Upgrading of Rice Straw Bio-Oil Using 1-Butanol over ZrO 2 -Fe 3 O 4 Bimetallic Nanocatalyst Supported on Activated Rice Straw Biochar to Butyl Esters. - Ibrahim, Alhassan; Elsayed, Islam; Hassan, El Barbary (Catalysts (2073-4344), 2024)