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Register a new userImprovement of SO3 absorption via using Ozone and active carbon for Oxidation of SO2
تحسين عملية امتصاص SO3 من خلال استخدام الأوزون و الفَحم الفَعّال في اكسدةSO2
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zeina alrostum
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في هذا البحث تمت دراسة عملية تحسين امتصاص so3 الناتج من أكسدة so2 من تيار غازي كمنتج ثانوي من احدى المصانع الكيميائية بدمشق و ذلك باستخدام الاوزون و الفحم الفعال . الهدف الرئيسي من هذا البحث هو : -1 الحصول على تراكيز مقبولة من حمض الكبريت في أوساط مائية مختلفة -2 تخليص التيار الغازي المنطلق من المصنع الكيميائي ما أمكن من SO2. قبل أن ينطلق إلى الجو وفق شروط بيئية مقبولة . لقد أكدت الدراسات المخبرية , أن امتصاص أكاسيد الكبريت تختلف من وسط إلى آخر بوجود الفحم الفعال في الوسط المائس أم لا وقرقرة الأكاسيد الغازية. و الماء المقطر و كذلك قرقرة غاز الأوزون في الأكاسيد الغازية . و فيما يلَي نَعرضُ أهم التَّجارب التي طُبِقَت في هذا المجال.
In this resecarh the improvement of SO3 absorption via oxidation of SO2 ,which is a by product from a chemical plant in Damascus , using Ozone and active carbon – was stadied . The main purpose of this research paperis : . To obtian acceptable concentrations of sulphuric acid in various aqueous mediums . . To eelease SO2gas as a by product frome this flow . The lab study assures that the absorption of sulphuroxides differ from medium to other with or not existance of active carbon in aqueous medium and bubbling the gas oxides and distillated water only and also the bubbling of Ozone gas in gasoxides.
References used
J.M. Connor , in B.L.Crynes (Ed.) : Chemical Reactions as a Means of Separation-Sulphur Removal. Dekker , New York 2007 , P.34-72
(Schenk, P . W and R.Steudel s of Sulphur , in G.NICKLESS(Ed.) : Inorganic Sulphur Oxide Chemistry. Elsevier , Amsterdam, P . 367-418,(1968
W.G. Tucker , J.R. Burgleih in(M.D.Farkas, R.R. Dukes, Sulphur an SO2 Developments Am. Inst.of Chem. Eng. , New York) , P. 103-109
Friedman.L.J in : Sulfur Dioxide Control in Pyro- metallurgy , TMS-AIME 1981 , 189-203
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This paper proposes a new approach to control a Shunt active filter (SAF) to
eliminate harmonic currents and compensate reactive power , this approach called
Predictive Direct Power Control (P-DPC) where the Direct Power Control is combined
with a
Predictive Control , PDC controls active and reactive power to get an unity power
factor and when it combined with Predictive Control , the controller can predict future
behavior for all possible voltage vectors , and the best vector is chosen for the next sample
by minimizing a cost function . we connect this filter with a nonlinear load to the grid and
simulate this systemusing Matlab , Simulink and Simpower , the results shows that P-DPC
decrease Total Harmonic Distortion (THD%) of line current and make it sinusoidal and
improve the power factor .
The research was carried out on (960) broiler chicks of the hybrid Hibrd in
the Poultry Unite of Kharabo–Agriculture Faculty–Damascus University,
during 27/10/2003 and 23/12/2003.
The chicks were distributed randomly since the first day of age int
o four
experimental groups, every group contained 240 chicks distributed as four
replicates, every replication contained 60 chicks, the area of the replication was
5.5m2 and the density was 11 chicks/m2. Every replication is an independent
sector from byre is open type on deep litter, all conditions of keeping and
caring were the same for all birds of replications.
The purpose of research was to study of effect of using different levels of the
energy and raw protein into mixtures of (pre-starter) since the first day until
sixth day of age on absorption of yolk sac, growth of digestive system ,and some
productive parameters of broiler. 48 chicks were dissected, the chicks were
distributed as 16 chicks in the first day and 16 chicks in the fourth day and 16
chicks in the sixth day of age, from every group 4chicks were evaluated.
In this research we have studied the absorbance of some zinc alloys. These alloys were
manufactured in the local market, and these alloys can be used as absorber plate in the
manufacture of solar collectors. We conducted this study in the laborator
y, first (using
tow light sources, 100W and 30 W), and Second in the external medium using direct solar
radiation. Our research provides important information that could be used in improving the
efficiency of solar collectors using absorbent surfaces that has a higher absorbency.
We have also studied the relationship between the absorbance and the atomic number of
the studied alloys. This study showed that the absorbed energy by these metals increase
with their atomic laboratory number Z.
In this work, Ck85 carbon steel was subjected to cyclic heat
treatment.
Process that consisted of cyclic short-duration (3.4 minutes)
holding at 800 C (above Ac3 temperature) followed by forced air
cooling. After 8 cycles (about a total 1 hour du
ration of heating and cooling cyclic), the microstructure mostly contained fine ferrite
grains and spheroidzed cementite. This microstructure possessed
an excellent combination of strength and ductility. The disintegration of lamellar pearlite through dissolution of cementite
at boundaries lamellar during short-duration holding above Ac3
temperature, and the generation of lamellar defects during nonequilibrium forced air cooling were the main reasons of
accelerated spheroidization. The strength initially increased mainly
due to the presence of finer microconstituents (ferrite and pearlite)
and then marginally decreased with the elimination of lamellar
pearlite and appearance of spheroid cementite in the microstructure.
Ozone is now considerd as a pharmaceutical, non operative
,new clinical treatment for carious lesions. The purpose of this study was to
assess the efficacy of Ozone for the management of pit and fissure caries
lesions in first permanent molars.
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