Abstract
CO2 methanation was studied over monometallic catalyst, i.e., Ni, Fe and Co; on CeO2-Cr2O3 support. The catalysts were prepared using one-pot hydrolysis of mixed metal nitrates and ammonium carbonate. Physicochemical properties of the pre- and post-exposure catalysts were characterized by X-Ray Powder Diffraction (XRD), Hydrogen Temperature Programmed Reduction (H2-TPR), and Field Emission Scanning Electron Microscope (FE-SEM). The screening of three dopants over CeO2-Cr2O3 for CO2 methanation was conducted in a milli-packed bed reactor. Ni-based catalyst was proven to be the most effective catalyst among all. Thus, a group of NiO/CeO2-Cr2O3 catalysts with Ni loading was investigated further. 40 % NiO/CeO2-Cr2O3 exhibited the highest CO2 conversion of 97.67% and CH4 selectivity of 100% at 290 °C. The catalytic stability of NiO/CeO2-Cr2O3 was tested towards the CO2 methanation reaction over 50 h of time-on-stream experiment, showing a good stability in term of catalytic activity.
Highlights
Global warming has caused several serious impacts on the in recentGlobal warming has caused several serious impacts on environment the environment in recent2 emission is anthropogenic in origin and is the main cause of global years.Increasing years
Many studies focused on two strategies to reduce atmospheric concentration; through carbon capture and conversion to biofuels
Forty percent x/CeO2 -Cr2 O3 catalysts were synthesized by a single step preparation using (NH4 )2 CO3 (PANREAC, 30% NH3 ) as a hydrolysis agent, the details of which are outlined in [3]
Summary
Global warming has caused several serious impacts on the in recentGlobal warming has caused several serious impacts on environment the environment in recent2 emission is anthropogenic in origin and is the main cause of global years.Increasing years. Global warming has caused several serious impacts on the in recent. Global warming has caused several serious impacts on environment the environment in recent. 2 emission is anthropogenic in origin and is the main cause of global years. Increasing CO2 emission is anthropogenic in origin and is the main cause of global. Many studies focused on two strategies to reduce atmospheric CO2CO 26 September. Many studies focused on two strategies to reduce atmospheric concentration; through carbon capture and conversion to biofuels [1,2]. The captured concentration; through carbon capture and CO2 conversion to biofuels [1,2].
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