ABSTRACT
A feedstock is raw material for a processing or manufacturing and which is an asset that is critical to the production of other products. This chapter presents the methods by which various gaseous and liquid feedstocks can be processed and prepared for petrochemical production. Additional gases are produced in thermal cracking processes, such as the coking or visbreaking processes for the processing of heavy feedstocks. The composition of the process gas varies in accordance with reforming severity and reformer feedstock. There is a series of alternate processes that involve the use of chemical reactions to remove contaminants from gas streams or the use of specialized equipment to physically remove contaminants from gas streams. Thermal cracking is the oldest and in principle the simplest refinery conversion process. The temperature and pressure depends on the type of feedstock and the product requirements as well as the residence time. The feedstock is fed into a fluidized bed and the feedstock flashes and vaporizes.
