Bio-oil hydrodeoxygenation over zeolite-based catalyst: the effect of zeolite activation and nickel loading on product characteristics Saharman Gea, Irvan, Karna Wijaya*, Asma Nadia, Ahmad Nasir Pulungan, Junifa Layla Sihombing, Rahayu, 10.1007/s40095-021-00467-0