CATEGORY: FCCU – FLUID CATALYTIC CRACKING UNIT
International Journal of Emerging trends in
Engineering and Development, Issue 2, Vol.3 (April-2012)
Modelling
and Optimization of Fluid Catalytic Cracking Unit (FCCU) Using Hysys
Olabode Yusuf Raji*, Usman Aliyu El-Nafaty, Mohammed Jibril, Baba
Yahya Danjuma
bode2000eh@gmail.com
elnafaty@yahoo.com
jibrilmuhammad@yahoo.com
ydbdanjuma@yahoo.com
Chemical Engineering Programme, Abubakar Tafawa Balewa University, Bauchi, P.
M. B. 0248, Bauchi-Nigeria
ABSTRACT
The
aim of this study is to obtain a computer based model that can simulate and
optimize the performance of an existing industrial fluid catalytic cracking
(FCC) unit in steady state. The objective of this unit is to convert residues
into high added value products (Fuel gas and Gasoline).
The cracking reactions in the riser reactor occur in a transported
bed with the fluid (nC25) and the solids catalyst (Magnesiev-370) in
regenerator flow under operating conditions. One of the main advantages of this
model is that it uses HYSYS software that is robust, flexible and versatile.
This model is particularly suitable for control studies that facilitate good
performance of FCC. To simulate the FCC, the model was based on these products:
gas oil, flue gas, gasoline (C5+) and bottom oil and thus has been developed
based on operational data of FCC. The simulation studies were performed to
optimize the unit by manipulating various process variables such as the molar
flow rate of recycle bottom oil and reflux ratio, which were subject to
constraint Reid Vapor Pressure (RVP) of gasoline. The objective function was to
maximize net profit of the desired products. The net profit calculation was
done successfully upon applying the Sequential Quadratic Programming (SQP)
method to optimize the process, the results show tremendous improvement from
N21.521Trillion to N25.214 Trillion, about 17.16% increase and reflux ratio
showed an inverse proportionality with respect to net profit while both desired
products showed good performance outputs.
Free Full Text Source: http://rspublication.com/ijeted/ijeted%20april%2012/1.pdf
No comments:
Post a Comment