Long-Term Performance of Parallel-Flow, Bubbleless, Hollow-Fiber-Membrane Aerators

1999 ◽  
Vol 71 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Michael A. Voss ◽  
Tariq Ahmed ◽  
Michael J. Semmens
Keyword(s):  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Parallel Flow ◽  
Fiber Membrane ◽  
Long Term Performance ◽  
Term Performance

PVDF-CLOISITE HOLLOW FIBER MEMBRANE FOR CO2 ABSORPTION VIA MEMBRANE CONTACTOR

2017 ◽  
Vol 79 (1-2) ◽  
Author(s):  
Izzati Ahmad Rudaini ◽  
Rosmawati Naim ◽  
Sureena Abdullah ◽  
Nadzirah Mohd Mokhtar ◽  
Juhana Jaafar
Keyword(s):  
Contact Angle ◽  
Hollow Fiber ◽  
Polyvinylidene Fluoride ◽  
Hollow Fiber Membrane ◽  
Co2 Absorption ◽  
Membrane Contactor ◽  
Entry Pressure ◽  
Long Term Performance ◽  
Term Performance

The effect of cloisite concentrations on CO2 absorption via polyvinylidene fluoride-cloisite hollow fiber in membrane contactor system was investigated. PVDF polymer was modified by introducing different compositions of cloisite clay (S1: 0%, S2:1 wt%, S3: 3 wt% and S4: 5 wt%) into the polymer solution. The hollow fiber membranes were examined via liquid entry pressure (LEPw), contact angle and scanning electron microscope (SEM). CO2 absorption test was conducted at different liquid absorbent flow rates of 1M MEA. S4 gives highest Liquid entry pressure value and S3 obtained highest contact angle value at around 87.21º. Different concentrations of cloisite exhibited various finger-like structure with sponge-like morphology on the membrane lumen side. Meanwhile, the highest CO2 absorption flux of 3.41×10-2 mol/m2.s at flowrate of 200 ml/min was obtained for membrane S4. Long term performance for membrane S4 up to 55 hours of CO2 absorption showed increasing absorption trend up to 6.78 ×10-2 mol/m2.s of CO2 fluxes. 

scholarly journals Long-Term Stability of PVDF-SiO2-HDTMS Composite Hollow Fiber Membrane For Carbon Dioxide Absorption in Gas–Liquid Contacting Process

2021 ◽  
Author(s):  
Honglei Pang ◽  
Yayu Qiu ◽  
Weipeng Sheng
Keyword(s):  
Carbon Dioxide ◽  
Flow Rate ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Inorganic Nanoparticles ◽  
Inversion Method ◽  
Stable Operation ◽  
Fiber Membrane ◽  
Operation Performance

Abstract To obtain a long-term stable operation of the hollow fiber membrane for using in membrane contact absorption of carbon dioxide (CO2), hybrid polyvinylidene fluoride-silica-hexadecyltrimethoxysilane (PVDF-SiO2-HDTMS) membrane were fabricated via the non-solvent induced phase-inversion method. The surface properties, performance characteristics and long-term stable operation performance of the prepared membranes were compared and analyzed. The results show the outer surface of the prepared membranes exhibited superhydrophobicity because of the formation of rough nano-scale microstructures and the low surface free energy. Due to the addition of inorganic nanoparticles, the mechanical strength of PVDF-SiO2-HDTMS membranes were improved. The long-term stable operation experiments were carried out with the inlet gas (CO2/N2 = 19/81, v/v) at a flow rate of 20 mL/min and the absorbent liquid (1 mol/L DEA) at a flow rate of 50 mL/min. And the result showed that the mass transfer flux of PVDF-SiO2-HDTMS membrane decreased from the initial value of 2.39×10-3 mol/m2s to 2.31×10-3 mol/m2s, which was a decrease of 3% after 20 days. The main benefit is the addition of inorganic nanoparticles, which have strong chemical resistance and high hydrophobicity, thereby preventing structural damage and pore wetting of the membrane. PVDF-SiO2-HDTMS membrane exhibits excellent long-term stable operation performance of CO2.

Energy loss characteristics of parallel flow bubbleless hollow fiber membrane aerators

2000 ◽  
Vol 171 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Tariq Ahmed ◽  
Michael J Semmens ◽  
Michael A Voss
Keyword(s):  
Energy Loss ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Parallel Flow ◽  
Fiber Membrane
Sign in / Sign up

Export Citation Format

Share Document