研究者詳細 - 神田　英輝

論文 - 神田　英輝

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

Hideki Kanda*

Adsorpt. Sci. Technol. 26 巻 ( 5 ) 頁： 345 2008年6月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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 22 巻 ( 2 ) 頁： 48-51 2008年3月

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 M07009 巻頁： 1-7 2008年3月

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 M07013 巻頁： 1-6 2008年3月

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 46 巻 ( 1 ) 頁： 1-18 2008年1月

Super energy-saving dewatering process for high-moisture coal using DME 査読有り

Hideki Kanda and Hisao Makino

Peer reviewed Proceedings of the 4th Joint China/Japan Chemical Engineering Symposium 頁： TQ536 2007年12月

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 445 巻頁： 1-4 2007年12月

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 110 巻頁： 878 2007年11月

液化ＤＭＥ利用型・超高効率常温脱水プロセス

神田英輝

OHM 94 巻 ( 9 ) 頁： 10-11 2007年9月

電中研、DME使用の高効率常温脱水法を開発招待有り査読有り

神田英輝

月刊エネルギー 40 巻 ( 8 ) 頁： 144 - 145 2007年8月

Freezing of Lennard-Jones Fluids in Cylindrical Nanopores under tensile condition 査読有り

Hideki Kanda and Minoru Miyahara

Adsorption 13 巻 ( 3-4 ) 頁： 191-195 2007年7月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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 45 巻 ( 8 ) 頁： 14-24 2007年4月

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 21 巻 ( 4 ) 頁： 10-15 2007年4月

液化ＤＭＥを水分抽出剤として用いる高水分炭の脱水プロセスの概念設計と所要動力の試算

神田英輝、牧野尚夫

電力中央研究所報告 M06004 巻頁： 1-11 2007年3月

Sublimation Phenomena of Lennard-Jones Fluids in Slit Nanopores 査読有り

The Journal of Chemical Physics 126 巻 ( 5 ) 頁： 054703 2007年2月

Solid-Phase Formation in Nanospace -Phase Diagram of Confined Lennard-Jones Fluids 査読有り

Minoru Miyahara*, Hideki kanda

Peer reviewed 3rd China/Japan Joint Chemical Engineering Symposium 頁： TQ021 2005年12月

Sublimation Phenomena in Slit Nanopores - Lennard-Jones Phase Diagram - 査読有り

Hideki Kanda*, Minoru Miyahara, and Ko Higashitani

Adsorption 11 巻 ( Suppl. 1 ) 頁： S295 2005年7月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

Sublimation phenomena of Lennard-Jones fluids in slit-shaped nanopores were examined. Vapor-phase pressure at which a solid phase forms in a pore at a constant temperature is determined by the authors' molecular dynamics technique. The obtained phase-boundary pressure is remarkably lower than that of the bulk phase. A simple model of the sublimation is presented, which successfully predicts the molecular dynamics results with no adjustable parameter. Thus, a whole Lennard-Jones phase diagram in slit-shaped nanopores can now be predicted.

DOI： 10.1007/s10450-005-5940-5

Method of Preventing Coal Ash Hardening by Humidifying or Mixing with Additives 査読有り

Yoshiyuro Kishi, Hideki Kanda*, Hiromi Shirai, Yoshimichi Daijyou

Journal of Society of Powder Technology, Japan 42 巻 ( 7 ) 頁： 460 2005年7月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

The aim of this study is to prevent the hardening of coal ash during transportation from power plants and storage. In order to prevent the coal ash from hardening, humidification and mixing with additives were applied. As a result, (1) humidification of coal ash at 40°C with air of 50-90%RH, the hardenability of coal ash greatly decreased because sulfur trioxide on the surface of the coal ash reacted with alkaline components such as calcium carbonate by humidification, (2) miximg coal ash with lime stone is the most effective method in reducing the hardenability because it reacts with the sulfur trioxide. The addition of 1-10% lime stone is necessary to prevent hardening.

DOI： 10.4164/sptj.42.460

Numerical Analysis of Coal Ash Bed Hardening by Water Condensation 査読有り

Masashi Wada, Hideki Kanda*, Mitsuhiko Hata, Hisao Makino, Chikao Kanaoka

Journal of Society of Powder Technology, Japan 42 巻 ( 5 ) 頁： 317 2005年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

In this study, hardening phenomena of coal ash beds in high-humidity condition are examined. We employ a diffusion simulation in clarifying the distribution of condensed water in coal ash beds, in which water vapor is absorbed into sulfur trioxide adhered on the surface of coal ash particles. Aqueous sulfuric acids solution formed by the absorption is in equilibrium with the ambient water vapor. The diffusion rate of water vapor is proportional to the difference between the pressure and ambient water vapor pressure. The simulation successfully describes the results of previous experiment, at a constant temperature, with the variations in the equilibrium moisture and particle diameter of coal ash. Moreover, it is clarified that the relationship between water content and hardening phenomena is very similar for various coal ashes, with a correction of particle diameter of coal ash and the volume of condensate bridging between particles.

DOI： 10.4164/sptj.42.317

液化ＤＭＥ脱水法による石炭脱水機構－分子動力学による脱水挙動の把握と脱水平衡式の構築－

神田英輝、白井裕三、日恵井佳子

電力中央研究所報告 W04012 巻頁： 1-8 2005年3月

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