Engineering and Technology Journal

Development of Hydrodynamic and Heat Transfer Profiles for Fischer–Tropsch Synthesis in a Fixed Bed Reactor of Different Scales

Mohammed A. Atiya Al Saraj

Volume 34, Issue 14 , December 2016, , Page 2585-2596

https://doi.org/10.30684/etj.34.14A.4

Abstract

Comprehensive hydrodynamic and heat transfer study of Fischer–Tropsch synthesis (FTS) on a home-based cobalt catalyst, with the presence of water–gas shift (WGS), is conducted ... Read More ...

Modeling of Single Channel Monolithic Reactor with The Single pass Flow Operation System

Lange; Zaidoon; A Al-Najar; Jenan; Adel; A. Shuhaib

Volume 28, Issue 11 , May 2010, , Page 2221-2236

https://doi.org/10.30684/etj.28.11.12

Abstract

In the following sections, the recent published studies on modeling andsimulation of monolith reactors were reviewed. Mass transfer, and reaction kineticswere achieved by establishing ... Read More ...

Scale Effects on the Hydrodynamics of Bubble Column

Farah S. Jameel; Mohammad F. Abid

Volume 27, Issue 10 , July 2009, , Page 2142-2164

https://doi.org/10.30684/etj.27.10.18

Abstract

The main object of this study is to investigate the influence of the columngeometric and operating variables ( i.e., column diameter, superficial gas velocityand liquid viscosity) on ... Read More ... The main object of this study is to investigate the influence of the columngeometric and operating variables ( i.e., column diameter, superficial gas velocityand liquid viscosity) on the hydrodynamic parameter ( i.e. , gas holdup, bubbledynamics and liquid phase axial dispersion coefficient ). The experimental dataobtained showed that the gas holdup increases linearly with superficial gasvelocity at both homogeneous and heterogeneous regimes but the rate ofincreasing is slower at the heterogeneous one. The bubble rise velocity was foundto decrease with increasing superficial gas velocity until a transition point wasreached and after that the relationship was linearly increasing. It was observedthat with an increase in liquid phase viscosity and increase in column diameters, adecrease in gas holdup and an increase in bubble size were obtained. It wasobserved that increasing axial position led to an increase in bubble diameter and adecrease in bubble rise velocity. Axial dispersion coefficient which is measuredby tracer response technique was found to increase with gas superficial velocity,increases with column diameter, increases with axial position and decreases withliquid viscosity. This work also presents a theoretical analysis that is used tocalculate the axial dispersion coefficient. The measured axial dispersioncoefficient was generally consistent with the predictions of the well establishedcorrelations from the literature. The validity of the model was settled bycomparing its predication with the objective function of the well-Known empiricalcorrelation formulated by ( Hikita and Kikukawa , 1974) .The comparison showsthat the present model is statistically significant at a 95% confidence level byusing goodness – of – fit test .Also a statstical analysis was performed to get a general correlation for the gasholdup (εg) as a function of the parameters studied:= 0.15325 Fr 0.29617 Ga 0.09223 Bo -0.0424 g eWhere the correlation coafficient ( R ) was equal to ( 0.957) and the absoluteerror (3.5%).

Studies Pressure Drop of gas-Non-Newtonian Liquid Two Phase Flow in Bubble Column

Ali H. Jawad

Volume 27, Issue 7 , May 2009, , Page 1336-1350

https://doi.org/10.30684/etj.27.7.10

Abstract

An exclusive study has been done on experimental investigation of the two-phase flowpressure drop in an air-non-Newtonian liquid (CMC solutions) system in bubble column.The effects ... Read More ...

Hydrodynamics Of Two Phase Flow For Coalescing And Non Coalescing Systems

Thamer J. Mohammed; Mohammed F. Abid; Hiba M. Abdullah

Volume 27, Issue 3 , February 2009, , Page 481-495

https://doi.org/10.30684/etj.27.3.7

Abstract

This experimental study is aimed at investigating the effect of superficial gasvelocity, liquid phase properties and gas distribution on gas holdup, bubblecharacteristics and drag coefficient ... Read More ...

Keywords = Hydrodynamics

Development of Hydrodynamic and Heat Transfer Profiles for Fischer–Tropsch Synthesis in a Fixed Bed Reactor of Different Scales

Abstract

Modeling of Single Channel Monolithic Reactor with The Single pass Flow Operation System

Abstract

Scale Effects on the Hydrodynamics of Bubble Column

Abstract

Studies Pressure Drop of gas-Non-Newtonian Liquid Two Phase Flow in Bubble Column

Abstract

Hydrodynamics Of Two Phase Flow For Coalescing And Non Coalescing Systems

Abstract