Baffle effects on performance of catalytic circulating fluidized bed reactor

Performance evaluation of high density riser and downer: Experimental study using ozone decomposition

“…8 displays the relationship between overall conversion and the solids holdup in the riser and downer reactors. Generally, the conversion of ozone increases with the solids holdup, as confirmed by other researchers [9,29,30]. There appears to be a linear relationship between the total ozone conversion and the mean solids holdup in both riser and downer reactors.…”

“…As a comprehensive predictive model for the CFB reactor is not available, it is helpful to choose two typical ideal reactor models: a plug-flow reactor (PFR) and the continuous stirred-tank reactor (CSTR) as the basis to evaluate the downer performance. The conversions for PFR and CSTR have been given by Jiang et al [29] in terms of Damköh-ler number: For PFR:…”

High-fidelity simulation of the 3-D full-loop gas–solid flow characteristics in the circulating fluidized bed

“…For a long time, lots of the experiments related to the CFB have been conducted. Plenty of valuable information have been obtained to understand the gas-solid flow characteristics in the CFB, such as the core-annulus structure (Chew et al, 2012;You et al, 2008;, the cluster characteristics (McMillan et al, 2013;Yang and Leu, 2009), the solid velocity distribution (Pantzali et al, 2013;Yan and Zhu, 2005), the hydrodynamic similarity (Qi et al, 2008), the effect of internal device on solid distribution (Guío-Pérez et al, 2013;Jiang et al, 1991;Samruamphianskun et al, 2012), the particle resident behavior (Harris et al, 2003), and so on.…”

Hydrodynamic characteristics of bubbles in bubbling fluidized bed with internals

“…The main features of baffles are that they allow the enhancement of gas and solid heat and mass transfer, decrease in elutriation, and improvement of the radial bubble distribution [3]. According to Jiang et al [4], Zheng et al [5,6], and Zhu et al [7], baffles improve the bed voidage by breaking bubbles, as well as increased mixing and contact efficiency between the gas and solid, thereby improving the reactivity.…”