(525a) Experimental Study and Aspen Plus Simulation of Chemical Looping Gasification of Woody Chips Using Biochar-Based Oxygen Carrier

It is vital to develop renewable energy due to the environmental issues and fossil fuel resources exhaustion. Biomass which is the fourth largest energy plays an important role in the whole energy system. Chemical looping biomass gasification has shown several advantages such as energy and cost saving, high syngas quality and low tar content. Oxygen carrier development is viewed as one of key issues for chemical looping technology. The iron based oxygen carrier is considered as a promising candidate because of its good stability at high temperature, low cost, non-toxic in nature and environmental friendly. During the process, first biomass is pyrolyzed into gas, tar, and char. The pyrolysis gas (H₂, CO, CH₄, and CO₂) can easily react with oxygen carrier particles because of their Redox properties and good gas–solid contact. Also, the reduced transitional metal oxides such as Fe₂O₃ are good catalysts for biomass tar cracking. As it is very important to enhance the char conversion achieving high gasification efficiency. In this study, biochar based oxygen carrier will be developed to produce high quality syngas. Also, in this research, a comprehensive model will be developed to simulate chemical looping gasification of woodchips using Aspen plus. In this simulation, a temperature-dependent pyrolysis model, extensive gasification kinetics and oxidation-reduction kinetics of oxygen carrier (Fe₂O₃) will be investigated.