting Zhang, Ben Wang, Changsong Zhou, Lushi Sun
Summary: Novel copper-doped zirconium-based MOF (UIO-66) and copper-doped iron-based UIO-66 catalysts were prepared to improve the removal performance of gaseous benzene. The catalysts were characterized using various techniques, and it was found that the bimetal Cu/Fe modification had a positive effect on the morphology of the catalyst particles. The factors of different metal loading, dose of H2O2, and reaction temperature were studied, and it was observed that Cu-1.5/Fe-1.5@UIO-66 achieved the highest benzene removal efficiency of 94.6%. The study also provided insights into the activation mechanism of the catalyst and its potential application in treating benzene pollutants in waste gases.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Shitong Fang, Houfan Du, Tao Yan, Keyu Chen, Zhiyuan Li, Xiaoqing Ma, Zhihui Lai, Shengxi Zhou
Summary: This paper proposes a new type of nonlinear VIV energy harvester (ANVEH) that compensates for the decrease in peak energy output at low wind speeds by introducing an auxiliary structure. Theoretical and experimental results show that ANVEH performs better than traditional nonlinear VIV energy harvesters under various system parameter variations.
Article
Energy & Fuels
Wei Jiang, Shuo Zhang, Teng Wang, Yufei Zhang, Aimin Sha, Jingjing Xiao, Dongdong Yuan
Summary: A standardized method was developed to evaluate the availability of solar energy resources in road areas, which combined the Analytic Hierarchy Process (AHP) and the Geographic Information System (GIS). By analyzing critical factors and using a multi-indicator evaluation method, the method accurately evaluated the utilization of solar energy resources and guided the optimal location selection for road photovoltaic (PV) projects. The results provided guidance for the application of road PV projects and site selection for route corridors worldwide, promoting the integration of transportation and energy.
Article
Energy & Fuels
Chang Liu, Jacob A. Wrubel, Elliot Padgett, Guido Bender
Summary: The study investigates the effects of coating defects on the performance of the anode porous transport layer (PTL) in water electrolyzers. The results show that an increasing fraction of uncoated regions on the PTL leads to decreased cell performance, with continuous uncoated regions having a more severe impact compared to multiple thin uncoated strips.
Article
Energy & Fuels
Marcos Tostado-Veliz, Xiaolong Jin, Rohit Bhakar, Francisco Jurado
Summary: In this paper, a coordinated charging price mechanism for clusters of parking lots is proposed. The research shows that enabling vehicle-to-grid characteristics can bring significant economic benefits for users and the cluster coordinator, and vehicle-to-grid impacts noticeably on the risk-averse character of the uncertainty-aware strategies. The developed pricing mechanism can reduce the cost for users, avoiding to directly translate the energy cost to charging points.
Article
Energy & Fuels
Duan Kang
Summary: Building an energy superpower is a key strategy for China and a long-term goal for other countries. This study proposes an evaluation system and index for measuring energy superpower, and finds that China has significantly improved its ranking over the past 21 years, surpassing other countries.
Article
Energy & Fuels
Fucheng Deng, Yifei Wang, Xiaosen Li, Gang Li, Yi Wang, Bin Huang
Summary: This study investigated the synergistic blockage mechanism of sand and hydrate in gravel filling layer and the evolution of permeability in the layer. Experimental models and modified permeability models were established to analyze the effects of sand particles and hydrate formation on permeability. The study provided valuable insights for the safe and efficient exploitation of hydrate reservoirs.
Article
Energy & Fuels
Hao Wang, Xiwen Chen, Natan Vital, Edward Duffy, Abolfazl Razi
Summary: This study proposes a HVAC energy optimization model based on deep reinforcement learning algorithm. It achieves 37% energy savings and ensures thermal comfort for open office buildings. The model has a low complexity, uses a few controllable factors, and has a short training time with good generalizability.
Article
Energy & Fuels
Moyue Cong, Yongzhuo Gao, Weidong Wang, Long He, Xiwang Mao, Yi Long, Wei Dong
Summary: This study introduces a multi-strategy ultra-wideband energy harvesting device that achieves high power output without the need for external power input. By utilizing asymmetry, stagger array, magnetic coupling, and nonlinearity strategies, the device maintains a stable output voltage and high power density output at non-resonant frequencies. Temperature and humidity monitoring are performed using Bluetooth sensors to adaptively assess the device.
Article
Energy & Fuels
Tianshu Dong, Xiudong Duan, Yuanyuan Huang, Danji Huang, Yingdong Luo, Ziyu Liu, Xiaomeng Ai, Jiakun Fang, Chaolong Song
Summary: Electrochemical water splitting is crucial for hydrogen production, and improving the hydrogen separation rate from the electrode is essential for enhancing water electrolyzer performance. However, issues such as air bubble adhesion to the electrode plate hinder the process. Therefore, a methodology to investigate the two-phase flow within the electrolyzer is in high demand. This study proposes using a microfluidic system as a simulator for the electrolyzer and optimizing the two-phase flow by manipulating the micro-structure of the flow.
Article
Energy & Fuels
Shuo Han, Yifan Yuan, Mengjiao He, Ziwen Zhao, Beibei Xu, Diyi Chen, Jakub Jurasz
Summary: Giving full play to the flexibility of hydropower and integrating more variable renewable energy is of great significance for accelerating the transformation of China's power energy system. This study proposes a novel day-ahead scheduling model that considers the flexibility limited by irregular vibration zones (VZs) and the probability of flexibility shortage in a hydropower-variable renewable energy hybrid generation system. The model is applied to a real hydropower station and effectively improves the flexibility supply capacity of hydropower, especially during heavy load demand in flood season.
Article
Energy & Fuels
Zhen Wang, Kangqi Fan, Shizhong Zhao, Shuxin Wu, Xuan Zhang, Kangjia Zhai, Zhiqi Li, Hua He
Summary: This study developed a high-performance rotary energy harvester (AI-REH) inspired by archery, which efficiently accumulates and releases ultralow-frequency vibration energy. By utilizing a magnetic coupling strategy and an accumulator spring, the AI-REH achieves significantly accelerated rotor speeds and enhanced electric outputs.
Article
Energy & Fuels
Yi Yang, Qianyi Xing, Kang Wang, Caihong Li, Jianzhou Wang, Xiaojia Huang
Summary: In this study, a novel hybrid Quantile Regression (QR) model is proposed for Probabilistic Load Forecasting (PLF). The model integrates causal dilated convolution, residual connection, and Bidirectional Long Short-Term Memory (BiLSTM) for multi-scale feature extraction. In addition, a Combined Probabilistic Load Forecasting System (CPLFS) is proposed to overcome the inherent flaws of relying on a single model. Simulation results show that the hybrid QR outperforms traditional models and CPLFS exceeds the best benchmarks in terms of prediction accuracy and stability.
Article
Energy & Fuels
Wen-Jiang Zou, Young-Bae Kim, Seunghun Jung
Summary: This paper proposes a dynamic prediction model for capacity fade in vanadium redox flow batteries (VRFBs). The model accurately predicts changes in electrolyte volume and capacity fade, enhancing the competitiveness of VRFBs in energy storage applications.
Article
Energy & Fuels
Yuechao Ma, Shengtie Wang, Guangchen Liu, Guizhen Tian, Jianwei Zhang, Ruiming Liu
Summary: This paper focuses on the balance of state of charge (SOC) among multiple battery energy storage units (MBESUs) and bus voltage balance in an islanded bipolar DC microgrid. A SOC automatic balancing strategy is proposed considering the energy flow relationship and utilizing the adaptive virtual resistance algorithm. The simulation results demonstrate the effectiveness of the proposed strategy in achieving SOC balancing and decreasing bus voltage unbalance.
Article
Energy & Fuels
Raad Z. Homod, Basil Sh. Munahi, Hayder Ibrahim Mohammed, Musatafa Abbas Abbood Albadr, Aissa Abderrahmane, Jasim M. Mahdi, Mohamed Bechir Ben Hamida, Bilal Naji Alhasnawi, A. S. Albahri, Hussein Togun, Umar F. Alqsair, Zaher Mundher Yaseen
Summary: In this study, the control problem of the multiple-boiler system (MBS) is formulated as a dynamic Markov decision process and a deep clustering reinforcement learning approach is applied to obtain the optimal control policy. The proposed strategy, based on bang-bang action, shows superior response and achieves more than 32% energy saving compared to conventional fixed parameter controllers under dynamic indoor/outdoor actual conditions.
