Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: Determination of stable operating conditions

The performance of both fluidized and spouted bed reactors in the pyrolysis waste plastics is conditioned by particle agglomeration phenomena, which worsens quality gas–solid contact eventually lead to defluidization. objective this work determine optimum conditions for stable operation (without defluidization) a bench scale plant fitted with fountain confined conical reactor equipped nonporous draft tube, operates continuous mode. insertion these devices enhances contact, especially region, leads highly hydrodynamic regime, features being especial relevance situ catalytic plastics. This paper deals effect different variables have on minimum temperature avoiding analyzed are as follows: plastic type (HDPE, LDPE, PP, PS, PET PMMA), feed rate, mass inert material bed, spouting velocity use catalyst. results show that polymers whose chains decompose at low temperatures or high degrees branching require operating temperatures. Besides, ratio rate (Wbed/Qplastic) and/or were increased, required avoid defluidization was also reduced. catalyst reduced operation, activation energy cracking reactions greatly reduced, so reaction increased.