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• n  a chemical process that adds hydrogen atoms to an unsaturated oil
  food producers use hydrogenation to keep fat from becoming rancid

• Food processors use liquid hydrogen to stiffen oils into shortening through "hydrogenation.
• Cracking, of which hydrogenation is a continuation, consists of breaking down the molecular structure of heavy crude oil into a number of lighter, more salable derivatives such .
• It is not the same as hydrogenation and does not affect the trans fat content of oils.

News & Articles

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• Making hydrogenation greener: Using iron as catalyst for widely used chemical process, replacing heavy metals
  Researchers have discovered a way to make the widely used chemical process of hydrogenation more environmentally friendly -- and less expensive.
  June 28, 2013 - Science Daily
• Making hydrogenation greener
  ( McGill University ) Researchers from McGill University, RIKEN and the Institute for Molecular Science have discovered a way to make the widely used chemical process of hydrogenation more environmentally friendly -- and less expensive.
  June 27, 2013 - EurekAlert!
• New iron catalyst promises green future for hydrogenation
  A new iron nanoparticle catalyst promises to drastically improve the efficiency of hydrogenation, a key chemical process used in a wide array of industrial applications. Cleaner, safer and cheaper than traditional rare metal-based catalysts, the new, more environmentally friendly technique marks a breakthrough for the emerging field of green chemistry.
  June 27, 2013 - Science Daily