Interfering gases can affect catalysis in multiple ways:
1. Catalyst Poisoning: Some gases, such as CO and sulfur compounds, can adsorb strongly onto the active sites of the catalyst, thereby blocking these sites from participating in the desired reaction. This phenomenon is known as catalyst poisoning.
2. Side Reactions: Interfering gases can lead to side reactions that produce unwanted byproducts. For example, NH₃ can react with oxygen to form NOₓ gases, which are pollutants.
3. Physical Blocking: Certain gases can condense or polymerize on the catalyst surface, creating a physical barrier that prevents reactants from reaching the active sites.
