Analysis of phenol production technology from the waste of empty palm oil bunches: A review of methods and process efficiencyErwan Adi Saputro, Azil Bahari Alias, Silvana Dwi Nurherdiana, Rahaju Saraswati, Dessy Ariyanti, Erda Roriza Putri Redina and Niken Febrila AwardaniE3S Web Conf., 605 (2025) 03045DOI: https://doi.org/10.1051/e3sconf/202560503045