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Thread: Hydrogen Fuel Using Carbon Nanotube

  1. #1 Hydrogen Fuel Using Carbon Nanotube 
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    Mar 2010
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    Hydrogen as a Fuel:

    Hydrogen is the secondary form of stored energy for mobile applications and load balancing. It is typically discussed as an alternative to Solar Energy or as a backup power supply. Many barriers need to be overcome for the hydrogen economy to become a reality. These include producing the hydrogen (for which adequate sources of electricity are needed), transporting it and storing it.
    Nanotechnology may play a role in helping to meet these challenges. Highlighted below are ways in which nanotechnology may help address hydrogen storage problems. Because hydrogen is the smallest element, it can escape from tanks and pipes more easily than conventional fuels.
    There are two ways to store Hydrogen in materials. One way involves absorption of the Hydrogen within the material, and the other is to store the Hydrogen in a container. The challenge for absorption is to control the diameter of the nanotube so that the absorption energy of hydrogen on the outside and inside of the tube is high enough to provide the desired storage capacity at an acceptable pressure. If the absorption behaviour of the optimized tube is acceptable, the challenge then is to develop a process capable of producing the material ata reasonable cost.
    Single-walled CNTs are a leading candidate for solving the storage problem for hydrogen-fueled machines. However, if this approach cannot be carried out, CNTs could still facilitate storage in a container. Small hydrogen-fuelled vehicles would have a pressurized tank, and large hydrogen-fuelled vehicles, ships, and planes would have a cryogenic liquid hydrogen tank. In this case, CNTs may be used in super-strong composites in the bodies of the machines to make them lighter.
    Additional options might include metal nanoclusters which have been shown to be some of the best catalysts available for reversible hydrogen storage. Core-shell cobalt nanoparticles with tailored chemical compositions can provide protection against corrosive environments. The nanoparticles can easily be removed, leaving a graphite carbon shell. The low-density shell’s excellent permeability and electron conductivity make it a candidate for hydrogen storage applications.


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