Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Pressure drop

Effect of Surfactant Additives on Phase Inversion in Oil-Water Pipe Flow System

A.A. Alwasiti; N.M. Farhan

Engineering and Technology Journal, 2017, Volume 35, Issue 2, Pages 106-110

This research investigates the effect of surfactant additives on phase inversion point in the oil-water flow in horizontal pipe. Two types of surfactants were used in the experiments; anionic type (sodium lignosulfonate (SLS)) at 200 ppm and cationic type (hexadecyltrimethyl ammonium bromide (CTAB)) at 100 ppm. The experiments were carried at mixture velocities (0.8, 1, 1.9 and 2.3) m/s. The results showed that the phase inversion points are unaffected by surfactant addition or velocity at low mixture velocities while they shifted downward at high mixture velocities. The experiments show also that anionic surfactant addition caused a forward shifting in phase inversion point and downward shifting in the addition of cationic surfactant at high mixture velocities.

Hydrodynamics in a Trickle Bed Reactor

Muhammad Fadel Abd; Farah Talib Jasim; Luma Shihab Ahmed

Engineering and Technology Journal, 2013, Volume 31, Issue 15, Pages 2860-2875

Experimental investigations have been carried out to study the performance of
trickle bed reactor. The effect of key parameters that play predominate role in the
performance of trickle bed reactor was studied. A laboratory unit was constructed
for this purpose where a versatile reactor setup required " high pressure stainless
steel reactor of 0.05m i.d × 1.25m height", in which the hydrodynamic
experiments carried out under different operating condition namely, superficial gas
velocity and liquid velocity , reactor pressure, bed temperature .Air–water system
was used for hydrodynamic experiments pressure drop, dynamic liquid holdup, and
axial dispersion coefficients were estimated. The results also show that the
dynamic liquid holdup increases with increasing liquid velocity and decreases
with increasing superficial gas velocity and bed temperature. Axial dispersion
tends to increase with increasing superficial gas and liquid velocities while it
decreases with increasing bed temperature.

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

Ali H. Jawad

Engineering and Technology Journal, 2009, Volume 27, Issue 7, Pages 1336-1350

An exclusive study has been done on experimental investigation of the two-phase flow
pressure drop in an air-non-Newtonian liquid (CMC solutions) system in bubble column.
The effects of gas and liquid flow rate on two-phase pressure drop have been illustrated.
Experiments in a 0.2-m diameter, 2.4-m-high bubble column were carried out to determine
the pressure drop. At the selected superficial velocities, two flow regimes were observed:
heterogeneous bubbling flow and heterogeneous churn turbulent flow, they were identified
through the slope changes in the plots of pressure drop and gas holdup. The pressure drop
did not seem to be affected by the superficial liquid velocity and it was increased as the
superficial gas velocity decreased or the CMC concentrations increased.