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Enhancement of Oxygen Mass Transfer Using Functionalized Magnetic Nanoparticles
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Section:Abstract
Oxygen-transfer enhancement has been observed in the presence of colloidal dispersions of magnetite (Fe3O4) nanoparticles coated with oleic acid and a polymerizable surfactant. These fluids improve gas−liquid oxygen mass transfer up to 6-fold (600%) at nanoparticle volume fractions below 1% in an agitated, sparged reactor and show remarkable stability in high-ionic strength media over a wide pH range. Through a combination of experiments using physical and chemical methods to characterize mass transfer, it is shown that (i) both the mass transfer coefficient (kL) and the gas−liquid interfacial area (a) are enhanced in the presence of nanoparticles, the latter accounting for a large fraction of the total enhancement (80% or more), (ii) the enhancement in kL measured by physical and chemical methods is similar and ranges from 20 to 60% approximately, (iii) the enhancement in kL levels off at a nanoparticle volume fraction of approximately 1% v/v, and (iv) the enhancement in kLa shows a strong temperature dependence. These results are relevant to a wide range of processes limited by the mass transfer of a solute between a gas phase and a liquid phase, such as fermentation, waste treatment, and hydrogenation reactions.
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This article has been cited by 5 ACS Journal articles (5 most recent appear below).
Anomalous Enhancement of Interphase Transport Rates by Nanoparticles: Effect of Magnetic Iron Oxide on Gas−Liquid Mass Transfer
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Srinivas Komati and Akkihebbal K. SureshIndustrial & Engineering Chemistry Research2010 49 (1), 390-405In this paper, we examine the effect of magnetic iron oxide nanoparticles on gas−liquid mass transfer rates. Carbon dioxide and oxygen are the gases absorbed, into a variety of reactive and nonreactive liquids. Experiments have been carried out in a ...
Recyclable Nanobiocatalyst for Enantioselective Sulfoxidation: Facile Fabrication and High Performance of Chloroperoxidase-Coated Magnetic Nanoparticles with Iron Oxide Core and Polymer Shell
Wen Wang, Yi Xu, Daniel I. C. Wang and Zhi LiJournal of the American Chemical Society2009 131 (36), 12892-12893Recyclable Nanobiocatalyst for Enantioselective Sulfoxidation: Facile Fabrication and High Performance of Chloroperoxidase-Coated Magnetic Nanoparticles with Iron Oxide Core and Polymer Shell
Wen Wang, Yi Xu, Daniel I. C. Wang and Zhi LiJournal of the American Chemical Society2009 131 (36), 12892-12893Magnetic nanoparticles (MNPs) with a core diameter of 30 nm comprising several iron oxide crystals, a poly(glycidyl methacrylate) (PGMA) shell with a thickness of 30 nm, and a surface coated with chloroperoxidase (CPO) were facilely fabricated as a ...
Effect of Electrolytes on CO−Water Mass Transfer
Haiyang Zhu, Brent H. Shanks and Theodore J. HeindelIndustrial & Engineering Chemistry Research2009 48 (6), 3206-3210Effect of Electrolytes on CO−Water Mass Transfer
Haiyang Zhu, Brent H. Shanks and Theodore J. HeindelIndustrial & Engineering Chemistry Research2009 48 (6), 3206-3210The influence of various electrolytes such as sulfate, nitrate, and chloride on CO−water mass transfer was investigated in this study. The results indicate that the enhancement in the CO−water volumetric mass-transfer coefficient ranged from 1.5 to 4.7 ...
Enhancing CO−Water Mass Transfer by Functionalized MCM41 Nanoparticles
Haiyang Zhu, Brent H. Shanks and Theodore J. HeindelIndustrial & Engineering Chemistry Research2008 47 (20), 7881-7887Enhancing CO−Water Mass Transfer by Functionalized MCM41 Nanoparticles
Haiyang Zhu, Brent H. Shanks and Theodore J. HeindelIndustrial & Engineering Chemistry Research2008 47 (20), 7881-7887Organic groups are grafted to
250-nm-diameter MCM41 nanoparticles with a spherical morphology to enhance the CO−water volumetric mass-transfer coefficient (kLa) for synthesis gas fermentation. The results indicate that (i) 250-nm MCM41 nanoparticles ...
Characteristics of Magnetic Mesoparticles Fabricated by Electroless Nickel Deposition
Ming-Kai Chang, Chun-Han Chen, and Bing-Hung ChenIndustrial & Engineering Chemistry Research2008 47 (9), 3021-3029Characteristics of Magnetic Mesoparticles Fabricated by Electroless Nickel Deposition
Ming-Kai Chang, Chun-Han Chen, and Bing-Hung ChenIndustrial & Engineering Chemistry Research2008 47 (9), 3021-3029A low-cost wet chemical process, viz., the electroless nickel deposition, was successfully developed to produce magnetic nickeltungstenphosphorus (NiWP) mesoparticles with diameters ranging from 100 to 500 nm on silica templates of ca. 102 nm and gold ...
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History
- Published In Issue June 07, 2006
- Received for review December 2, 2005
Revised manuscript received March 20, 2006
Accepted April 10, 2006
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