| Abstract | The rapid increase of disposable plastic products, and consequently the increase of plastic pollution, has become one of the main environmental issues. Thermal conversion can convert the end-use plastics to a source of energy and materials. In this work, the effects of homogeneous catalyst-alkali metal (such as KOH, NaOH, Na₂CO₃, KHCO₃, K₂CO₃, etc.), heterogeneous catalysts-transition metal (Ni, Ru, other metal catalysts), and activated carbon on hydrothermal gasification of automotive fluff and glycerin as challenging residues, especially to H₂, have been investigated in a batch autoclave reactor at 625 K, 3600 s. While selectivity toward CO₂ was higher in the presence of heterogeneous catalysts, more H₂ formed in the presence of alkaline catalysts. The maximum H₂ yield reached 60.47 mol/Kg_fluff in the presence of NaOH. This process is beneficial to the plastics that cannot be recycled, and are contaminated by a compound such as food. |
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