Fuel Gas Production by Gasification of Glycerol Waste over Perovskite-Type Oxide Catalysts

作者：Atong Duangduen; Ausadasuk Siritha; Sricharoenchaikul Viboon^*

来源：International Journal of Chemical Reactor Engineering, 2010, 8: A49.

• catalyst
• perovskite
• sol-gel
• glycerol
• gasification

Gasification of glycerol waste which is a by-product from biodiesel production was carried out using LaNiO(3) and LaCoO(3) perovskite-type oxide catalysts in order to enhance the production of fuel gas while reducing tar from the process. This present work showed that perovskite-type oxide could be effectively applied for cracking of tar from gasification of glycerol waste. The perovskite catalysts were prepared by a sol-gel process using PVA. The optimum condition for synthesis of LaCoO(3) and LaNiO(3) perovskite oxide was identified when the precursor was mixed metal ion and PVA containing a mole ratio of metal ion to PVA monomer unit as 1:1 and dried at 120 degrees C for 20 h. The synthesized materials were calcined at different temperature and the phases were characterized with x-ray diffraction (XRD). The results showed that the single crystalline phase of perovskite without intermediate phases was achieved from calcination at 800 degrees C for LaNiO(3) and only 700 degrees C for LaCoO(3). The specific surface areas of LaNiO(3) and LaCoO(3) catalysts were in the range of 2.46-5.55 m(2)/g and 3.13-7.68 m(2)/g, respectively. SEM micrographs of catalyst illustrated a fluffy and foam structure with porous network. Catalytic activity of the prepared samples was tested by conversion of glycerol waste in a fixed-bed reactor. The catalytic reaction was carried out at a temperature of 500-800 degrees C. At high temperatures LaNiO(3) appeared to be a superior catalyst which enhanced the production of favorable gaseous species. However further gas upgrading may be required because of low LHV and H(2)/CO ratios obtained at these conditions.

• 出版日期2010