Catalytic Microwave Assisted Pyrolysis of Abs-Br Using Fe/Sic: Accelerating Approach to Recycle Value Added Aromatics

Catalytic microwave-assisted pyrolysis of waste ABS-Br was carried out using SiC and Fe/SiC to investigate the pyrolytic oil yield and aromatics recovery. Response surface methodology coupled with Box–Behnken design (RSM-BBD) was applied to optimization of the pyrolysis. Four parameters (microwave power, final temperature, carrier gas flow rate and receptor/plastic ratio) was tested and reduced-quadratic model was best fitted to the experimental data. The optimal values found to be at a temperature of 471°C, a microwave power of 1.54 amps, carrier gas flow rate of 215 mL/min and catalyst/plastic weight ratio of 0.05. Under such conditions, 56.97% of ABS was recovered as oil. The liquid fractions were characterized using quantitative GC–MS analysis showed high concentration of single ring aromatics (62% when SiC used as catalyst). The impregnation of Fe to SiC showed higher catalytic activity in conversion of PAHs to single ring aromatics (82% wt. of oil) and also higher fixation of bromine compounds (over 99% adsorbs).