Co-pyrolysis of oil palm empty fruit bunches (EFB) biochar with high-density polyethylene (HDPE) for liquid fuel productionSunarno Sunarno, Padil Padil, Anisa Mutamima, Nurfatihayati Nurfatihayati, Johan Sitanggang, Viccy Wando Aritonang and Panca Setia UtamaE3S Web Conf., 593 (2024) 09002DOI: https://doi.org/10.1051/e3sconf/202459309002