| − | Thermal cracking is a refining process in which heat and pressure are used to break down, rearrange, or combine hydrocarbon molecules. Thermal-cracking includes gas oil, visbreaking, fluid coking, delayed coking, and other thermal cracking processes (e.g., flexicoking). | + | '''Thermal cracking''' is a refining process in which [[heat]] and [[pressure]] are used to break down, rearrange, or combine hydrocarbon [[molecules]]. Thermal-cracking includes gas [[oil]], visbreaking, fluid coking, delayed coking, and other thermal cracking processes (e.g., flexicoking). |