Steady state multiplicity in an UOP FCC unit with high-efficiency regenerator

Fernandes, Jean Lucas Macedo; Pinheiro, Carla I.C.; Oliveira, Nuno M.C.; Neto, Ana I.; Ribeiro, F. Ramôa

doi:10.1016/j.ces.2007.07.033

Cited by 28 publications

(32 citation statements)

References 20 publications

(59 reference statements)

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“…On the other hand, CCR only affects positions of heat generation curves. These results of the TSRFCP process are consistent with those studies on conventional FCC units (Fernandes et al, 2007). Of course, other uncertainties such as pyrolysis enthalpy can also be investigated following the similar route.…”

Section: Influences Of Uncertainties On Output Multiplicitiessupporting

confidence: 89%

“…When there is only one, it would be the cold steady state and is of no industrial interest. These results are different from previous investigations on conventional FCC units (Arbel et al, 1995;Fernandes et al, 2007). In those contributions, changing certain operation conditions may generate more than three steady states.…”

Section: Influence Of Operation Conditions On Output Multiplicitiescontrasting

confidence: 82%

“…The results from Hernandez- Barajas et al (2006), which claimed that the number of steady states in FCC units was independent of operating conditions, were conflict with Arbel's conclusions (Arbel et al, 1995). Previous works demonstrated that high-efficiency regenerator exhibited a behavior similar with a plug-flow reactor rather than a CSTR and did not show any output multiplicities (Fernandes et al, 2007). Only incorporate the high-efficiency regenerator with an external cooler, can it show output multiplicities.…”

Section: Literature Surveymentioning

confidence: 51%

“…More recently, the existence of output and input multiple steady states in a UOP FCC unit with a high-efficiency regenerator were studied (Fernandes et al, 2007). In this work, effects of unit disturbances and model uncertainties, such as coke composition and cracking enthalpy, on output multiplicity were investigated.…”

Section: Literature Surveymentioning

confidence: 99%

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Steady-state multiplicity analysis of two-stage-riser catalytic pyrolysis processes

Yuan

Wang

Yang

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Computers & Chemical Engineering

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Section: Influences Of Uncertainties On Output Multiplicitiessupporting

confidence: 89%

Section: Influence Of Operation Conditions On Output Multiplicitiescontrasting

confidence: 82%

Section: Literature Surveymentioning

confidence: 51%

Section: Literature Surveymentioning

confidence: 99%

See 2 more Smart Citations

Steady-state multiplicity analysis of two-stage-riser catalytic pyrolysis processes

Yuan

Wang

Yang

2015

Computers & Chemical Engineering

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“…To simulate the industrial unit a model for the reactor-regenerator system of an UOP FCC unit with a high-efficiency regenerator previously developed by Fernandes et al [5][6][7] is used. The model was derived from fundamental principles.…”

Section: Closed-loop Dynamic Behavior Of An Industrialmentioning

confidence: 99%

Closed-loop dynamic behavior of an industrial high-efficiency FCC unit

Fernandes

Pinheiro

Oliveira

et al. 2008

2008 16th Mediterranean Conference on Control and Automation

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Although the control of an FCC plant includes all the hardware components of the process, it is at the FCC reactor-regenerator system that the control is the most critical. This is mainly due to the strong interaction between the reactor and regenerator units. As a result, the reactor-regenerator system presents a highly nonlinear behavior and is therefore a challenge for control tasks. This paper presents a brief introduction to the control of a high-efficiency FCC unit and the implementation of the main regulatory control loops in the reactor-regenerator system of a real Portuguese industrial highefficiency FCC unit. Moreover, closed-loop dynamic simulations performed with a model previously developed by the same authors, are compared to industrial dynamic data from step tests done in GalpEnergia FCC unit showing that this FCC simulator can realistically represent the closed-loop dynamic behavior of a real industrial operating unit. Therefore, this dynamic model has a great potential to be used as a reference model for advanced model-based control and real-time optimization purposes.

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