Patent ID: 8088709
Filing Date: 2012-01-03
Classification: B01J

Abstract:
1. A method for preparing a selective reduction catalyst for flue gas denitrification, the method comprising a step of supporting 0.5-10 wt %, based on the weight of titania, of vanadium oxide on a titania support having 0.1-10 wt % tungsten, in which the titania support having the vanadium oxide supported thereon is subjected to a ball milling step carried out at a BPMR (ball powder mass ratio) of 10:1-100:1 before and/or after the calcination thereof, wherein the method increases non-stoichiometric vanadium by 16-165%, and non-stochiometric titanium by 19-1,874%, wherein the method comprises the steps of: a) providing a vanadium source or precursor aqueous solution; b) adding the titania support to the vanadium source or precursor aqueous solution to prepare a slurry; c) drying the slurry; and d) calcining the dried slurry; in which the ball milling step is carried out between steps c) and d) or after step d), in which the ball milling is dry ball milling.