الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 113 |  |  |
| | | from | 113 | | |
Abstract
An experimental set up has been designed, fabricated, installed and operated for evaluation the effect of different operating parameters such as temperature (T), hydrogen gas flow rate (G), water flow rate (L) and molar flow ratio (L/G) of feed water to hydrogen gas on the exchange performance of deuterium between water and hydrogen gas in a packed liquid phase catalytic exchange (LPCE) column.The temperature ranged between 298 to 333 K, hydrogen flow rate from 9 to 10.5 mol/m2/s, water flow rate from 8.55 to 10.45mol/m2/sand molar flow ratio (L/G) from 0.9 to 1.1.
A mathematical model has beenderived tocalculate the height of the LPCE column and evaluate its performance by calculatingthe number of transfer units (N.T.Us),the height oftransfer unit (H.T.U) as well as the deuterium extraction efficiency from gas phase (η)at steady state conditions.The model wasutilized also to determine the concentration profile of deuterium in both water and hydrogen gas as the column was divided into Nequal segments and the relevant differential equations were solved usingMATALAB software.
The results showed that the deuterium extraction efficiency (η) is increased by the increase of the water flow rate and accordingly by the decrease of the hydrogen gas flow rate taking into account the flooding characteristics of the packed LPCE column. Also, it was found that the efficiency was increased by the increase of the temperature taking into account the interactions between the other controlling factors.Results revealed that the best deuterium extraction efficiency from hydrogen gas to the water was obtained at maximum number of transfer units of 4.47, operating temperature of 333K, molar flow ratio (L/G) of 1.1, hydrogen flow rate of 9.5 mol/m2/s and water flow rateof 10.45mol/m2/s.