Oil Palm Empty Fruit Bunch (OPEFB) Pretreatment Simulation with Ammonia Soaking and Ammonia Expansion Method for Levulinic Acid and Furfural ProductionMuryanto, Iffa Karimah, Andri Josua Sianipar, Fabio Carisma Handita, Hasna Nisrina Sumayyah, Maria Gabriella, Nadhira Alifa, She Lizanoer Alviora, Widya Rahmanisa Fitri, Yahya Abdurachim, Heri Hermansyah, Yanni Sudiyani and Misri GozanE3S Web Conf., 503 (2024) 04007DOI: https://doi.org/10.1051/e3sconf/202450304007