Abstract
Hydrogen production from CO2 reforming of methane over 20wt%.Co/Nd2O3 has been investigated in a fixed bed stainless steel reactor. The 20wt%.Co/Nd2O3 catalyst was synthesized using wet impregnation method and characterized for thermal stability, textural property, crystallinity, morphology and nature of chemical bonds using techniques such as TGA, XRD, N2 adsorption-desorption, FESEM, EDX and FTIR. The CO2 reforming of methane was performed at feed ratio (CH4:CO2) between 0.1-1 and reaction temperature ranged 973-1023 K. The catalyst displayed good activity towards selectivity and yield of hydrogen as well as CO, a by product. The selectivity and yield of Hydrogen increases with feed ratio and reaction temperature. The 20wt%.Co/Nd2O3 catalyst displayed promising catalytic activity for hydrogen production with the highest yield and selectivity of 32.5% and 17.6% respectively.Keywords: Cobalt; Greenhouse gases; Hydrogen; Reforming;; Neodymium (III)Oxide
Highlights
Since the first synthentic production of Hydrogen in the early 16th century, there has been a lot of technological advancement in the production process through concerns of researches over the years (Sehested, reseach and development (National Hydrogen 2006)
A more environemental friendly process for hydrogen production is by utilizing both CO2 and CH4, key principal components of greenhouse gases as feedstock for hydrogen or syngas production (Equation (3) (Braga et al, 2014)
Catalyst characterization: The as-sythensized 20wt.%Co/Nd2O3 catalyst was characterized for physicochemical properties by temperature programmed calcination, N2 adsorption-desorption isotherm, X-ray diffraction, Fourier transform infrered spectroscopy (FTIR), field emission scanning electroscopy (FESEM), energy dispersion X-ray spectroscopy (EDX) and particle size distribution analysis
Summary
Catalyst characterization: The as-sythensized 20wt.%Co/Nd2O3 catalyst was characterized for physicochemical properties by temperature programmed calcination, N2 adsorption-desorption isotherm, X-ray diffraction, Fourier transform infrered spectroscopy (FTIR), field emission scanning electroscopy (FESEM), energy dispersion X-ray spectroscopy (EDX) and particle size distribution analysis. Information about the thermal stability of the fresh 20wt.%Co/Nd2O3 catalyst was obtained from temperature programmed calcination using thermal gravimetric analyzer (TA instruments, Q500). The catalyst sample was calcined under the flow of compressed air (99.99% purity) from room temperature to 1173 K. Catalytic activity: The catalytic activity of the 20wt.% Co/Nd2O3 catalyst for H2 production via CO2 reforming of methane was performed in a fixed bed stainless steel reator. The CO2 reforming of methane over the 20wt.% Co/Nd2O3 was performed at reaction temperature ranging from 973 to 1123 K at 1 bar and gas hourly speed velocity of 30000 mmol/gcatalyst/min.
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