DECOMPOSITION OF CHLORINATED DIOXINS, ODOROUS COMPOUNDS AND NOX FROM MSW INCINERATION PLANT BY OXIDIZING CATALYST

An experiment was carried out to decompose chlorinated dioxins(PCDDs, PCDFs) Chlorobenzenes, NOx and odourous compounds(H2S, CH4S, C2H6S2, C 8H8, C2H6S, C2H4O, NH3) simultaneously using a catalyst in the MSW inc ineration plant. The experiments were conducted at temperatures from 2 00-degrees-C to 400-degrees-C and from 3000h-1 to 6000h-1 at space vel ocity. A catalyst containing V2O5 and WO3 on the basis of TiO2 is used , an oxidizing catalyst of the honeycomb type. The average decompositi on efficiencis were 95%, 98%, 92% for PCDDs(4 approximately 8CDDs), PC DFs(4-8CDFs) and Chlorobenzenes(3-6CLBs) at a reaction temperature of 350-degrees-C and a space velocity of 3000h-1, more than 90% for NOx a t a reactiont temperature of 300-degrees-C and more than 80% for odour ous compounds at the reaction temperature of 300-degrees-C and a space velocity of 6000h-1. All those compounds were decomposed successfully with increasing contact time and surface. The rate-determing step was the chemical reaction of catalyst surface.