Effects of the Types and Addition Amounts of Sludge on the True Rheological Properties of Petroleum Coke Slurry Flowing in Pipelines
-
Meng Liu
,
Yufeng Duan
Abstract
Effects of the types and addition amounts of sludge on the true rheological properties of petroleum coke water/sludge slurry (PCWS/PCSS) flowing in pipelines were investigated using the Tikhonov regularization method. Results show that PCWS of 59.8 wt% changes from pseudo-plastic fluid to dilatant fluid as the shear rate increases. However, PCWS of 63.4 wt% is a very complex fluid: shear thinning at low shear rate, followed by shear thickening over a critical shear rate, and a subsequent shear thinning at high shear rate. Rheological properties of PCWS have a significant change after the sludge was added. PCSS changes from dilatant fluid to pseudo-plastic fluid when the addition amounts of sewage sludge ascend to 10 wt%. Petroleum coke particles are trapped by the stable “network” structures, which are formed by flocculent sludge particles. The wall slip velocity of PCSS is higher than that of PCWS with the sludge amount increases, which is beneficial for pipe transportation. In addition, the wall slip velocity of PCSS containing sewage or petrochemical sludge increases with the wall shear rate increases, but the slip velocity of PCSS containing paper mill sludge first increases and then decreases.
Funding statement: Funding: The research was supported by the National Science Foundation of China (No.51206028), the National Basic Research Program of China (973 Program, 2010CB227001) and China Postdoctoral Science Foundation (2012M520971).
Nomenclature
- D
Diameter of pipeline (m)
- L
Length of pipeline (m)
- ΔP
Pressure drop (Pa)
- Q
Total volumetric flow rate (m3/s)
- Qs
Slip volumetric flow rate (m3/s)
- Qc
Center volumetric flow rate (m3/s)
- R
Radius of pipeline (m)
- S1
Sum of the squares of the deviation (dimensionless)
- S2
Second derivatives of the two unknown functions at the split point (dimensionless)
- V
Velocity (m/s)
- Vslip
column vector of slip velocity (dimensionless)
- us
Slip velocity (m/s)
- uc
Center velocity (m/s)
- uslip (τw)
Unknown function of slip velocity (m/s)
- Greek letters
Experimental wall shear stress (Pa)
Experimental apparent shear rate (s−1)
- γ(τw)
Unknown function of shear rate (s−1)
- δi
Fractional deviation (dimensionless)
- λ
Regularization parameter (dimensionless)
- ηa
Apparent true shear viscosity (mPa s)
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©2015 by De Gruyter
Articles in the same Issue
- Frontmatter
- Reviews
- Fischer–Tropsch Synthesis in Slurry Bubble Column Reactors: Experimental Investigations and Modeling – A Review
- Computational Fluid Dynamics-Based Hydrodynamics Studies in Packed Bed Columns: Current Status and Future Directions
- Research Articles
- Optimized Modular Design and Experiment for Staggered Herringbone Chaotic Micromixer
- Effects of the Types and Addition Amounts of Sludge on the True Rheological Properties of Petroleum Coke Slurry Flowing in Pipelines
- Stabilization of Fast Pyrolysis Oil Derived from Wood through Esterification
- CO2 Sorption by Hydrotalcite-Like Compounds in Dry and Wet Conditions
- Experimental Tests with Rice Straw on a Conical Square-Based Spouted Bed Reactor
- Kinetics for an Optimized Biosynthesis of Silver Nanoparticles Using Alfalfa Extracts
- Assessing the Feasibility of Optical Probe in Phase Holdup Measurements and Flow Regime Identification
- Modeling Study of Crude Oil Enhanced Removal in a Two-Liquid Phase Partitioning Bioreactor
- Application of Deep Eutectic Solvent (DES) as a Reaction Media for the Esterification of Acrylic Acid with n-Butanol
- Transesterification of Degummed Jatropha curcas Oil Using Tri-potassium Phosphate as Base Catalyst
- Process Intensification for Production of Ethyl Lactate from Fermentation-Derived Magnesium Lactate: A Preliminary Design
- A Study on the Production of Isophthalic Acid from M-xylene under the Catalysis of Cobalt and H3PW12O40/Carbon Modified by HNO3 Solution
- Statistical Medium Optimization for the Increased Production of Recombinant Phytase in the Fed-Batch Cultivation of Pichia pastoris
- Catalytic Degradation of Pyrrole in Aqueous Solution by Cu/SBA-15
Articles in the same Issue
- Frontmatter
- Reviews
- Fischer–Tropsch Synthesis in Slurry Bubble Column Reactors: Experimental Investigations and Modeling – A Review
- Computational Fluid Dynamics-Based Hydrodynamics Studies in Packed Bed Columns: Current Status and Future Directions
- Research Articles
- Optimized Modular Design and Experiment for Staggered Herringbone Chaotic Micromixer
- Effects of the Types and Addition Amounts of Sludge on the True Rheological Properties of Petroleum Coke Slurry Flowing in Pipelines
- Stabilization of Fast Pyrolysis Oil Derived from Wood through Esterification
- CO2 Sorption by Hydrotalcite-Like Compounds in Dry and Wet Conditions
- Experimental Tests with Rice Straw on a Conical Square-Based Spouted Bed Reactor
- Kinetics for an Optimized Biosynthesis of Silver Nanoparticles Using Alfalfa Extracts
- Assessing the Feasibility of Optical Probe in Phase Holdup Measurements and Flow Regime Identification
- Modeling Study of Crude Oil Enhanced Removal in a Two-Liquid Phase Partitioning Bioreactor
- Application of Deep Eutectic Solvent (DES) as a Reaction Media for the Esterification of Acrylic Acid with n-Butanol
- Transesterification of Degummed Jatropha curcas Oil Using Tri-potassium Phosphate as Base Catalyst
- Process Intensification for Production of Ethyl Lactate from Fermentation-Derived Magnesium Lactate: A Preliminary Design
- A Study on the Production of Isophthalic Acid from M-xylene under the Catalysis of Cobalt and H3PW12O40/Carbon Modified by HNO3 Solution
- Statistical Medium Optimization for the Increased Production of Recombinant Phytase in the Fed-Batch Cultivation of Pichia pastoris
- Catalytic Degradation of Pyrrole in Aqueous Solution by Cu/SBA-15
