Well in the Dieselhydrodesulfurization/ hydrotreating process, diesel feed is mixed with recycle Hydrogen over a catalyst bed in a trickle bed reactor.

It is mixed at temperature of 290-400°C and pressure of 35-125 bar.

The main chemical reactions in DHDS/DHDTare hydrodesulphurization(HDS), hydrodenitrification (HDN), and aromatic and olefin saturation.

These reactions are carried on bi-functional catalysts.

Reactor effluent is separated into gas and liquid in a separator. Gas is recycled back to the reactor after


Usefulness

Indigenous Process design& technology

Capable of producing ultra low Sulfur meeting BS-IV diesel specifications

Proprietary Reactor internals.

Competitive with foreign licensors

Proprietary DHDS/DHDT catalyst system so as to offer a complete package.

Design and Engineering experiences of EIL

Commercialization

Grass root unit of 1.2 MMTPA DHDT is commissioned at IOC-BGR in Aug, 2011 for producing diesel meeting BS-IV norms (Sulfur < 50 ppm and Cetane number of more than 51).