One-step synthesis of LaNiO3 with chitosan for dry reforming of methane |
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| Authors: | Ângelo A.S. Oliveira Rodolfo L.B.A. Medeiros Gilvan P. Figueredo Heloísa P. Macedo Renata M. Braga Fernando V. Maziviero Marcus A.F. Melo Dulce M.A. Melo Marcela M. Vieira |
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| Affiliation: | 1. Postgraduate Program in Petroleum Science and Engineering, Federal University of Rio Grande Do Norte, 59078-970 Natal, Brazil;2. Postgraduate Program in Materials Science and Engineering, Federal University of Rio Grande do Norte, 59078-970 Natal, Brazil;3. Postgraduate Program of Chemistry, Federal University of Rio Grande Do Norte, 59078-970 Natal, Brazil;4. Academic Department of Chemistry, Federal Institute of Maranhão, 65030-005 São Luís, Brazil;5. Agricultural School of Jundiaí, Federal University of Rio Grande Do Norte, 59078-970 Natal, Brazil;6. Postgraduate Program in Chemical Engineering, Federal University of Rio Grande Do Norte, 59078-970 Natal, Brazil;g. Institute of Chemistry, Federal University of Rio Grande Do Norte, 59078-970 Natal, Brazil |
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| Abstract: | This paper presents a new preparation method of a catalytic precursor LaNiO3 perovskite type in one-step using chitosan as a chelating agent. During synthesis La and Ni nitrates were added into a solution containing chitosan, placed into an oven to decompose the reagents and subsequently calcined. The perovskite was characterized by X-ray diffraction (XRD), scanning electron microscopy with chemical microanalysis (SEM-EDS), temperature-programmed reduction (TPR) and thermogravimetric analysis (TGA). The catalytic tests were conducted in a space velocity of 18 Lh?1g?1 at three temperatures: 600, 700 and 800°C. The characterization results indicated the formation above 95% of LaNiO3 phase with good chemical homogeneity at lower temperature with metallic area and dispersion compatible with literature. The catalytic test results showed good levels of CH4 and CO2 conversions and good yields of CO and H2. Therefore, the described method is a simple, fast and low-cost route to prepare LaNiO3 for hydrogen production via dry reforming of methane. |
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| Keywords: | Chitosan One-step synthesis Dry reforming of methane |
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