One-step synthesis of LaNiO3 with chitosan for dry reforming of methane. (17th May 2018)

• Record Type: Journal Article
• Authors: Oliveira, Ângelo A.S.; Medeiros, Rodolfo L.B.A.; Figueredo, Gilvan P.; Macedo, Heloísa P.; Braga, Renata M.; Maziviero, Fernando V.; Melo, Marcus A.F.; Melo, Dulce M.A.; Vieira, Marcela M.
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 20(2018)
• Page Start: 9696
• Page End: 9704
• Publication Date: 2018-05-17
• Subjects: LaNiO3 -- Chitosan -- One-step synthesis -- Dry reforming of methane -- H2; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.03.212
• Languages: English
• ISSNs: 0360-3199

Abstract

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 −1 g −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. Highlights: One-step synthesis using chitosan as a low cost chelating agent. The in-situ XRD experiments indicate good resistance to sintering. The LaNiO3 practically did not suffer with loss of stability. The La2 O2 CO3 was identified only in the perovskite tested at 600 °C.