Simulation Study on the Enhanced Decarbonization of Flue Gas in Three New Types of Spouted Beds data

Under the dual-carbon strategic framework, this study explores the application of spouted bed technology in CO₂ capture to develop efficient and low-carbon solutions. Addressing inadequate gas-solid radial mixing in conventional spouted beds, we propose three enhanced configurations: a spouted bed with longitudinal vortex generators (SB with LVG), an integral multi-jet spouted-fluidized bed (IMJSFB), and a swirl blade nozzle-equipped spouted bed (SB with SBN). Numerical simulations systematically investigated multiphase flow dynamics, water vaporization, and decarbonization processes. The chemical reaction processes of multiple acidic gases in CSB were also investigated. Results demonstrate that all intensification structures significantly improve particle agitation and water vaporization efficiency, ranked as SB with SBN > IMJSFB > SB with LVG > CSB. Through optimized gas-solid interaction and enhanced heat/mass transfer, these modified systems achieve superior semi-dry flue gas decarbonization efficiencies of 75.13% (SB with LVG), 79.77% (IMJSFB), and 82.59% (SB with SBN), compared to 72.46% in CSB. The presence of reduced the decarbonization efficiencies to 47.7%, representing a decrease of 34.17%.