Various assumptions are commonly used in catalysis models. These include:
Steady-State Approximation: Assumes that the concentration of intermediate species remains constant over time. Langmuir-Hinshelwood Mechanism: Assumes that the reaction occurs on the catalyst surface, and the adsorption of reactants follows Langmuir isotherms. Rate-Determining Step: Assumes that one step in the reaction mechanism is significantly slower than others, thus determining the overall reaction rate. Ideal Gas Behavior: Assumes that gases involved in the reaction behave ideally, which simplifies the mathematical treatment. Uniform Catalyst Surface: Assumes that the catalyst surface is uniform and all active sites are equivalent.