Faculty Profiles - KANDA Hideki

Papers - KANDA Hideki

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ＤＭＥ利用型脱水プロセスの試作機による石炭脱水特性の解明

神田英輝、牧野尚夫

電力中央研究所報告 Vol. M08020 page： 1-9 2009.3

Sewage Sludge Dewatering Process Using Liquid Di-Methyl Ether as Solvent Reviewed

Kazuyuki Oshita*, Masaki Takaoka, Hideki Kanda, Yusuke Nakajima, Nobuo Takeda, and Hisao Makino

Journal of Japan Sewage Works Association-Research Vol. 46 ( 556 ) page： 71 2009.2

Energy-saving dewatering technology for sewage sludge using liquefied dimethyl ether Reviewed

Hideki Kanda*, Hisao Makino, Mayumi Morita, Keizou Takegami, Nobuo Takeda, and Kazuyuki Oshita

J. Japan Soc. of Waste Management Experts Vol. 19 ( 6 ) page： 409 2008.12

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We applied DME (dimethyl ether)-based dewatering technology, which has been developed for highmoisture coal, to dewatered sewage sludge and successfully decreased the water content of sewage sludge from 78wt% to 30wt%. Moreover, we clarified that five minutes is enough to dewater sewage sludge as contact time. In addition, the dried sewage sludge was deodorized. Since the temperature of sewage water is approximately constant throughout the year, sewage water and air can be used as sources of heat for the evaporation and condensation of DME. Thus, DME-based dewatering technology can be thought of not only as a dewatering technology but also as a technology for recovery of heat from sewage water.

DOI： 10.3985/jswme.19.409

Application of extraction technology using liquid dimethyl ether to PCBs from river sediment Reviewed

Masaki Takaoka, Kazuyuki Oshita, Shin-ichro Kitade, Nobuo Takeda, Hideki Kanda, Hisao Makino, Tadao Matsumoto and Shinsuke, Morisawa

Organohalogen Compounds Vol. 80 page： 2264-2267 2008.12

Liquid-Liquid Phase Separation of Binary Lennard-Jones Fluid in Slit Nanopores Reviewed

Hideki Kanda* and Hisao Makino

Adsorption Vol. 14 ( 4-5 ) page： 485 2008.10

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

The capillary phase separation of a binary mixture of two truncated and shifted Lennard-Jones (LJ) Ar liquids in slit-shaped oxygen nanopores is examined. The LJ parameters?ε(Ar(A)?Ar(A))=ε(Ar(B)?Ar(B))=0.8ε(Ar(A)?Ar(B)) and 0.5ε(Ar(A)?O)?=?ε(Ar(B)?O)?were used to distinguish the two Ar liquids. The cut off distance for Ar was 3.5σ. We employed a molecular dynamics (MD) technique in which a pore space was connected with a bulk solution to easily determine the equilibrium bulk concentration. Liquid phase isotherms were obtained for pores with widths ranging from 5.5σ to 9.5σ, and the relation between the pore width and the phase separation concentration was determined. Each simulation was run until the bulk concentration attained equilibrium (1?2 μs). The MD results show that the Patrick model overestimates the bulk concentration for a given pore size. We proposed a modified Patrick model in which the pore wall potential is considered. In our model, the Gibbs-Tolman-Koenig-Buff effect is not considered for the interfacial tension since two surfaces of tension exist on both sides of the equimolar dividing surface of the two-Ar liquid phase. The two surfaces of tension neutralized Gibbs-Tolman-Koenig-Buff effect each other. The present simple model successfully describes the relation to prove its reliability.

DOI： 10.1007/s10450-008-9121-1

Energy-Saving Drying Technology of Porous Media by Using Liquefied DME Reviewed

Hideki Kanda*, Hisao Makino and Minoru Miyahara

Adsorption Vol. 14 ( 4-5 ) page： 467 2008.10

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Process design and energy requirement for a practical plant are investigated for an energy-saving drying (dewatering) process invented by the authors in 2002 for high-moisture porous materials. The basic concept of the process involves the extraction of water from a high-moisture porous material by bringing it in physical contact with liquefied dimethyl ether (DME) at room temperature. Water content of DME asymptotically increases to the saturation value and the high-moisture porous material is dried almost perfectly. DME from the DME-water mixture is vaporized by decompression. DME and water are separated by flash distillation. DME vapor is compressed and cooled in a heat exchanger, and the latent heat of condensation is reused to vaporize the DME in the heat exchanger. Multistage compression and multistage flash distillation are employed. After compression, the temperature of DME is less than 50?°C. Because specific heat ratio of DME is only 1.11, the energy consumption of the compressor is reduced. Considering the adiabatic efficiency of the compressor and the net thermal efficiency, the total energy for dewatering is about 1100 kJ per 1-kg-water-content of the material being dewatered This process has significant potential and is compact than the existing dewatering processes.

DOI： 10.1007/s10450-008-9120-2

液化ジメチルエーテル脱水法が下水汚泥の性状に与える影響

中島祐輔, 大下和徹, 高岡昌輝, 森澤眞輔, 武田信生, 神田英輝, 牧野尚夫

環境衛生工学研究 Vol. 22 ( 3 ) page： 64-67 2008.7

液化ジメチルエーテルを用いたＰＣＢ汚染底質処理の基礎検討

大下和徹, 高岡昌輝, 北出真一郎, 武田信生, 神田英輝, 牧野尚夫, 松本忠生, 森澤眞輔

環境衛生工学研究 Vol. 22 ( 3 ) page： 144-147 2008.7

Super-energy-saving Dewatering Method for High-specific-surface-area Fuels by using Dimethyl Ether Reviewed

Hideki Kanda*

Adsorpt. Sci. Technol. Vol. 26 ( 5 ) page： 345 2008.6

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

There is a growing need for the economical dewatering of high-specific-surface-area fuels containing large amounts of water, such as coal and sewage sludge. The principle underlying conventional dewatering methods is evaporation of the water content by heating the fuels to a high temperature, but this approach consumes a considerable amount of energy. The Central Research Institute of the Electric Power Industry (CRIEPI) has developed a method for the extraction of this water through the use of dimethyl ether (DME), which liquefies at ordinary temperatures under the influence of a slight pressure. In this method, the water content in the fuel is extracted into the liquefied DME for separation from the fuel. After dewatering, the DME is depressurised, and subsequently vaporised, thereby leaving the separated water. Dewatering with an input energy of only 1109 kJ/kg water under ordinary conditions has been demonstrated theoretically.

DOI： 10.1260/026361708787548792

液化ジメチルエーテルを用いた脱水技術の開発

神田英輝

産業とエネルギー Vol. 22 ( 2 ) page： 48-51 2008.3

抽出用液化ＤＭＥを再生利用する常温油除去プロセスの開発

神田英輝、牧野尚夫

電力中央研究所報告 Vol. M07009 page： 1-7 2008.3

液化ＤＭＥ脱水技術の氷点下での凍結固体燃料脱水への適応性評価

神田英輝、牧野尚夫

電力中央研究所報告 Vol. M07013 page： 1-6 2008.3

ナノ細孔内における単純流体の相図と相平衡の熱力学：ミクロ不均一現象からマクロ制御因子への橋渡し

宮原稔, 神田英輝

表面 Vol. 46 ( 1 ) page： 1-18 2008.1

Super energy-saving dewatering process for high-moisture coal using DME Reviewed

Hideki Kanda and Hisao Makino

Peer reviewed Proceedings of the 4th Joint China/Japan Chemical Engineering Symposium page： TQ536 2007.12

液化ジメチルエーテル(DME)を用いた脱水技術を開発

神田英輝

電中研ニュース Vol. 445 page： 1-4 2007.12

液化ＤＭＥ利用型・超高効率常温脱水プロセスの開発

神田英輝

日本機械学会誌 Vol. 110 page： 878 2007.11

液化ＤＭＥ利用型・超高効率常温脱水プロセス

神田英輝

OHM Vol. 94 ( 9 ) page： 10-11 2007.9

Freezing of Lennard-Jones Fluids in Cylindrical Nanopores under tensile condition Reviewed

Hideki Kanda and Minoru Miyahara

Adsorption Vol. 13 ( 3-4 ) page： 191-195 2007.7

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We have shown the Lennard-Jones (LJ) phase diagram for a slit-shaped nanopore by molecular simulations and thermodynamically predicted the results with no adjustable parameter. With this success, LJ phase diagrams are predictable. In this study, the freezing of an LJ CH4 capillary condensate under a tensile condition in a nonstructural carbon nanopore with a cylindrical geometry was examined using molecular dynamics (MD) simulation. We employ a unit cell in contact with a bulk vapor phase, which is useful for the determination of the bulk vapor pressure in equilibrium with the molecules in a pore. The MD simulation results show liquid-solid (amorphous) phase transitions with a variation in the bulk vapor pressure. The frozen particles are arranged in concentric circular regions along the wall similar to those reported by Maddox and Gubbins. The freezing points are determined from the variations in density, enthalpy, arrangement, and structural functions. The obtained liquid-solid coexistence points are found to exhibit a significant dependence of the freezing point on the equilibrium bulk vapor pressure, forming an extraordinarily skewed curve on the p-T diagram, in contrast to the bulk phase coexistence that is represented by an almost vertical line. The origin of the significant dependence is considered to be the Laplace effect on the capillary condensate similar to the case with a slit-shaped pore. A simple model, which the authors earlier presented for slit-shaped nanopores, successfully predicted the p-T relation of the freezing point for cylindrical nanopores as well.

DOI： 10.1007/s10450-007-9066-9

液化ＤＭＥを水分抽出剤として利用する超高効率・常温脱水プロセスの開発

神田英輝

表面 Vol. 45 ( 8 ) page： 14-24 2007.4

液化ＤＭＥを利用する常温動作・超高効率多孔質固体脱水プロセスの開発

神田英輝

日本吸着学会誌 Vol. 21 ( 4 ) page： 10-15 2007.4

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