A reactive distillation process for deep hydrodesulfurization of diesel

A systematic study of the operating conditions and parameter sensibility under which multiple steady states may occur in a reactive distillation column(RDC) for diesel deep hydrodesulfurization is presented.The multiplicity analysis is performed through bifurcation diagrams for two feed case scenarios. Themain variables that affect the steady state behavior are the reflux ratio, the hydrocarbon feed flowrate,the reboiler heat duty, and the catalystload (liquid holdup). For the first case only a single steady statewas found, while in the second case input and output multiplicities were determined. It isshown that the introduction in the feed of the recalcitrant 4,6-DMDBT, plays a crucial role in the RDC design and operation. A set of values of thebifurcation parameters for an appropriate operation of the RDC are recommended to avoid the multiplicity region and to reach the required output targets.

کلیدواژه ها:

Diesel deep HDS ، Multiple steady states ، Reactive distillation