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Author

Katsuki Kusakabe

Other affiliations: Kagoshima University
Bio: Katsuki Kusakabe is an academic researcher from Kyushu University. The author has contributed to research in topics: Membrane & Permeation. The author has an hindex of 44, co-authored 207 publications receiving 7143 citations. Previous affiliations of Katsuki Kusakabe include Kagoshima University.
Topics: Membrane, Permeation, Zeolite, Permeance, Catalysis


Papers
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Journal ArticleDOI
TL;DR: In this paper, a porous α-alumina support tube, polished with a finely powdered X-type zeolite for use as seeds, was placed vertically in an autoclave containing an aqueous mixture of water glass and sodium aluminate.
Abstract: A porous α-alumina support tube, polished with a finely powdered X-type zeolite for use as seeds, was placed vertically in an autoclave containing an aqueous mixture of water glass and sodium aluminate. Hydrothermal synthesis was carried out at 90 °C for 24 h. A polycrystalline layer of Y-type zeolite was thus formed on the outer surface of the support tube. After washing and drying in air, permeances of single components and mixtures of CO2 and N2, as well as CH4, C2H6, and SF6, were determined. The CO2 permeance was higher than that of N2 at temperatures of 30−130 °C. When an equimolar mixture of CO2 and N2 was fed into the feed side, the CO2 permeance was nearly equal to that for the single-component system and the N2 permeance for the mixture was greatly decreased, especially at lower permeation temperatures. This was due to selective adsorption of CO2 in subnanometer micropores of the membrane. At 30 °C, the permeance of CO2 was higher than 10-7 mol·m-2·s-1·Pa-1, and the permselectivity of CO2 to N2 ...

387 citations

Journal ArticleDOI
TL;DR: A thin palladium membrane was formed inside the porous wall of an [alpha]-alumina support tube of 2.0mm i.d. and 2.6mm o.d by a metal-organic chemical vapor deposition (MOCVD) process in which the reaction temperature was continuously increased as discussed by the authors.
Abstract: A thin palladium membrane was formed inside the porous wall of an [alpha]-alumina support tube of 2.0-mm i.d. and 2.6-mm o.d. by a metal-organic chemical vapor deposition (MOCVD) process in which the reaction temperature was continuously increased. The metal source, palladium(II) acetate, was decomposed in argon under reduced pressure. For a membrane prepared with a maximum CVD temperature of 300 C, the hydrogen permeance and the selectivity to nitrogen in the range of 300--500 C were respectively higher than 0.1 mol/(m[sup 2][center dot]s) and 1,000 when the hydrogen pressure in the upstream side was about 0.1 MPa. Repeated temperature changes between 100 and 300 C revealed that the membrane was resistant to hydrogen embrittlement.

228 citations

Journal ArticleDOI
TL;DR: Faujasite-type zeolite membranes were reproducibly synthesized by hydrothermal reaction on the outer surface of a porous α-alumina support tube of 30 or 200mm in length as mentioned in this paper.

215 citations

Journal ArticleDOI
TL;DR: In this article, the defect concentration in the TiO2 crystallites strongly affects the transformation rate, and anatase particles produced at 1,173 K are transformed to rutile more rapidly than those produced by 1,373 K. The model can be applied to such particle production processes as collision, sintering and crystal transformation occurring simultaneously.
Abstract: Rate process concerning the formation of TiO2 fine crystalline particles by the gas-phase reaction of TiCl4 and O2 are studied using aerosol reactors. Chemical reaction of TiCl4, sintering of particles, mixing of reactants, and transformation from anatase to rutile are evaluated as the system parameters of the simulation model proposed. The crystallite size in the range of 55–65 nm at 1,273 K is predicted well by a model that assumes the maximum fusible particle size, 15 nm in this case. The defect concentration in the TiO2 crystallites strongly affects the transformation rate, and anatase particles produced at 1,173 K are transformed to rutile more rapidly than those produced at 1,373 K. The transformation is simulated quantitatively by the model with the coordinates for elapsed time, particle size and rutile fraction. The model can be applied to such particle production processes as collision, sintering and crystal transformation occurring simultaneously.

206 citations

Journal ArticleDOI
TL;DR: A-type zeolite membranes were synthesized on a porous support tube by a hydrothermal process as discussed by the authors, and the thickness was in the range of 0.4-3.8μm.

188 citations


Cited by
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Journal ArticleDOI
TL;DR: Approaches to Modifying the Electronic Band Structure for Visible-Light Harvesting and its Applications d0 Metal Oxide Photocatalysts 6518 4.4.1.
Abstract: 2.3. Evaluation of Photocatalytic Water Splitting 6507 2.3.1. Photocatalytic Activity 6507 2.3.2. Photocatalytic Stability 6507 3. UV-Active Photocatalysts for Water Splitting 6507 3.1. d0 Metal Oxide Photocatalyts 6507 3.1.1. Ti-, Zr-Based Oxides 6507 3.1.2. Nb-, Ta-Based Oxides 6514 3.1.3. W-, Mo-Based Oxides 6517 3.1.4. Other d0 Metal Oxides 6518 3.2. d10 Metal Oxide Photocatalyts 6518 3.3. f0 Metal Oxide Photocatalysts 6518 3.4. Nonoxide Photocatalysts 6518 4. Approaches to Modifying the Electronic Band Structure for Visible-Light Harvesting 6519

6,332 citations

Journal ArticleDOI
TL;DR: Kenji Sumida, David L. Rogow, Jarad A. Mason, Thomas M. McDonald, Eric D. Bloch, Zoey R. Herm, Tae-Hyun Bae, Jeffrey R. Long
Abstract: Kenji Sumida, David L. Rogow, Jarad A. Mason, Thomas M. McDonald, Eric D. Bloch, Zoey R. Herm, Tae-Hyun Bae, Jeffrey R. Long

5,389 citations

Book
16 Dec 1999
TL;DR: Overview of membrane science and technology membrane transport theory membrane and modules concentration polarization reverse osmosis ultrafiltration microfiltration gas separation pervaporation ion exchange membrane processes - electrodialysis carrier facilitated transport medical applications of membranes other membranes processed.
Abstract: Overview of membrane science and technology membrane transport theory membrane and modules concentration polarization reverse osmosis ultrafiltration microfiltration gas separation pervaporation ion exchange membrane processes - electrodialysis carrier facilitated transport medical applications of membranes other membranes processed.

3,680 citations

Journal ArticleDOI
TL;DR: This article reviews the progress made in CO2 separation and capture research and engineering and various technologies, such as absorption, adsorption, and membrane separation are thoroughly discussed.
Abstract: This article reviews the progress made in CO2 separation and capture research and engineering. Various technologies, such as absorption, adsorption, and membrane separation, are thoroughly discussed. New concepts such as chemical-looping combustion and hydrate-based separation are also introduced briefly. Future directions are suggested. Sequestration methods, such as forestation, ocean fertilization and mineral carbonation techniques are also covered. Underground injection and direct ocean dump are not covered.

1,899 citations

Journal ArticleDOI
22 Mar 2006-Polymer
TL;DR: A comprehensive overview on the development of polymeric membranes having advanced or novel functions in the various membrane sepn processes for liq. and gaseous mixts can be found in this paper.

1,841 citations