News Release

Discussion in 'Food and nutrition' started by Sheldon, Mar 15, 2006.

  1. Sheldon

    Sheldon Guest

    The following news release is being issued today by the U.S. Department
    of Energy's Brookhaven National Laboratory. An electronic version, with
    images, can be viewed at:
    http://www.bnl.gov/bnlweb/pubaf/pr/PR_display.asp?prID=06-25

    *******
    NEWS RELEASE
    Number: 06-25
    EMBARGOED FOR RELEASE on Wednesday, March 15, 2006, at 9:48 a.m.
    Eastern time.


    Brookhaven Scientists Working Toward Practical Hydrogen-Storage
    Materials

    UPTON, NY - Hydrogen-storage materials hold the promise of supporting
    many exciting new technologies, such as clean, efficient hydrogen fuel
    cells for automobiles. At the U.S. Department of Energy's Brookhaven
    National Laboratory, scientists are working toward this goal by
    studying the basic mechanisms that underlie reversible hydrogen storage
    in certain materials.

    Currently, a main factor limiting the development of hydrogen-based
    energy technologies, such as fuel cells, is the ability to store a
    sufficient amount of hydrogen in a way that allows for easy and safe
    refueling. One of the most promising materials is titanium-doped sodium
    alanate, a type of material known as a "complex metal hydride." Sodium
    alanate, on its own, is able to store and release a reasonable amount
    of hydrogen, but refueling the spent material requires it to be "doped"
    with a small amount of titanium. The titanium atoms allow sodium
    alanate to work efficiently at realistic temperatures and pressures.

    "Our work focuses on how titanium atoms facilitate the hydrogen uptake
    in sodium alanate," said Brookhaven material scientist Peter Sutter, a
    member of the research team. "Understanding the atomic mechanisms that
    govern this process will guide us in a targeted search for a viable
    material for large-scale hydrogen storage."

    A key step in the refueling process is the splitting of incoming
    hydrogen molecules (hydrogen atoms tend to bind in pairs) into single
    hydrogen atoms. The hydrogen then combines with aluminum and sodium to
    form crystalline sodium alanate. Sutter and his colleagues predict that
    the titanium atoms bind to the aluminum atoms in such a way as to
    create "active sites" where hydrogen molecules are separated and
    ultimately incorporated. These active sites are being studied
    experimentally using scanning tunneling microscopy, a powerful imaging
    technique that is able to image individual atoms at surfaces.

    Erik Muller, a postdoctoral student working with Sutter and a research
    associate in Brookhaven's hydrogen storage research team, will discuss
    their results at the March meeting of the American Physical Society in
    Baltimore, Maryland. He will give his talk at 9:48 a.m. on Wednesday,
    March 15, in Room 312 of the Baltimore Convention Center.


    This research is funded by the Office of Basic Energy Sciences within
    the U.S. Department of Energy's Office of Science.
     
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  2. Dean G.

    Dean G. Guest

    "Currently, a main factor limiting the development of hydrogen-based
    energy technologies, such as fuel cells, is the ability to store a
    sufficient amount of hydrogen in a way that allows for easy and safe
    refueling."

    Bull ! The main limiting factor is what energy source will be used to
    split the water into H and O. Hydrogen is NOT an energy source, it is
    simply a way to store energy. Noting that there are still problems with
    the storage side, we should realize that the so called hydrogen based
    energy technologies are not ready for prime time.

    For more information on this subject, read Robert Zubrin's excellent
    article "An Energy Revolution".
    Available at the following site and many others :
    www.taemag.com/issues/ articleID.18976/article_detail.asp


    Dean G.
     
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