Details

Autor(en) / Beteiligte

• Palmer, D.
• Pou, J.O.
• Díaz-Ferrero, J.
• Conesa, Juan A.
• Ortuño, N.

Titel

Kinetics of the formation and destruction of PCDD/Fs in a laboratory tubular furnace

Ist Teil von

• Chemosphere (Oxford), 2021-08, Vol.276, p.130175-130175, Article 130175

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2021

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• A kinetic model has been developed for the formation of selected congeners of PCDD/Fs during the thermal decomposition of different wastes in a horizontal reactor. Previously published data on the decomposition of wastes have been correlated using a kinetic model that only considers process parameters, such as the presence of different amounts of oxygen in the atmosphere of reaction, chlorine and metals in the waste. The effect of both chlorine and metals is modelled through an equation assuming a “saturation effect”, i.e., that a certain amount of each substance produces the maximum rate, and that higher amounts do not increase the rate. The presence of oxygen is modelled by a destruction reaction over part of the PCDD/Fs produced. The model, which uses data from more than 64 experiments, correlated the emissions of three selected congeners: 1,2,3,6,7,8-HxCDD, OCDF and 2,3,7,8-TCDF, which are enough to estimate the total amount and toxicity of an emission. •Description of a new model for PCDD/F formation.•Data taken from combustion and pyrolisis of several wastes.•The dependence between PCDD/F congeners reduces the parameters needed by the model.•The model considers process variables such as temperature, O2, Cl and metal ratios.