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Visible-light photocatalytic fuel cell with Z-scheme g-C3N4/Fe0/TiO2 anode and WO3 cathode efficiently degrades berberine chloride and stably generates electricity
摘要： A visible-light Z-scheme g-C3N4/Fe0/TiO2 anodic catalyst was tested with cathodic WO3 in photocatalytic Fuel Cell (PFC) that efficiently degrades berberine chloride and simultaneously generate electricity at pH 2,5,7 and 13. The Stainless-steel mesh electrodes loaded with prepared catalyst were irradiated by visible-light in single chamber PFC. The highest removal of berberine Chloride, cell voltage, and power density were 91%, 0.8 V, and 16.4 W/m2 at a current density of 2.02 mA/cm2, respectively after 90 min irradiation in 0.05 M Na2SO4 electrolyte, with 10 ? external resistance. The impacts of pH and initial concentration of BEC on photocatalytic degradation and cell voltage were evaluated. The cell current density is enhanced while the photocatalyst activity increased. The constructed PFC maintained high-performance after 5 uses. Its use in degrading wide spectrum refractory pollutants and generate electricity is expected for the proved catalyst design, paired electrodes and high PFC performance for practical wastewater treatment.
关键词： Electricity generation,WO3,Visible-light,g-C3N4/Fe0/TiO2,Photocatalytic Fuel Cell,Berberine Chloride,Z-scheme
更新于2025-09-10 09:29:36
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Prefeasibility techno-economic assessment of a hybrid power plant with photovoltaic, fuel cell and Compressed Air Energy Storage (CAES)
摘要： This paper presents a hybrid power generation system comprising of Photovoltaic (PV) panels, Molten Carbonate Fuel Cell (MCFC), Gas Turbine (GT), Thermal Energy Storage (TES), Battery (Bat) and a Compressed Air Energy Storage (CAES) system. The CAES pressure was considered to be regulated using a water reservoir system located at a suitable height place. The described system was designed to supply the electricity needs of 500 households with peak electricity demand of 500kW. A set up MCFC/GT with power generation rate of 500kW was considered in the calculations, and the PV system capacity was considered to be changed from 100kW to 600kW. The optimal configuration and operational conditions of the system were conducted based on the Levelized Cost of Electricity (LCOE) definition as well as the total annual emission that is occurred by the auxiliary fossil fuel boiler and MCFC systems. The results showed that the overall system efficiency would be increased by about 25%, when the CAES is used and the compressor is switched off. Also, the optimal operational pressure of MCFC was found to be 6bar for 2000 number of PVs, 1500kWh of battery storage and CAES capacity of 685m3.
关键词： PV (Photovoltaic),TES (Thermal storage),CAES (compressed air energy system),Fuel based auxiliary system,MCFC (Molten Carbonate Fuel Cell)
更新于2025-09-09 09:28:46
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CHARACTERIZATION OF NEW NON-STOICHIOMETRIC FERROELECTRIC (Li0.95Cu0.15)Ta0.76Nb0.19O3 AND COMPARATIVE STUDY WITH (Li0.95Cu0.15)Ta0.57Nb0.38O3 AS PHOTOCATALYSTS IN MFCs
摘要： This work investigates the photocatalytic activity of new ferroelectric material with formula (Li0.95Cu0.15)Ta0.76Nb0.19O3 (LT76) in a single chamber microbial fuel cell (MFC) and compare its performance with the similar photocatalyst (Li0.95Cu0.15)Ta0.57Nb0.38O3 (LT57). The photocatalysts LT76 and LT57 were synthesized by ceramic route under the same conditions, with the same starting materials. The ratio Ta/Nb was fixed at 4.0 and 1.5 for LT76 and LT57 respectively. These phases were characterized by different techniques including X-Ray diffraction (XRD), transmission electronic microscopy (TEM), particle size distribution (PSD), differential scanning calorimetric (DSC) and UV-Vis. The new photocatalyst LT76 presents specific surface area about 0.791m2/g and Curie temperature of 1197°C. The photocatalytic efficiency of this material is evaluated in terms of wastewater treatment and electricity generation by power density and removal rate of chemical oxygen demand (COD) in the presence of a light source. The values of the maximum power densities and COD removal were 19.77 mW/m3 and 93% respectively for LT76.
关键词： microbial fuel cell,non-stoichiometry,ferroelectric,Lithium niobate-tantalate,photocatalyst
更新于2025-09-09 09:28:46
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Novel Four-Port DC-DC Converter for Interfacing Solar PV-Fuel Cell Hybrid Sources with Low-Voltage Bipolar DC Microgrids
摘要： Bipolarity in dc microgrids is desirable as it enhances the system reliability and efficiency. However, a bipolar dc microgrid (BDCMG) demands multiple conventional dc-dc converters to feed power to both the poles of the bipolar dc grid. To handle this requirement and to maintain high efficiency, a new four-port, dual-input-dual-output (DIDO) converter topology is proposed for interfacing the solar PV and fuel cell (FC) sources to a low-voltage BDCMG. The proposed topology is unidirectional, efficient, and compact. It has fewer circuit elements with only one inductor as compared to the conventional non-isolated dc-dc converters. The proposed converter regulates one of the pole voltages of the dc bus and also ensures MPPT of the PV source. Further, the converter can be operated as a single-input-dual-output (SIDO) converter. The control complexity of the proposed converter is low as it can be operated in various modes with only one set of controllers. To design the control system for the proposed converter, a small-signal model is derived for each operating mode. Loss modelling and efficiency analysis of the proposed converter are carried out and its efficacy and performance are validated by detailed simulation and experimental results under various operating conditions.
关键词： dc-dc converter,small-signal modelling,Bipolar dc microgrid (BDCMG),fuel cell (FC),state-space averaging,photovoltaic (PV)
更新于2025-09-09 09:28:46
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A synergistic heterostructured ZnO/BaTiO3 loaded carbon photoanode in photocatalytic fuel cell for degradation of Reactive Red 120 and electricity generation
摘要： Photocatalytic fuel cell (PFC) is considered as a sustainable green technology which could degrade organic pollutant and generate electricity simultaneously. A synergistic double-sided ZnO/BaTiO3 loaded carbon plate heterojunction photoanode was fabricated in different ratios by using simple ultrasonication and mixed-annealed method. The double-sided design of photoanode allowed the lights irradiated at both sides of the photoanode. The ferroelectricity fabricated photoanode was applied in a membraneless PFC with platinum-loaded carbon as the cathode. Results revealed that the photoanode with 1:1 ratio of BaTiO3 and ZnO exhibited a superior photocatalytic activity among all the photoanodes prepared in this study. The heterojunction of this photoanode was able to achieve up to a removal efficiency of 93.67 % with a maximum power density of 0.5284 μW cm-2 in 10 mg L-1 of Reactive Red 120 (RR120) without any supporting electrolyte. This photoanode was able to maintain at high performance after recycling 3 times. Over loading of ZnO above 50% on BaTiO3 could lead to deterioration of the performance of PFC due to the charge defects and light trapping ability. The interactions, interesting polarizations of the photocatalysts and proposed mechanism of the n-n type heterojunction in the photoanode of ZnO/BaTiO3 was also discussed.
关键词： Photocatalytic fuel cell,Degradation,Reusability,ZnO/BaTiO3 heterojunction,Electricity Generation
更新于2025-09-09 09:28:46