Abstract:
Light naphtha produced from the fractionation of crude oil is usually cracked to
produce light olefins (Ethene, propene, Butene etc.). The demand for olefins
particularly propylene is increasing day by day. This report involves the details
for the production of olefins and it also deals with the problems of secondary
cracking and coking. Coking is hazardous for the furnace as well as the
proceeding equipment.
Prior art techniques use steam cracking for this purpose. The steam cracking
requires a high temperature of 850ºC.This report focuses on the use of novel
catalytic cracking of naphtha which requires a lower temperature of 650ºC and
also deals with the coking problem in a very efficient way by deriving energy
from the combustion of the produced coke in a simultaneous regeneration system
of Fluid Catalytic Cracker.
The front end de-propanizer scheme used for the recovery of fractions lowers the
requirement of pressure by inducing three instead of four compressors.
The Propylene to Ethylene ratios of the catalytic cracking technique is higher
than that obtained from steam cracking, which is boon for the economics of the
project, as Propylene has comparatively greater demand and a more stable market
than ethylene.
