College of Engineering

In this work, it was attempted to study the kinetic of vanadium recovery from fly ash residue by leaching with NaOH solution from previous work of Mosa (1999).The selected data was chosen when particle size of fly ash were 125, 150 and 200 µm, temperature 343, 353 and 373 K, reaction (leaching) time from 1 to 8 hours and at almost constant concentration of  NaOH solution (molarity 3, 3.5 and 4 M).The results showed that vanadium recovery increased with time and temperature and decreased with particle size.A second degree polynomial mathematical correlation was e

A theoretical study has been performed to analyze the mass transfer and shear stress in co-current annular,two phase gas-liquid (air-water), turbulent flow conditions in a horizontal pipe using eddy diffusivity concept. The mass transfer coefficient has been predicted and discussed for a wide range of liquid superficial Reynolds number (Re=2000 to 40000), gas superficial Reynolds number (Re=10000 to 80000), liquid Schmidt number (Sc temperatures (25oC - 60oLsgsL=100 to 3000), and liquid C).

  This thesis suggests a simple system to study, and accordingly design, bubble column reactors. The suggested system focuses on studying two important parameters of the gasliquid mass transfer operations.