Effects of Feed Pressure and Retentate Flow Rate on the Performance of Locally Developed Polysulfone Membrane Oxygen Enrichment System

2012 ◽  
Author(s):  
Ahmad Fauzi Ismail ◽  
Chin Yin Tan ◽  
Fook Kiong Chan
Keyword(s):  
Flow Rate ◽  
Hollow Fiber ◽  
Capital Investment ◽  
Hollow Fiber Membrane ◽  
Membrane System ◽  
Oxygen Enrichment ◽  
Air Separation ◽  
Fiber Membrane ◽  
Polysulfone Membrane ◽  
Feed Pressure

Pengkayaan oksigen daripada udara persekitaran dengan menggunakan teknologi membran diterima secara meluas di seluruh dunia sebagai teknologi alternatif kepada kaedah konvensional seperti penjerapan ayunan tekanan dan sistem kriogenik. Pemisahan udara menggunakan membran adalah proses yang lebih anjal di mana ia memerlukan pelaburan modal yang rendah, kaedah operasi yang mudah dan murah jika dibandingkan dengan kaedah konvensional. Kajian dan pengujian telah dijalankan ke atas sistem membran gentian geronggang polisulfona, di mana kesan tekanan suapan dan kadar alir baki dikaji. Pada kadar alir malar, pengkayaan telapan meningkat dan kemudian menurun dengan peningkatan tekanan disebabkan oleh kesan perbezaan tekanan merentasi membran mempengaruhi kebolehtelapan lapisan kulit. Manakala pada tekanan suapan malar, nilai pengkayaan telapan maksimum dicapai pada kadar alir maksimum disebabkan oleh peningkatan rintangan penelapan. Nilai maksimum ketulenan telapan oksigen yang diperolehi dalam uji kaji ini ialah 27.2%. Kata kunci: Pemisahan udara; membran gentian geronggang; pengkayaan oksigen; kebolehtelapan; polisulfona Oxygen enrichment from surrounding air by using membrane is gaining wide acceptance through out the world today as an alternative to the conventional methods such as pressure swing adsorption and cryogenic system. Air separation using membrane is a more flexible process that requires lower capital investment and simple operation. Studies and testing had been performed on a locally new developed polysulfone hollow fiber membrane system, where effects of feed pressure and retentate flow rate on the oxygen enrichment were observed. At constant retentate flow rate, permeate enrichment increased and then decreased with pressure due to the effect of pressure difference across the membrane, which affects the permeability of the skin layer. While at constant pressure, the highest permeate enrichment value was obtained at highest retentate flow rate due to the increase of permeation resistance. The highest oxygen purity obtained in this experiment was 27.2% and the O2 permeate enrichment was 1.295. Key words: Air separation; hollow fiber membrane; oxygen enrichment; permeability; polysulfone

scholarly journals Toward Respiratory Support of Critically Ill COVID-19 Patients Using Repurposed Kidney Hollow Fiber Membrane Dialysers to Oxygenate the Blood

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
David M. Rubin ◽  
Neil T. Stacey ◽  
Tonderayi Matambo ◽  
Claudia Do Vale ◽  
Martin J. Sussman ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Hollow Fiber ◽  
Oxygen Transfer ◽  
Resource Constraints ◽  
Hollow Fiber Membrane ◽  
Low Cost ◽  
Venous Access ◽  
Respiratory Support ◽  
Fiber Membrane ◽  
Polysulfone Membrane

The COVID-19 pandemic has highlighted resource constraints in respiratory support. The oxygen transfer characteristics of a specific hollow fiber membrane dialyser was investigated with a view to repurposing the device as a low-cost, readily available blood oxygenator. Oxygen transfer in a low-flux hollow fiber dialyser with a polysulfone membrane was studied by passing first water and then blood through the dialyser in countercurrent to high-purity oxygen. Oxygen transfer rates of about 15% of the nominal 250 ml (STP)/min of a typical adult oxygen consumption rate were achieved for blood flow rates of 500 ml/min. Using two such dialysis devices in parallel could provide up to 30% of the nominal oxygen consumption. Specific hollow fiber dialysis devices operating with suitable pumps in a veno-venous access configuration could provide a cost-effective and readily available supplementation of respiratory support in the face of severe resource constraints.

0711 Effects of fresh water flow rate on the performance of hollow fiber membrane module

2014 ◽  
Vol 2014 (0) ◽  
pp. _0711-1_-_0711-4_
Author(s):  
Shingo TERASHIMA ◽  
Hidechito HAYASHI ◽  
Tetsuya OKUMURA ◽  
Kei MATSUYAMA ◽  
Morihiro IRIE ◽  
...  
Keyword(s):  
Fresh Water ◽  
Water Flow ◽  
Flow Rate ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Water Flow Rate ◽  
Membrane Module ◽  
Fiber Membrane

Simulation and sensitivity analysis of transport in asymmetric hollow fiber membrane permeators for air separation

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86359-86370 ◽  
Author(s):  
Seyed Saeid Hosseini ◽  
Sara Najari ◽  
Prodip K. Kundu ◽  
Nicolas R. Tan ◽  
Seyed Mehrdad Roodashti
Keyword(s):  
Sensitivity Analysis ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Air Separation ◽  
Fiber Membrane ◽  
Operational Conditions ◽  
Separation Membrane

Development of advanced membranes requires deep insights about the process. Sensitivity analysis is performed to analyze the effects of module properties and process operational conditions on the performance of air separation membrane permeators.

scholarly journals Optimization of CO2Absorption Characteristic under the Influence of SO2in Flue Gas by Hollow Fiber Membrane Contactor

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Ziyi Qu ◽  
Li Zhang ◽  
Yunfei Yan ◽  
Shunxiang Ju
Keyword(s):  
Flow Rate ◽  
Hollow Fiber ◽  
Flue Gas ◽  
Gas Flow ◽  
Hollow Fiber Membrane ◽  
Flow Rate Ratio ◽  
Absorption Characteristic ◽  
Membrane Contactor ◽  
Gas Flow Rate ◽  
Fiber Membrane

Hollow fiber membrane contactor is a new, highly efficient, and the most promising technology for CO2absorption in flue gas. There is still SO2that exists in the flue gas after desulfurization tower of power plant. This paper studied the influence of SO2on CO2absorption characteristic in flue gas by hollow fiber membrane contactor with absorbent of EDA, EDA + MEA (0.6 : 0.4), and EDA + MEA + PZ (0.4 : 0.4 : 0.2). The influences of SO2concentration, cycle absorption and desorption characteristic of absorbent, absorbent concentration, and liquid-gas flow rate ratio are studied to analyze the influence of SO2on CO2absorption characteristic. The appropriate absorbent composition ratio and appropriate parameter range that can inhibit the influence of SO2are proposed by studying the hybrid sorbent with activating agent, appropriate absorbent concentration, and ratio of liquid-gas flow rate. Among the three kinds of absorbents, EDA + MEA + PZ (0.4 : 0.4 : 0.2) had the best tolerance ability to SO2and the highest efficiency. With comprehensive consideration of CO2removal efficiency and operating cost, under the condition of 1000 ppm SO2, the appropriate concentration and liquid-gas flow rate ratio of EDA, EDA + MEA, and EDA + MEA + PZ are proposed.

Controlled Atmosphere Systems for Marine Vessels

1995 ◽  
Vol 32 (02) ◽  
pp. 147-150
Author(s):  
Mike Harrison ◽  
Peter Herlihy
Keyword(s):  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Natural Extension ◽  
Fruit And Vegetables ◽  
Air Separation ◽  
Controlled Atmosphere ◽  
Fiber Membrane ◽  
Cut Flowers ◽  
Low Oxygen ◽  
Chemical Company

Controlled atmosphere (CA) preservation of perishable fruit and vegetables represents new opportunities for today's reefer operators. This technology affords the carrier an efficient and economical method of introducing and maintaining a low oxygen atmosphere that, when used in conjunction with temperature control, can significantly enhance the preservation of fruit and vegetables. Improved product quality, new markets, and reduced product losses are benefits realized through the use of hollow fiber membrane air separation technology. Seasonal products, which may be unavailable because of the transit time of shipping, are now a reality for operators utilizing this technology. High-value products such as fresh cut flowers, previously dedicated to air freight, may be a natural extension of the technology. The authors' company is a wholly owned subsidiary of The Dow Chemical Company. Generon supplies hollow fiber membrane systems for the on-site generation of gaseous nitrogen. In 1992 the company provided turnkey design and installation services of controlled atmosphere systems for three fully refrigerated containerships operated by the Great White Fleet. These ABS-classed vessels were the first of their type to fully utilize controlled atmosphere technology for the improved quality and reduction of perishable losses.

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