OP-II-3

PP-III-67ENHANCED GASIFICATION OF PHYSIC NUT WASTE OVERSOL-GEL DERIVED La 1-x Ce x NiO 3 PEROVSKITE CATALYSTKanit Soongprasit 1,2 , Duangdao Aht-Ong 1,2 ,Viboon Sricharoenchaikul 3 , and Duangduen Atong 41 Department of Materials Science, Faculty of Science, Chulalongkorn University,Bangkok, 10330, Thailand2 Research Unit of Advanced Ceramics and Polymeric Materials, National Center ofExcellence for Petroleum, Petrochemicals and Advanced Materials, ChulalongkornUniversity, Bangkok, 10330, Thailand3 Department of Environmental Engineering, Faculty of Engineering, ChulalongkornUniversity, Bangkok, 10330, Thailand4 National Metal and Materials Technology Center, Thailand science Park,Pathumthani, 12120, Thailand, duangdua@mtec.or.thPerovskite-type mixed oxides La 1-x Ce x NiO 3 (x=0, 0.2, and 0.4) were prepared bysol-gel method with polyvinyl alcohol (PVA) as gelating agent. Sol-gel method usuallyreported with smaller particle size, low agglomeration and low process temperature[1]. The as-prepared catalyst were calcined at 800 °C for 5 hrs. Effects of Cesubstituted La on crystal structure and morphology of perovskite catalyst wereinvestigated. Crystal structure characterized by XRD showed peak characteristics ofLaNiO 3 at all condition and CeO 2 phase when Ce was added into catalyst precursorswithout La(OH) 3 , the intermediate phase during LaNiO 3 transformation, as show inFigure 1. The greater Ce substitution was confirmed by the increase of CeO 2 peakintensity. Moreover, NiO peak intensity increased with Ce substitution because ofoxidation of Ni ion during calcination. Introduction of Ce tended to decrease crystalsize of perovskite catalyst from 14.35 nm to 12.33 nm while increase surface area toalmost 2 times (Table. 1). SEM images displayed homogeneous dispersion ofcatalyst particles prepared by sol-gel method with low agglomeration.Intensity (a.u.)X=0.4X=0.2X=015 25 35 45 55 65 75 852thetaFigure 1. (a) XRD pattern of synthesized La 1-x Ce x NiO 3 (x=0, 0.2 and 0.4)(• LaNiO 3 , CeO 2 , NiO), (b) SEM images of La 0.6 Ce 0.4 NiO 3 catalysts563