Rheology assessment of cellulose acetate spinning solution and its influence on reverse osmosis hollow fiber membrane performance

2003 ◽  
Vol 22 (3) ◽  
pp. 319-325 ◽  
Author(s):  
Ani Idris ◽  
A.F. Ismail ◽  
S.A. Gordeyev ◽  
S.J. Shilton
Keyword(s):  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Membrane Performance

Fouling indices for low pressure hollow fiber membrane performance assessment

2011 ◽  
Vol 45 (8) ◽  
pp. 2627-2637 ◽  
Author(s):  
Anh H. Nguyen ◽  
John E. Tobiason ◽  
Kerry J. Howe
Keyword(s):  
Performance Assessment ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Low Pressure ◽  
Fiber Membrane ◽  
Membrane Performance

Twisted hollow fiber membrane modules for reverse osmosis-driven desalination

Desalination ◽  
2018 ◽  
Vol 441 ◽  
pp. 21-34 ◽  
Author(s):  
Mustafa Usta ◽  
Michael Morabito ◽  
Ali Anqi ◽  
Mohammed Alrehili ◽  
Alaa Hakim ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Membrane Modules

scholarly journals Cellulose Acetate Hollow Fiber Membranes from Banana Stem Fibers Coated by TiO2 for Degradation of Waste Textile Dye

2021 ◽  
Vol 15 (2) ◽  
pp. 291-298
Author(s):  
Siti Wafiroh ◽  
◽  
Abdulloh Abdulloh ◽  
Alfa Akustia Widati ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cellulose Acetate ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Textile Dye ◽  
Fiber Membrane ◽  
Alternative Material ◽  
Resistance Performance ◽  
Dope Concentration ◽  
Banana Stem

Cellulose acetate hollow fiber membrane from banana stem fibers coated by TiO2 (CAHFMT) was prepared and characterized as an alternative material for degradation of waste textile dye. Its applicability was demonstrated by mechanical properties, FTIR, SEM, thermal resistance, performance, and degradation efficiency. Cellulose acetate (CA) was synthesized from banana stem fibers by swelling stage, acetylation reaction, and hydrolysis reaction. CA was modified using TiO2 of various concentrations. CAHFMT with 22 % w/v dope concentration has the optimum mechanical properties (stress, strain and Young’s modulus), as well as hydrophilic properties. The performances of CAHFMT with Congo red were determined. The SEM results showed that the membrane had rigid pores. Moreover, this research stated that CAHFMT could be a solution to overcome economical and effective problems.

Computational Study of Reverse Osmosis Desalination Process: Hollow Fiber Module

2017 ◽  
Author(s):  
Mustafa Usta ◽  
Ali E. Anqi ◽  
Michael Morabito ◽  
Alaa Hakim ◽  
Mohammed Alrehili ◽  
...  
Keyword(s):  
Flow Field ◽  
Mass Transport ◽  
Reverse Osmosis ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Hollow Fiber Membranes ◽  
Fiber Membrane ◽  
Flow Rates ◽  
Fiber Membranes ◽  
Feed Channel

Reverse Osmosis (RO) is a process whereby solutes are removed from a solution by means of a semipermeable membrane. Providing access to clean water is one of our generation’s grand engineering challenges, and RO processes are taking center stage in the global implementation of water purification technologies. In this work, computational fluid dynamics simulations are performed to elucidate the steady state phenomena associated with the mass transport of solution through cylindrical hollow fiber membranes in hopes of optimizing RO technologies. The Navier-Stokes and mass transport equations are solved numerically to determine the flow field and solute concentration distribution in the hollow fiber membrane bank, which is a portion of the three-dimensional feed channel containing a small collection of fibers. The k-ω Shear Stress Transport turbulence model is employed to characterize the flow field. Special attention is given to the prediction of water passage through hollow fiber membranes by the use of the solution-diffusion model, which couples the salt gradient, water flux, and local pressure at the membrane surface. This work probes hollow fiber membrane arrangement in the feed channel by considering inline and staggered alignments. Feed flow rates for Reynolds number values ranging between 400 and 1000 are considered. Increased momentum mixing within the feed channel solution can substantially enhance the system efficiency, and hollow fiber membrane arrangements and feed flow rates dictate the momentum mixing intensity. Velocity and vorticity iso-surfaces of the flow domain are presented in order to assess the momentum mixing achieved with various hollow fiber membrane arrangements and flow rates. The total water permeation rate per hour is calculated to compare system efficiencies, and the coefficient of performance is calculated to compare membrane performance relative to the necessary power input, both for the various hollow fiber membrane arrangements and feed flow rates.

scholarly journals Osmotically Assisted Reverse Osmosis Utilizing Hollow Fiber Membrane Module for Concentration Process

2019 ◽  
Vol 58 (16) ◽  
pp. 6721-6729 ◽  
Author(s):  
Norihiro Togo ◽  
Keizo Nakagawa ◽  
Takuji Shintani ◽  
Tomohisa Yoshioka ◽  
Tomoki Takahashi ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Membrane Module ◽  
Fiber Membrane ◽  
Concentration Process

Interfacially Polymerized Composite Hollow Fiber Membrane for CO2 Separation

2013 ◽  
Vol 781-784 ◽  
pp. 2040-2046
Author(s):  
Alsamani A. M. Salih ◽  
Chun Hai Yi ◽  
Bo Lun Yang ◽  
Peng Chen
Keyword(s):  
Hollow Fiber ◽  
Interfacial Polymerization ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Acceptor Concentration ◽  
Membrane Performance ◽  
Inner Surface ◽  
Trimesoyl Chloride ◽  
Very High ◽  
Organic Monomer

PEAm-TMC/PDMS/PVC composite hollow fiber membrane for CO2 separation was developed through interfacial polymerization (IP) on the PDMS pre-coated inner surface of PVC hollow fiber. Polyetheramine (PEAm) and Trimesoyl chloride (TMC) were selected as aqueous monomer and organic monomer, respectively. SEM observation result shows that the thickness of PEAm-TMC IP layer is about 215 nm. The effects of monomer concentrations and acid acceptor concentration on the membrane performance were investigated. The results shows that the CO2 permeance decareses and CO2/N2 selectivity increases with the increasing concentrations of PEAm, TMC and Na2CO3. At 0.12 MPa, the composite hollow fiber membrane possesses a very high CO2 permeance of 964 GPU and CO2/N2 selectivity of 40.6.

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