(c)   Reactor:

• •    Temperature is maintained at 400-1000°C and pressure of about 500 to 3000psi.

•    The residence time is about 1 to 10 minutes.

•    Since reaction is highly exothermic, so cooling jackets are used to control temperature of ...reactor.

•    Catalyst used is 1% tungsten or molybdenum oxide.

•    Catalyst solution is made for reaction.

•    The products from the reactor then pass to cyclone.

•    There will be liquid aromatics along with unreacted coal and hydrogen in stream leaving the ...reactor.

(d)   Cyclone:

• •    Solids as bottom product are removed.

•  ..Hot reaction mixture from the reactor is fed to the cyclone for separation of solids and gases.

•    Gaseous mixture leaving cyclone contain aromatics, unused hydrogen and small amounts of ..light hydrocarbon and carbon dust.

•  •  Temperature of the leaving stream is about 700°C.

 

(e)   Scrub quenching tower:

• •    The gases from cyclone are at very high temperature.

•    Sudden cooling of gases or quenching of gases is done in this tower.

•    Quenching and absorption both are done simultaneously.

•    Water scrub carbon dust from gaseous mixture.

•    Stream leaving mainly contain aromatics, hydrogen and other hydrocarbons.