Abstract
Metal oxides and hydroxides reduce the emission of brominated compounds during pyrolysis of plastics containing brominated
flame retardants (BFR). Calcium hydroxide is very effective when used with legacy BFR but is yet to be tested with novel BFR. This
study investigates the effectiveness of calcium hydroxide in capturing bromine from 2,4,6-tris-(2,4,6-tribromophenoxy)-1,3,5-triazine
(TTBP-TAZ) across a range of pyrolytic temperatures. We combine the thermogravimetric analysis with differential scanning
calorimetry and record infrared spectra of the evolved gases and the solid residues. The results demonstrate significant differences in
the decomposition of TTBP-TAZ with and without Ca(OH)2. The volatilisation of neat TTBP-TAZ proceeds mainly in one dominant
step, whereas that with Ca(OH)2 comprises three stages. Calcium hydroxide captures all HBr produced in the pyrolysis of TTBP-TAZ
and greatly reduces the emission of brominated phenols, capturing 67 % Br initially present in TTBZ-TAZ as CaBr2.
flame retardants (BFR). Calcium hydroxide is very effective when used with legacy BFR but is yet to be tested with novel BFR. This
study investigates the effectiveness of calcium hydroxide in capturing bromine from 2,4,6-tris-(2,4,6-tribromophenoxy)-1,3,5-triazine
(TTBP-TAZ) across a range of pyrolytic temperatures. We combine the thermogravimetric analysis with differential scanning
calorimetry and record infrared spectra of the evolved gases and the solid residues. The results demonstrate significant differences in
the decomposition of TTBP-TAZ with and without Ca(OH)2. The volatilisation of neat TTBP-TAZ proceeds mainly in one dominant
step, whereas that with Ca(OH)2 comprises three stages. Calcium hydroxide captures all HBr produced in the pyrolysis of TTBP-TAZ
and greatly reduces the emission of brominated phenols, capturing 67 % Br initially present in TTBZ-TAZ as CaBr2.
| Original language | English |
|---|---|
| Title of host publication | Australian Combustion Symposium 2023 26-29 November 2023, Darwin |
| Subtitle of host publication | Towards Clean Combustion and Decarbonisation |
| Editors | Bogdan Z. Dlugogorsk, Assaad R. Masri |
| Place of Publication | Darwin |
| Publisher | Charles Darwin University |
| Pages | 118-121 |
| Number of pages | 4 |
| Edition | 1 |
| Publication status | Published - 2023 |
| Event | Australian Combustion Symposium 2023 - Darwin, Australia Duration: 26 Nov 2023 → 29 Nov 2023 https://www.anz-combustioninstitute.org/ACS2023/index.php |
Conference
| Conference | Australian Combustion Symposium 2023 |
|---|---|
| Abbreviated title | ACS2023 |
| Country/Territory | Australia |
| City | Darwin |
| Period | 26/11/23 → 29/11/23 |
| Internet address |
