Quizzed article | REF: J1250 V3

Heterogeneous catalysis- Operating mode of catalysts

Authors: Michel GUISNET, Ludovic PINARD

Publication date: June 10, 2019, Review date: October 23, 2020 | Lire en français

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    1. General features

    1.1 What is a catalyst?

    A catalyst is a substance, solid, liquid or gas, which increases the speed of a chemical reaction without appearing in the final products.

    Figures 1 and 2 show two reaction examples:

    • the first mono-molecular, isomerization of A into B,

    • the second is bimolecular, with the addition of A and B leading to two products, C and D,

    • that the catalyst opens up a new, easier path than stoichiometric (non-catalytic) transformations....

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