الفهرس 
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Abstract
The present work deals with the hydrotreating processes
of Egyptian naphtha stocks (produced from different Egyptian
crude oils). Naphtha hydrotreating as a first stage of
naphtha reforming platforming process is carefully
studied •
The main goal of this research is an Optieization/
node11nig one, concerned with the estimation of a set of
applicable correlations that can be precisely applied to
estimate the optimum operating conditions for hydrotreating
the Egyptian naphtha stocks; whatever is the source of its
original crude oil.
To achieve this goal ,most experimental techniques and
correlations available from the literatures were widely and
carefully reviewed.
The experimental mesurements were carried out using four
different naphtha stocks (originated from Marine Balayem,
Land Balayem, Ras 5houkair blend, and Morgan crude oils )
containing different sulfur contents ranging from 162 to 640
p.p.m .The reactor used for experimentation is 19 mm
diameter and 50 cm height;the catalyst used is that
industrially used in Suez Oil Processing Company (S.O.P.C) ,
called Hydrobon U.O.P 5-12 (Cobalt-Molybdenum catalyst).
The parameters concerned in the presented optimization
technique were mainly naphtha sulfur content,naphtha yield,
and naphtha hydrocarbon chemical composition (P 0 N A).For
this goal ,a programed computational models were developed
to predict the optimum operating conditions for naphtha
hydrotreating processes.
For hydrotr~ating the Egyptian naphtha stocks, th~
optimum operating conditions ,for producing high yields of
naphtha containing trac~s of sulfur (low~r than 0.5 p.p.m)
are :
o
Temperature , C
2
Pressure , kg/cm
-1
L.H.S.V , hr
H tHC ratio, m31
2
3
m
: 320
: 42
: 5
: 125
Furthermore, for mod~lling such units,nov~l correlations
were suggested for predicting the produced naphtha yield,
sulfur cont~nt , and ch~mical composition (P 0 N A) as a
function of the process operating variables (t, p, L.H.S.V,
and H I HC ).
2
The following correlations were among others establishing
the produced naphtha characteristics :
1- Yield ,<VOL”>= 131.253-0.079 (t)--o. 765 t p )+0.1 (H IHC)
2
+1.66(L.H.S.V)
. (1)
2-
-3 -2
Desulfw-ization,<wT96>=98 .2824+3 .8x10 (t)+1 .6x10 ( p )
-2
-8 • 16)( 1 0 (L • H • S • V ) . . . . (c)
3- Naphthenes ,(VOL~>= 64.126-0.097(t)-0.214(p>
.... (3)
4- Paraffins ,<VOL”> = 28.178+0.094 (t )+0 .268 (p >
.... ( 4)
The applicability of these correlations was examined
using the experimental results and actual industrial data of
Suez Oil Processig Company (S.O.P.C) and Cairo Oil
Refining
and also
Company (C.O.R.C ) naphtha hydrotreating units
the recent published data •