Parametric study via full factorial design for glycerol supercritical gasification

Houcinat Ibtissem (1) , Outili Nawel (1) , Elsa Weiss-Hortala (2) , Meniai Abdeslam-Hassen

1 University of Constantine
2 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement

Supercritical water gasification is a promising technology for pollution treatment and syngas pro- duction from biomass. The produced gas is composed of hydrogen, carbon dioxide, methane, car- bon monoxide and traces of ethane and other light hydrocarbons. This work aims to give a comprehensive experimental study of the supercritical water gasification of glycerol using a full factorial design of experiments (DOE). The effect of five factors, namely: temperature [458°C–542°C], residence time [40–90min], pressure [23–27MPa], initial concentration of glycerol [10–19wt%] and KOH catalyst quantity [0.60–1.475wt%], were investigated on several responses such as the gasification efficiency (GE), syngas composition and lower calorific value (LCV) of the produced gas. First order mathematical models correlating each considered response in terms of the considered factors were developed and validated. Also, the significance of the factors effect was validated using analysis of variance. The results showed that the produced gas composition and quality were strongly influenced by temperature and initial concentration. The largest gas pro- duction was detected at a temperature of 542°C, a residence time of 40min, a pressure of 27MPa, a concentration of 10 wt% glycerol and a KOH catalyst percentage of 1.475 wt%.

Mots clés: supercritical water gasification; lower calorific value; hydrogen production; Full factorial design; gasification efficiency; glycerol

Domaines: Sciences de l'ingénieur [physics]

Houcinat Ibtissem, Outili Nawel, Elsa Weiss-Hortala, Meniai Abdeslam-Hassen. Parametric study via full factorial design for glycerol supercritical gasification. Biofuels, 2022, 13 (3), pp.265-278. ⟨10.1080/17597269.2019.1675270⟩. ⟨hal-02320860⟩