The study explores sorption-enhanced co-gasification (SECG) of food waste (FW) and polypropylene (PP) utilizing cerium oxide-supported nickel catalysts, calcium-based materials as CO2 sorbents, and steam to generate hydrogen-rich gas. Results indicated a synergistic effect during FW/PP co-gasification, leading to enhanced cracking reactions and increased gas yield. Incorporating promoters like molybdenum or iron into the nickel catalysts improved gas yield and hydrogen selectivity. Moreover, increasing the FW/PP ratio further boosted hydrogen-rich gas production. The use of calcined dolomite demonstrated a substantial increase in gas yield and hydrogen selectivity compared to typical co-gasification. Overall, the study highlights the effectiveness of SECG in enhancing hydrogen production from food waste and polypropylene, supporting waste management and sustainable energy initiatives. Gasification, catalyst optimization, and the utilization of CO2 sorbents play crucial roles in achieving high hydrogen content in the generated gas, making this approach a promising eco-friendly solution for addressing global waste management challenges.