ABSTRACT
This chapter attempts to study the parameters which influence hydrotreatment as variables used to yield diesel specifications. Special attention is paid to catalyst selection according to its surface composition and the objectives. Since worldwide conversion processes are used to upgrade heavy oil to distillates, the hydrotreatment of light gas oil (LGO) as a downstream process has been used more extensively. This fractio is produced from thermal or catalytic cracking or hydrocracking processes. Generally, the foremost consideration when a hydrotreatment improvement must be considered is the selection of the best catalyst for particular applications. The hydrogenation of a cycle diesel oil in order to achieve the Cetane Index specifications is, in general, expensive. In order to optimize the operating conditions of the hydrotreatment of cracked light gas oil to satisfy a particular market scenario, several parameters have to be adjusted and many features have to be considered.
