Article
Thermodynamics
Ping Geng, Kaiwei Sun, Peng Fu, Yan Zhang, Weiming Yi
Summary: This study investigates the CO2 gasification of calcium-rich lignite and coffee char through thermogravimetry analysis. The effects of calcium deactivation on activation energy are assessed, and the results show that calcium deactivation increases the activation energy significantly.
THERMOCHIMICA ACTA
(2022)
Article
Energy & Fuels
Yan Cao, Yu Bai, Jiang Du
Summary: By varying the temperature, steam/biomass ratio, and olivine content, this study investigated their impact on the product gas composition, tar content, and H2 yield. The results showed that gas and H2 yields were higher at higher temperatures, with an increase in CO and H2 contents. These findings suggest that steam-gasification with olivine can be a promising option for producing H2-rich syngas with less tar formation and lower CO2 emissions.
JOURNAL OF THE ENERGY INSTITUTE
(2021)
Article
Chemistry, Physical
Hala Braidy, Sylvie Valin, Fabrice Patisson
Summary: The aim of this study is to investigate the behavior of sulfur and chlorine during the pyrolysis of biomasses and waste components with different compositions and ash contents. It was found that sulfur and chlorine are easily released into the gas phase, especially for wool, cardboard, and PVC. For agricultural residues, both organically and inorganically associated sulfur contribute to its release.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Thermodynamics
Hong Du, Xiuyun Ma, Miao Jiang, Peifang Yan, Z. Conrad Zhang
Summary: A new strategy was developed to significantly increase the carbon utilization efficiency of biomass fast pyrolysis by co-upgrading the by-products. The reaction of corncob char with simulated pyrolysis gas showed the feasibility of producing valuable CO and H-2 at suitable temperatures. The high reactivity of raw corncob biochar due to its high potassium content makes co-upgrading for syngas production feasible without further treatment.
Article
Engineering, Environmental
Xiaobin Qi, Qiyao Yang, Weijian Song, Zhiping Zhu, Qinggang Lyu
Summary: The gasification fly ash (GFA), a bulk industrial solid waste from coal gasification process, was effectively disposed by conducting fluidized activation experiments in a bench-scale CFB test rig and steam activation experiments in a vertical tube furnace. The results showed that the pore structure of GFA developed in a matter of seconds and the specific surface area (SBET) increased with temperature, reaching a maximum increase of 48.9% and a value of 204 m2/g. The GFA exhibited an activation potential of 362 m2/g (SBET) through steam activation.
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
Hongchang Xin, Jiawei Wu, Jiaxin Zhang, Sifan Chen, Huaqiang Pang, Juan Lv, Enchen Jiang, Zhifeng Hu
Summary: K is the most abundant trace metal in biomass, which has a dual effect on chemical looping gasification (CLG) by promoting performance and inhibiting oxygen carrier (OC) performance. This study investigates the dual effect of K on CLG performance under different K content, steam, K existence form, and thermo-kinetics analysis. The results show that K can significantly promote CLG performance at low K-addition and accelerate agglomeration at 12% K-addition. The addition of steam can utilize the promotion effect of CH3COOK and inhibit the formation of Fe2SiO4 and agglomeration.
Article
Soil Science
Gregor Meyer, Michael J. Bell, Enzo Lombi, Casey L. Doolette, Gianluca Brunetti, Etelvino H. Novotny, Wantana Klysubun, Yaqi Zhang, Peter M. Kopittke
Summary: The research suggests that soil properties and the form of phosphorus supplied are more important in controlling phosphorus solubility than the co-application of potassium. Optimizing the form of phosphorus is crucial when designing fertilizer placement strategies.
Article
Chemistry, Applied
Yaxin Ge, Saiman Ding, Xiangrui Kong, Efthymios Kantarelis, Klas Engvall, Marcus Ohman, Jan B. C. Pettersson
Summary: Online alkali measurements using surface ionization were conducted to investigate alkali release during heating of industrial fluidized bed materials and gasification of biomass-based char and bed material mixtures. The results indicate that alkali release from the bed materials starts at 820 C and increases with temperature, time, and the presence of CO2. It was also observed that the char absorbs significant amounts of alkali from the used bed material. Furthermore, the migration of other important inorganic elements enhances initial alkali release and char reactivity, but reduces during the final stage of gasification.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Congbiao Chen, Bo Hou, Yan Liu, Litao Jia, Zhongyi Ma, Jungang Wang, Qiang Wang, Debao Li
Summary: Carbon coated cobalt core-shell catalysts with different coating thickness were prepared by acetylene dissociation at different temperatures, and the carbon coating had remarkable cutting effects on Fischer-Tropsch synthesis (FTS) products. By adjusting the hydrogenolysis temperature, different carbon species were retained on the surface of carbon coated catalysts. The optimized catalyst structure reduced the selectivity of C1-C4 and increased CO conversion, resulting in C5-C12, C13-C20, and C5-C20 products with high selectivity. The roles of different carbon species in FTS were elucidated, and the relationships between carbon species and FTS products selectivity were studied in detail.
Article
Energy & Fuels
Vilailuck Siriwongrungson, Janjira Hongrapipat, Matthias Kuba, Reinhard Rauch, Shusheng Pang, Jullapong Thaveesri, Michael Messner, Hermann Hofbauer
Summary: Bed materials and their catalytic activity are key parameters influencing the performance of a dual fluidized bed gasification system. The presence of calcium-rich layers on the bed materials, influenced by the addition of biomass ash, calcium hydroxide, and dolomite, resulted in lower tar concentration and higher hydrogen concentration in the product gas.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Energy & Fuels
Ye Tian, Dong He, Yi Zeng, Lian Hu, Junfeng Du, Zhiyuan Luo, Wensheng Ma, Zhiwei Zhang
Summary: This research investigates the air-gasification process of pine sawdust using a fluidized bed unit with Ni/olivine as a catalyst to destroy tar. The study explores the effects of reaction conditions and catalyst properties on the composition of the produced gas, the heating value of the syngas, char conversion efficiency, and cold gas efficiency. The findings indicate that higher temperatures favor the production of H2 and CO and decrease CH4 and C2H4. The capture efficiency of tar increases with the equivalence ratio, but gas heating value decreases due to a decline in combustible gas contents.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Article
Energy & Fuels
Zixin Jiao, Li Liu, Yan Zhao, Xiye Chen, Penghua Qiu
Summary: The study evaluated the cogasification reactivity of Shenmu bituminous coal (SM) char and corn straw (CS) char in CO2 and found that increasing the blend ratio of CS and gasification temperature can weaken inhibition and enhance synergy. The addition of CS volatiles, especially potassium (K), can promote the cogasification reaction, with the promotion effect increasing with temperature. The comparison between CS-SM blend char and CS char volatiles-SM char showed different effects on gasification reactivity depending on the presence of alkali and alkaline earth metals.
Article
Engineering, Chemical
Birgitta Narindri Rara Winayu, Jin-De Li, Hsin Chu
Summary: This study investigated the effects of Fe2O3/SiO2 and Fe2O3/Al2O3 oxygen carriers on the reaction with H2, CO, and CH4 in Chemical Looping Combustion (CLC), and examined the interference of H2S. The reduction of oxygen carrier and the formation of Fe2SiO4 were observed during the reaction. The study also analyzed the reaction kinetics and characterization of oxygen carriers. Compared to previous studies focusing on CO, H2, or CH4 in CLC, this study provided a comprehensive research on the interruption of H2S, characterization, and reaction kinetics.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Energy & Fuels
Hairat Abduhani, Yalkunjan Tursun, Mei Zhong, Xueli Huang
Summary: The gas releasing characteristics and kinetics of chemical looping gasification (CLG) of cotton stalk under isothermal conditions were studied. The synergistic effect of CuO and NiO was found to increase the carbon conversion rate. Different OCs had different effects on the gas composition during gasification. The prepared bimetallic OC was found to be more suitable for CLG in terms of conversion effect and activation energy.
Article
Energy & Fuels
Thomas Karl Hannl, Robin Faust, Matthias Kuba, Pavleta Knutsson, Teresa Berdugo Vilches, Martin Seemann, Marcus Ohman
Article
Energy & Fuels
Robin Faust, Thomas Karl Hannl, Teresa Berdugo Vilches, Matthias Kuba, Marcus Ohman, Martin Seemann, Pavleta Knutsson
Article
Energy & Fuels
Sebastien Pissot, Teresa Berdugo Vilches, Jelena Maric, Isabel Canete Vela, Henrik Thunman, Martin Seemann
Article
Engineering, Environmental
Jelena Maric, Teresa Berdugo Vilches, Sebastien Pissot, Isabele Canete Vela, Marianne Gyllenhammar, Martin Seemann
Article
Energy & Fuels
Robin Faust, Teresa Berdugo Vilches, Per Malmberg, Martin Seemann, Pavleta Knutsson
Article
Energy & Fuels
Mariane Vigoureux, Pavleta Knutsson, Fredrik Lind
Article
Energy & Fuels
Robin Faust, Mohammad Sattari, Jelena Maric, Martin Seemann, Pavleta Knutsson
Article
Energy & Fuels
Angelica Gyllen, Pavleta Knutsson, Fredrik Lind, Henrik Thunman
Article
Energy & Fuels
Sebastien Pissot, Robin Faust, Panida Aonsamang, Teresa Berdugo Vilches, Jelena Maric, Henrik Thunman, Pavleta Knutsson, Martin Seemann
Summary: This study investigates the interaction between bed materials and fuel ash in dual fluidized bed gasification, revealing that bed materials develop oxygen transport capacity while also exhibiting catalytic activity. Sulfur is proposed as one of the components contributing to this process.
Article
Energy & Fuels
Robin Faust, Panida Aonsamang, Jelena Maric, Alyona Tormachen, Martin Seemann, Pavleta Knutsson
Summary: Thermal conversion of automotive shredder residue (ASR) using indirect fluidized bed gasification was conducted, with a focus on the interactions between the bed material and the ASR ash. Iron deposition onto olivine particles was observed, potentially increasing their oxygen-carrying ability. A significant portion of the particles in the bed originated from the ASR ash, containing Fe, Si, Zn, Ti, Cu, with some particles exhibiting a hollow morphology suggesting a melt state during formation.
Article
Energy & Fuels
Mariane Vigoureux, Tomas Leffler, Pavleta Knutsson, Fredrik Lind
Summary: The research investigates the interactions between sulfur and ilmenite as bed material, focusing on the roles of ash layers in capturing and releasing added sulfur under different combustion conditions. The study found that sulfur is primarily captured by bed materials with developed ash layers under oxidative conditions and released under reducing conditions. The main formed phases found to participate in sulfur uptake and release are mixed-sulfate-phase K2Ca2(SO4)3, K2SO4, and CaSO4.
Article
Green & Sustainable Science & Technology
Henrik Thunman, Teresa Berdugo Vilches, Martin Seemann, Jelena Maric, Isabel Canete Vela, Sebastien Pissot, Huong N. T. Nguyen
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2019)
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.