LIGNOCELLULOSIC MATERIALS OLEFINATION HUMINS BIOMASS TECHNO-ECONOMIC AND ENVIRONMENTAL ASSESSMENT PROCESS DEVELOPMENT BIORREFINERY WITTIG REACTION HUMINS VALUATION BIOREFINERY HYDROLYSATE FURFURAL GAMMA-VALEROLACTONE FLOWSHEET ETHYL LEVULINATE BIOMASS CONVERSION SUGAR CANE BAGASSE SUGAR CANE PROCESSING OPTIMIZATION GREEN CHEMISTRY KINETICS NICKEL RECOVERY PROCESS HYDROGEN SUGARCANE BAGASSE SUGAR CANE MOLASSES ALKENOIC ACIDS BIOMASS HYDROLYSATE RECUPERATION PROCEESS PROCESS EVALUATION CATALYST