![]() View specific units to learn more about our process. Refinery – Chemicals designed for refiners to safely increase efficiency faster with less waste, and at a lower cost.This entry was posted in Week 07 by Jay Chin Yen. Therefore, it is not exclusively used, and refineries typically operate with both processes in order to produce the most desirable yield of products. The evolution of the catalytic cracking (from Houdry to Thermafor to the modern fluid catalytic cracking) has continuously improved upon the thermal efficiencies of the process.Īlthough the hydrocracking process has several advantages over fluid catalytic cracking, hydrocracking is, in comparison, a more costly process. The heat for catalytic cracking is supplied by the regeneration of catalysts. fixed bed, ebullated bed, or expanded bed), catalysts, and hydrogen/carbon ratios, hydrocracking can be highly flexible, with the ability to process both relatively light feedstock as well as heavy vacuum residue into light and middle distillates.Īnother difference between hydrocracking and catalytic cracking includes the change in enthalpy while catalytic cracking is an endothermic process, hydrocracking is an exothermic process. Furthermore, by modifying reactor configurations (e.g. But due to the fact that aromatic rings cannot be cracked until they are fully saturated with hydrogen, the hydrocracking process allows for the processing of more aromatic feedstock, including the byproducts of catalytic cracking (e.g. The primary objective of both cracking processes is to produce lighter saturated hydrocarbons with reduced molecular weights and boiling points from heavy oils. The advantages of hydrocracking include its ability to handle a wide range of feedstock, as well as the selectivity of its distillates. Several factors distinguish these two cracking processes however, typically both processes are used in order to provide the most optimal yield of products in an economically efficient manner. Therefore, some complications from coking are avoided during the hydrocracking process. Additionally, while catalytic cracking is a carbon rejection process, hydrocracking is in a hydrogen addition process. The process is typically accompanied by hydrotreating in order to remove heteroatom species (e.g. Pt and Pd) used in hydrocracking are very susceptible to poisoning and great care must be taken to remove sulfur from the feedstock. The catalysts (highly active noble metals used for hydrogenation e.g. Therefore, hydrocracking utilizes a bifunctional catalyst. Hydrocracking is essentially the combination of two processes: hydrogenation and cracking. ![]()
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