Double-slit model for partially wetted trickle flow hydrodynamics
Journal Article
·
· AIChE Journal (American Institute of Chemical Engineers)
A double-slit model developed can predict the frictional two-phase pressure drop, external liquid holdup, pellet-scale external wetting efficiency, and gas-liquid interfacial area in cocurrent downflow trickle-bed reactors operated under partially wetted conditions in the trickle flow regime. The model, an extension of the Holub et al. (1992, 1993) mechanistic pore-scale phenomenological approach, was designed to mimic the actual bed void by two inclined and interconnected slits: wet and dry slit. The external wetting efficiency is linked to both the pressure drop and external liquid holdup. The model also predicts gas-liquid interfacial areas in partially wetted conditions. An extensive trickle-flow regime database including over 1,200 measurements of two-phase pressure drop, liquid holdup, gas-liquid interfacial area and wetting efficiency, published in 1974--1998 on the partial-wetted conditions, was used to validate the modeling approach. Two new improved slip-factor functions were also developed using dimensional analysis and artificial neural networks. High-pressure and -temperature wetting efficiency, liquid holdup, pressure drop, and gas-liquid interfacial area data from the literature on the trickle-flow regime using conventional monosized beds and catalyst bed-dilution conditions were successfully forecasted by the model.
- Research Organization:
- Laval Univ., Quebec, PQ (CA)
- OSTI ID:
- 20080301
- Journal Information:
- AIChE Journal (American Institute of Chemical Engineers), Journal Name: AIChE Journal (American Institute of Chemical Engineers) Journal Issue: 3 Vol. 46; ISSN AICEAC; ISSN 0001-1541
- Country of Publication:
- United States
- Language:
- English
Similar Records
Modeling of trickle-bed reactors at low liquid flow rates
Improved prediction of pressure drop and liquid holdup in high pressure trickle-bed reactors
High-pressure trickle-bed reactors: A review
Thesis/Dissertation
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:7162792
Improved prediction of pressure drop and liquid holdup in high pressure trickle-bed reactors
Conference
·
Mon Dec 30 23:00:00 EST 1996
·
OSTI ID:416419
High-pressure trickle-bed reactors: A review
Journal Article
·
Fri Aug 01 00:00:00 EDT 1997
· Industrial and Engineering Chemistry Research
·
OSTI ID:536420