Preliminary Study on POP Precursors

Chlorobenzenes and furans are known to be precursors of dioxins during solid waste combustion processes and are often used as model molecules to imitate the structure of dioxins. During this work, the selective combustion of chlorobenzenes 

Chlorobenzene catalytic combustion over zeolite catalysts 

Three types of platinum catalysts were compared in this study l%PtAl203, 1.2%PtSi02 and a series of PtHFAU zeoUtic catalysts with a Si/Al ratio of 5 (Table 5.1). 

Before the reaction, the catalysts were calcined in situ under dry air at 400°C for six horns. The reactions were carried out at atmospheric pressure under wet air (1.03% water corresponding to 53% relative humidity), with a gas homly space velocity (GHSV) of 18,000 h and for temperatures varying between 250 and 350X. 

Figme 5.4 shows that whatever the reaction temperature, l.l%PtHFAU(5) is the most active and the most selective catalyst for this reaction, despite its lower 

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