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Ahmed Sadeq Ahmed Al-fatesh

Professor

Professor

كلية الهندسة
King Saud University, P.O Box-800, Riyadh-11421 Kingdom of Saudi Arabia
المنشورات
مقال فى مجلة
2014

Hydrogen production from methane dry reforming over nickel-based nanocatalysts using surfactant-assisted or polyol method

Fakeeha, M. A. Naeem, A. S. Al-Fatesh, A. E. Abasaeed, A. H. . 2014

In this study, two series of Ni-based nanocatalysts were synthesized successfully by the polyol and surfactant-assisted methods and subsequently tested for hydrogen production from CO2–CH4 reforming. Surfactant-assisted catalysts were prepared by using cetyl trimethyl ammonium bromide (CTAB) as a surfactant, whereas polyol catalysts were prepared in ethylene glycol (EG) medium with polyvinylpyrrolidone (PVP) as a nucleation-protective agent. The catalytic performance of each catalyst, in terms of H2 yield and selectivity, was evaluated at different temperatures (500–800 °C). In order to clarify and explain the differences in catalytic activities of catalysts, the prepared samples were characterized by various techniques, such as BET, H2-TPR, CO2-TPD, XRD, TGA, SEM, HRTEM and CO pulse chemisorption. The results demonstrated that the method of preparation had a significant effect on the catalytic performance of tested catalysts. Overall, polyol catalysts showed high activity and selectivity for hydrogen production, while surfactant-assisted catalysts exhibited a fairly high resistance towards carbon deposition under similar reaction conditions of dry reforming of methane. Moreover, due to the reverse water gas shift reaction (RWGS), surfactant-assisted catalysts always produced smaller values of H2/CO product ratio than their corresponding polyol catalysts

رقم المجلد
39
مجلة/صحيفة
International Journal of Hydrogen Energy
الصفحات
17009-17023
مزيد من المنشورات
publications

20% iron catalysts supported on combined alumina and silica through different proportions (Al2O3:SiO2:
100:0.00, 90.0:10.0, 80.0:20.0 and 0.0:100.0) were tested for the catalytic…

2019
publications

A novel approach to the in situ regeneration of a spent alumina-supported cobalt–iron
catalyst for catalytic methane decomposition is reported in this work. The spent catalyst was

2018