Mixing in trickle flow through packed beds

Residence-Time-Distribution Studies on a Gas-Liquid Countercurrent Packed Column with Intermittent Voids along the Axis

“…The Peclet numbers for the packed bed with voids are 1 to 1.5 times those for the conventional packed bed, the largest difference occurring at the lowest water flow rate. The numerical values ranged from 0.11 to 0.65 and are of the same order of magnitude as those calculated from the correlation by Michell and Furzer (1972…”

Residence-Time-Distribution Studies on a Gas-Liquid Countercurrent Packed Column with Intermittent Voids along the Axis

“…The Peclet numbers for the packed bed with voids are 1 to 1.5 times those for the conventional packed bed, the largest difference occurring at the lowest water flow rate. The numerical values ranged from 0.11 to 0.65 and are of the same order of magnitude as those calculated from the correlation by Michell and Furzer (1972…”

Screening of optimal pretreatment and reaction conditions for the isomerization-cracking of long paraffins over Pt/WO3–ZrO2 catalysts

“…With respect to the axial dispersion we have indicated in a previous contribution [48] that conversion values can be decreased by the backmixing in tubular reactors with high values of axial dispersion. This dispersion is predicted by many published correlations [47][48][49][50]. Using the correlation of Michell and Furzer [50] a value of the Péclet number of 2 is obtained at all conditions.…”

“…This dispersion is predicted by many published correlations [47][48][49][50]. Using the correlation of Michell and Furzer [50] a value of the Péclet number of 2 is obtained at all conditions. As a result to eliminate backmixing the length-to-particle diameter ratio should be equal to 50 or higher.…”

Improving the prediction of liquid back‐mixing in trickle‐bed reactors using a neural network approach

“…It appears also that most correlations achieve better results for D AX extracted from the PDE and PDE–TD models instead of the D AX obtained from the PD model. This is shown in Table 6, especially for the Michell and Furzer31 and Hochman and Effron14 correlations.…”

Residence-Time-Distribution Studies on a Gas-Liquid Countercurrent Packed Column with Intermittent Voids along the Axis

“…The Peclet numbers for the packed bed with voids are 1 to 1.5 times those for the conventional packed bed, the largest difference occurring at the lowest water flow rate. The numerical values ranged from 0.11 to 0.65 and are of the same order of magnitude as those calculated from the correlation by Michell and Furzer (1972…”

Screening of optimal pretreatment and reaction conditions for the isomerization-cracking of long paraffins over Pt/WO3–ZrO2 catalysts

“…With respect to the axial dispersion we have indicated in a previous contribution [48] that conversion values can be decreased by the backmixing in tubular reactors with high values of axial dispersion. This dispersion is predicted by many published correlations [47][48][49][50]. Using the correlation of Michell and Furzer [50] a value of the Péclet number of 2 is obtained at all conditions.…”

“…This dispersion is predicted by many published correlations [47][48][49][50]. Using the correlation of Michell and Furzer [50] a value of the Péclet number of 2 is obtained at all conditions. As a result to eliminate backmixing the length-to-particle diameter ratio should be equal to 50 or higher.…”

Improving the prediction of liquid back‐mixing in trickle‐bed reactors using a neural network approach

“…It appears also that most correlations achieve better results for D AX extracted from the PDE and PDE–TD models instead of the D AX obtained from the PD model. This is shown in Table 6, especially for the Michell and Furzer31 and Hochman and Effron14 correlations.…”

Residence-Time-Distribution Studies on a Gas-Liquid Countercurrent Packed Column with Intermittent Voids along the Axis

“…The Peclet numbers for the packed bed with voids are 1 to 1.5 times those for the conventional packed bed, the largest difference occurring at the lowest water flow rate. The numerical values ranged from 0.11 to 0.65 and are of the same order of magnitude as those calculated from the correlation by Michell and Furzer (1972…”

Screening of optimal pretreatment and reaction conditions for the isomerization-cracking of long paraffins over Pt/WO3–ZrO2 catalysts

“…With respect to the axial dispersion we have indicated in a previous contribution [48] that conversion values can be decreased by the backmixing in tubular reactors with high values of axial dispersion. This dispersion is predicted by many published correlations [47][48][49][50]. Using the correlation of Michell and Furzer [50] a value of the Péclet number of 2 is obtained at all conditions.…”

“…This dispersion is predicted by many published correlations [47][48][49][50]. Using the correlation of Michell and Furzer [50] a value of the Péclet number of 2 is obtained at all conditions. As a result to eliminate backmixing the length-to-particle diameter ratio should be equal to 50 or higher.…”

Improving the prediction of liquid back‐mixing in trickle‐bed reactors using a neural network approach

“…It appears also that most correlations achieve better results for D AX extracted from the PDE and PDE–TD models instead of the D AX obtained from the PD model. This is shown in Table 6, especially for the Michell and Furzer31 and Hochman and Effron14 correlations.…”