Reforming is a process used in the petroleum refining industry to convert low-octane naphthas into high-octane gasoline blending components. The process involves breaking down large hydrocarbon molecules into smaller ones, rearranging their molecular structure, and then combining them to form higher-octane molecules. This is typically achieved through the use of a catalyst, such as platinum or rhenium, and high temperatures and pressures. There are two types of reforming processes: catalytic reforming and thermal reforming. Catalytic reforming is the most commonly used process and involves the use of a catalyst to promote the desired chemical reactions. Thermal reforming, on the other hand, does not use a catalyst and relies on high temperatures to break down the hydrocarbons. Reforming is an important process in the refining industry as it helps to produce high-octane gasoline that meets the requirements of modern engines. The process also produces hydrogen as a byproduct, which is used in other refining processes such as hydrotreating and hydrocracking.