Producing Bio-Oil from Coconut Shell by Fast Pyrolysis Processing Dewi Selvia Fardhyanti, Megawati, Cepi Kurniawan, Retno Ambarwati Sigit Lestari and Bayu Triwibowo MATEC Web Conf., 237 (2018) 02001 Published online: 26 November 2018 DOI: 10.1051/matecconf/201823702001