研究者詳細 - 神田　英輝

論文 - 神田　英輝

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Simple Extraction Method of Green Crude from Natural Blue-green Microalgae by Dimethyl Ether 査読有り

Hideki Kanda* and Peng Li

Fuel 90 巻 ( 3 ) 頁： 1264 2011年3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）

By using dimethyl ether as extractant, the green crude was successfully extracted from high-moisture natural blue-green microalgae (91.0% of water content) with a high extraction capacity at 40.1% of dry weight of the microalgae. Compared with previous methods, this method combined drying, cell disruption, and solvent extraction in one step.

DOI： 10.1016/j.fuel.2010.10.057

Deodorization and Dewatering of Biosolid by Using Dimethyl Ether 査読有り

Hideki Kanda*, Mayumi Morita, Hisao Makino, Keizo Takegami, Akio Yoshikoshi, Kazuyuki Oshita, Masaki Takaoka and Nobuo Takeda

Water Environment Research 83 巻 ( 1 ) 頁： 23 2011年1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 proposed a method for the deodorising and dewatering of biosolids. In the proposed method, liquefied dimethyl ether (DME) was used as an extractant for odorous components and water. We developed a bench-scale experiment to almost completely deodorize and dewater biosolids by using liquefied DME at room temperature. The deodorized and dewatered biosolids have sufficient caloric density and can be used as a carbon neutral fuel.

DOI： 10.2175/106143010X12609736966847

アオコからの緑の原油の高効率抽出技術

神田英輝

クリーンエネルギー 19 巻 ( 10 ) 頁： 59–63 2010年10月

Energy-Efficient Coal Dewatering using Liquefied Dimethyl Ether 査読有り

Hideki Kanda* and Hisao Makino

Fuel 89 巻 ( 8 ) 頁： 2104 2010年8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）

In this study, we dewatered sub-bituminous coal mined in Warra, Indonesia, by using liquefied dimethyl ether (DME); no heating was required in this dewatering process. We achieved this dewatering both in a laboratory-scale experiment and using previously developed bench-scale equipment. We also examined the properties of the coal before and after dewatering and measured the amount of energy required by the equipment. We found that the maximum water extraction efficiency of liquefied DME was 98.3%. Further, the properties of the coal did not change after the dewatering treatment. The wastewater obtained by dewatering can be treated by existing wastewater treatment technologies. The energy consumed by the bench-scale equipment was 2069 kJ/kg-water; thus, this dewatering process using liquefied DME was confirmed to be effective and energy efficient.

DOI： 10.1016/j.fuel.2010.02.019

微細藻類から『緑の原油』を取り出す　～簡単・省エネルギー・エコフレンドリーの三拍子～

神田英輝

電力中央研究所　環境・社会活動レポート2010 頁： 46–50 2010年8月

Dewatering of Electroplating Sludge Using Dimethyl Ether 査読有り

Kazuyuki Oshita*, Kazuya Takeda, Masaki Takaoka, Hideki Kanda, Shinsuke Morisawa, Hisao Makino, and Nobuo Takeda

Doboku Gakkai Ronbunshuu G 66 巻 ( 3 ) 頁： 96 2010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 suitability of using dimethyl ether (DME) in dewatering coal for the treatment of sewage sludge has been found empirically to be highly effective. We investigated the effectiveness of a method involving the use of DME for dewatering electroplating sludge and tried to clarify the mechanism and characteristics of the dewatering process. Two zinc-containing sludge samples were examined and the effect of the volume of liquefied DME on the dewatering process was assessed. During the initial dewatering phase, the dewatering ratio is dependent only on the saturation degree of water in liquefied DME. In the later phase, it depends proportionally on the water concentration in the sludge and has a pattern that reduces the dewatering rate as dewatering is proceeded. Moreover, the dewatering pattern can be expressed using one dewatering rate constant, k. The water contained in the sludge samples was analyzed using thermogravimetry/differential thermal analysis and the evaporation temperature range was determined. The water remaining in the samples after dewatering was found to be thermally stable and tightly bound. We further determined the amounts of total carbon and metal elements in the dewatered water and compared the concentrations to those specified in the Japan Water Pollution Quality Control Act. An important observation is that the dewatered water from the samples requires further processing before it can be discharged into the drainage system due to the presence of large amounts of Cu, Pb and Zn.

DOI： 10.2208/jscejg.66.96

アオコから緑の原油の抽出に成功

神田英輝

OHM 97 巻 ( 6 ) 頁： 2-3 2010年6月

ガソリンと同等の発熱量を持つバイオ燃料『緑の原油』

神田英輝

産業とエネルギー 24 巻 ( 4 ) 頁： 19-21 2010年6月

分子シミュレーションを活用したナノ細孔内三態相平衡・液液相平衡の熱力学モデルの構築

神田英輝

日本吸着学会誌 24 巻 ( 1 ) 頁： 11-17 2010年4月

Extraction of PCBs and Water from River Sediment Using Liquefied Dimethyl Ether as an Extractant 査読有り

Kazuyuki Ohsita*, Masaki Takaoka, Shin-ichiro Kitade, Nobuo Takeda, Hideki Kanda, Hisao Makino, Tadao Matsumoto and Shinsuke Morisawa

Chemosphere 78 巻 ( 9 ) 頁： 1148 2010年2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 investigated whether polychlorinated biphenyls (PCBs) and water could be simultaneously removed from river sediment by solvent extraction using liquefied dimethyl ether (DME) as the extractant. DME exists in a gaseous state at normal temperature and pressure and can dissolve organic substances and some amount of water; therefore, liquefied DME under moderate pressure (0.6?0.8 MPa) at room temperature can be effectively used to extract PCBs and water from contaminated sediment, and it can be recovered from the extract and reused easily. First, we evaluated the PCB and water extraction characteristics of DME from contaminated sediment. We found that 99% of PCBs and 97% of water were simultaneously extracted from the sediment using liquefied DME at an extraction time of 4320 s and a liquefied DME/sediment ratio of 60 mL g-1. The extraction rate of PCBs and water was expressed in terms of a pseudo-first-order reaction rate. Second, we estimated the amount of DME that was recovered after extraction. We found that 91?92% of DME could be recovered. In other words, approximately 5?10% of DME was lost during extraction and recovery. It is necessary to optimize this process in order to recover DME efficiently. The extraction efficiency of the recovered DME is similar to that of the pure DME. From the results, we conclude that solvent extraction using liquefied DME is suitable for extracting PCBs and water from contaminated sediment.

DOI： 10.1016/j.chemosphere.2009.12.017

Biosolid Dewatering Process Using Liquefied Dimethyl Ether as Solid Fuel 査読有り

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

Proceedings of the Water Environment Federation, Residuals and Biosolids 2010 2010 巻 ( 4 ) 頁： 734 2010年1月

液化ジメチルエーテルによる底質中PCBsの回分式抽出と溶媒再利用に関する研究

渥美幸也, 大下和徹, 高岡昌輝, 水野忠雄, 森澤眞輔, 神田英輝, 牧野尚夫

環境工学研究フォーラム 47 巻頁： 237 - 239 2010年

Dewatering of a Superabsorbent Polymer by using Liquefied Dimethyl Ether 査読有り

Hideki Kanda*, Kazuyuki Oshita, Kazuya Takeda, Masaki Takaoka, Hisao Makino, Shinsuke Morisawa and Nobuo Takeda

Dry. Technol. 28 巻 ( 1 ) 頁： 30 2009年12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）

In this study, we evaluated the applicability of the dimethyl ether (DME) dewatering method originally developed for high-moisture coal to superabsorbent polymer (SAP) and disposable diapers. It was found that liquefied DME successfully extracts water from SAP and disposable diapers. However, the polypropylene outer film and polyurethane used in diapers tended to dissolve in the liquefied DME and were subsequently released with the water discharged. These compounds are highly viscous, making it difficult to remove them from the drain outlet of the prototype. Therefore, the mechanics of the drain outlet should be considered in future studies.

DOI： 10.1080/07373930903423814

液化ジメチルエーテルを利用する環境対策技術

神田英輝, 牧野尚夫

粉体工学会誌 46 巻 ( 11 ) 頁： 825-827 2009年11月

Triple Point of a Lennard-Jones Fluid in Nanopores with Zero Excess Pore Wall Energy 査読有り

Hideki Kanda* and Minoru Miyahara

Adsorpt. Sci. Technol. 27 巻 ( 8 ) 頁： 735 2009年10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 examined the triple points of Lennard-Jones methane confined in slit-shaped nanopores, i.e. nanopores with zero excess potential energy, using a molecular dynamics technique developed by us in a previous study. The critical condensates in the pores were cooled in a stepwise manner and the triple points determined for different pore sizes. We observed that the triple point temperature was inversely related to the pore size, identical to the Gibbs-Thomson equation. Whilst the Gibbs-Thomson equation requires adjustable parameters, our triple point model could predict the pressure and temperature without the need for such parameters. As a consequence, our model demonstrates a higher degree of generalization than the Gibbs-Thomson equation.

DOI： 10.1260/0263-6174.27.8.734

Clean up Process for Oil-polluted Materials by Using Liquefied DME 査読有り

Hideki Kanda* and Hisao Makino

Journal of Environment and Engineering 4 巻 ( 2 ) 頁： 356 2009年9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 proposed technology is a new concept that aims at energy-efficient drying and cleanup for general purposes by the use of liquefied DME (dimethyl ether) gas. Large amounts of energy are required for the cleanup of the ground since the water contained in the soil hinders the extraction processes that use hydrophobic organic solvents. Therefore, we focus on the use of liquiefied DME, which is eco-friendly, as an extractant. The saturated pressure of DME is moderate?0.51 MPa at 20°C and 0.68 MPa at 30°C. Liquefied DME resolves high volume organic contaminants and water. Moreover, water can be easily separated from DME by flash distillation. This technology reduces the energy required for water-removal to half the latent heat of water. We almost completely removed water and other oily materials by using DME. DME was completely recycled and none of it remained in these materials. The world's first prototype of a DME deoiling/dewatering process is shown. The capacity of this system is 10 L. Because of the low normal boiling point (-25°C) of DME, it does not remain in the soil and it can thus be reused as an extractant. In this presentation, we show the general purpose deoiling and dewatering processes for several materials.

DOI： 10.1299/jee.4.356

火力発電の高効率化と環境負荷低減策の進展

神田英輝

科学と工業 83 巻 ( 7 ) 頁： 321-325 2009年7月

液化ジメチルエーテルの種々の汚泥に対する脱水特性とその再利用性

大下和徹, 武田和也, 高岡昌輝, 森澤眞輔, 神田英輝, 牧野尚夫

環境衛生工学研究 23 巻 ( 3 ) 頁： 100-103 2009年7月

常温・省エネルギー脱水技術の開発状況－期待されるＤＭＥ脱水法－

神田英輝, 牧野尚夫

下水道（環境新聞社） 32 巻 ( 7 ) 頁： 43-45 2009年6月

液化ジメチルエーテルを使い油汚染土壌を浄化する技術

神田英輝, 牧野尚夫

高圧ガス（高圧ガス保安協会誌） 46 巻 ( 3 ) 頁： 29-32 2009年3月

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