Article
Agricultural Engineering
Jianjun Hu, Zhentao Jia, Shuheng Zhao, Wei Wang, Quanguo Zhang, Ronghou Liu, Zhen Huang
Summary: In this study, Fe-Ni/AC catalyst was prepared and used for catalytic gasification of various biomass feedstocks. It was found that Fe-Ni/AC had an impact on the H2/CO ratio of syngas and exhibited different catalytic effects on different biomass feedstocks.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Daniele Antolini, Stefano Piazzi, Lorenzo Menin, Marco Baratieri, Francesco Patuzzi
Summary: This study investigates the performance of a reformer reactor for upgrading syngas and char derived from a pilot-scale air gasifier, showing that higher hydrogen concentration and gas quality index can be achieved at higher temperatures and steam flow rates.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Jingchun Huang, Chao Feng, Yun Yu, Di Xie, Zhenqi Wang, Wei Hu, Yu Qiao
Summary: Steam gasification of leftover rice involves pyrolysis, volatile reforming, and char gasification stages. Experiments conducted at temperatures ranging from 600 to 1000 degrees C show that raw leftover rice can be cracked into volatile products at 600 degrees C, generating high yields of tar and gas. The study also demonstrates that torrefied leftover rice generates lower gas yields at all pyrolysis temperatures. This research provides valuable data for designing suitable gasification reactors for food waste.
Review
Chemistry, Multidisciplinary
Rui Moreira, Fernando Bimbela, Noemi Gil-Lalaguna, Jose Luis Sanchez, Antonio Portugal
Summary: This review discusses the current status and future prospects of char gasification technologies, highlighting the lack of extensive research in this area compared to lignocellulosic biomass gasification. It focuses on studies conducted in industrially relevant reactors and the opportunities presented by process intensification through microwave heating.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Thermodynamics
Zhibin Liu, Chuankai Zhao, Longhao Cai, Xinman Long
Summary: A multi-stage model for H-2 rich syngas production from biomass gasification was developed in this study. The results showed that under specific conditions, high H-2 content and carbon conversion efficiency can be achieved.
Article
Environmental Sciences
Yan Cao, Yu Bai, Jiang Du
Summary: Biomass was studied as a potential renewable energy source, and a model was developed to predict gasification characteristics and performances. The study found that gasification temperature significantly influenced gas composition and product yields, while equivalence ratio and steam/biomass ratio affected gasification characteristics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Energy & Fuels
Paul T. Williams, Yukun Li, Mohamad A. Nahil
Summary: Single plastics and mixed waste plastics were processed using pyrolysis-catalytic steam reforming with a carbonaceous char catalyst from waste tires. The gas yield was high, with total gas yields from single plastics ranging from 36.84% to 39.08%. The product gas was mainly composed of syngas (80 vol %) and the hydrogen yield increased with the temperature of the char catalyst.
Article
Chemistry, Applied
Joao Brito, F. Pinto, Alexandre Ferreira, M. A. Soria, Luis M. Madeira
Summary: Biomass gasification produces syngas containing various components such as hydrogen, carbon monoxide, carbon dioxide, methane, water, and higher hydrocarbons like ethane. A study on the steam reforming process of five different streams, obtained from three biomass sources, was conducted using Aspen Plus V12 software and Gibbs energy minimization method. Various operating conditions were assessed, and it was found that temperature, pressure, and steam-to-carbon ratio significantly influenced the hydrogen content in the streams. The hydrogen purity and yield were highest for the stream obtained from the gasification of Lignin followed by conditioning, while coke formation could be mitigated by specific conditions.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Thermodynamics
Yukai Li, Shaozeng Sun, Dongdong Feng, Wenda Zhang, Yijun Zhao, Yukun Qin
Summary: Syngas tempering technology is a method to consume excess O2 in flue gas and increase the reactivity of reburning coal to reduce NO emissions. Experimental results showed that syngas tempering increased the specific surface area and pore volume of char, while decreasing the content of oxygen-containing groups and increasing the content of alkyl groups. CH4 exhibited a better tempering effect than H2, while the effect of CO was not significant. The study provides insights for improving the removal efficiency of existing pulverized coal reburning for NOx emissions reduction.
Article
Agricultural Engineering
G. Grasa, I. Martinez, R. Murillo
Summary: Gasification kinetics of six chars from residual origin were studied under relatively low temperature, low CO2, and high H2O partial pressures. The Random Pore Model (RPM) showed the best fit to experimental results, but the selection of the reaction model depended on the ash composition, specifically the presence of alkali and alkaline earth metals. Chars with ash content higher than 30% wt. were modeled with the RPM model, while chars with the highest K/Si ratio required modified versions of the RPM to accurately predict reaction rates. Textural properties played a key role in determining reaction parameters, such as the pre-exponential factor and activation energy, for chars with similar ash content and composition.
BIOMASS & BIOENERGY
(2024)
Article
Energy & Fuels
Maria Cortazar, Jon Alvarez, Gartzen Lopez, Maider Amutio, Maite Artetxe, Javier Bilbao, Martin Olazar
Summary: The combination of delocalized units for biomass pyrolysis and centralized units for bio-oil gasification is an economically attractive option for full-scale syngas production. The study focuses on validating a bio-oil feeding device and assessing the effect of gasification temperature on gas properties and conversion efficiency. The results show that increasing temperature promotes tar reduction, carbon conversion efficiency, and gas yield.
Article
Energy & Fuels
Yuting Wu, Yunji Pang, Yisheng Chen, Maosen Zhai, Mingjie Zheng
Summary: The addition of additives to biomass can affect the gasification reaction rate of biomass char particles; CaO can accelerate the reaction rate while Fe2O3 can delay it. Additionally, a combination of different catalysts can reduce the total activation energy and promote the steam gasification reaction of char.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Thermodynamics
Wen Tang, Jing-Pei Cao, Zhi-Hao Wang, Zi-Meng He, Tian-Long Liu, Ze-Ying Wang, Fei-Long Yang, Jie Ren, Xiao-Yan Zhao, Xiao-Bo Feng, Hong-Cun Bai
Summary: The study demonstrates that using acid-washed and oxidized Shengli lignite char as a carbon precursor to load cobalt nano-catalyst shows higher activity and stability in low temperature steam reforming of biomass tar, with relatively high H-2 production and low E-a value.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Chemical
Houssame Boujjat, Sylvain Rodat, Stephane Abanades
Summary: The economic feasibility of large-scale solar gasification for centralized H-2 production was evaluated, with solar hybrid and solar-only gasification showing higher competitiveness than the conventional process. A sensitivity study indicated that cost reduction could enable the three processes to reach a competitive range.
Article
Thermodynamics
J. Barco-Burgos, J. Carles-Bruno, U. Eicker, A. L. Saldana-Robles, V. Alcantar-Camarena
Summary: This study investigates the steam gasification of palm kernel shells for hydrogen-rich N2-free syngas production in a pilot-scale atmospheric downdraft allothermal gasifier. Results show that maximum H2 generation and cold gas efficiency can be achieved under specific conditions.
ENERGY CONVERSION AND MANAGEMENT
(2021)
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.