scholarly journals Numerical investigation of mechanical axial dispersion in slender fixed‐beds

AIChE Journal ◽  
2021 ◽  
Author(s):  
Nico Jurtz ◽  
Tobias David Schönherr ◽  
Matthias Kraume
Keyword(s):  
Numerical Investigation ◽  
Axial Dispersion ◽  
Fixed Beds

Sorption dynamics in fixed-beds of inert core spherical adsorbents including axial dispersion and Langmuir isotherm

AIChE Journal ◽  
2009 ◽  
Vol 55 (7) ◽  
pp. 1784-1792 ◽  
Author(s):  
M. Khosravi Koocheksarayi ◽  
K. Shams ◽  
Y. Z. Liu
Keyword(s):  
Langmuir Isotherm ◽  
Axial Dispersion ◽  
Sorption Dynamics ◽  
Inert Core ◽  
Fixed Beds

Shock layer analysis of adiabatic adsorption in fixed beds with axial dispersion

1982 ◽  
Vol 23 (2) ◽  
pp. 167-176 ◽  
Author(s):  
Hyun-Ku Rhee ◽  
Neal R. Amundson ◽  
Richard P. Lewis
Keyword(s):  
Shock Layer ◽  
Axial Dispersion ◽  
Layer Analysis ◽  
Fixed Beds

Axial dispersion of mass in flow through fixed beds

AIChE Journal ◽  
1958 ◽  
Vol 4 (3) ◽  
pp. 367-375 ◽  
Author(s):  
J. J. Carberry ◽  
R. H. Bretton
Keyword(s):  
Axial Dispersion ◽  
Flow Through ◽  
Fixed Beds

Fifty Years of Moment Technique for Dynamic Analysis of Chemical Reactor Parameters

2019 ◽  
Vol 17 (5) ◽  
Author(s):  
Gülşen Doğu ◽  
Timur Doğu
Keyword(s):  
Dynamic Analysis ◽  
Reaction Rate ◽  
Chemical Reactor ◽  
Axial Dispersion ◽  
Moment Analysis ◽  
Transport Parameters ◽  
Transfer Coefficients ◽  
Engineering Research ◽  
Single Pellet ◽  
Fixed Beds

Abstract Moment technique has been extensively used for the evaluation of the rate and equilibrium parameters in chemical reactors and also in adsorption vessels, for about five decades. Adsorption and reaction rate parameters, as well as axial dispersion constants, effective diffusivities within porous catalysts and heat and mass transfer coefficients were shown to be effectively evaluated by analyzing the moments of the response peaks, which could be obtained from pulse-response experiments performed in a reaction/adsorption vessel. A detailed review of chromatographic processes, involving moment analysis of adsorption equilibrium and rate constants in fixed beds, dynamic analysis of batch adsorbers, moment analysis of fluidized bed, slurry and trickle bed reactors are reported in this manuscript. Applications of the single-pellet moment technique, which was developed for the effective investigation of intrapellet rate and equilibrium processes, by eliminating the contributions of axial dispersion and external transport parameters, are comprehensively discussed. Recent studies for the analysis of reaction rate parameters using the TAP reactor approach, use of single pellet system for the investigation of catalytic and non-catalytic solid-gas reactions and extension of the moment technique to non-linear systems opened new pathways in reaction engineering research.

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