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  1. ساخت کاتالیست متخلخل برای واکنش تغییر فرم گاز متان با بخار آب به روش دومرحله ای احتراقی
ساخت کاتالیست متخلخل برای واکنش تغییر فرم گاز متان با بخار آب به روش دومرحله ای احتراقی
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
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54204 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Sadrnezhad, Khatiboleslam
  7. Abstract:
  8. 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
  9. Keywords:
  10. Combustion Synthesis ; Powder Metallurgy ; Catalytic Activity ; Magnesium Aluminate Spinel ; Nickel Aluminate Spinel ; Catalysts Activity and Stabibility ; Carbon Deposition ; Methane Steam Reforming (MSR)

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