Maximisation of LPG Yield in FCC Units |
|
|
IndianOil's Research and Development Centre widely recognized as a centre
of excellence in petroleum technology has developed considerable expertise in
enhancing the LPG yield by process optimization, catalyst selection and
revamp of FCC units. Being a pioneer in the world to evaluate the ZSM-5
additive for distillate mode FCC units and subsequent plant trials in many
Indian FCC units, IndianOil has valuable knowledge to share with our
customers to maximize LPG yield. Significant improvement in the yield of LPG
and propylene is possible by adding ZSM-5 additive in the system even at
low concentration (< 0.5%). Scoping studies conducted by IndianOil R&D
Centre at Indian FCC units indicated an increase in the yield of LPG from
10-20% to 25-35 wt % of feed and propylene from 4.5 to 12 wt % of feed.
|
|
LPG Maximization in FCC/RFCC can be achieved by :
|
| » |
Adapting a suitable catalyst additive |
| » |
Selecting a base catalyst that helps higher LPG yield |
| » |
Optimizing the unit severity by de-bottlenecking the unit
limitations for enhancing the catalyst circulation |
| » |
Adopting appropriate measures to minimize dry gas formation
and to generate cushion in the unit |
| » |
Optimize process conditions |
|
Backed by a strong R&D with state of the art
facilities for characterisation and performance evaluation of FCC catalysts
and additives, IndianOil R&D Centre is well equipped to give precise
solutions to our customers' requirement. The important facilities
available with us are :
|
| » |
Automated MAT Units |
| » |
FCC Pilot Plants |
| » |
Steaming Units |
| » |
Characterization equipment include ABD,
PSD, SA, PV, TA/TGA, TPD, RGA, SDA, PNA Octane Analyzer etc. |
| » |
Kinetics based FCC Process Simulation Model FCCMOD. |
|
The FCC process simulation model (FCCMOD) is used for
performance prediction of FCC catalyst and additives, based on micro
reactor data generated for new feed or catalyst. This simulator is very
useful in performing various scoping studies for increasing the LPG yield.
The model is also useful for verifying the design adequacy of the major
equipment in the unit.
|
| » |
Maximization of LPG yield without any major revamp in the RFCC unit |
| » |
Maximization of LPG with wet gas
compressor capacity augmentation. A typical study for a 0.7 MMTPA,
RFCC unit shows that LPG yield can be increased from current level of
10-20 wt% to 25 - 35 wt% of feed
|
| » |
IndianOil provides necessary technology for major revamp of FCC units with additional throughput increase along with the maximization of
LPG or to fulfill other common objective of a normal revamp. |
| » |
One RFCC unit of IndianOil having cushion in WGC was considered
or LPG maximisation study. |
| » |
Required no revamp.
|
| » |
Following benefits obtained without any investment.
|
| Case : LPG Maximisation in
IndianOil Refinery
|
| Yield, wt% |
Incremental Shift |
|
Plant |
R & D Prediction |
| DG |
+0.43 |
+0.37 |
| LPG |
+4.62 |
+4.39 |
| Gasoline |
-2.58 |
-3.39 |
| TCO |
-1.20 |
-0.29 |
| CLO |
-1.15 |
-1.08 |
| Coke |
-0.13 |
0.00 |
| » |
Performing microreactor
studies with FCC feed streams and catalyst plus ZSM-5 additive at
different concentration levels. Use of FCC simulator will be made to
predict the plant performance at different ZSM-5 concentrations. |
| » |
Conducting scoping study of the
project including the optimization of process parameters and catalyst
selection. Design adequacy of the reactor regenerator section,
fractionator and gas concentration section will also be verified. |
| » |
Performing optimization studies for
generating additional cushion in wet gas compressor and air blower. |
| » |
Preparing a revamp proposal including the cost
estimate for establishing techno-economic feasibility of the project. |
| » |
Preparing design packages and project execution. |
| |
