Heterogeneous catalytic reactors undergoing chemical deactivation. Part I: Deactivation kinetics and pellet effectiveness

AIChE Journal ◽  
1982 ◽  
Vol 28 (3) ◽  
pp. 405-410 ◽  
Author(s):  
H. H. Lee ◽  
J. B. Butt
Keyword(s):  
Catalytic Reactors ◽  
Heterogeneous Catalytic ◽  
Deactivation Kinetics

scholarly journals Towards a particle based approach for multiscale modeling of heterogeneous catalytic reactors

2019 ◽  
Vol 198 ◽  
pp. 184-197 ◽  
Author(s):  
A. Sengar ◽  
J.A.M. Kuipers ◽  
R.A. van Santen ◽  
J.T. Padding
Keyword(s):  
Multiscale Modeling ◽  
Catalytic Reactors ◽  
Heterogeneous Catalytic

Combining Distillation and Heterogeneous Catalytic Reactors

2004 ◽  
Vol 82 (2) ◽  
pp. 160-166 ◽  
Author(s):  
J.A. Ojeda Nava ◽  
R. Baur ◽  
R. Krishna
Keyword(s):  
Catalytic Reactors ◽  
Heterogeneous Catalytic

Effect of Inventory Change in a Liquid – Solid Circulating Fluidized Bed (LSCFB)

2017 ◽  
Vol 12 (4) ◽  
Author(s):  
Nirmala Gnanasundaram ◽  
Aswin Venugopal ◽  
Yesaswin Katragadda ◽  
Gokul Ullas
Keyword(s):  
Slip Velocity ◽  
Circulating Fluidized Bed ◽  
Circulation Rate ◽  
Outer Diameter ◽  
Hydrodynamic Properties ◽  
Catalytic Reactors ◽  
Heterogeneous Catalytic ◽  
Drift Flux Model ◽  
Solid Holdup ◽  
Solid Distribution

AbstractCirculating fluidized beds (CFB) play a major role in the chemical industry especially as heterogeneous catalytic reactors. Research on hydrodynamic properties of Liquid – Solid CFBs (LSCFB) is significantly under-reported as compared to Gas – Solid CFBs (GSCFB). Steadily, prominent research is being established in fields like food industry (whey protein recovery), waste management (removal of heavy metals from radioactive wastes) and others, which use LSCFBs. In this context, it is important to have significant knowledge about the changes occurring in hydrodynamic properties like solid hold-up, rate of solid circulation etc., on changing certain critical physical properties such as inventory height. An LSCFB of height 2.95 m and riser outer diameter 0.1 m was chosen and the effect of inventory height on the properties was studied by taking the initial inventory heights as 15 cm, 25 cm and 35 cm. The hydrodynamic studies concentrated on axial solid holdup, average solid holdup, solid circulation rate and slip velocity. On increasing the inventory, uniformity of axial solid holdup was confirmed along with studying holdup patterns. Solid flux was seen to follow an inverse relationship to holdup, as expected. The change in slip velocity with varying inventory was also checked, and was found to decrease with inventory. The distribution parameter, Coof the drift flux model was used to determine the extent of non-uniformity in solid distribution. Cowas calculated to be less than unity in the range of 0.983–0.994, suggesting non-uniformity in solid distribution, with higher solid concentration by the walls compared to the core.

Chemical mapping of chemical conversion in heterogeneous catalytic reactors using MRI

Catalysis ◽  
2008 ◽  
pp. 286-308
Author(s):  
Lynn F. Gladden ◽  
Michael D. Mantle ◽  
Andrew J. Sederman
Keyword(s):  
Chemical Conversion ◽  
Chemical Mapping ◽  
Catalytic Reactors ◽  
Heterogeneous Catalytic
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