Renewable energy and alternative fuel from different conventional resources such as biomass, plastic waste, and recyclable polymers are impertinent environmental issues worldwide. Furthermore, to replace fossil fuel and reduce greenhouse gas emissions that have a negative impact on climate change. This article exhibits the effect of metal oxide composite/clay in the thermal decomposition of Polypropylene. That hetrocatalyst composed nano-clay thin layer loaded with MnO2 –NPs works on cracking of polypropylene under different reaction conditions like heating temperature, rate of reaction, reaction time, and composite loading ratio. Various techniques such as GC and TEM were used to characterize pyrolysis gases and char, in addition to scanning electron microscopy (SEM), Fourier transform infrared (FTIR), Thermo-gravimetric analyzer (TGA), and X-ray diffraction (XRD) were used for composite characterize. High gas yield and char rate conversion were obtained using synthesize composite.