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Contents contributed and discussions participated by Rajmund Niwinski

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Rajmund Niwinski

Gale Science In Context - Document - 2 views

ic.galegroup.com/...MagazinesDetailsWindow

shared by Rajmund Niwinski on 14 Feb 13 - No Cached
  • iron-catalyzed Haber-Bosch process for ammonia synthesis
    • Rajmund Niwinski
      Rajmund Niwinski on 14 Feb 13
       
      The Haber process involves using overflow of reactants and removal of products to maximize ammonia production.
  • 150 to 550 atmospheres
    • Rajmund Niwinski
      Rajmund Niwinski on 14 Feb 13
       
      We learned that it was 200 atm. Which is it really?
  • high temperatures
    • Rajmund Niwinski
      Rajmund Niwinski on 14 Feb 13
       
      These are needed to keep a high forward reaction rate.
  • ...11 more annotations...
  • The metalloenzymes, called nitrogenases
    • Rajmund Niwinski
      Rajmund Niwinski on 14 Feb 13
       
      These act like the iron catalyst in the Haber process.
  • more energy-efficient process than Haber-Bosch
    • Rajmund Niwinski
      Rajmund Niwinski on 14 Feb 13
       
      Interesting: The same process has been used for almost a hundred years.
  • Perhaps a thousand man-years and billions of dollars have been spent studying how nitrogenases work and trying to make artificial ones
  • Perhaps a thousand man-years and billions of dollars have been spent studying how nitrogenases work and trying to make artificial ones.
  • Perhaps a thousand man-years and billions of dollars have been spent studying how nitrogenases work and trying to make artificial ones.
  • Perhaps a thousand man-years and billions of dollars have been spent studying how nitrogenases work and trying to make artificial ones.
  • Perhaps a thousand man-years and billions of dollars have been spent studying how nitrogenases work and trying to make artificial ones
  • Perhaps a thousand man-years and billions of dollars have been spent studying how nitrogenases work and trying to make artificial ones
  • Perhaps a thousand man-years and billions of dollars have been spent studying how nitrogenases work and trying to make artificial ones
  • Perhaps a thousand man-years and billions of dollars have been spent studying how nitrogenases work and trying to make artificial ones
  • Perhaps a thousand man-years and billions of dollars have been spent studying how nitrogenases work and trying to make artificial ones
Rajmund Niwinski

Gale Science In Context - Document - 9 views

ic.galegroup.com/...DocumentToolsPortletWindow

shared by Rajmund Niwinski on 14 Feb 13 - No Cached
  • the Haber-Bosch process.
    • Rajmund Niwinski
      Rajmund Niwinski on 14 Feb 13
       
      This is the process by which ammonia is industrially made
  • Urea eventually reacts with water to form ammonia
    • Rajmund Niwinski
      Rajmund Niwinski on 14 Feb 13
       
      Could this be used to produce usable ammonia?
  • A recent toxic substance inventory done by the United States government estimated that in 1989, 200,000 tons of ammonia were released into the environment.
    • Rajmund Niwinski
      Rajmund Niwinski on 14 Feb 13
       
      This raises the question of the extent to which we should be controlling production of pollutants; in this case, it is ammonia.
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