Design & Cost Estimation of Ethylene Production Unit From Naphta

Ethylene is widely used in chemical industry and its worldwide production(over 109 million tonnes in 2006) exceeds that of any other organic compound. Commercially ethylene is obtained by(1)thermal cracking of hydrocarbons such as ethane propane butane naphtha kerosene gasoil crude oiletc(2) auto thermic cracking (partial oxidation) of the above hydrocarbons(3)recovery from refinery off-gas(4) recovery from coke-oven gas and(5) catalytic dehydration of ethyl alcohol or ethyl ether. The thermal cracking process is the most interesting process to produce ethylene commercially .At this project production of ethylene from naphtha is studied. Naphtha an important feedstock for ethylene production is a collective of liquid hydrocarbon intermediate oil refining products. It is a mixture of hydrocarbons in the boiling point range of 30-200ºC. it is fed to the naphtha cracking furnace. Then the cracked gas is fed to gasoline fractionator where it separates the quench oil as a bottom and the cracked gasoline and lighter components as the overhead products. Then the overhead products are separated in different column.