TITLE:
Bromination of Pd Compounds during Thermal Decomposition of Tetrabromobisphenol A
AUTHORS:
Shunsuke Kuzuhara, Ayaka Sano
KEYWORDS:
Tetrabromobisphenol A, Palladium, Waste Electrical and Electronic Equipment, Bromination, Thermal Processes
JOURNAL NAME:
Engineering,
Vol.10 No.4,
April
30,
2018
ABSTRACT: We conducted thermal tests using the reagent tetrabromobisphenol A (TBBPA) and various Pd compounds to study the chemical forms of Pd obtained during the pyrolytic and oxidative decomposition of TBBPA. Thermal testing was conducted in an electric furnace at temperatures of 280°C - 800°C in an Ar or Ar-O2 (5%) atmosphere for a heating period of 40 min. Scanning electron microscopy-energy dispersive X-ray spectroscopy results revealed that Pd bromide was formed in the mixture of TBBPA and PdO after heating to 450°C in the Ar atmosphere. In addition, thermogravimetry-differential thermal analysis showed that as the heating temperature was increased from 350°C to 730°C, weight loss occurred at a nearly constant rate, indicating that Pd bromide decomposed in this temperature range.