A control scheme for packed bed reactors having a changing catalyst activity profile. II: On-line optimizing control

Windes, Larry C.; Ray, W. Harmon

doi:10.1016/0959-1524(92)80016-q

Cited by 20 publications

(6 citation statements)

References 11 publications

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“…Our work on this topic eg. ; [43][44][45][46][47] will continue in the next funding period. There are special procedures necessary to deal with these problems.…”

Section: Ii12 Packed Bed Reactorsmentioning

confidence: 99%

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(New process modeling, design and control strategies for energy efficiency, high product quality and improved productivity in the process industries)

1991

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The results of the research caIried out from June 1989 through December 1991 and supported by the Department of Energy have been reported in a series of research papers, conference presentations, short courses, and seminars. These are listed in detail in section II.4 below. Several additional papers are in preparation. In this renewal proposal, it is impossible to provide a detailed account of ali the numerous developments and results obtained during the last 21/2 years. However, we are providing separately a report including reprints and preprints of ali publications. Thus in what follows, we shall only summarize the highlights of our work to date. ti.1 RESILIENT DESIGN AND CONTROL OF CHEMICAL REACTORS

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“…Our work on this topic eg. ; [43][44][45][46][47] will continue in the next funding period. There are special procedures necessary to deal with these problems.…”

Section: Ii12 Packed Bed Reactorsmentioning

confidence: 99%

“…Simulation results and experiments have been impressive [42][43][44][45][46][47]. The methodology and experience from this study are expected to provide the basis for developing general procedures having application in industry.…”

Section: (Iii) Use Of Customizedmentioning

confidence: 99%

(New process modeling, design and control strategies for energy efficiency, high product quality and improved productivity in the process industries)

1991

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“…This scheme involves state '6stimati6"/F6T":_e_'bed temperature and concentration profiles, periodic reestimation of catalyst activity profiles as the catalyst decays, and yield optimization control. Simulation results and experiments have been impressive [42][43][44][45][46][47]. The methodology and experience from this study are expected to provide the basis for developing general procedures having application in industry.…”

Section: Ii24 Distributed Parameter Systemsmentioning

confidence: 99%

[New process modeling, design and control strategies for energy efficiency, high product quality and improved productivity in the process industries]

1991

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The results of the research caIried out from June 1989 through December 1991 and supported by the Department of Energy have been reported in a series of research papers, conference presentations, short courses, and seminars.These are listed in detail in section II.4 below. Several additional papers are in preparation.In this renewal proposal, it is impossible to provide a detailed account of ali the numerous developments and results obtained during the last 21/2 years. However, we are providing separately a report including reprints and preprints of ali publications.Thus in what follows, we shall only summarize the highlights of our work to date. ti.1 RESILIENT DESIGN AND CONTROL OF CHEMICAL REACTORS

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“…In the advanced control category, Cinar studies state-space controller design for a tubular catalytic reactor. Windes and Ray , apply online optimizing control using distributed parameter state estimation of reactor temperature and concentration profiles. Kozub et al apply internal model controller (IMC) and linear-quadratic (LQ) control to a pilot-scale tubular reactor for the highly exothermic butane hydrogenolysis reaction.…”

Section: Introductionmentioning

confidence: 99%

Case Study on Tubular Reactor Hot-Spot Temperature Control for Throughput Maximization

Singh

Lal

Kaistha

2008

Ind. Eng. Chem. Res.

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Auctioneering hot-spot temperature control of a highly exothermic cooled tubular reactor (constant coolant temperature) for cumene production via the irreversible gas-phase alkylation of benzene with propylene (A + B f C) is studied. Specifically, three control configurations are quantitatively evaluated for tightness of hot-spot temperature control and maximum achievable process throughput with reactor cooling duty as the bottleneck constraint. The configurations manipulate respectively the reactor cooling duty (CS1), the reactor inlet temperature (CS2), and the fresh propylene feed (CS3) for regulating the hot-spot temperature. Plantwide dynamic simulation results show that tightest hot-spot temperature control is achieved by the direct manipulation of the reactor cooling duty (CS1). Use of reactor inlet temperature as the manipulation handle (CS2) is not recommended due to large deviations in the reactor temperature profile for a throughput increase. Manipulating the fresh propylene feed rate (limiting reactant) as in CS3 provides loose but acceptable hot-spot temperature control. CS3 is most preferred for throughput maximization as the reactor is operated at the bottleneck constraint of maximum heat removal capacity. For the sample case study, the maximum achievable throughput increases by more than 7% by use of CS3 (over CS1).

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A control scheme for packed bed reactors having a changing catalyst activity profile. II: On-line optimizing control

Cited by 20 publications

References 11 publications

(New process modeling, design and control strategies for energy efficiency, high product quality and improved productivity in the process industries)

(New process modeling, design and control strategies for energy efficiency, high product quality and improved productivity in the process industries)

[New process modeling, design and control strategies for energy efficiency, high product quality and improved productivity in the process industries]

Case Study on Tubular Reactor Hot-Spot Temperature Control for Throughput Maximization

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