Air separation by integrally asymmetric hollow‐fiber membranes

Feng, Xinbin; Ivory, John; Rajan, V. S. V.

doi:10.1002/aic.690451013

Cited by 49 publications

(67 citation statements)

References 7 publications

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“…If the feed gas is a mixture, the situation is more complex. Although some authors still assume the gas permeance in a mixture is the same as pure gas permeance [16,34,35], we tend to believe there is a mutual interaction due to the different gas permeation speeds. In order to examine this theory, the Maxwell-Stefan (MS) equation should be applied to consider this kind of counter-exchange [29,36,37].…”

Section: Membrane Mass Transfermentioning

confidence: 87%

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Simulation of binary gas separation through multi-tube molecular sieving membranes at high temperatures

Wang

Hooman

et al. 2013

Chemical Engineering Journal

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Section: Membrane Mass Transfermentioning

confidence: 87%

“…(2) contains both the advection term @ðJx H2 Þ @l and the diffusion term @ @l D @ðcx H2 Þ @l . In liquid or low temperature gas separation in small scale modules, advection is far more intense than diffusion, so diffusion is always omitted in the component mass balance equation [15][16][17][18][19][20]. As a result, Eq.…”

Section: Gas Phase Mass Transfermentioning

confidence: 98%

Simulation of binary gas separation through multi-tube molecular sieving membranes at high temperatures

Wang

Hooman

et al. 2013

Chemical Engineering Journal

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“…By using Equations (16,10,11), an ordinary differential equation (ODE) is obtained as follows for calculating the pressure build-up in the permeate-side:…”

Section: Methodology Based On Boundary Value Problemmentioning

confidence: 99%

“…Unit Feng et al [16] Tranchino et al [17] Feed Table 5. Critical properties, acentric factor, and molar heat capacities of gas molecules [26] Component T c (K) attributed to the intrinsic properties of O 2 and N 2 molecules and low feed pressure leading to nearly ideal conditions.…”

Section: Input Parametermentioning

confidence: 99%

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Transport Properties of Asymmetric Hollow Fiber Membrane Permeators for Practical Applications: Mathematical Modelling for Binary Gas Mixtures

Hosseini¹,

Roodashti²,

Kundu

et al. 2015

Can J Chem Eng

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Hollow fiber membrane permeators have gained widespread acceptance for a variety of applications, including gas separation. This study presents our efforts to develop an appropriate methodology and mathematical modelling for the analysis of the transport properties and separation performance in hollow fiber membrane permeators with asymmetric structure. A relatively simplified model, developed based on ideal conditions, provides the opportunity for having a quick and overall prediction of the separation performance; while a comprehensive model developed by incorporation of non-ideal conditions enables a more accurate prediction of the membrane performance. The real gas behaviour, temperature, pressure, and concentration dependence of gas viscosity, as well as pressure changes on both sides of hollow fibers, concentration polarization, temperature change due to permeation, and temperature dependence of permeance are considered non-ideal parameters in development of the model. The integrated models with associated parameters in the form of differential equations are coded in MATLAB and solved as initial value problems using appropriate numerical methods. The validity of the developed models is examined, indicating close agreement between predictions and the experimental data provided in literature. The proposed methodology and developed models provide valuable opportunities for researchers in designing appropriate hollow fiber membrane permeators and processes for practical gas separation applications.

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Microstructural and Interfacial Designs of Oxygen‐Permeable Membranes for Oxygen Separation and Reaction–Separation Coupling

Zhu

Yang

2019

Advanced Materials

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Mixed ionic–electronic conducting oxygen‐permeable membranes can rapidly separate oxygen from air with 100% selectivity and low energy consumption. Combining reaction and separation in an oxygen‐permeable membrane reactor significantly simplifies the technological scheme and reduces the process energy consumption. Recently, materials design and mechanism investigations have provided insight into the microstructural and interfacial effects. The microstructures of the membrane surfaces and bulk are closely related to the interfacial oxygen exchange kinetics and bulk diffusion kinetics. Therefore, the permeability and stability of oxygen‐permeable membranes with a single‐phase structure and a dual‐phase structure can be adjusted through their microstructural and interfacial designs. Here, recent advances in the development of oxygen permeation models that provide a deep understanding of the microstructural and interfacial effects, and strategies to simultaneously improve the permeability and stability through microstructural and interfacial design are discussed in detail. Then, based on the developed high‐performance membranes, highly effective membrane reactors for process intensification and new technology developments are highlighted. The new membrane reactors will trigger innovations in natural gas conversion, ammonia synthesis, and hydrogen‐related clean energy technologies. Future opportunities and challenges in the development of oxygen‐permeable membranes for oxygen separation and reaction–separation coupling are also explored.

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Air separation by integrally asymmetric hollow‐fiber membranes

Cited by 49 publications

References 7 publications

Simulation of binary gas separation through multi-tube molecular sieving membranes at high temperatures

Simulation of binary gas separation through multi-tube molecular sieving membranes at high temperatures

Transport Properties of Asymmetric Hollow Fiber Membrane Permeators for Practical Applications: Mathematical Modelling for Binary Gas Mixtures

Microstructural and Interfacial Designs of Oxygen‐Permeable Membranes for Oxygen Separation and Reaction–Separation Coupling

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