| abstract |
The invention consists of a process for preparing and using a trifolium-shaped catalyst to cooperatively control nitrogen oxide (NOx) and volatile organic compounds containing chlorine (COVC). The catalyst uses an organic vanadium compound as vanadium precursor, and titanium dioxide or titanium-tungsten powder as the carrier molecule; and is prepared using a two-step process comprising: first, a mechanical ball milling process for preparing a powder catalyst; and secondly, an extrusion molding process for preparing a structured trifolium catalyst. The catalyst thus obtained is suitable for removing NO x and COVC respectively from industrial flue gases from, for example, waste incineration, sintering of steel and cast iron and non-ferrous metallurgy, and is also suitable for the cooperative elimination of NO x and COVC. In comparison with an existing commercial catalyst, a commercial vanadium catalyst system must rarely be changed; a two-step process being used, the resulting catalyst not only has a high denitrification rate and a COVC removal efficiency, but also has superior mechanical strength and abrasion resistance, so that the process of preparation is a more advantageous preparation technology for the industrial production of a trifolium-shaped catalyst for the cooperative denitration and removal of COVC. |