Gas-permeable composite hollow-fiber membrane with a three-layered structure

Uenishi, Masamoto; Fukushima, Noriaki; Mizuta, Masahiko; Kamo, Jun; Tsuru, Toshinori

doi:10.1016/j.memsci.2014.04.042

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…However, during the thermal treatment, cracks and defects tend to appear due to the mismatch of the thermal expansion coefficients between the ceramic separation layer and the metallic support layer, because the metal support is expanding while the ceramic membrane is shrinking for traditional route. 5,6 In the state of the art, the preparation of inorganic asymmetric membranes is focused on the fundamental research of the combinatorial properties, so that most microfiltration membranes consist of several layers with a gradual decrease in pore size and/or a gradual decrease in thermal expansion coefficients toward the feed side of the membrane. Li and co-workers 7 prepared a composite TiO 2 microfiltration membrane with two intermediate layers on macro-porous stainless steel substrates to inhibit the top layers infiltration.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a graded pore-sized porous FeAl intermetallic membrane

Xie

Gao

et al. 2016

Powder Metallurgy

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Micro-porous FeAl membranes were prepared directly onto a macro-porous FeAl support through brushing and reactive synthesis using Fe and Al elemental powders with different particle sizes. X-ray diffraction, scanning electron microscope and pore structure testing were used to study the phase composition, interfacial microstructure and pore structure of the resulting graded pore-sized FeAl membrane. The effects of membrane thickness on permeability and maximum pore size were also investigated. Results showed that a metallurgically strong joint is formed between the membrane and support and that no cracks and defects may be found on the interface due to the elemental reactions, penetrating of coated powders into the pores of the support and the match of the thermal expansion coefficients between membrane and support. Membrane permeability decreased from 84.2 to 38.5 m 3 m −2 kPa −1 h −1 and the maximum pore size of about 2.5 μm showed a slight change as the membrane thickness increased from 135.5 to 299.1 μm.

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Section: Introductionmentioning

confidence: 99%

Fabrication of a graded pore-sized porous FeAl intermetallic membrane

Xie

Gao

et al. 2016

Powder Metallurgy

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“…A partir desse momento, inicia-se a fase de aperfeiçoamento das membranas poliméricas, para que mais processos industriais, como separação de gases, destilação por membranas e pervaporação, pudessem ser atendidos (BAKER, 2001). De 1960De a 1980 o status da tecnologia de membranas poliméricas mudou significativamente, e os tipos de membranas desenvolvidas naquela época são produzidas e aprimoradas até hoje, através de estudos sobre método de produção (BAKERI et al, 2014;UENISHI et al, 2014), modificações de matriz (MAHAJAN;KOROS;THUNDYIL, 1999;ZULHAIRUN et al, 2014), entre outras técnicas.…”

Section: 2unclassified

Desenvolvimento de membranas assimétricas de polieterimida e estudo comparativo pós modificação bioinspirada

Vermeersch¹

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In the last years membrane separation processes became markably interesting for the industry, mainly due to financial scope. Polymer membranes are frequently employed in these processes because of its thermal and chemical stability that make them versatile materials. The performance of gas membrane separation processes is proceeded through selectivity measurement, which analyse the permeability of membrane for gases. A challenge in the production of polymeric membrane is achieve good permeability and selectivity in the same material, to attend applications needs. One of the objectives of this work was to investigate the influence of production stage variables on the membranes' morphology. The method chosen was the phase inversion and an experimental design was performed to delineate the conditions to obtain membranes of polyetherimide. In the next step, the following characterizations were performed: Scanning electronic microscopy (SEM), contact angle (CA), water vapour transmission (WVT) and selectivity of the gaseous pair, oxygen (O2) and carbon dioxide (CO2). The results obtained for transport analysis received a statistical treatment to point the best sample to be used in the second step of this work: a bioinspired modification through surface polydopamine deposition. The sample PEI 3 that presented the second larger WVT rate and median selectivity was chosen for this purpose. Finally, the results of selectivity transport analysis of the gaseous pair oxygen (O2) and carbon dioxide (CO2) for non modified and modified membranes were compared. It was possible to conclude that the surface modification promotes increase in WVT rates and O2 permeance.

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Simulation and control of membrane reactors for catalytic reduction of dissolved oxygen from water

et al. 2017

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Removal of dissolved oxygen (DO) from water has gained much attention in recent decades to prevent different problems such as corrosion, bio‐fouling, and performance degradation in many industries. The traditional physical and chemical methods for DO removal have found wide application in industries. However, physical methods have low efficiency and chemical methods often produce undesirable products. Therefore, catalytic reduction by hydrogen has been regarded by a variety of industries recently. In this study, catalytic reduction of DO from water is examined using membrane reactors. The mathematical model of this system is developed while considering the axial dispersion, membrane permeation, and chemical reaction. The model is solved in steady state mode and the effect of various parameters on the DO removal is investigated. The results of steady state mode are used as initial conditions for solving the model in dynamic mode. The impact of operating conditions such as water flow rate, DO concentration of influent water, hydrogen flow rate, and hydrogen pressure on the performance of the DO process is studied. Results of the dynamic simulation suggest that hydrogen pressure is the best option to be used as a manipulated variable for control of effluent DO concentration. Finally, a PI controller is implemented to control the system. The closed loop responses indicate that a PI controller would perform well both in load rejection and setpoint tracking if it is tuned accurately.

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Gas-permeable composite hollow-fiber membrane with a three-layered structure

Cited by 7 publications

References 16 publications

Fabrication of a graded pore-sized porous FeAl intermetallic membrane

Fabrication of a graded pore-sized porous FeAl intermetallic membrane

Desenvolvimento de membranas assimétricas de polieterimida e estudo comparativo pós modificação bioinspirada

Simulation and control of membrane reactors for catalytic reduction of dissolved oxygen from water

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