Filtern
Erscheinungsjahr
Dokumenttyp
- Vortrag (13)
- Zeitschriftenartikel (11)
- Beitrag zu einem Tagungsband (5)
- Beitrag zu einem Sammelband (3)
- Posterpräsentation (3)
- Sonstiges (1)
- Forschungsbericht (1)
Schlagworte
- Selbstentzündung (5)
- FTIR spectroscopy (4)
- Numerical simulations (3)
- Recyclingstoffe (3)
- Self-ignition (3)
- Smouldering (3)
- Analytik (2)
- Azodicarboxylates (2)
- Biomass (2)
- Brandsimulation (2)
Organisationseinheit der BAM
Eingeladener Vortrag
- nein (13)
Thermoanalytische Untersuchungen von Plasmabeschichteten Polyolefinen mit Flammenschutzeigenschaften
(2015)
A kinetic model of smouldering of pine wood is determined by thermo-gravimetric analysis (TGA), describing the reactions of wood pyrolysis, wood oxidation and char oxidation. Thermo-gravimetric experiments were conducted with constant heating rates ranging from 2.5 to 10 K/min in atmospheres of pure nitrogen and mixtures of nitrogen and oxygen (with 20.5%, 8.2% and 4.3% O2). At first wood pyrolysis and char oxidation experiments are carried out in an independent way. Then smouldering experiments are conducted, which combine the two previous reactions with wood oxidation. Finally, the heats of the reactions are determined by differential scanning calorimetry (DSC). The results are discussed, compared with the literature and the derived kinetic model is presented, which includes five components: three pseudo-components of wood – representing roughly cellulose, hemi-cellulose and lignin – as well as char and ashes.
Fires on waste dumps, surface landfills, Underground stowing or storage facilities of Recycling factories may have multiple harmful effects on individuals on site and on environment.
Possibly several tens of thousands of tons flare up plunging vast areas in smoke and releasing large amounts of flue gases. Experience shows that fire fighting takes days or even weeks and moreover, as long as hidden glowing nests exist fires may break out repeatedly weeks or months later. In the light of this, fire prevention is much easier to manage than extinction. It is of internst to identify the geometrical and physical conditions under which the mid-term or long-term storage of recycling materials can be performed avoiding self-ignition. Our Guideline presents a novel method developed at BAM which combines experimental tests on lab-scale with numerical simulations in Order to obtain permissible geometries of deposits and storage times at which self-ignition can be certainly avoided (Berger 2010).