Co-gasification of crude glycerol with lignocellulosic biomass for enhanced syngas production

The present work concerns the co-gasification of crude glycerol (CG), a by-product of biodiesel industry, with locally available lignocellulosic biomass aiming at the production of syngas and further promotion of power production in dedicated bioenergy units. Co-gasification of CG with olive kernel (OK), an agro-residue issued from the intensive olive oil production sector in Southern East Europe, was performed in a laboratory fixed bed reactor at T = 750–850 οC with λ = 0.2–0.4 and in the three different mixing levels of 24 wt%, 32 wt% and 49 wt% of CG in OK. Co-gasification of CG with OK found to favor the gas yield which increased from 0.4 to 1.2 Nm3/kg for the mixture of 49 wt% of CG in biomass. Additionally H2 concentration increased from 19 to 33%(v/v) in the gasification gas while the tar yield decreased from 19.5 to 2.4 wt% at conditions of T = 850 οC and λ = 0.4.