ENERGY VALORISATION OF SOLID AGRI-FOOD IN ALGERIA

Abstract

This research explores the potential of utilizing date palm waste, an abundant biomass resource in Algeria, as a sustainable feedstock for gasification and methanol production. The study begins by identifying the most prominent biomass resources in Algeria, emphasizing the importance of agricultural residues for renewable energy applications. Among these, date palm waste from the Biskra region was selected as a representative sample due to its significant availability and high potential for valorisation. The methodological approach combines experimental data from the literature with advanced process simulation using Aspen Plus software. This comprehensive modelling framework facilitates the analysis of key operating parameters, such as the steam-to-biomass ratio and gasification temperature, to optimize the gasification process and subsequent methanol synthesis. The model's reliability is confirmed through rigorous validation against experimental results reported in prior studies. Key findings from this study indicate that the optimal conditions for steam gasification of date palm waste are achieved at a steam to biomass ratio of 0.9 and a gasification temperature of 800 °C. Under these conditions, the resulting syngas composition comprises 58.38% hydrogen (H2) and 24.21% carbon monoxide (CO). Additionally, the study reveals that the ideal conditions for methanol synthesis involve operating at a pressure of 50 bar and a temperature of 220 ◦C, resulting in a methanol Production capacity of 368.98 kg/h. This study underscores the potential of leveraging Algeria's biomass resources for sustainable energy production, aligning with the goals of the “REFFECT AFRICA” project. By integrating simulation-based optimization with practical applications, the findings contribute to advancing renewable energy technologies and promoting sustainable development in the region.