ADSORPTION DU NICKEL SUR LES OXYDES METALLIQUES

الموضوعات

علوم بحتة وطبيعية

الملخص

This work studies the nickel anchored on several oxides, in the aim to be used asbenzene hydrogenation catalyst. The metal ions, adsorbed on the oxide surface, are reducedunder ? radiation in aqueous solution. The radiolytic way has been proven to be powerful toolfor obtaining dispersed nanoparticules in colloidal state, deposited on a solid support or inheterogeneous state. This process makes it possible to control the size of the particles, theirlocalization on the surface or into volume.In the dispersed systems, the surface phenomena play an impotant role. Theadsorption of ions or molecules on the surface of the aggregates can modify their propertiesand improve their activity. This is why we paid attention to the step of nickel adsorption onthe oxides by looking for the optimal condition in order to obtain an electrostatic interactionbetween the metal ions and the surface of the support, favorable to a homogeneous anddurable nickel dispersion. This step was followed by UV-visible spectrophotometry and pHmetry.In the second step, the irradiated samples are characterized by various technics (MEB,analyzes X and XRD). For the MgO support, Mg2Ni phases and Ni2Mg of nanometric sizewere evidenced. These intermetallic compounds are of first importance in the energy field.The nanoparticules of Ni/ZrO2 tested in catalysis in the benzene hydrogenationreaction exhibit good catalytic properties. They are more active in decreasing temperaturethan in increasing ones, indicating an anhencement of the catalytic activity during working.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0eb46629-a9c8-488b-8f3b-68ee126a27cb

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

344765_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"N. Keghouche","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"نورا عوافق","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

French

المصدر والدورية

اسم المصدر

ADSORPTION DU NICKEL SUR LES OXYDES METALLIQUES

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

N. Keghouche

الإعداد

نورا عوافق

الاقتباسات الببليوغرافية