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< Page ,Total 32 >
Exergo-economic analysis for screening of metal hydride pairs for thermochemical energy storage for solar baking system EI SCIE Scopus
期刊论文 | 2022 , 30 | THERMAL SCIENCE AND ENGINEERING PROGRESS
SCOPUS Cited Count: 2
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Abstract :

The novelty of this research work is the exergo-economic analysis (including the cost of exergy destruction and exergy loss) of metal hydride based thermal energy storage system coupled with a solar bakery unit for the screening of metal hydride pairs (Case 1: pure MgH2/LaNi5 & Case 2: V2O5 doped MgH2/LaNi5) for thermo-chemical energy storage. Firstly, a numerical simulation is performed by using COMSOL Multiphysics 5.3a software. Secondly, an economic and exergo-economic model is developed to calculate the annual levelized cost of the thermal energy storage system. The life-cycle economic assessment findings indicate that the Levelized thermal energy storage cost of the pure MgH2 based system (32.28 $ /kWh(th)) is 8.2 times higher than that of the V2O5 doped MgH2 system (3.954 $/kWh(th)). Moreover, an 87.75% decrease in cost was observed in Case 2 (V2O5 doped MgH2). Furthermore, Case 2 (V2O5 doped MgH2) can save 92.58 % of hydrogenation reaction time as compared to Case 1 (Pure MgH2). Ultimately, the selection of V2O5 based MgH(2 & nbsp;)as a thermal heat-storing me-dium is then assessed as a better option for the MHTES for the solar bakery unit (SBU). The findings of this research provide a clear insight into the mechanism of cost formation in the system.

Keyword :

Annual levelized cost of the thermal energy & nbsp;storage system Exergo-economic analysis Exergy destruction and loss cost Metal hydride based thermal energy storage Screening of metal hydride pair

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GB/T 7714 Ayub, Iqra , Nasir, Muhammad Salman , Liu, Yang et al. Exergo-economic analysis for screening of metal hydride pairs for thermochemical energy storage for solar baking system [J]. | THERMAL SCIENCE AND ENGINEERING PROGRESS , 2022 , 30 .
MLA Ayub, Iqra et al. "Exergo-economic analysis for screening of metal hydride pairs for thermochemical energy storage for solar baking system" . | THERMAL SCIENCE AND ENGINEERING PROGRESS 30 (2022) .
APA Ayub, Iqra , Nasir, Muhammad Salman , Liu, Yang , Munir, Anjum , Wu, Zhen , Yang, Fusheng et al. Exergo-economic analysis for screening of metal hydride pairs for thermochemical energy storage for solar baking system . | THERMAL SCIENCE AND ENGINEERING PROGRESS , 2022 , 30 .
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Systematic study of an energy efficient MEA-based electrochemical CO2 capture process: From mechanism to practical application EI SCIE Scopus
期刊论文 | 2022 , 327 | APPLIED ENERGY
SCOPUS Cited Count: 9
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Abstract :

Electrochemically-mediated amine regeneration (EMAR) is a promising technology for CO2 capture, especially in industries where thermal energy is not available. However, the EMAR technology is still at an early stage for commercial application because of its energy-intensive, operating at impractically low current densities, kinet-ically slow or amine degradation. To solve these problems, we report an energy efficient MEA-based electro-chemical CO2 capture process. The redox of copper is the fundamental step in the EMAR process, which determines the energy consumption, energy efficiency and cycling performance of the whole system. A sys-tematic study of the redox reactions of copper ions and the effect of other mediums have been comprehensively studied in this work. Besides, amine oxidative degradation in EMAR has been firstly discussed from the perspective of the solution electrochemical mechanism. Moreover, the copper cycling performance and energy consumption of the proposed system have been carefully studied, results show that a suitable current density and appropriate disturbance are beneficial to improve the circulation performance of the system. The regeneration energy consumption is 60.76 kJ/mol CO2, with a current density of 0.02 A/cm2 and stirring speed of 200 rpm, which is extremely competitive to be used in CO2 capture compared with traditional CO2 chemical absorption methods.

Keyword :

CO2 capture Electrochemically mediated amine Electrochemical mechanism study Monoethanolamine (MEA) regeneration (EMAR)

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GB/T 7714 Wu, Xiaomei , Fan, Huifeng , Mao, Yuanhao et al. Systematic study of an energy efficient MEA-based electrochemical CO2 capture process: From mechanism to practical application [J]. | APPLIED ENERGY , 2022 , 327 .
MLA Wu, Xiaomei et al. "Systematic study of an energy efficient MEA-based electrochemical CO2 capture process: From mechanism to practical application" . | APPLIED ENERGY 327 (2022) .
APA Wu, Xiaomei , Fan, Huifeng , Mao, Yuanhao , Sharif, Maimoona , Yu, Yunsong , Zhang, Zaoxiao et al. Systematic study of an energy efficient MEA-based electrochemical CO2 capture process: From mechanism to practical application . | APPLIED ENERGY , 2022 , 327 .
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Analysis of Impact of a Novel Combined Casing Treatment on Flow Characteristics and Performance of a Transonic Compressor SCIE Scopus
期刊论文 | 2022 , 15 (14) | ENERGIES
SCOPUS Cited Count: 1
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Abstract :

To reduce the negative impacts of stall and surge on compressor performance, a novel combined casing treatment (CCT) structure with axial skewed slots and injection groove is proposed in this paper. The aerodynamic performance, as well as the mechanisms of loss generation, of a transonic axial compressor with NASA Rotor 67 are investigated numerically. The simulation results indicate that, compared with individual casing treatment method, the CCT works effectively with regard to operation performance. The stall margin (SM) is increased by 14.7% with 1.12% decrease in the peak efficiency. The interaction of axial skewed slots and injection groove can be explained by the enhancement of exchange flow in slots and axial motion of fluid. As a result, the leakage flow near the blade tip is eliminated and the flow separation is further suppressed. What is more, an analysis of entropy generation is also conducted. The results reveal that the effect of CCT on loss reduction mainly concentrates in the tip part of the blade, with the loss decrease about 14.46% compared with the original rotor. The best control effect can be expected by appropriate match between geometrical parameters of axial skewed slots and mass flow rate of injection from the parameter analysis.

Keyword :

axial skewed slot combined casing treatment end-wall injection entropy generation transonic compressor

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GB/T 7714 Liu, Jia-Xuan , Yang, Fu-Sheng , Huo, Tian-Qing et al. Analysis of Impact of a Novel Combined Casing Treatment on Flow Characteristics and Performance of a Transonic Compressor [J]. | ENERGIES , 2022 , 15 (14) .
MLA Liu, Jia-Xuan et al. "Analysis of Impact of a Novel Combined Casing Treatment on Flow Characteristics and Performance of a Transonic Compressor" . | ENERGIES 15 . 14 (2022) .
APA Liu, Jia-Xuan , Yang, Fu-Sheng , Huo, Tian-Qing , Deng, Jian-Qiang , Zhang, Zao-Xiao . Analysis of Impact of a Novel Combined Casing Treatment on Flow Characteristics and Performance of a Transonic Compressor . | ENERGIES , 2022 , 15 (14) .
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Numerical investigation of metal hydride heat storage reactor with two types multiple heat transfer tubes structures EI SCIE Scopus
期刊论文 | 2022 , 253 | ENERGY
SCOPUS Cited Count: 12
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Abstract :

Metal hydride, as one of the potential materials, has a substantial thermal effect on the reaction, which can degrade reactor efficiency if heat is not transmitted effectively. In this research article, two types multiple heat transfer tubes (MHTT) reactors with center tube (CT) and no central tube (NCT) are proposed to enhance radial heat transfer. The three-dimensional thermal coupling model between MHTT and bed is established. It is found that the most uniform heat and mass transfer effects occur when the position ratios of CT and NCT are 0.62 and 0.56, respectively. The heat transfer mechanism analysis reveals that the CT and NCT operate on the basis of the processes of formation, diffusion, and fusion of multiple reaction fronts, as well as the movement of a new reaction front. According to the optimization calculation, the best performance of the CT and NCT is achieved when the number of tubes in the CT and NCT is 7 and 3, respectively. CT has better performance as compared to NCT. In particular, gravimetric exergy-output power of reactor (GEOPR) increases from 10.22 W kg-1 to 61.41 W kg-1. Furthermore, it has been demonstrated that the performance of CT is superior to the other structures. (c) 2022 Elsevier Ltd. All rights reserved.

Keyword :

Comparative analysis Design optimization Heat transfer mechanism Metal hydride rector Multiple heat storage tubes Radial heat transfer

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GB/T 7714 Liu, Yang , Ayub, Iqra , Khan, Muhammad Raheel et al. Numerical investigation of metal hydride heat storage reactor with two types multiple heat transfer tubes structures [J]. | ENERGY , 2022 , 253 .
MLA Liu, Yang et al. "Numerical investigation of metal hydride heat storage reactor with two types multiple heat transfer tubes structures" . | ENERGY 253 (2022) .
APA Liu, Yang , Ayub, Iqra , Khan, Muhammad Raheel , Yang, Fusheng , Wu, Zhen , Zhang, Zaoxiao . Numerical investigation of metal hydride heat storage reactor with two types multiple heat transfer tubes structures . | ENERGY , 2022 , 253 .
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Characterization of Pt/g-C3N4-Catalyzed Methanol Oxidation to Drive Peroxygenase-Catalyzed Oxyfunctionalization of Hydrocarbons SCIE Scopus
期刊论文 | 2022 | ACS SUSTAINABLE CHEMISTRY & ENGINEERING
SCOPUS Cited Count: 5
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Abstract :

The photobiocatalysis combining photocatalysts and enzymes provides new strategies for organic synthesis and energy conversion. However, the available photocatalysts used in photobiocatalysis are still limited. Herein, highly dispersed Pt nanoparticles supported on graphitic carbon nitride (Pt/g-C3N4) were designed and applied for the light-driven in situ generation of H2O2, which was subsequently supplied to peroxygenase for selective oxyfunctionalization of C-H bonds. Substrates with activated and non-activated C-H bonds were hydroxylated into the corresponding alcohols with an enantiomeric excess of up to 99% and a turnover number of 133,000, which was about four times higher than that of unsupported g-C3N4 catalysts. Further mechanistic study by UV-vis, static photoluminescence spectroscopy, and DFT calculations revealed that the effective absorption of visible light by Pt nanoparticles on the surface of g-C(3)N(4 )and the strong interaction between O-2 and the g-C3N4 surface were advantageous to improve the performance of photobiocatalysis. This research provides new insights into the fabrication of efficient photocatalysts compatible with peroxyzymes, paving the way for synergistic photobiocatalysis for selective oxyfunctionalization of hydrocarbons.

Keyword :

biocatalysis oxyfunctionalization peroxygenase photobiocatalysis photocatalysis

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GB/T 7714 Shen, Qianqian , Zhang, Chen , Chen, Lei et al. Characterization of Pt/g-C3N4-Catalyzed Methanol Oxidation to Drive Peroxygenase-Catalyzed Oxyfunctionalization of Hydrocarbons [J]. | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2022 .
MLA Shen, Qianqian et al. "Characterization of Pt/g-C3N4-Catalyzed Methanol Oxidation to Drive Peroxygenase-Catalyzed Oxyfunctionalization of Hydrocarbons" . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2022) .
APA Shen, Qianqian , Zhang, Chen , Chen, Lei , Huang, Boqiang , Yu, Yunsong , Zhang, Zaoxiao et al. Characterization of Pt/g-C3N4-Catalyzed Methanol Oxidation to Drive Peroxygenase-Catalyzed Oxyfunctionalization of Hydrocarbons . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2022 .
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基于金属氢化物高温蓄热的氢热耦合传递机理 EI CSCD
期刊论文 | 2021 , 72 (9) , 4607-4615 | 化工学报
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Abstract :

目前大多数可再生能源如太阳能具有间歇性和不稳定性的问题,因此高效蓄热技术成为了发展太阳能的一个关键途径.金属氢化物高温蓄热技术作为热化学蓄热中最有前途的方法之一,受到了人们的广泛关注.为了实现金属氢化物高温蓄热技术的工程应用,明确其氢热耦合传递机理至关重要.本研究采用数值模拟的方法,通过建立反应器的多物理场耦合模型,讨论了不同时刻下床层内部参数的分布,得到了反应锋面的形成和移动机理以及非均匀反应的形成机理;此外,结合反应器内部氢压、接触热阻和床层热阻的变化规律,明确了不同阶段下金属氢化物高温蓄热技术的控制环节;最后,依据金属氢化物高温蓄热技术的工程应用挑战,提出了相应的研究策略.

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GB/T 7714 刘洋 , Iqra AYUB , 杨福胜 et al. 基于金属氢化物高温蓄热的氢热耦合传递机理 [J]. | 化工学报 , 2021 , 72 (9) : 4607-4615 .
MLA 刘洋 et al. "基于金属氢化物高温蓄热的氢热耦合传递机理" . | 化工学报 72 . 9 (2021) : 4607-4615 .
APA 刘洋 , Iqra AYUB , 杨福胜 , 吴震 , 张早校 . 基于金属氢化物高温蓄热的氢热耦合传递机理 . | 化工学报 , 2021 , 72 (9) , 4607-4615 .
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Large Eddy Simulation Investigations of Periodic Cavitation Shedding With Special Emphasis on Three-Dimensional Asymmetry in a Scaled-Up Nozzle Orifice EI SCIE
期刊论文 | 2021 , 143 (7) | JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
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Abstract :

The periodic shedding of cloud cavitation in a nozzle orifice has a significant influence on the flow field and may have destructive effects. Most of the existing research on the shedding of cloud cavitation in an orifice is based on experimental visualization with a focus on the two-dimensional (2D) motion of the re-entrant jet and the shedding mechanism. However, the actual cloud cavitation shedding in an orifice is a complex three-dimensional (3D) process. Some limited signs of three-dimensionality and asymmetry in cylindrical orifices have been detected recently, but the 3D shedding characteristics remain unclear. In this paper, the cavitation regimes and periodic shedding process in the scaled-up nozzle orifice used by the Stanley experiment were simulated with large eddy simulation (LES). The re-entrant jet and periodic shedding mechanism, as well as, the shedding frequency, were analyzed from 2D and 3D perspectives. The main results show that the simulated cavitation regimes and the 2D periodic shedding mechanism agree fairly well with the experimental observations, but more 3D features are revealed. By analyzing the 3D shedding process and the three-dimensionality caused by the inclination of the closure line, the three-dimensional asymmetric shedding mode with phase difference pi is revealed. Based upon this finding, the shedding frequency, and Strouhal number are calculated. The corresponding relationships between shedding frequencies and the frequency peaks of the power spectrum density (PSD) for pressure fluctuations are also confirmed. These results extend the understanding of the unsteady cavitating flow within nozzle orifices from 2D to 3D patterns.

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GB/T 7714 Bai, Wenjie , Tijsseling, Arris S. , Wang, Jun et al. Large Eddy Simulation Investigations of Periodic Cavitation Shedding With Special Emphasis on Three-Dimensional Asymmetry in a Scaled-Up Nozzle Orifice [J]. | JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME , 2021 , 143 (7) .
MLA Bai, Wenjie et al. "Large Eddy Simulation Investigations of Periodic Cavitation Shedding With Special Emphasis on Three-Dimensional Asymmetry in a Scaled-Up Nozzle Orifice" . | JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME 143 . 7 (2021) .
APA Bai, Wenjie , Tijsseling, Arris S. , Wang, Jun , Duan, Quan , Zhang, Zaoxiao . Large Eddy Simulation Investigations of Periodic Cavitation Shedding With Special Emphasis on Three-Dimensional Asymmetry in a Scaled-Up Nozzle Orifice . | JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME , 2021 , 143 (7) .
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Light to enhance CO2 capture by a flexible heterostructure EI SCIE
期刊论文 | 2021 , 159 | Chemical Engineering and Processing - Process Intensification
WoS CC Cited Count: 1
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Abstract :

Based on photovoltaic effect and annealing,a flexible liquid-solid heterostructure of PANI and PyBIG based on carbon nano-tube (CNT) is prepared to drive the low temperature (343 K–363 K) CO2 desorption intensified by the light. By the DFT and experiment, the reaction mechanism is determined as electron and hole produced by the light, deprotonization, electron and hole transport, and CO2 release. The flexible characteristic of the heterostructure is identified as interface slip, transport channel change and stretching phenomenon in the nano-scale. The repelling effect between water molecule and oil molecule enhances the −COO-H bond breaking and -NH2 production. The stretching phenomenon makes the electron and hole transport along the line rather than in a circle. The CO2 desorption reaction energy is determined as low as 11.42 kJ/mol. The energy consumption of heterostructure to drive the CO2 desorption at 343 K–363 K is determined as 0.89 GJ/t-1.12 GJ/t, which is much lower than the conventional 2.2 GJ/t-2.8 GJ/t. © 2020 Elsevier B.V.

Keyword :

Carbon dioxide Carbon nanotubes Desorption Energy utilization Molecules Photovoltaic effects Temperature

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GB/T 7714 Yu, Yunsong , Zhang, Chen , Sharif, Maimoona et al. Light to enhance CO2 capture by a flexible heterostructure [J]. | Chemical Engineering and Processing - Process Intensification , 2021 , 159 .
MLA Yu, Yunsong et al. "Light to enhance CO2 capture by a flexible heterostructure" . | Chemical Engineering and Processing - Process Intensification 159 (2021) .
APA Yu, Yunsong , Zhang, Chen , Sharif, Maimoona , Zhang, Zaoxiao , Wei, Jinjia , Wang, Geoff G.X . Light to enhance CO2 capture by a flexible heterostructure . | Chemical Engineering and Processing - Process Intensification , 2021 , 159 .
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A multi-function desalination system based on hydrolysis reaction of hydride and fuel cell water recovery EI SCIE Scopus
期刊论文 | 2021 , 247 | Energy Conversion and Management
WoS CC Cited Count: 2 SCOPUS Cited Count: 5
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Abstract :

Desalination is an important method to take full advantage of the sea water to produce fresh water. However, the systems or devices reported previously still have the limitations in the energy supply and portability when used in some specific application scenarios, such as island and remote coastal area. In this paper, a multi-function desalination system is proposed, which could provide fresh water, electrical energy, and even the cold energy based on the hydrolysis reaction of hydride and fuel cell water recovery. Besides, the system could be modified to increase the flexibility of the system operation to satisfy the various energy demands under different conditions. A lumped parameter model of the proposed system is developed to evaluate the system performance. The results show that the fuel cell helps to increase the absolute humidity of the wet air by 15.5% and to increase the water production by condensing the wet air by 1.8 times compared with simple water harvest from the ambient environment. The modified system demonstrates more stable performance of the water production than the original desalination system, which means that the modified system is less affected by the parameter variation. The maximum water production of the kW level system could achieve 11.10 kg/h. Comparing with the previous reports, the unit power consumption of the modified system could reach the lowest level (about 880 Wh/kg), showing the promising water production performance of the system developed in this work. © 2021 Elsevier Ltd

Keyword :

Desalination Fuel cells Hydrides Hydrolysis Molecular biology Recovery Seawater

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GB/T 7714 Yao, Jing , Guo, Leilei , Zhu, Pengfei et al. A multi-function desalination system based on hydrolysis reaction of hydride and fuel cell water recovery [J]. | Energy Conversion and Management , 2021 , 247 .
MLA Yao, Jing et al. "A multi-function desalination system based on hydrolysis reaction of hydride and fuel cell water recovery" . | Energy Conversion and Management 247 (2021) .
APA Yao, Jing , Guo, Leilei , Zhu, Pengfei , Yang, Fusheng , Yan, Hongli , Kurko, Sandra et al. A multi-function desalination system based on hydrolysis reaction of hydride and fuel cell water recovery . | Energy Conversion and Management , 2021 , 247 .
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Multi-physics field modeling of biomass gasification syngas fueled solid oxide fuel cell EI SCIE Scopus
期刊论文 | 2021 , 512 | JOURNAL OF POWER SOURCES
SCOPUS Cited Count: 20
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Abstract :

In order to uncover the inner working mechanism and performance of solid oxide fuel cell (SOFC) with biomass gasification syngas as fuel, a two dimensional SOFC multi-physical field model is established. This study makes up for the deficiency that the previous studies of coupling biomass gasification unit and SOFC stack mostly stay at the system level. The results show that the SOFC fueled by the syngas produced from gasification of biomass with steam as the agent has the best performance. The peak power density could achieve approximately 10240 W m- 2. With the improvement of operating temperature, the peak power density of SOFC will be increased. At the temperature of 1123 K, the peak power density could achieve about 15128 W m- 2. The average reaction rate of water gas shift (WGS) reaction is -29.73 mol m- 3 s-1 when the operating temperature is 1123 K. This indicates that the WGS reaction will proceed in reverse direction at high temperatures, thereby reducing the hydrogen concentration. In addition, increase in the anode flux and decrease in the cell length lead to the increase of SOFC current density. In general, this work could provide guidance for the optimization and practical application of SOFC using biomass syngas as fuel.

Keyword :

Chemical reaction Mass transfer Multi-physics modeling Solid oxide fuel cell

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GB/T 7714 Zhu, Pengfei , Wu, Zhen , Yao, Jing et al. Multi-physics field modeling of biomass gasification syngas fueled solid oxide fuel cell [J]. | JOURNAL OF POWER SOURCES , 2021 , 512 .
MLA Zhu, Pengfei et al. "Multi-physics field modeling of biomass gasification syngas fueled solid oxide fuel cell" . | JOURNAL OF POWER SOURCES 512 (2021) .
APA Zhu, Pengfei , Wu, Zhen , Yao, Jing , Guo, Leilei , Yan, Hongli , Nyamsi, Serge Nyallang et al. Multi-physics field modeling of biomass gasification syngas fueled solid oxide fuel cell . | JOURNAL OF POWER SOURCES , 2021 , 512 .
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