Numerical simulation of the liquid distribution in a trickle-bed reactor

2012 ◽  
Vol 76 ◽  
pp. 49-57 ◽  
Author(s):  
M. Martínez ◽  
J. Pallares ◽  
J. López ◽  
A. López ◽  
F. Albertos ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Liquid Distribution ◽  
Trickle Bed Reactor ◽  
Trickle Bed

RADIAL LIQUID DISTRIBUTION IN A TRICKLE BED REACTOR

1987 ◽  
Vol 60 (1-6) ◽  
pp. 243-252 ◽  
Author(s):  
M. BORDA ◽  
J.F. GABITTO ◽  
N.O. LEMCOFF
Keyword(s):  
Liquid Distribution ◽  
Trickle Bed Reactor ◽  
Trickle Bed

scholarly journals Liquid Distribution in Trickle-Bed Reactor

2000 ◽  
Vol 55 (4) ◽  
pp. 407-415 ◽  
Author(s):  
C. Marcandelli ◽  
A. S. Lamine ◽  
J. R. Bernard ◽  
G. Wild
Keyword(s):  
Liquid Distribution ◽  
Trickle Bed Reactor ◽  
Trickle Bed

scholarly journals Flow Study and Wetting Efficiency of a Perforated-Plate Tray Distributor in a Trickle Bed Reactor

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Damian Enrique Ramajo ◽  
Santiago Marquez Damian ◽  
Marcela Raviculé ◽  
Maria M. Monsalvo ◽  
Mario Storti ◽  
...  
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Perforated Plate ◽  
Operating Conditions ◽  
Liquid Volume ◽  
Liquid Distribution ◽  
Trickle Bed Reactor ◽  
Ceramic Ball ◽  
Trickle Bed

In this work, a computational fluid dynamics analysis (CFD) employing the Eulerian two-fluid model was carried out with the aim to understand the distribution process and to determine the wetting efficiency of the primary tray distributor (perforated plate) of a trickle bed reactor (TBR) under several operating conditions. The overall inlet geometry was considered, and the small holes of the perforated plate were modeled by sinks (drains) and sources, employing CFD and experimental models to obtain the hole discharge flow coefficients. The influence of the ceramic-ball bed above the catalyst bed was considered by a suitable correlation to estimate liquid distribution inside it.Results showed that because of the scarce liquid sloshing above the tray, little difference on liquid flow rate through the tray holes was found. Due to the really low inlet mass flow rate of gas, it has negligible influence on liquid behavior, which drops through holes slowly without spraying. Thus, the ceramic-ball bed above the catalyst bed is exclusively wetted in a small area under the tray holes. Although the ceramic-ball bed improves liquid distribution, which guarantees a minimum liquid volume fraction at all places, significant differences on the liquid mass flow rate across the top of the catalyst bed were found. Additional causes of low efficiency in TBR like the well-known fouling vulnerability of perforated-plate trays and unevenness were analyzed. For the first, two simple modifications were proposed to improve tray performance: reducing the amount of gas chimneys to only one and adding additional drip points and replacing the tray holes by short risers in order to avoid plugging.

scholarly journals Bed structure and its impact on liquid distribution in a trickle bed reactor

2021 ◽  
Author(s):  
Akarsha Srivastava ◽  
Krishna Nigam ◽  
Shantanu Roy
Keyword(s):  
Gas Flow ◽  
Flow Characteristics ◽  
Two Phase ◽  
Liquid Distribution ◽  
Trickle Bed Reactor ◽  
Catalytic Sites ◽  
Void Structure ◽  
Liquid Distributor ◽  
Trickle Bed ◽  
Catalyst Pellets

The work reported in this investigation involves the determination of the hydrodynamic properties of the Trickle Bed Reactor which has been loaded in various ways to mark the effect of the loading methodologies employed to pack the catalyst pellets. The bed structure of a packed three-phase reactor is critical to study as it provides the essential contact between the phases and provides the catalytic sites where the reaction takes place. Depending on the structural properties of the bed such as local void structure, liquid distribution, two-phase pressure drop, and holdup of fluids gets affected. The study aims to envelop the catalyst bed characteristics such as the local void structure, the length of the catalyst bed, flow characteristics such as liquid and gas flow rate, and liquid distributor at the top of the catalyst bed to gauge and quantify their effect on the hydrodynamics of a trickle bed reactor.

Wall flow in trickle bed reactor

1975 ◽  
Vol 40 (10) ◽  
pp. 3145-3152 ◽  
Author(s):  
J. Prchlík ◽  
J. Soukup ◽  
V. Zapletal ◽  
V. Růžička ◽  
P. Kovařík
Keyword(s):  
Trickle Bed Reactor ◽  
Wall Flow ◽  
Trickle Bed

Mass Transfer Limited Wet Oxidation in Trickle-Bed Reactor

1998 ◽  
Vol 63 (11) ◽  
pp. 1938-1944 ◽  
Author(s):  
Vratislav Tukač ◽  
Jiří Vokál ◽  
Jiří Hanika
Keyword(s):  
Supported Catalyst ◽  
Reaction Rates ◽  
Gas Transfer ◽  
Wet Oxidation ◽  
Reactor Performance ◽  
Catalytic Wet Oxidation ◽  
Environmental Application ◽  
Trickle Bed Reactor ◽  
Fine Glass ◽  
Trickle Bed

Catalytic activity of CuO-supported catalyst in phenol oxidation, and the influence of reaction conditions, viz. temperature (125-170 °C), oxygen partial pressure (1-7 MPa) and liquid feed (30-760 ml h-1), in the continuous operation using 17.9 mm i.d. trickle-bed reactor is presented. The hydrodynamic impact on the three-phase trickle-bed reactor performance in an environmental application of catalytic wet oxidation was also investigated. The results of trickle-bed operation were strongly influenced by wetting efficiency. An insufficient catalyst wetting can be to compensated by filling the catalyst bed voids by fine glass spheres. In the case of the gas transfer limited reaction, a better wetting of the catalyst can lead to worse reactor performance due to lower reaction rates.

scholarly journals Selecting carrier material for efficient biomethanation of industrial biogas-CO2 in a trickle-bed reactor

2021 ◽  
Vol 51 ◽  
pp. 101611
Author(s):  
Mads Borgbjerg Jensen ◽  
Súsanna Poulsen ◽  
Bjarke Jensen ◽  
Anders Feilberg ◽  
Michael Vedel Wegener Kofoed
Keyword(s):  
Trickle Bed Reactor ◽  
Carrier Material ◽  
Trickle Bed
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