Partial Oxidation Catalysts Derived from Ni Containing Alloys for Biomass Gasification Process

Preparation of partial oxidation catalysts for post treatment of bio-waste gasification process is proposed. Oxidized metal alloys containing nickel, which can be expected to have strong interaction between nickel and support oxides with high dispersion were used in the partial oxidation of model compounds of bio-waste gas. Commercial metal alloy tube was used as a catalyst precursor because tube wall catalyst can provide enough space to accommodate deposited carbon without plugging the reactor. Metal alloy tube was calcined under oxygen flow at 1273 K for 2 h. Then partial oxidation at 1003 K was conducted with model reactants such as tetradecane, toluene, or naphthalene and thiophene diluted in toluene. Activity with tetradecane decreased as: Hastelloy > Superinvar > SUS304 >Inconel, naphthalene and thiophene caused deactivation but dilution could slow down the deactivation process. The activity was suspected to depend mainly on the nickel content of the alloy. In addition, Fe, Co and Mo might have significant effect on the activity. The long term (5 days) activity of Hastelloy is higher with toluene than with tetradecane.