CATEGORY: REACTORS
International Journal of Engineering Research
and Applications, Vol. 2, Issue 6, November- December 2012, pp.557-568
Six-lump
kinetic modelling of adiabatic plug-flow riser-reactor in an industrial FCC
unit
K. K. Dagde* and Y. T. Puyate**
*(Department of Chemical/ Petrochemical Engineering, Rivers State University of
Science and Technology, Port Harcourt, Nigeria,)
**(Department of Chemical/ Petrochemical Engineering, Rivers State University
of Science and Technology, Port Harcourt, Nigeria,)
Abstract
A
six-lump kinetic model is presented that describes the catalytic cracking
reactions taking place in an industrial riser-reactor. In this scheme, C3’s
(propane and propylene gases) and C4’s (butane and butylenes gases) components
of liquefied petroleum gas are predicted independently, as well as gasoline,
dry gas, and coke.
The riser-reactor is modelled as a plug-flow reactor operating
adiabatically. Model-predicted yields of gasoline, C3’s, C4’s, fuel gas, coke,
and riser-reactor outlet-temperature, agree reasonably well with plant data
obtained from an operating industrial riser-reactor. Sensitivity analysis
carried out on the riser-reactor indicates that inlet-temperature of gas-oil
(feed), catalyst-to-gas oil ratio, and mass flowrate of gas-oil, are important
process variables that affect the operation of the riser-reactor. It is shown
that the minimum catalyst-to-gas oil ratio required for maximum conversion of
gas-oil is 3. Simulation results using catalyst-to-gas oil ratio of 6.5,
inlet-temperature of gas-oil of 505K, and mass flowrate of gas-oil of 67.8
kg/s, give yields of 45.81% gasoline, 6.32% C3’s, 10.68% C4’s, 5.42% fuel gas,
5.11% coke, and 26.66% of unconverted gas-oil.
Free Full Text Source: http://www.ijera.com/papers/Vol2_issue6/CD26557568.pdf
No comments:
Post a Comment