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

1992 ◽  
Vol 2 (1) ◽  
pp. 43-53 ◽  
Author(s):  
Larry C. Windes ◽  
W.Harmon Ray
Keyword(s):  
Catalyst Activity ◽  
Packed Bed ◽  
Activity Profile ◽  
Packed Bed Reactors ◽  
Control Scheme ◽  
On Line ◽  
Optimizing Control

Temperature excursions in packed bed reactors with an axial variation of catalyst activity

2001 ◽  
Vol 69 (1-4) ◽  
pp. 137-146 ◽  
Author(s):  
Attasak Jaree ◽  
Hector Budman ◽  
Robert R. Hudgins ◽  
Peter L. Silveston ◽  
Vladimir Yakhnin ◽  
...  
Keyword(s):  
Catalyst Activity ◽  
Packed Bed ◽  
Packed Bed Reactors ◽  
Axial Variation

On-line optimizing control of a packed-bed immobilized-cell reactor

AIChE Journal ◽  
1988 ◽  
Vol 34 (4) ◽  
pp. 626-632 ◽  
Author(s):  
John W. Hamer ◽  
Carl B. Richenberg
Keyword(s):  
Packed Bed ◽  
Immobilized Cell ◽  
Immobilized Cell Reactor ◽  
On Line ◽  
Cell Reactor ◽  
Optimizing Control

An experimental dynamic method of investigation of counter-current absorption of oxygen in water in a packed bed column

1987 ◽  
Vol 52 (7) ◽  
pp. 1715-1729 ◽  
Author(s):  
Pavel Moravec ◽  
Vladimír Staněk
Keyword(s):  
Transfer Functions ◽  
Simultaneous Detection ◽  
Harmonic Component ◽  
Packed Bed ◽  
Packed Bed Column ◽  
Oxygen Electrodes ◽  
Simultaneous Evaluation ◽  
Physical Absorption ◽  
On Line ◽  
Counter Current

An experimental method and technique are described in the paper of simultaneous detection of the transfer functions outlet-gas-stream-to-inlet-gas-stream and outlet-liquid-stream-to-inlet-gas-stream for the absorption of oxygen into water in a counter-current packed bed column. Both transfer functions were simultaneously monitored by means of three oxygen electrodes operating on the polarographic principle. The signals of these electrodes were processed in three steps to yield parameters of the model of physical absorption of gas. The first step was on-line evaluation of the Fourier coefficients of the principal harmonic component in all three monitored streams. The second step was the calculation of the frequency characteristics of both transfer functions while the third step yielded parameters of the model by optimization in the frequency domain. The method permits simultaneous evaluation of the parameters of the flow of both phases in the column and the interfacial transfer of oxygen.

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