Nazarudin, N., Ishak, P.M. and Afrida, A. 2022. Catalytic Cracking of Plastic Waste Polypropylene for Gasoline Production Using H-USY and Cr-USY : Catalytic Cracking of Polypropylene . Jurnal Bio-Geo Material Dan Energi. 2, 2 (Sep. 2022). DOI:https://doi.org/10.22437/bigme.v2i2.31969.