Loading...
Search
Friend's email | |
Your name | |
Your email | |
enter code | |
This page was sent successfuly
440 viewed
ساخت کاتالیست متخلخل برای واکنش تغییر فرم گاز متان با بخار آب به روش دومرحله ای احتراقی
اطمینان، آزیتا Etminan, Azita
Microwave-Assisted Coke Resistance and Mesoporous Ni-Co Catalyst in two Steps for Methane Steam Reforming
Etminan, Azita | 2021
440
Viewed
- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 54204 (07)
- University: Sharif University of Technology
- Department: Materials Science and Engineering
- Advisor(s): Sadrnezhad, Khatiboleslam
- Abstract:
- Methane steam reforming (MSR) is an assuring reaction using steam to produce H2 as clean energy over a nickel-based catalyst. We synthesized monometallic NiMgAl2O4 and bimetallic NiCoMgAl2O4 catalysts in a two-step combustion method using urea, glycine, and sucrose, as fuel. BET-BJH, XRD, TGA, TPR, FESEM, and EDX-mapping characterized surface area, porosity, morphology, crystalline structure, and metal-support interaction behavior. The products exhibited well-structured, simple MgAl2O4 spinel and NiO without NiAl2O4, in both specimens. The MSR evaluation tests at 750℃ under atmospheric pressure, CH4: H2O feed ratio of 1:1.6 showed the bimetallic catalyst has the highest conversion (99.30%) with low carbon deposition (0.05%), after 15h. Both catalysts demonstrated a miniature nickel particle sintering. TG analysis revealed 0.0043 and 0.0033 mg filamentous carbon deposited on 3 mg NiMgAl2O4 and 3 mg NiCoMgAl2O4, respectively. No XRD diffraction peaks related to the filamentous carbon was observed. Light nickel particles distributed in the catalysts generated active sites for methane adsorption in the MSR reaction
- Keywords:
- Combustion Synthesis ; Powder Metallurgy ; Catalytic Activity ; Magnesium Aluminate Spinel ; Nickel Aluminate Spinel ; Catalysts Activity and Stabibility ; Carbon Deposition ; Methane Steam Reforming (MSR)
- محتواي کتاب
- view