Experimental study on the thermal oxidation of chlorobenzene at 575-825 degrees C

The thermal degradation processes of chlorobenzene were investigated using a tubular flow reactor at 1 atm. over the range 575-825 degrees C in reacti on atmospheres in which oxygen was in excess (equivalence ratio Phi = 0.035 ). The concentration profiles of C6H5Cl, CO2, HCl and Cl-2 as well as the m ajor intermediate byproducts (CO, CH4, C2H2, C2H4,vinyl chloride, vinylacet ylene, furane and benzene) were determined as a function of temperature for a residence time of 2 seconds. More seventy organics as trace species were also identified. Most of them are aromatics substituted by Cl (1 to 4), OH (1 or 2) or alkyl groups. Some precursors of dioxins ( benzofuranes and ch lorophenols) were also observed. Experimental results showed that the ring breaking processes were preponderant over the studied temperature range. Re action pathways explaining the formation of mainly observed products are pr esented and discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.