What is the primary purpose of using inert gas in a purge process?

The primary purpose of using inert gas in a purge process is to prevent combustion. Inert gases, such as nitrogen or argon, are typically used to displace oxygen in a system or environment where flammable materials are present. By reducing the concentration of oxygen, the inert gas helps to eliminate the potential for combustion or explosion, as combustion requires a fuel source, an oxidizer (usually oxygen), and an ignition source. This safety measure is particularly critical in processes involving flammable gases or liquids, as it helps to create a non-reactive atmosphere, ensuring safe operations during maintenance, storage, or chemical processing.

Other options relate to different aspects of industrial processes but do not capture the core role of inert gases in the context of preventing fire hazards. Enhancing chemical reactions, improving temperature control, and increasing pressure levels pertain to various chemical engineering practices but are not the main intent of employing inert gases during purging operations.