Pyrolysis in porous media: Part 1. Numerical model and parametric study

Modeling the impact of bubbling bed hydrodynamics on tar yield and its fluctuations during biomass fast pyrolysis

“…Compared with time-consuming and costly experiments, multi-phase CFD is able to provide detailed information on the spatiotemporal variations in species concentrations, flows, and temperatures within the reactor with reduced effort and developing circle. This makes CFD a promising platform to account for physical relationships that are beyond the capability of direct experimental measurements [7][8][9][10][11][12][13][14][15]. To make sure that the simulated reactor conditions were relevant, we based the simulations in the present study on an experimental laboratory-scale bubbling fluidized-bed pyrolyzer located at Iowa State University [16].…”

“…Because the potential output of bio-oil is directly dependent on the initial pyrolysis tar yield and composition, there is considerable interest in experimental [4][5][6][7][8] and computational [9][10][11][12][13][14][15][16][17][18][19][20][21][22] investigations of how tar yield is affected by the biomass type and also by the employed conditions for pyrolysis. This interest should include both the mean tar yield as well as its variability, since large fluctuations in the condensable hydrocarbon stream used for catalytic upgrading would significantly complicate the process control.…”

Prediction of transient chemistry effect during fuel pyrolysis on the pressure drop through porous material using artificial neural networks

“…The aero-thermal loads must be thus addressed to quantify permeability/porosity fluctuations of materials as a function of operating conditions. In the literature, different studies are found in relationship with this need, experimentally [3][4][5] or numerically [6,7]; even mathematically [8]. Such studies are not only dedicated to the flow description but also to the heat transfers [9][10][11].…”

“…But only few are dedicated to both high temperature and high pressure conditions in case of reactive fluid. Numerous equations (derived from Brinkman's equation) which relate the pressure drop (ΔP=P in -P out ) through the porous material to the through-flow velocity have been published [4,6]. They are based on coefficients, whose physical meaning is not evident [4].…”

Combustion and Thermal Characteristics of Korean Wood Species

“…It is proposed that this is because Manchurian ash has wider pores compared to the other species. Romagnosi et al (2013) reported that the heat absorbing characteristics of the materials is due to pores within the materials. bioresources.com Seo et al (2016).…”