Work

Performance evaluation of biomass chemical looping gasification in a fluidized bed reactor using industrial waste as oxygen carrier

Year: 2025

Type: article

Abstract: The study investigates biomass chemical looping gasification (BCLG) using nickel smelter slag as an oxygen carrier. Key operating parameters, including reactor temperatures (800-900°C), oxygen-carrier-to-biomass ratio (OCBR, 4:1-15:1), and steam as a gasification medium, were evaluated in a 5kWth fluidized bed reactor using pine forest residue. Performance metrics such as gas composition, carbon conversion and cold gasification efficiency were assessed. Furthermore, fresh, reacted and regenerated oxygen carrier materials were characterized using XRD, BET and SEM-EDS analysis. Optimal performance was achieved at 850°C, an OCBR of 10:1, and a steam-to-biomass ratio of 1.4, with gas composition (H2-38.87, CO-19.65, CO2-34.48, and CH4-6.61vol%), a product gas yield of 1.24 Nm3/kg-biomass, carbon conversion (77.85%), and cold gasification (58.70%) efficiencies. The results suggest that steam addition significantly enhanced char conversion, improving overall BCLG efficiency. Moreover, nickel smelter slag demonstrated stability, consistent reactivity, and limited sintering behavior with no significant reduction and structural alterations.

Source: Bioresource Technology

DOI: 10.1016/j.biortech.2025.132447