Bitumen Blowing Tower Emissions 1

[serendepidy]

We run a bitumen blowing tower producing emissions of dioxins and PAH's, which we exhaust to an incinerator.
The incinerator is reaching retirement and we are looking at employing worlds best practice to remove the toxic compunds from the blowing tower exhaust. Is there best thing to do to build another incinerator or are there other means by which these harmful chemicals can be removed from the exhaust. To summarise, what is the best way to remove dioxins and PAH's from an exhuast stream.

 

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From old notes, the noxious fumes produced in bitumen air-
blowing processes are dealt with by water scrubbing followed by incineration in a fume disposal furnace.

In a few refineries catalysts such as Fe[sub]3[/sub]Cl (less than 1000 ppm) are used to reduce the blowing time.

Many refineries have by now stopped using oxidized bitumen replacing it with vacuum residues (improved vacuum distillation) from some crudes yielding harder penetration bitumens having the desirable mechanical properties of penetration grades. In these refineries blending of penetration bitumens (hard and soft) plays an important role.