Fixed Bed Extractor Design Parameters
Calculates operating cycle time, fluid velocity, pressure drop, Weibull extraction kinetics, and concentration yields for percolation battery extraction columns.
📖 Need the theory? Read the methodology, assumptions, and equations in the full reference guide.
1. Define Input Parameters
2. Engineering Output
Bed Cross-Sectional Area (A_bed)
- m²
- m²
Bed Aspect Ratio (L/D) (L_D_ratio)
- -
- -
Cycle Time (t_c)
- h
- h
Switching Frequency (f)
- 1/h
- 1/h
Total Extraction Time (t_extract)
- h
- h
Solvent-to-Feed Ratio (SF)
- -
- -
Superficial Velocity (u_s)
- m/s
- m/s
Interstitial Velocity (u_i)
- mm/s
- mm/s
Pressure Drop (delta_P)
- bar
- bar
Extraction Yield (Y)
- -
- -
Extract Production Rate (m_dot_extract)
- kg/h
- kg/h
Extract Concentration (C)
- w/w
- w/w
Need this calculation offline?
Download Offline Excel CalculationContext & Assumptions
Fixed bed extractors operate as quasi-continuous percolation batteries to extract soluble compounds from porous solid matrices, such as coffee grounds. Hydraulic performance, superficial fluid velocity, and pressure drop across the packed bed govern mass transfer kinetics and overall yield. Sizing and operational design require balancing residence time against dynamic pressure limits and bed hydraulic constraints.
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