Oxy-fuel combustion in fluidized beds for CO2 capture: Recent advancements in CFD modeling
Guoqing Lian, Qin‐Wen Liu, Yi Liu, Yiwei Zhang, Wenqi Zhong
Abstract
Computational Fluid Dynamics (CFD) has become an indispensable tool for advancing the understanding and development of oxy-fuel fluidized bed combustion (Oxy-FBC) systems. Over recent decades, substantial progress in CFD modeling has yielded valuable insights into the complex physicochemical behavior of Oxy-FBC processes, thereby supporting both fundamental research and industrial-scale applications. This review provides a comprehensive overview of the current state of CFD modeling in Oxy-FBC, serving as a key reference for researchers and engineers involved in the CFD-assisted design, optimization, and scale-up of these systems. In addition to synthesizing findings from the broader body of literature, the review highlights extensive contributions from the authors' research group, which has been actively engaged in this area over the past decade. The paper discusses essential sub-models governing multiphase flow, heat and mass transfer, and chemical reactions, and evaluates the application of both Eulerian-Eulerian and Eulerian-Lagrangian frameworks across different modeling scales. Furthermore, it assesses the strengths and limitations of various modeling approaches, identifies critical research gaps, such as the need for improved thermochemical sub-models and expanded validation efforts, while outlining future research directions. The aim is to provide a thorough understanding of CFD modeling in Oxy-FBC and to guide future research efforts in advancing this technology.