کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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156869 | 456951 | 2011 | 10 صفحه PDF | دانلود رایگان |
This work discusses applications of analytical photocentrifuge LUMiSizer for estimation of the low-pressure compression–permeability characteristics of aqueous calcium carbonate sediments. Two approaches for estimation of compressibility–permeability parameters were tested. These approaches are based on (1) analysis of equilibrium height of sediment H∞ versus centrifugal rotation speed Ω and (2) analysis of kinetic curves of the consolidation ratio U(t) at different rotation speeds Ω. The approach (1) allowed fair fitting of experimental H∞ (Ω) data with parameters pa=70.9±0.9 Pa and β=0.1777±0.0005 in Tiller's equation relating the volume fraction φ and solid pressure ps. The two independent approaches (1) and (2) evidenced the presence of the scaling law relating consolidation coefficient C and solid pressure ps, C∝psγ with the similar exponents γ≈0.85±0.03 (for the studied solid pressure region 5 kPa≤ps≤75 kPa).
Journal: Chemical Engineering Science - Volume 66, Issue 6, 15 March 2011, Pages 1296–1305