(380at) Computational Study on Biomass Fast Pyrolysis: Hydrodynamic Effects in a Laboratory-Scale Fluidized Bed
- Conference: AIChE Annual Meeting
- Year: 2019
- Proceeding: 2019 AIChE Annual Meeting
- Group: Particle Technology Forum
- Time: Tuesday, November 12, 2019 - 3:30pm-5:00pm
In this study, we simulate a lab-scale bubbling fluidized bed biomass fast pyrolysis reactor to explore the effects of hydrodynamics on biomass conversion as the gas flow is increased through the bubbling-to-slugging transition, with all the other operating variables held constant. We employ a 3D implementation of MFiX, which is an open-source software package supported by DOE that utilizes a continuum (two-fluid) approach for modeling the fluidzed reactor hydrodynamics. Bubbling intensity and dynamics and the resulting impact on pressure measurements have been reported for a similar reactor set up previously[http://dx.doi.org/10.1016/j.cej.2016.08.113].
We compare mixing and elutriation predictions from our computational model to experimental studies in the literature, as well as experimental pyrolysis yield measurements when reaction chemistry is coupled to the hydrodynamics. We also discuss implications from the results of this study for future numerical and experimental studies of similar reactors.