The Debrominated and Lightweight Oil generated from Two Stage Pyrolysis of WPCBs by Using Compound Chemical Additives

Abstract The effect of employing compound additives were investigated for application to the catalytic pyrolysis of waste printed circuit boards (WPCBs), in order to recycle low brominated and lightweight oils. The study included the analysis of three-phase product yields; organic and inorganic bromine distributions; oil content; and the boiling point of experimental product fractions. Bromine distributions were analyzed using ion chromatography (IC) and oxygen bomb calorimeter, with oil products analyzed using gas chromatography-flame ionization (GC/FID) and gas chromatography-mass spectrometry(GC/MS). Results show that the pyrolysis liquid up to 27.04 wt.% by using CaCO 3  + 4A; the total bromine content(include organic and inorganic) of pyrolysis liquid was reduced to 4.68 wt.% through Fe 3 O 4  + 4A; Using Fe 3 O 4  + Al 2 O 3 can increase the water content(68.76 wt.%) of pyrolysis liquid; the application of Fe 3 O 4  + 4A can cut down the organic bromine to 1.59 wt.%; Fe 3 O 4  + 5A can increase the 150–200 °C fraction(gasoline) to 53.25%; the phenol fraction can be increased to 46.01% applied Fe 3 O 4  + 5A; the bromophenol less than1.30% and bisbromophenol was not detected. Thererfore, using Fe 3 O 4  + 5A to recycle the low brominated and lightweight pyrolysis oil have a huge significance,which can use as potential fuel.