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Showing 1 to 20 of 67 for “"Hollow fiber"”.
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Crystalization studies in hollow fiber devices
… tested in the unique flow environment offered by hollow fiber devices. In addition, a new type of heat exchanger based on hollow fibers was tested as well as the potential use of porous hollow fiber devices as mixing devices. Hollow fiber devices are compact, extremely efficient on a volumetric …
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Carbon dioxide transfer through hollow fiber membranes
… aqueous solution using hydrophobic microporous hollow fiber membranes (HFM's) were performed. The use of HFM's for CO2 transfer could significantly improve the biomass growth rate in a photobioreactor for algal biofuel production. The membrane modules were operated in a sealed-end, parallel flow …
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Hollow fiber membrane-based air gap membrane distillation
… characteristics of AGMD are evaluated by using a hollow-fiber-set-based compact device. Hot brine solution and cold water are passed through two different fiber sets separately: porous hydrophobic polyvinylidene fluoride hollow fibers of the E type (PVDF E) and solid polypropylene (PP) hollow …
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Hollow Fiber Ultrafiltration of Water Extracts of Soybeans
Made available in DSpace on 2014-12-13T19:47:44Z (GMT). No. of bitstreams: 1 7915408.pdf: 7836603 bytes, checksum: 26a67ea0454cc7053c8be0304b6ebba6 (MD5) Previous issue date: 1979
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Hollow fiber sorbents for the desulfurization of pipeline natural gas
… Swing Adsorption (RTSA) system utilizing hollow fibers with polymer 'binder', impregnated with high loadings of sulfur selective sorbent 'fillers'. Steam and cooling water can be utilized to thermally swing the sorbent during the regeneration cycles. An impermeable, thin polymer barrier …
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Process Engineering Characteristics of the Hollow Fiber Ultrafiltration of Skimmilk
… of skimmilk was studied using a pilot-scale hollow fiber membrane unit. The independent variables were transmembrane pressure, flow rate, temperature and feed concentration and the major measured variable was permeate flux (J). Physical properties such as density, viscosity and protein …
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Engineering polymeric hollow fiber membrane reactors for sustainable chemical transformation reactions
… highly swelling-resistant asymmetric polymeric hollow fiber surfaces for non-leaching catalysis. This novel hollow fiber membrane reactor was used as a heterogeneous catalyst and continuous-flow reactor for various reactions including aldol and nitroaldol condensation, Heck coupling, tandem …
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Partial nitrification and oxygen transfer analysis utilizing hollow fiber membrane aeration
… system to provide the necessary substrates.y A hollow fiber membrane reactor was employed to create this partial nitrification system.y Gas mass transfer was first evaluated to determine the K<sub>L</sub>a oxygen transfer coefficient. Reactor parameters, such as mixing speed, membrane length, …
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Highly productive ester crosslinkable composite hollow fiber membranes for aggressive natural gas separations
… areas with high feed pressures. Dual-layer hollow fiber spinning can be used to reduce the cost of membrane production by integrating a low-cost supporting core polymer with the expensive crosslinkable sheath polymer. However, the complexity of interfacial interaction between the sheath/core …
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Solvent resistant microporous/nanoporous polymeric hollow fiber and flat film membranes and their applications
… focused on developing solvent resistant hollow fiber and flat film membranes for separation and purification of organic-solvent-based process streams. Available porous polymeric supports (Polypropylene (PP), Polyethersulfone (PES) and Nylon) suitable for the required solvent-stable …
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Investigation of solid polymeric hollow fiber heat exchange devices for use in thermally-driven desalination processes
… using modules made out of solid polymeric hollow fibers of polypropylene (PP) and polyetheretherketone (PEEK) has been studied. The solid hollow fiber dimensions were 425um/575um (ID/OD) for PP and 420um/570um (ID/OD) for PEEK. Extensive heat transfer measurements have been performed and …
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Modeling low-pressure nanofiltration membranes and hollow fiber modules for softening and pretreatment in seawater reverse osmosis
… novel class of low-pressure nanofiltration (NF) hollow fiber membranes, particularly suited for water softening and desalination pretreatment have lately been fabricated in-house using layer-by-layer (LbL) deposition with chemical crosslinking. These membranes can operate at exceedingly low …
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Treatment of High-Strength Nitrogen Wasetewater With a Hollow-Fiber Membrane-Aerated Biofilm Reactor: A Comprehensive Evaluation
… the capability of one such technology, a hollow-fiber membrane-aerated biofilm reactor (HFMBR), to achieve completely autotrophic nitrogen removal from a wastewater with high nitrogen content. Because the extent of oxygenation is a key parameter for controlling the metabolic processes that …
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Optimizing the structure and plasticization resistance of asymmetric polyimide hollow fiber membranes for CO2 removal from natural gas
… physical and separation properties. Asymmetric hollow fibers with CO2/CH4 separation factors up to 67 were successfully fabricated under the optimum fabrication conditions. Our further thermodynamic analysis based on Hansen’s solubility parameter and kinetic analysis based on Hayduk and Minhas …
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Evaluation of hollow fiber bioreactors as an alternative to murine ascites production for small scale monoclonal antibody production
Thesis (M.S.)--Massachusetts Institute of Technology, Division of Toxicology, 1994.
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Characterization of a new miniaturized hollow-fiber bioreactor for cultivation of cell lines and primary cells to improve cytostatic drug testing in vitro
… models. In the present work, a new miniaturized hollow-fiber bioreactor system for mammalian cell culture in small volumes (up to 3 ml) is characterized with regard to transport characteristics and growth of leukemic cell lines (chapter 2). Cell and medium compartment are separated by dialysis …
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Mathematical Modeling for Nitrogen Removal via a Nitritation: Anaerobic Ammonium Oxidation-Coupled Biofilm in a Hollow Fiber Membrane Bioreactor and a Rotating Biological Contactor
… (anammox)-coupled biofilm in a counter-diffusion hollow fiber membrane bioreactor (HFMBR) and a nitritation: anammox-coupled biofilm in a co-diffusion rotating biological contactor (RBC) were developed and implemented using AQUASIM. Four different start-up scenarios on the nitritation: …
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Design and utilization of chiral selectors for enantioselective membrane transport
… the suitability of a selector for use in hollow-fiber membrane systems. Several chromatographically developed selectors show promise for large scale separation of enantiomers using hollow-fiber membrane technology. Chiral selectors derived from N-(1-naphthyl)leucine have been used in a …
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Study of vapor/gas permeation using thin immobilized liquid membrane
… of a hydrophilic, hydrophobic or ceramic hollow fiber substrate. To prepare such thin ILMs, three approaches were used: evaporation of the a volatile solvent; acrylic acid-grafted hollow fibers providing a thin hydrophilic layer; pressurization technique. For removal of volatile organic …
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