OP-II-3

PP-III-67Particle size and specific surface area of these catalyst were in the range of13.85-16.70 µm and 5.08-9.36 m 2 /g respectively. EDS mapping technique reportedhomogeneous dispersion of La and Ce on the surface.Activity of prepared catalyst was carried out with laboratory-scale gasifier usingphysic nut waste as raw materials at 700°C and 800°C (Figure 2). Online TCD-NDIRgas analyzer indicated that the main gaseous products from gasifying process isCO 2 , CO, H 2, and C x H y . In addition, significant amount of condensable organiccompound (tar) was converted to favorable permanent fuel gas by prepared catalyst.La 0.8 Ce 0.2 NiO 3 catalyst exhibited highest activity at 800°C with carbon conversion of60%. Addition of Ce can enchanced oxygen storage and mobility on the surface ofcatalayst [2] which resulted in superior hydrocarbon cracking performance. Long termstability test of the perovskite catalyst was also carried out for 24 hours withnegligible change in catalytic activity in term of quality and quantity of gas production.Table 1. Characteristics of perovskite-catalyst.CatalystCrystalsize(nm)Particlesize(µm)Specificsurfacearea(m 2 /g)LaNio 3 14.35 16.70 5.08La 0.8 Ce 0.2 NiO 3 14.69 16.37 7.06La 0.6 Ce 0.4 NiO 3 12.33 13.85 9.36AirGasificationunitFeederN 2K-type thermocoupleCatalyticunitCondenserGas analyzerFigure 2. Schematic of the catalyticgasification system setupReferences[1]. A.J Zhou et al. Fabrication and thermoelectric properties of perovskites-type oxide La 1-x Sr x CoO 3 .Journal of Alloys and Compounds, 449, 2007, 105-108.[2]. Cui, Y. et al. Steam reforming of glycerol: The experimental ativity of La 1-x Ce x NiO 3 catalyst incomparison to thermodynamic reaction equilibrium. Applied Catalysis B,90, 2009, 29-37AcknowledgementsThis research was supported by the National Metal and Materials Technology Center(Project No. MT-B-52-CER-07-249-I). K.Soongparsit thanks The Chulalongkorn UniversityGraduate Scholarship to Commemorate the 72 nd Anniversary of His Majesty King BhumibolAdulyadej and The Research Unit of Advanced Ceramics and Polymeric Materials forfinancial support.564