A kinetic study of the thermal deco

A kinetic study of the thermal decomposition of a mobile phone case has been carried out under different conditions by thermogravimetry. Several experiments were performed in a nitrogen atmosphere (pyrolysis runs) and also in an oxidative atmosphere with two different oxygen concentrations (10% and 20% oxygen in nitrogen). Dynamic runs and dynamic + isothermal runs have been carried out to obtain much decomposition data under different operating conditions. Moreover some TG–MS runs were performed in order to better understand the thermal decomposition of a mobile phone case and identify some compounds emitted during the controlled heating of this material. A scheme of two independent reactions for pseudocomponents has been proposed for the pyrolysis process. For the combustion runs, the scheme proposed includes two pyrolytic reactions competing with other two reactions with formation of an intermediate residue, and finally the reaction of oxidation/burning of the intermediate residue.Furthermore, pyrolysis and combustion runs at 500 °C in a horizontal laboratory furnace were carried out. More than 50 compounds, including carbon oxides, light hydrocarbons, and polycyclic aromatic hydrocarbons (PAHs) have been identified and quantified. The main semivolatile compounds detected were phenol and styrene. Furthermore, polychlorodibenzo-p-dioxin and polychlorodibenzofurans (PCDD/Fs) and dioxin-like PCBs produced were analyzed. In the combustion run, PCDDs were obtained in higher amounts than PCDFs and HxCDD was the most emitted homologue.

A kinetic study of the thermal decomposition of a mobile phone case has been carried out under different conditions by thermogravimetry. Several experiments were performed in a nitrogen atmosphere (pyrolysis runs) and also in an oxidative atmosphere with two different oxygen concentrations (10% and 20% oxygen in nitrogen). Dynamic runs and dynamic + isothermal runs have been carried out to obtain much decomposition data under different operating conditions. Moreover some TG-MS runs were performed in order to better understand the thermal decomposition of a mobile phone case and identify some compounds emitted during the controlled heating of this material. A scheme of two independent reactions for pseudocomponents has been proposed for the pyrolysis process. For the combustion runs, the Scheme Proposed includes Two pyrolytic reactions competing with Other Two reactions with Formation of an Intermediate residue, and finally the Reaction of oxidation / Burning of the Intermediate residue.

Furthermore, pyrolysis and combustion runs at 500 ° C in a horizontal. laboratory furnace were carried out. More than 50 compounds, including carbon oxides, light hydrocarbons, and polycyclic aromatic hydrocarbons (PAHs) have been identified and quantified. The main semivolatile compounds detected were phenol and styrene. Furthermore, polychlorodibenzo-p-dioxin and polychlorodibenzofurans (PCDD / Fs) and dioxin-like PCBs produced were analyzed. In the combustion run, PCDDs were obtained in higher amounts than PCDFs and HxCDD was the most emitted homologue.

A kinetic study of the thermal decomposition of a mobile phone case has been carried out under different conditions by. Thermogravimetry. Several experiments were performed in a nitrogen atmosphere (pyrolysis runs) and also in an oxidative. Atmosphere with two different oxygen concentrations (10% and 20% oxygen in nitrogen). Dynamic runs and dynamic + isothermal. Runs have been carried out to obtain much decomposition data under different operating conditions. Moreover some TG - MS runs. Were performed in order to better understand the thermal decomposition of a mobile phone case and identify some compounds. Emitted during the controlled heating of this material. A scheme of two independent reactions for pseudocomponents has been. Proposed for the pyrolysis process. For the combustion runs the scheme, proposed includes two pyrolytic reactions competing. With other two reactions with formation of an, intermediate residue and finally the reaction of oxidation / burning of the. Intermediate residue.Furthermore pyrolysis and, combustion runs at 500 ° C in a horizontal laboratory furnace were carried out. More than, 50 compounds. Including carbon oxides light hydrocarbons, and polycyclic, aromatic hydrocarbons (PAHs) have been identified and, quantified. The main semivolatile compounds detected were phenol and styrene. Furthermore polychlorodibenzo-p-dioxin and, polychlorodibenzofurans. (PCDD / Fs) and dioxin-like PCBs produced were analyzed. In the, combustion run PCDDs were obtained in higher amounts than. PCDFs and HxCDD was the most emitted homologue.