Optimization of a model IV fluidized catalytic cracking unit
✍ Scribed by Rein Luus; Stephen S. Woo
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 499 KB
- Volume
- 79
- Category
- Article
- ISSN
- 0008-4034
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✦ Synopsis
Abstract
Maximization of a profit function related to a fluidized catalytic cracking unit model was carried out by Luus‐jaakola optimization procedure. A 7‐dimensional search is carried out on a FCC unit described by 113 nonlinear algebraic equations and 9 differential equations. Despite the low sensitivity and the existence of several local optima, the global optimum was obtained with reasonable amount of computational effort. At the optimum, the profit function is 1% higher than when the air blowers are constrained to operate at their maximum capacity.
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A Multivariable Model Predictive Controller (MVPC) is applied at the coordinating control level. The design and application of the MVPC is introduced and demonstrated. A well structured, first principle dynamic model was developed for the regenerator/reactor section of a FCC plant. The control exper
A mathematical model for flmd catalytrc crackmg umts IS developed The model takes mto account the krnetlcs of the crackmg reactions, as well as the kmetics of coke combustion m the regenerator A model equations It 1s found that multrphcity of the steady states extends over a wide scope of operatrng
## Abstract Bench‐ and laboratory‐scale reactors are required to infer kinetic data for catalytic cracking units. One of the most common methods is the microactivity test (MAT, ASTM D‐3902–92), that emulates the catalyst‐to‐oil ratio using a fixed‐bed reactor and a semibatch accumulator of liquids.