| 摘要 |
<p>PURPOSE:To provide the title catalyst consisting of V2O5, TiO2 and coke which catalyst has high resistance to ammonium sulfate type by-products and can be regenerated by heating when poisoned. CONSTITUTION:An adequate amt. of V2O5 and such an amt. of TiO2 are mixed with iron-manufacturing coke with superior strength and thermal stability obtd. by carbonizing coal, followed by addn. of a suitable binder and press molding. The coke regulated to a suitable grain size may be impregnated with an aq. soln. of V and Ti cpds., and calcined to support V2O5 and TiO2 on the coke. It is most effective to control the V2O5 and TiO2 contents in the catalyst compsn. to 0.1- 20% and 5-50%, respectively. The coke has pores of 1-200 mu and is highly gas permeable, so clogging due to acidic ammonium sulfate, etc. hardly occurs in the pores. Since the coke is stable at about 400 deg.C even in the presence of O2, the catalyst can be regenerated by heating even if clogged.</p> |
