en

poison

3

Terminological databases

EKI terminibaas Esterm

ID 732479 Last modified 12.01.2016
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Domain chemical technology
catalyst poison preferred
  • substance that reduces the effectiveness of a catalyst in a chemical reaction
Good to know
  • Commonly encountered poisons include carbon on the silica–alumina catalyst in the cracking of petroleum; sulfur, arsenic, or lead on metal catalysts in hydrogenation or dehydrogenation reactions; and oxygen and water on iron catalysts used in ammonia synthesis.
katalüsaatorimürk
catalyst poison preferred
poison
Usage examples
  • In theory, because catalysts are not consumed in chemical reactions, they can be used repeatedly over an indefinite period of time. In practice, however, poisons, which come from the reacting substances or products of the reaction itself, accumulate on the surface of solid catalysts and cause their effectiveness to decrease.

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