Processes fuel alkylation process chemistry

At sufficiently low temperatures, alkyl radicals produced by H atom abstraction from the fuel react primarily by addition to molecular oxygen via reaction (1) to produce alkylperoxy radicals. The subsequent sequence of reactions has a great wealth of kinetic and thermochemical detail, some of which will be discussed below. However, the overall process includes reactions which lead to chain branching and other sequences which lead only to chain propagation. A careful and detailed understanding and kinetic description of the rates of these different reaction paths is required to be able to interpret and predict the response of laboratory and applied combustion chemistry problems. 

The physical basis for this S5mergism in process application is based in the chemistry of the alkylated aromatic thiophenic compounds in diesel fuel feedstock those most resisitant to conversion to hydrocarbons by HDS are those most readily amenable to oxidation and extractive desulfurization. Refiners expanding their processing capacity or adjusting to the new ULSD rule may want to consider the new extractive desulfurization (EDS) alternatives to high severity HDS, including debottelnecking HDS units by feedstock pretreatment or post-treatment, or parallel operation to reduce the load on their units. 

---