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Register a new userتأثير تفاعل السيلنة على هيدروفيلية الحفاز السيليكاتي القطبي MCM-41
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Aِl-Baath University ورقة بحثية
Publication date
2017
fields
Chemistry
and research's language is
العربية
Created by
Shamra Editor
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حضرت الحفازات السيليكاتية ذات المسام ميزو من نوع MCM-41 بطريقة التكاثف حيث تم التفاغل بين البادئة السيليكاتية TEOS )Tetra ethyl ortho silicate) مع 3 – (Mercapto propyl trimethoxysilane( MPTS و ذلك بوجود مادة فعالة سطحيا (CetylTrimethylAmmonum bromide (C16TAB هي في درجة حرارة الغرفة, عملية تغير هيدروفيلية سطح الحفاز تمت باستخدام مادة Hexamethyldisilazane و التي يرمز لها بالرمز (HMDS).
A silicate catalyst prepared which has a mezopore type (MCM-41) ,by manner that condensation where the interaction between Tetra Ethyl Ortho Silicate (TEOS) with 3-Mercapto Propyl Tri-methoxy Silane (MPTS), in the presence of superficial active substance {Cetyl Trimethyl Ammonium Bromide(C 16 TAB)}at room temperature. The process of changing the surface hydophilic of the catalyst has done by using substance( Hexa methyl disilazane), which symbolized by the symbol (HMDS).
References used
Guidotti .M, Gener I.B., Gianotti E., Marchese L., Mignard S., Psaro R., Sgobba M., Ravasio N., The Effect of Silylation on Titanium Molecules, Mecropours and Mesoporous Materials (2008), 111, 39-47
Arreche R.A., Blanco M.N., Martin M., Vazquez B.G., Structural Synthesis of Hydrophilic and Hydrophopic Silica for its Use in Food Packaging Films, Procedia Materials Science (2012), 1, 572-579
Kim J.M., Kwak J.H., Jun S., Ryoo R., Ion Exchange and Thermal Stability of MCM-41, Phys Chem, (1995),99 (45), pp 16742-16747
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لقد تم تحضير وتوصيف خمسة حفازات من نوع V-MCM-41 مختلفة عن بعضها في كمية الفناديوم وقد تبين أن الفناديوم موجود في بنية الحفاز
درس تأثير الأمواج فوق الصوتية في تفاعل هدرجة الغلوكوز، باستخدام الهيدروجين الناتج عن
تفاعل الماء مع مركب بور هيدريد الصوديوم، و ذلك مقارنة مع تأثير التحريك الميكانيكي، أو ترك
المحلول في حالة ركود، فكانت النتيجة أن استخدام الأمواج فوق الصوتية يؤدي إ
لى زيادة كمية
السوربيتول الناتجة عن الهدرجة، و ذلك عند دراسة تأثير تغير كل من عامل الزمن، و التركيز
و حموضة الوسط في تفاعل الهدرجة، و على من الرغم أن الزيادة متواضعة إلا أنها تشجع على دراسة
تفاعلات اصطناع كيميائي أخرى قد تكون نتائجها مميزة. و قد أمكن متابعة هذا التفاعل و بشكل
دقيق بإجراء التحاليل على جهاز الكروماتوغرافيا السائلة ذات الأداء المرتفع الذي يعتمد على تحديد
كمية الغلوكوز غير المتفاعلة، و كمية السوربيتول الناتجة في وقت واحد.
In this researchthe Gross - Pitaevskii equationhas been concluded taking in to consideration
tow and three body interaction potential. The results were compared to
thesta-te in which the twobody interaction has been accepted. Thenelementary
excitementfrequencies have been calculated of Bose Einstein condensation in the presence
of three body interaction.
The Umayyad state has raised on a basic support represented by Arab discrimination
. In time the prospect of the Islamic call has expended . The Arab Islamic world parties
have expended to include Arabs and non Arabs of different races . the suppor
ters have
become as second center in the literary status and the social treatment on both . The
political parties have noticed that there is a type of a complaint of the supporter so they
attracted them to it . This discrimination has extended to include the Arabs themselves so
they sided with the tribe bloc and persecuted others . The conflict has been between Arabs
and non Arabs and between Arabs themselves Yemen and Al-Qaysiyah,This was one of
the reasons for the deterioration of the Umayyad state and its fall .
The study development of diffusion flame has special importance in applications and industrial burners.
For achieving this aim, a diffusion burner was manufactured from Steel metal and three models of bluffbodies
were prepared with different engineering shapes: Diverge inside outside bluff-body, Rods bluff
body, and Combined bluff-body.
In addition, designing and building of integrated experimental system with group of control systems for
supply fuel and air flow are described. On the other hand we prepared system of Schieren Photography
and measured length of Diffusion Recirculation flame and obtained good results in field of reaction and
diffusion through analyzing Schieren Photography for flame front. The obtained results (Hvorticity =54
mm and Wvorticity= 52.5 mm) result widened stability range of flame front.
Effect of vorticity and diffusion was studied of soot free length fraction (SFLF) and considered as an
important parameter in industrial applications for burners, leading to reductions in pollution and
poisonous gas emission. The results (SFLF=0.2) are achieved for the first time in comparison to results of
literature review.
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