Co-pyrolysis of Oil Palm Fronds (OPF) and Polypropylene Plastic (PP) Using NiCu/CaO Catalyst for Bio-oil ProductionNurfatihayati Nurfatihayati, Panca Setia Utama, Padil Padil, Yelmida Azis, Sunarno Sunarno, Suhendri Suhendri and Jordi FikriE3S Web Conf., 678 (2025) 02003DOI: https://doi.org/10.1051/e3sconf/202567802003