Article
Energy & Fuels
Huan Zhou, Guoqiang Wei, Qun Yi, Zheming Zhang, Yingjie Zhao, Yuke Zhang, Zhen Huang, Anqing Zheng, Kun Zhao, Zengli Zhao
Summary: Chemical looping gasification (CLG) of Yunnan lignite with Fe-Mn mixed oxygen carriers (OCs) was conducted to produce high-purity synthesis gas and reduce pollutant emissions. The Fe-Mn composite OCs exhibited oxygen decoupling characteristics and synergistic effects between active components, making them suitable for the gasification process.
Article
Engineering, Environmental
Xueyan Sun, Liangliang Zhu, Wei Zhao, Feng Li, Xi Chen
Summary: In this study, a chemical looping scheme was developed to efficiently reduce impure CO2 containing O-2 impurities into high value-added substances. The synergistic effect of Ni and Fe played a key role in achieving high conversion and yield. This work presents a promising approach for direct utilization of impure CO2 and achieving carbon-neutral economic development.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Jing Yang, Yujie Ren, Jinsuo Lu, Hongpan Liu, Zhiqiang Zhang, Heliang Pang, Keomounlath Bounkhong
Summary: The study investigated a new PG-CuFe2O4 oxygen carrier for reducing lignite in Chemical Looping Gasification (CLG) process, successfully capturing H2S and producing syngas with high proportions of CO and H2. Experimental results showed that PG-CuFe2O4 had excellent H2S capture ability, with Fe3O4, Cu, and FeS playing important roles in the H2S capture during the reduction process.
CHEMICAL ENGINEERING JOURNAL
(2021)
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
Thermodynamics
Wang Du, Liping Ma, Qinghuan Pan, Quxiu Dai, Mi Zhang, Xia Yin, Xiong Xiong, Wei Zhang
Summary: In this paper, a 3D Computational Fluid Dynamics (CFD) full-loop model with multiphase distribution was developed to investigate the fluidization behavior and the CLG performance in Circulating Fluidized Bed (CFB). The study found that particle size, static particle stock, and inlet gas velocity were critical to the stable operation of the CFB. The optimal conditions for this system were determined, and it was found that temperature affected the syngas yield and H2 production significantly.
Article
Green & Sustainable Science & Technology
Fangjun Wang, Wei Zhou, Shiyi Chen, Lunbo Duan, Wenguo Xiang
Summary: This study investigates the performance of the calcium looping process for biomass hydrogen-rich gasification and carbon dioxide capture. It shows that dolomite as bed material has a more significant improvement in hydrogen production compared to quartz sand. Furthermore, a higher temperature in the riser benefits tar conversion, and an increase in solid circulating flux improves hydrogen concentration and yield while reducing tar content.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Paul Dieringer, Falko Marx, Jochen Stroehle, Bernd Epple
Summary: Chemical looping gasification (CLG) is a novel dual-fluidized bed gasification technology that produces high-calorific syngas from solid feedstocks. This study focuses on the hydrodynamic behavior of the CLG reactor system, with special emphasis on the operational principles and solid entrainment from the circulating fluidized bed (CFB) reactors. By analyzing data from a cold flow model and a 1 MWth CLG pilot plant, a comprehensive set of operational rules and an easily-applicable approach for estimating solid entrainment are presented, closing a crucial research gap.
Review
Energy & Fuels
Hengjun Gai, Peiyi Yang, Qiang Zhang, Mengqi Lin, Hongbing Song, Meng Xiao, Tingting Huang, Quanhong Zhu
Summary: Circulating fluidized bed reactors are widely used in the energy industry for gas-solid reactions. They can be classified into two categories based on fluidization regimes: dilute-dense and dual-dense. The concept of dual-dense gas-solid circulating fluidization has not been well understood, hindering its commercial application. This review provides a detailed analysis of the dual-dense system, including mechanism, structural and operating parameters, particle circulation prediction, gas-solid flow simulation, and potential applications, while identifying existing controversies and unresolved issues.
Article
Energy & Fuels
Genyang Tang, Jing Gu, Guoqiang Wei, Zhen Huang, Jiahuan Wu, Haoran Yuan, Yong Chen
Summary: Chemical looping gasification (CLG) is a promising and innovative technology for producing synthesis gases. Using metal oxide as oxygen carrier in CLG can improve the efficiency and feasibility of the system. The research shows that Ca-Fe bimetallic oxygen carriers with porous structure can increase the synthesis gas yield and carbon conversion efficiency, which makes them potential candidates for CLG of cellulose solid waste.
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
Chemistry, Applied
Shen Wang, Xianglei Yin, Kolja Jarolin, Timo Dymala, Jiale Xu, Shangyi Yin, Maksym Dosta, Tao Song, Stefan Heinrich, Laihong Shen
Summary: The study reveals that the mechanical strength evolution of biomass pellets during CLG process is a gradual process from the surface to the internal structure. The penetration of oxygen carrier through pores and/or cracks, along with rapid volatiles release causing internal overpressure, are significant factors leading to breakage and attrition of the internal carbon skeleton. A thermal-damage model is developed to predict the mechanical strength of pellets during CLG process.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Chemical
Nanhang Dong, Ruiqiang Huo, Ming Liu, Lisheng Deng, Zhengbing Deng, Guozhang Chang, Zhen Huang, Hongyu Huang
Summary: The NiO modification can significantly enhance the reactivity of copper slag, contributing to improved sludge conversion, especially for sludge char conversion.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Thermodynamics
Genyang Tang, Jing Gu, Zhen Huang, Haoran Yuan, Yong Chen
Summary: Biomass-derived chemical looping gasification (BCLG) utilizes Ca-Fe oxygen carriers as catalysts to promote efficient lignocellulose conversion and hydrogen-enriched syngas production. Experimental results demonstrate the reaction mechanisms and synergistic effects of Ca-Fe oxygen carriers at different temperatures, providing insights for explaining their performance.
Article
Energy & Fuels
Jinlong Xie, Kang Zhu, Zhen Zhang, Xinfei Chen, Yan Lin, Jianjun Hu, Ya Xiong, Yongqi Zhang, Zhen Huang, Hongyu Huang
Summary: Chemical looping gasification (CLG) technology using NiO-modified hematite as an oxygen carrier enhances the conversion of wood waste into high-quality syngas. The optimal O/W ratio is found to be 1, with a maximum valid gas yield of 0.69 m(3)/kg. Higher reaction temperatures and appropriate steam amount also improve the conversion of wood waste and syngas quality. The reactivity of the NiO-modified hematite remains stable during 20 cycles.
Article
Energy & Fuels
Ming Yang, Da Song, Yang Li, Jinzeng Cao, Guoqiang Wei, Fang He
Summary: This study investigated the chemical looping gasification (CLG) of bituminite using NiFe2O4 oxygen carrier. The changes in the phase of the oxygen carrier during the reaction and the reaction mechanism were explored. The results showed that elevated temperature and adding steam facilitated the gasification reaction, and adding ZrO2 and alkali metal enhanced the performance of the oxygen carrier. The optimized reaction conditions yielded a carbon conversion rate of 95% and a syngas selectivity of 86%. After 20 redox cycles, the carbon conversion rate remained at around 90% and the syngas selectivity was stably maintained above 80%.
Article
Energy & Fuels
Siqi Liu, Fang He, Kun Zhao, Haibo Zhao, Zhen Huang, Guoqiang Wei, Wen Yang
Summary: Coal chemical looping gasification (CCLG) is a promising technology with high resource utilization rate and environmental protection properties, requiring suitable oxygen carriers and optimized operating conditions for coal conversion and H2&CO production. This study tested a Cu-Fe bi-ore oxygen carrier and found that the optimal gasification conditions were at 950 degrees C with a oxygen carrier-to-coal mass ratio of 3:1 and steam rate of 0.08 ml/min, achieving a syngas yield of 58 mmol/g, 75.2% syngas selectivity, and 85.3% carbon conversion.
Article
Engineering, Electrical & Electronic
Zhen Huang, Mi Tang, Dmitry Golovanov, Tao Yang, Scott Herring, Pericle Zanchetta, Christopher Gerada
Summary: This article introduces a new indicator FWTH to analyze the variations in eddy current losses in high-speed permanent magnet machines, and its application in plug-in hybrid electric vehicles is validated.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Chemistry, Applied
Yan Lin, Yuanrui Mo, Shiwen Fang, Zhen Huang, Guoqiang Wei, Zengli Zhao, Hongyu Huang
Summary: Chemical looping combustion (CLC) is a promising technology for sewage sludge disposal. This study investigates the emissions of NOx and its precursors during the pyrolysis and CLC processes, and examines the effects of temperature, ash accumulation, and reaction intermediates. The presence of CO2 and H2O enhances the oxidizability and promotes the formation of NOx. The results provide insights into the formation mechanisms of NOx in the CLC of sewage sludge and the removal efficiencies of NH3, HCN, and total N-containing pollutants.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Xiaoyu Yan, Shuheng Zhao, Jiatao Dang, Jianjun Hu, Panbo Yang, Zhen Huang, Wei Wang
Summary: In this study, phosphorus enrichment in sludge char was successfully induced by combining oxygen carrier gasification technology and microwave heating. The AOC prepared using a SiC particle size of 36 mesh and 10% iron loading achieved a phosphorus enrichment of 91.30% at a temperature of 600 degrees C. Additionally, AOC effectively increased the rate and depth of sludge gasification reaction.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Tao Jin, Hongtao Wang, Jiebang Peng, Yushan Wu, Zhen Huang, Xin Tian, Mingyue Ding
Summary: This study investigated the feasibility of using metal-modified HZSM-5 zeolite as catalysts for monocyclic aromatic hydrocarbons production in lignin catalytic pyrolysis. The 1%Co-HZ catalyst showed excellent performance and resistance to carbon deposition.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Automation & Control Systems
Cheng Wang, Tao Yang, Habibu Hussaini, Zhen Huang, Serhiy Bozhko
Summary: This article proposes a harmonic suppression scheme using a dc-dc converter as an active harmonic injector in a hybrid power generation center to cancel voltage harmonics on the HVdc bus. By developing simplified mathematical models and an active power sharing scheme, the magnitudes of targeted harmonics in the converters can be controlled to achieve harmonic cancellation. A closed-loop control scheme has been developed without additional hardware costs, demonstrating over 90% reduction of a specific harmonic component on the HVdc bus within the power generation center.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Xiaoyu Lang, Tao Yang, Zhen Huang, Cheng Wang, Zhenyu Wang, Serhiy Bozhko, Patrick Wheeler
Summary: This article introduces an advanced power generation center (APGC) that incorporates an extra back-to-back (BTB) converter to improve the stability for both engine and HVdc grid. The BTB converter connects the HP power generation channel and the LP channel, providing an additional power flow path between the two channels. Analytical findings of HVdc grid stability and stability improvement using the APGC architecture have been verified through simulation and experimental results.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Review
Engineering, Electrical & Electronic
Zhen Huang, Tao Yang, Paolo Giangrande, Michael Galea, Patrick Wheeler
Summary: This article provides a comprehensive overview of different structures based on dual inverters and evaluates their performance in MEA applications. The key features of adopting dual inverter topologies are explicitly demonstrated, and a practical guideline for choosing suitable dual inverters for different MEA applications is provided.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Energy & Fuels
Luwen Wang, Yan Lin, Zhen Huang, Kuo Zeng, Hongyu Huang
Summary: In this study, Zr0.5Ce0.5O2 was used to enhance the reactivity of Ca2Fe2O5 oxygen carriers and alleviate sintering issues. The addition of Zr0.5Ce0.5O2 led to improved carbon monoxide yield and cyclic performance of the modified oxygen carriers.
Article
Engineering, Electrical & Electronic
Yuan Gao, Charles Lausseme, Zhen Huang, Tao Yang
Summary: The increasing demand for passenger air travel has led to an unprecedented growth in the aircraft market. However, this growth also raises serious environmental concerns. In order to address this issue, the 2021 United Nations Climate Change Conference (COP26) has set a clear goal of achieving global net-zero emissions by midcentury while limiting temperature rise to 1.5 degrees Celsius. Hydrogen (H-2) propulsion technology is considered one of the most promising solutions to meet these targets and decarbonize the aviation industry. This article reviews the latest research on H-2-electric hybrid aircraft and discusses the potential benefits and challenges of using hydrogen fuel cells in airplanes.
IEEE ELECTRIFICATION MAGAZINE
(2022)
Article
Chemistry, Applied
Ju Huang, Kun Zhao, Shican Jiang, Shunshun Kang, Yan Lin, Zhen Huang, Anqing Zheng, Zengli Zhao
Summary: A novel composite oxide carrier doped by hetematoms was developed for the selective and stable production of C-2(+) hydrocarbons from methane in chemical looping oxidative coupling. Doping with Na improved the surface O- and Mn2+/Mn3+ species content, leading to higher C-2(+) selectivity and yield. Co-doping with W stabilized surface Na species, resulting in stable performance.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zhen Huang, Yonghao Wang, Nanhang Dong, Da Song, Yan Lin, Lisheng Deng, Hongyu Huang
Summary: Tar removal is a crucial issue in biomass gasification, and chemical looping gasification technology shows advantages in low tar generation. Hematite OC exhibits good catalytic and oxidative performance in benzene cracking. Prolonged residence time enhances benzene removal, while the addition of water vapor inhibits benzene conversion.
Article
Engineering, Electrical & Electronic
Xiaoyu Lang, Tao Yang, Zhen Huang, Zhenyu Wang, Serhiy Bozhko, Patrick Wheeler
Summary: This article presents an instantaneous power control technique for regulating the power flow of a back-to-back converter in an advanced power generation center for more-electric aircraft applications. Compared with the previously proposed method, the IPC method allows independent control of active and reactive power transfer, improves dynamic response in power control, and eliminates tedious tuning of control parameters.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Automation & Control Systems
Feng Guo, Tao Yang, Ahmed M. Diab, Zhen Huang, Seang Shen Yeoh, Serhiy Bozhko, Patrick Wheeler
Summary: In this article, a hybrid active modulation approach is proposed to tackle the challenges faced by conventional pulsewidth modulation (PWM) strategies in the aircraft electric starter/generator system. The proposed approach includes coordinate-based PWM for startup process and enhanced carrier-based virtual-space-vector modulation technique for generation mode. Bias-offset injection in the time and voltage domain is used to maintain balanced capacitor voltages. Simulation and experimental results obtained from a test rig validate the effectiveness of the presented algorithm.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Review
Energy & Fuels
Zhen Huang, Xuechun Xiao, Yuan Gao, Yonghong Xia, Tomislav Dragicevic, Pat Wheeler
Summary: The global objective of achieving net-zero emissions drives a significant electrified trend by replacing fuel-mechanical systems with onboard microgrid (OBMG) systems for transportation applications. Energy management strategies (EMS) for OBMG systems require complicated optimization algorithms and high computation capabilities, while traditional control techniques may not meet these requirements. This article provides a comprehensive overview of both information technology, particularly elucidating the role of DT technology, and evaluates and analyzes emerging information technologies.
