The theory proposed here is that a hydrogen fuel cell ..
See our to learn more about the advantages and disadvantages of each fuel cell type, or find information about .
The role of hydrogen and fuel cells for ultra low carbon vehicles
Secanell has been awarded an NSERC Discovery grant to pursue research in the area of functionally-graded fuel cell electrode design and fabrication and design and optimization of fuel cell flow fields.
Plans are for Sundrop Fuels to achieve a combined production capacity of more than one billion gallons by 2020—a significant percentage of the cellulosic advanced biofuels goal set by the nation’s Renewable Fuels Standard (RFS).
Fuel Cells and Hydrogen Technology - Aalborg University
The hydrogen atom is composed of one proton and one electron, making it the lightest element in the universe. It is also the most abundant element in the universe, making up more than 90% of all known matter. The abundance of hydrogen on earth, minimal environmental consequences of its use and the need to replace fossil fuels, makes it the ideal fuel of the future.
This article reviews some of the recent developments in the materials, design, and concepts for bipolar/end plates in the polymer electrolyte membrane fuel cell stack. Experimental results for the use of iron- and copper-based alloys for bipolar plate as an alternative to the expensive conventionally used graphite material are presented. The developments of the models for optimizing the design parameters in the gas flow-field of these plates are discussed. Based on these simulations results, some of the new concepts for these plates were urbanized. These include: use of metal foam in the gas flow-field, and corrugated thin sheet bipolar/end plate. Experimental results with these new concepts are presented and will be compared with the model-predicted results. Applications of these new concepts in the development of commercial fuel cell stacks in the era of hydrogen economy are discussed.
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The technical suitability of hydrogen for railway traction is evaluated in the research. World-wide, diesel fuel is currently the main source of energy for railways but relies on petroleum and emits greenhouse gases. Hydrogen as a secondary energy can be produced from fossil fuels or renewables. Thus, a decrease or elimination of emissions is possible, and reliance on petroleum reduced. A well-to-wheel analysis for diesel, electricity, and hydrogen was conducted to establish overall efficiencies and emissions. The results show that hydrogen fuel cell traction has a similar efficiency to electric traction and reduces carbon emissions compared to diesel and in some case electric railways, if the hydrogen feedstock is natural gas. Renewable hydrogen would reduce emissions further. A prototype hydrogen-powered locomotive, the first in the UK, was constructed and employed for a performance evaluation; both demonstrated that hydrogen is suitable for railway traction. Computer modelling of a diesel-electric regional train, a hydrogen-powered vehicle, and a hydrogen-hybrid version was conducted. The journey time and the range of all three options was the same while energy reductions of 34 % for the hydrogen-only and 55 % for the hydrogen-hybrid, compared to the diesel were achieved.
The problems of transport technology were analysed; present vehicles are polluting, inefficient and run largely on unsustainable fossil fuels.
The theory proposed here is that a hydrogen fuel cell battery hybrid system is the best for future vehicles; zero emission, twice as efficient and running on renewable hydrogen from biomass, wind or solar.
Early testing compared a crude Micro-cab prototype (compressed hydrogen, Ballard fuel cell, lead acid batteries and an electric motor) with a hydrogen combustion dual fuel van to assess the technical demands of the proposed technology.
Then a battery scooter was modified and tested to show that a plug-in hydrogen battery hybrid with hydride store could have benefits which were quantifiable. A computer model was developed to predict the performance of this system. Reducing dissipation by removing DC converters was shown to be beneficial.
A prototype Micro-cab was analysed and tested to show how improved drivetrain components could increase the vehicle efficiency.
The main part of the project was to use these ideas to build an urban car driven by a plug-in hydrogen fuel cell lithium ion battery hybrid with efficient motors, no DC/DC converters and belt/pulley drive. The results showed that with a 2kg pressurised hydrogen store at 350bar, such a vehicle had good urban performance and a range of 200miles.
The conclusion was that the overall design concepts were correct and that costs and hydrogen infrastructure were the main future difficulties of future application.
Pesquise Fuel Cell Hydrogen. Ache Resultados de 6 Mecanismos
Hydrogen Fuel Cell Research Paper - 841 Words
(2013)Modelling and control of proton exchange membrane fuel cell. PhD thesis, James Cook University.
When pure hydrogen is used in a fuel cell, ..
Secanell who was elected as a vice-chair of the in Fuel Cells for 2018 and chair of 2020 conference together with Dr.
Hydrogen, Fuel Cells and their Applications MRes
This site discusses "hydroxyl radical" generators for use in aquaculture applications, and is full of nonsense:
12/01/2018 · The MRes in Hydrogen, Fuel Cells and ..
Alkaline fuel cells (AFCs) were one of the first fuel cell technologies developed, and they were the first type widely used in the U.S. space program to produce electrical energy and water on-board spacecraft. These fuel cells use a solution of potassium hydroxide in water as the electrolyte and can use a variety of non-precious metals as a catalyst at the anode and cathode. In recent years, novel AFCs that use a polymer membrane as the electrolyte have been developed. These fuel cells are closely related to conventional PEM fuel cells, except that they use an alkaline membrane instead of an acid membrane. The high performance of AFCs is due to the rate at which electro-chemical reactions take place in the cell. They have also demonstrated efficiencies above 60% in space applications.
Mediagazer presents the fuel cell system
A key challenge for this fuel cell type is that it is susceptible to poisoning by carbon dioxide (CO2). In fact, even the small amount of CO2 in the air can dramatically affect cell performance and durability due to carbonate formation. Alkaline cells with liquid electrolytes can be run in a recirculating mode, which allows for electrolyte regeneration to help reduce the effects of carbonate formation in the electrolyte, but the recirculating mode introduces issues with shunt currents. The liquid electrolyte systems also suffer from additional concerns including wettability, increased corrosion, and difficulties handling differential pressures. Alkaline membrane fuel cells (AMFCs) address these concerns and have lower susceptibility to CO2 poisoning than liquid-electrolyte AFCs do. However, CO2 still affects performance, and performance and durability of the AMFCs still lag that of PEMFCs. AMFCs are being considered for applications in the W to kW scale. Challenges for AMFCs include tolerance to carbon dioxide, membrane conductivity and durability, higher temperature operation, water management, power density, and anode electrocatalysis.
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Direct methanol fuel cells do not have many of the fuel storage problems typical of some fuel cell systems because methanol has a higher energy density than hydrogen—though less than gasoline or diesel fuel. Methanol is also easier to transport and supply to the public using our current infrastructure because it is a liquid, like gasoline. DMFCs are often used to provide power for portable fuel cell applications such as cell phones or laptop computers.
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