Hidrodescloração catalítica de bifenilas policloradas (PCBs)

Modeling of Askarel solubility in supercritical CO2 aiming solid residue treatment

“…1 for the naphthalene system. In order to describe the solubility behavior of the Askarel oil in supercritical carbon dioxide, a selection of the predominant PCB compounds was based on the analysis, i.e., tetra, penta, hexa and heptachlorobiphenyl [14]. Table 3 presents the required thermodynamic properties of the Askarel compounds used in the calculation.…”

“…Askarel oil is a mixture of PCB and chlorobenzenes containing various levels of chlorination. The analysis of Askarel oil demonstrated predominance of the congeners tetra, penta, hexa and heptachlorobiphenyl [14]. Further, Askarel oil presented 25% in mass of tetrachlorobenzene, in which was described by 1,2dichlorobenzene and hexachlorobenzene.…”

“…Furthermore, an integrated process to treat contaminated material with Askarel could be a supercritical extractor (CO 2 ) followed by catalytic dechlorination of polychlorinated biphenyls under CO 2 and H 2 atmosphere. This route would convert the contaminated species (PCB) to biphenyl [13,14].…”