Industrial solid waste as oxygen carrier in chemical looping gasification technology: A review

Chemical looping gasification is an innovative gasification method in which oxygen carrier plays a crucial role. In line with the principles of the "green circular economy," researchers have proposed using industrial solid waste as the oxygen carrier in chemical looping technology. To address the gaps in previously published works, this review aims to summarize the current state of research on the use of industrial solid wastes as oxygen carriers, focusing on the feasibility, process control and reaction mechanism. Based on the current state of research, four recommendations are made for further research on industrial solid waste as an oxygen carrier. Firstly, when bulk industrial solid waste is used as an oxygen carrier, it can be considered not to regenerate. Next, it is necessary to consider the subsequent resource utilization methods of the slag from chemical looping gasification to avoid turning solid waste into "solid waste" again. Then, multiple solid wastes can be used as oxygen carriers to improve reaction performance and avoid the disadvantages of individual active ingredients. Finally, when solid waste is used as an oxygen carrier, it is necessary to pay attention to the migration and transformation of secondary components.