Whey protein fouling of large pore-size ceramic microfiltration membranes at small cross-flow velocity

2008 ◽  
Vol 323 (1) ◽  
pp. 17-27 ◽  
Author(s):  
S MOUROUZIDISMOUROUZIS ◽  
A KARABELAS
Keyword(s):  
Pore Size ◽  
Flow Velocity ◽  
Whey Protein ◽  
Cross Flow ◽  
Protein Fouling ◽  
Large Pore ◽  
Microfiltration Membranes ◽  
Cross Flow Velocity ◽  
Large Pore Size

Fractionation of whey protein components through a large pore size, hydrophilic, cellulosic membrane

1993 ◽  
Vol 60 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Raj K. Mehra ◽  
William J. Donnelly
Keyword(s):  
Pore Size ◽  
Molecular Mass ◽  
Whey Protein ◽  
Filtration Rate ◽  
Performance Characteristics ◽  
Chemical Compositions ◽  
Protein Solution ◽  
Large Pore ◽  
Protein Permeability ◽  
Large Pore Size

SummaryWhey protein solutions of different chemical compositions were filtered through a large pore size ultrafiltration membrane (molecular mass cut-off 100 kDa). The influences of pH, ionic environment and Ca chelation on the performance characteristics of the membrane (filtration rate, total and individual whey protein permeability) were examined. Increase in pH in the range 5·0-10·0 resulted in a gradual increase in filtration rate and individual whey protein permeability. The presence of Ca in the whey protein solution had a negative effect on the performance characteristics of the membrane. Addition of EDTA to protein solution improved the filtration rate but had no effect on the protein permeation. Fractionation of the low molecular mass whey proteins (β-lactoglobulin and α-lactalbumin) from high molecular mass proteins (bovine serum albumin, lactoferrin and immunoglobulins) was best achieved at pH 8·0.

Large Pore Size Nanoporous Materials from the Self-Assembly of Asymmetric Bottlebrush Block Copolymers

Nano Letters ◽  
2011 ◽  
Vol 11 (3) ◽  
pp. 998-1001 ◽  
Author(s):  
Justin Bolton ◽  
Travis S. Bailey ◽  
Javid Rzayev
Keyword(s):  
Block Copolymers ◽  
Pore Size ◽  
Self Assembly ◽  
Nanoporous Materials ◽  
The Self ◽  
Large Pore ◽  
Large Pore Size

Gradient porosity and large pore size NiTi shape memory alloys

2007 ◽  
Vol 57 (11) ◽  
pp. 1020-1023 ◽  
Author(s):  
Y.P. Zhang ◽  
D.S. Li ◽  
X.P. Zhang
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Pore Size ◽  
Large Pore ◽  
Niti Shape Memory Alloys ◽  
Large Pore Size

Significance of Lorentz Force and Thermoelectric on the Flow of 29 nm CuO–Water Nanofluid on an Upper Horizontal Surface of a Paraboloid of Revolution

2018 ◽  
Vol 141 (2) ◽  
Author(s):  
I. L. Animasaun ◽  
B. Mahanthesh ◽  
A. O. Jagun ◽  
T. D. Bankole ◽  
R. Sivaraj ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Numerical Solutions ◽  
Volume Fraction ◽  
Cross Flow ◽  
Horizontal Surface ◽  
Integration Scheme ◽  
Flowing Fluid ◽  
Paraboloid Of Revolution ◽  
Hall Parameter ◽  
Cross Flow Velocity

Combination of electric and magnetic forces on charged molecules of flowing fluid in the presence of a significant electromagnetic fields on surfaces with a nonuniform thickness (as in the case of upper pointed surface of an aircraft and bonnet of a car which are examples of upper horizontal surfaces of a paraboloid of revolution—uhspr) is inevitable. In this study, the influence of imposed magnetic field and Hall effects on the flow of 29 nm CuO–water nanofluid over such object is presented. Suitable similarity variables were employed to nondimensionalize and parameterize the dimensional governing equation. The numerical solutions of the corresponding boundary value problem were obtained using Runge–Kutta fourth-order integration scheme along with shooting technique. The domain of cross-flow velocity can be highly suppressed when the magnitude of imposed magnetic strength and that of Hall parameter are large. A significant increase in the cross-flow velocity gradient near an upper horizontal surface of the paraboloid of revolution is guaranteed with an increase in the Hall parameter. Enhancement of temperature distribution across the flow is apparent due to an increase in the volume fraction.

scholarly journals SBA-15 with Crystalline Walls Produced via Thermal Treatment with the Alkali and Alkali Earth Metal Ions

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5270
Author(s):  
Sung Soo Park ◽  
Sang-Wook Chu ◽  
Liyi Shi ◽  
Shuai Yuan ◽  
Chang-Sik Ha
Keyword(s):  
Metal Ions ◽  
Pore Size ◽  
Metal Ion ◽  
Pore Diameter ◽  
Earth Metal ◽  
Silica Matrix ◽  
Alkali Earth Metal ◽  
Alkali Earth ◽  
Large Pore ◽  
Large Pore Size

Crystalline walled SBA-15 with large pore size were prepared using alkali and alkali earth metal ions (Na+, Li+, K+ and Ca2+). For this work, the ratios of alkali metal ions (Si/metal ion) ranged from 2.1 to 80, while the temperatures tested ranged from 500 to 700 °C. The SBA-15 prepared with Si/Na+ ratios ranging from 2.1 to 40 at 700 °C exhibited both cristobalite and quartz SiO2 structures in pore walls. When the Na+ amount increased (i.e., Si/Na increased from 80 to 40), the pore size was increased remarkably but the surface area and pore volume of the metal ion-based SBA-15 were decreased. When the SBA-15 prepared with Li+, K+ and Ca2+ ions (Si/metal ion = 40) was thermally treated at 700 °C, the crystalline SiO2 of quartz structure with large pore diameter (i.e., 802.5 Å) was observed for Ca+2 ion-based SBA-15, while no crystalline SiO2 structures were observed in pore walls for both the K+ and Li+ ions treated SBA-15. The crystalline SiO2 structures may be formed by the rearrangement of silica matrix when alkali or alkali earth metal ions are inserted into silica matrix at elevated temperature.

Selective dealkylation of alkyl polycyclic aromatic hydrocarbons towards innovative upgrading process of practical heavy oil

2021 ◽  
Author(s):  
Fumiya Nakano ◽  
Tomohide Goma ◽  
Satoshi Suganuma ◽  
Etsushi Tsuji ◽  
Naonobu Katada
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Pore Size ◽  
Aromatic Hydrocarbons ◽  
Heavy Oil ◽  
Acid Sites ◽  
Polycyclic Aromatics ◽  
Large Pore ◽  
Polycyclic Aromatic ◽  
Long Chain ◽  
Large Pore Size

A silica-monolayer loaded on alumina with weak Brønsted acid sites and large pore size can selectively dealkylate alkyl polycyclic aromatics to long-chain alkanes and polycyclic aromatics for production of chemicals and fuel.

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