Catalytic pyrolysis of polyolefin waste into valuable hydrocarbons over reused catalyst from refinery FCC units

Influence of FCC catalyst steaming on HDPE pyrolysis product distribution

“…Therefore, the use of equilibrated fluid catalytic cracking (FCC) catalysts in the pyrolysis process would be economically advantageous, as the FCC process generates huge quantities of spent catalyst that is still active for other processes. There are a number of studies dealing with the pyrolysis of different kinds of plastics (low density polyethylene, high density polyethylene (HDPE), polypropylene, polystyrene and their mixtures) over FCC catalysts, in thermobalance [17,18], batch reactors [16,19,20], fixed bed reactors [21] and fluidized bed reactors [22][23][24].…”

TGA-DSC: A Screening Tool for the Evaluation of Hydrocracking Catalyst Performance

“…Degradation of PP under different heating rates and carries gases reported in literature [23] [24] [27] [28]. Polymers are long chain macromolecules with high viscosity during degradation, it is assumed that the polymer macromolecules break down initially at the exterior of catalyst surface and then small fragments enter into the inner pore structure of catalyst to undergo further reactions [29].…”

Thermal and catalytic degradation of pyrolytic oil from pyrolysis of municipal plastic wastes

“…Here, the coke and inorganic material included in the product oil can be easily removed by physical treatment [8]. However, the low-grade oil requires the change of chemical structure and needs thermal and catalytic degradation technology [9][10][11][12]. In the case of catalytic degradation, the most commonly used catalysts are solid acid catalysts such as zeolite, silicaalumina, fresh FCC catalyst and MCM-41, etc.…”