Thermal Parameter Sensitivity in the Simulation of the Non-Isothermal, Non-Adiabatic Fixed Bed Catalytic Reactor—the Two-Dimensional Heterogeneous Model

Odendaal, W.G.; Gobie, William A.; Carberry, James J.

doi:10.1080/00986448708911959

Cited by 14 publications

(6 citation statements)

References 23 publications

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“…The solid temperature increases about 0.5 K through the bed and the inlet solid temperature is about 4.5 K above the no reaction temperature. The calculated most likely solid temperature goes through a slight maximum, and its derivative a t the outlet is close to zero, It is reassuring that the experimentally-based profile supports the corresponding result (or assumption) found commonly in heterogeneous reactor modeling (Khanna and Seinfeld, 1987;Odendaal et al, 1987). The calculated profile indicates an average solid temperature rise of 4.9 K above the no reaction base temperature.…”

Section: Resultssupporting

confidence: 77%

Magnetic determination of axial catalyst temperature profiles

Cale

Merson

1989

AIChE Journal

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A magnetic thermometric method is used to determine cross-sectional average axial catalyst temperature profiles for superparamagnetic nickel catalyst beds during ethane hydrogenolysis, an exothermic reaction. Each solid temperature profile is determined from an axial profile of cross-sectional average magnetization and is represented by a polynomial. In turn, each magnetization profile is determined from voltage data obtained as the bed is moved through an AC permeameter. A Fredholm equation of the first kind, "regularized" using a minimum variance constraint, is inverted to determine the magnetization profile.The determination of the axial temperature profile for a reactor operating at 11.0% conversion is detailed. It provides a good test of the method used. Some limitations of the method are highlighted by attempts to analyze data from a reactor operating at complete conversion. The potential for model parameter estimation is discussed.

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Section: Resultssupporting

confidence: 77%

Magnetic determination of axial catalyst temperature profiles

Cale

Merson

1989

AIChE Journal

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“…Lately, there i s a tendency in literature to use more elaborate models when modeling gas-solid packed bed reactors. There is a shift from the steady-state, pseudo-homogeneous, oneand two-dimensional models toward the dynamic, heterogeneous two-dimensional model (see Khanna and Seinfeld, 1987;Odendaal et al, 1987;Gatica et al, 1989;Windes et al, 1989a, b) .…”

mentioning

confidence: 99%

Influence of tube and particle diameter on heat transport in packed beds

Borkink

Westerterp

1992

AIChE Journal

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“…If these profiles are carefully analyzed, a welldefined temperature maximum (hot spot) located in the front part of the bed (total length 280 cm) can be observed. In fact, the temperature of the catalyst pellets is higher by about several degrees than the measured one (Odendaal et al, 1987;Arnold and Sundaresan, 1987). According to this character of the temperature profiles, it can be concluded that the reactions are practically completed in the first 100-120 cm of the fixed bed.…”

Section: Resultsmentioning

confidence: 68%

“…These temperatures are measured experimentally and are interstitial with respect to the temperatures of the catalyst and the gas. In fact, the temperature of the catalyst pellets is higher by about several degrees than the measured one (Odendaal et al, 1987;Arnold and Sundaresan, 1987). This means that the real temperature of the catalyst in the hot spot during the first 3-5 days of its life is near the maximum admissible temperature 500 °C but does not exceed this value.…”

Section: Resultsmentioning

confidence: 73%