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Heterogeneous Catalysis Heterogeneous catalysis has traditionally been used for the largescale production of relatively simple molecules—for example, the Haber Bosch process to convert nitrogen and hydrogen into ammonia using Febased catalysts or catalytic cracking of long chain hydrocarbons using zeolites More specifically, the question is whether the oxidative addition of ArX occurs on the surface of the catalyst (heterogeneous catalysis) or on leached metal atoms (homogeneous catalysis)Examples of heterogeneous catalysis The hydrogenation of a carboncarbon double bond The simplest example of this is the reaction between ethene and hydrogen in the presence of a nickel catalyst In practice, this is a pointless reaction, because you are converting the extremely useful ethene into the relatively useless ethane Complexities In Modeling Of Heterogeneous Catalytic Reactions Sciencedirect Heterogeneous catalysis example of heterogeneous catalysis