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- 저자 : Anis Hamza Fakeeha (검색결과 2 건)
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Syngas production via CO2 reforming of methane using Co-Sr-Al catalyst
Anis Hamza Fakeeha,Ahmed Sadeq Al-Fatesh,Muhammad Awais Naeem,Wasim Ullah Khan 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2
The effect of addition of strontium in Co based catalysts during CO2 reforming of methane wasinvestigated in the temperature range 500–700℃. The Co/γ-Al2O3 supported catalysts with strontiumas a promoter (0–2.25 wt%) were prepared by incipient wet impregnation method. Numeroustechniques such as N2 adsorption–desorption isotherm, H2 temperature-programmed reduction (TPR),temperature-programmed desorption (TPD), X-ray diffraction (XRD), thermogravimetric analysis (TGA),Transmission Electron Microscopy (TEM), pulse chemisorption and temperature-programmed oxidation(TPO) were applied for characterization of fresh and spent catalysts. The results of characterizations andcatalyst activity test revealed that introduction of Sr in Co/γ-Al2O3 catalyst had significant effect onstability and coke suppression. The Sr addition improves the metal–support interaction as well asenhances the Lewis basicity of the catalyst. The improvement in basicity helps the chemisorption anddissociation of CO2 over the catalyst which in turn reduces carbon deposition.
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The Effect of Sc Promoter on the Performance of Co/TiO2–P25 Catalyst in Dry Reforming of Methane
Ahmed Sadeq Al-Fatesh,Muhammad Awais Naeem,Anis Hamza Fakeeha,Ahmed Elhag Abasaeed 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.8
In the present work, the effect of scandium (Sc) promoter on the performance of Co/TiO2–P25 catalyst in dry reforming of methane has been investigated. The catalysts were prepared by the incipient wet impregnation technique. For each catalyst, the Co loading was fixed at 5 wt %, while the Sc loading was varied from 0.0 to 2.0 wt %. The experiments were carried out at atmospheric pressure in a micro tubular reactor at a temperature of 700 °C. For better understanding and comparison, the catalysts were characterized by various techniques such as Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), H2-temperature-programmed reduction (TPR), CO2-temperature-programmed desorption (TPD), and thermogravimetric analyses (TGA). The results revealed that the promotion of Co/TiO2–P25 catalyst with Sc has a significant impact on its catalytic performance and the amount of carbon deposition. The doping of Co/TiO2–P25 catalyst with Sc improves the basicity and enhances the metal support interaction in the catalyst. At higher Sc loading, Co metal oxidation became substantial that triggered severe catalyst deactivation. Amongst all Sc-promoted catalysts, 0.75 wt % Sc-promoted catalyst exhibited the highest CH4 and CO2 activity with minimum deactivation.
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