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FBR_Test - Model to investigate the design of a fluidized bed reactor for

biomass conversion to bio-oil and other materials

2013-04-09 DAK

Reactor chamber is based on a 30 gallon barrel (McMaster-Carr 4115T62 for instance)

Barrel measures 18.75 inches OD at top, and is 29.5 inches tall

Height of bed (leaving some freeboard)

H.b 20 in * :

Diameter of bed

D 18.75 in * :

V.b π D 2 / (2^* H.b * :

V.b 0.0905 m 3^*

Volume of bed

A.c π D 2 / (2^* :

A.c 0.1781 m 2^*

Cross sectional Area of the reactor

ρ.c 2650 kg m 3^/ * :

ρ.g 0.59 kg m 3^/ * :

Density of bed material

Density of steam

Intermediate factor

η g ρ.c ρ.g - (* :

Void fraction of bed

ε .37 :

Net Gravitational pressure of the bed

P.bg η 1 ε - (* H.b * :

P.bg 8315.227 Pa *

Sphericity of particles (typically 0.6)

Ψ 0.6 :

Particle diameter

d.p 0.0005 m * :

Gas viscosity

μ 0.00016 poise * :

ε.mf 0.586 Ψ .7 -^* μ 2^ρ.g η * d.p 3^* / (0.029^* ρ.g ρ.c / (0.021^* :

Void fraction at minimum fluidized velocity

ε.mf 0.5422

(A value below 0.4 is suspect)

u.mf Ψ d.p * (2^150 μ * / η * ε.mf 3^1 ε.mf - (/ * :

u.mf 0.3392 m s / *

Minimum fluidization velocity