研究者詳細 - 成瀬　一郎

論文 - 成瀬　一郎

分割表示 526 件中 101 - 120 件目／全件表示 >>

Slagging behavior of upgraded brown coal and bituminous coal in 145MW practical coal combustion boiler

Akiyama K., Pak H., Takubo Y., Tada T., Ueki Y., Yoshiie R., Naruse I.

Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion 頁： 77 - 82 2012年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion

The purpose of this study is to quantitatively evaluate behaviors of ash deposition during combustion of Upgraded Brown Coal (UBC) and bituminous coal in a 145 MW practical coal combustion boiler. A blended coal consisting 20 wt% of the UBC and 80 wt% of the bituminous coal was burned for the combustion tests. Before the actual ash deposition tests, the molten slag fractions of ash calcualted by chemical equilibrium calculations under the combustion condition was adopted as one of the indices to estimate the tendency of ash deposition. The calculation results showed that the molten slag fraction for UBC ash reached approximately 90% at 1523 K. However, that for the blended coal ash became about 50%. These calculation results mean that blending the UBC with a bituminous coal played a role in decreasing the molten slag fraction. Next, the ash deposition tests were conducted, using a practical pulverized coal combustion boiler. A water-cooled stainless-steel tube was inserted in locations at 1523 K in the boiler to measure the amount of ash deposits. The results showed that the mass of deposited ash for the blended coal increased and shape of the deposited ash particles on the tube became large and sperical. This is because the molten slag fraction in ash for the blended coal at 1523 K increased and the surface of deposited ash became sticky. However, the mass of the deposited ash for the blended coal did not greatly increase and no slagging problems occurred for 8 days of boiler operation under the present blending conditions. Therefore, appropriate blending of the UBC with a bituminous coal enables the UBC to be used with a low ash melting point without any ash deposition problems in a practical boiler. © Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg 2012.

Scopus

膜分離を伴う溶媒抽出による廃潤滑油の再生処理 Open Access

義家亮, 植木保明, 三輪高裕, 成瀬一郎

日本機械学会論文集Ｂ編 78 巻 ( 789 ) 頁： 1048 - 1052 2012年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人日本機械学会

A process to recover base oil from waste lubricating oil is proposed in this study, which is based on solvent extraction with membrane. In this process, organic solvent is circulated in a closed loop, leading to a resource saving. Residue consists of only impurities in waste lubricating oil, such as suspended particles, aqueous droplets, soot and tar, leading to a waste reducing. This process includes a fractional distillation, too, but it is for separating out organic solvent from oils. Then, temperature for fractional distillation is lower than 100 °C, leading to an energy saving. Rubber film is utilized as membrane, whose polymer network structure works as filter to separate impurities from oil dissolved in solvent. In order to verify the feasibility of this process, effect of extraction period, solvent volume and extraction temperature on both yield and quality of the extracted oil was experimentally estimated. © 2012 The Japan Society of Mechanical Engineers.

DOI： 10.1299/kikaib.78.1048

Scopus

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国際協力機構・インドネシア高等教育開発計画プロジェクトに携わって

成瀬一郎

日本エネルギー学会誌 = Journal of the Japan Institute of Energy 89 巻 ( 10 ) 頁： 947 2010年10月

Reaction characteristic of woody biomass with CO<inf>2</inf>and H <inf>2</inf>O

Naruse I., Ueki Y., Isayama T., Shinba T., Kihedu J., Yoshiie R.

Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 96 巻 ( 4 ) 頁： 151 - 154 2010年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan

Objective in this study is to elucidate the fundamental gasification characteristics for carbonaceous resources. Effects of temperature and gaseous agents on the gasification characteristics of carbonaceous materials were experimentally and theoretically studied by the gasification of woody sawdust, using an electrically heated drop tube furnace. Results of the co-gasification of CO2 with H2O were compared by the gasification by a single gaseous agent such as CO2 or H2O. As a result, H2 and CO concentrations increased with an increase of temperature. CO concentration under the co-gasification condition produced more than that under the single gasification condition. The H2 formation showed the opposite tendency to the CO formation during the co-gasification. This synergy effect was also elucidated theoretically by the simulation of reaction kinetics. The simulated temperature indicating the maximum synergy effect on CO formation agreed well with that obtained by the experiments.

Scopus

乾燥下水汚泥燃焼域における窒素酸化物の生成・消滅特性とその機構

成瀬一郎, 平林美和, 義家亮, 植木保昭

廃棄物資源循環学会論文誌 21 巻 ( 6 ) 頁： 193 - 201 2010年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人廃棄物資源循環学会

乾燥下水汚泥の燃焼域における窒素酸化物，特にN2Oの生成・消滅特性について，その機構を明らかにすることを目的とし，窒素雰囲気下で熱分解実験および空気比1.2での燃焼実験をそれぞれ行った。乾燥汚泥粒子が電気炉内に供給されると，瞬時に粒子温度が上昇し膨潤して，バルーン構造のチャー粒子になることを観察した。これは，汚泥中可燃分の約7割が揮発分であることと高温で溶融しやすい炭素質であることによるものと考察している。N2Oは火炎帯内で生成し，その後，NOが生成した。これはN2Oが生成した後に生じるCOの酸化反応で生成するHラジカルによる分解やNOへの酸化が生じたことによる。汚泥中N分のN2Oへの転換率は炉壁温度の上昇とともに低下したが，NOへの転換率は上昇した。また，汚泥はN2Oが生成しやすいHCNを熱分解時に高濃度で生成するので，これが石炭から生成するN2Oよりも高くなっている理由であると考察する。

DOI： 10.3985/jjsmcwm.21.193

CiNii Research

木質バイオマスのＣＯ２およびＨ２Ｏとの反応特性

成瀬一郎, 植木保昭, 伊佐山勉, 榛葉貴紀, 義家亮

鉄と鋼 96 巻 ( 4 ) 頁： 150 - 155 2010年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人日本鉄鋼協会

Synopsis : Objective in this study is to elucidate the fundamental gasification characteristics for carbonaceous resources. Effects of temperature and gaseous agents on the gasification characteristics of carbonaceous materials were experimentally and theoretically studied by the gasification of woody sawdust, using an electrically heated drop tube furnace. Results of the co-gasification of CO2 with H2O were compared by the gasification by a single gaseous agent such as CO2 or H2O. As a result, H2 and CO concentrations increased with an increase of temperature. CO concentration under the co-gasification condition produced more than that under the single gasification condition. The H2 formation showed the opposite tendency to the CO formation during the co-gasification. This synergy effect was also elucidated theoretically by the simulation of reaction kinetics. The simulated temperature indicating the maximum synergy effect on CO formation agreed well with that obtained by the experiments. © 2010, The Iron and Steel Institute of Japan. All rights reserved.

DOI： 10.2355/tetsutohagane.96.150

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流動層燃焼炉における炉内脱硫特性の理論的考察

村上高広, 栗田典之, 成瀬一郎

高温学会誌 36 巻 ( 1 ) 頁： 41 - 46 2010年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人スマートプロセス学会（旧高温学会）

Sulfur oxides (SOx) are one of the main sources of acid rain. In a fluidized bed combustor, limestone is a directly supplied into the combustor, as a desulfurizer in order to decrease the emissions of SOx from fuel, such as sewage sludge and coal. In our previous studies, NaCl-doped limestone has a good performance on the desulfurization characteristics. In the present study, the effect of alkali metal compounds NaCl, KCl and LiCl-dopings on the formation of CaO crystal structure was simulated by the molecular dynamics method. The result indicates that KCl in KCl-doped CaO deforms more largely the CaO crystal structure than NaCl, because K atom tends to separate from Cl atom at high temperature due to larger ionic radius of K than that of Na. For LiCl-doped CaO, LiCl also deforms the CaO crystal structure, because Li, whose ionic radius is smaller than that of Na, can move freely inside the CaO crystal lattice at high temperature. Based on the results obtained by the molecular dynamics simulations, only the NaCl-doping into CaO has a positive effect on the CaO crystallization. Consequently, this NaCl-doping may enhance the desulfurization efficiency. From this viewpoint, the molecular dynamics simulation can well explain the relationship between the desulfurization efficiency of CaO and the effect of alkali metal compounds addition into CaO.

DOI： 10.7791/jhts.36.41

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Using sorbents to control heavy metals and particulate matter emission during solid fuel combustion

Yao Hong, Naruse Ichiro

PARTICUOLOGY 7 巻 ( 6 ) 頁： 477 - 482 2009年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Particuology

Some of the heavy metals in coal and wastes vaporize during combustion, concentrate in fine particulates, and emit with the flue gas into the atmosphere, to produce adverse effect on environment and health. This study first investigates the fate of the heavy metal species, especially Pb, Cd and Cr, known as semi-volatile, in various flue gases, especially in the presence of HCl and SO2, by chemical equilibrium calculation, in which, Si and Ca were proposed as base sorbent materials to capture Pb, Cd and Cr. Then Si- and Ca-based compounds as well as waste materials used as sorbents were optimized to capture the heavy metals. Finally, the optimal sorbent was tested in actual burning of dried sewage sludge as solid fuel, to evaluate the effectiveness of the sorbent. Calculated results show that Cl increases the volatility of most heavy metals, while SO2 enhances formation of condensed phases. Among the sorbents tested, kaolin appears most efficient to capture Pb and Cd. For sludge combustion with kaolin addition, both Pb and Cd were shifted from sub-micron to macro-sized particles, and accompanied by considerable decrease of 0.1 μm particles. © 2009.

DOI： 10.1016/j.partic.2009.06.004

Web of Science

Scopus

名古屋大学大学院工学研究科機械理工学専攻機械科学分野環境・エネルギー工学講座 : 高温エネルギー変換工学研究グループ(成瀬・義家研究室)

成瀬一郎

日本エネルギー学会誌 = Journal of the Japan Institute of Energy 88 巻 ( 1 ) 頁： 81 - 84 2009年1月

界面反応を伴う石炭灰付着機構の解明

長沼宏, 池田信矢, 伊藤正, 佐藤文夫, 浦島一晃, 多久和毅志, 義家亮, 成瀬一郎

日本エネルギー学会誌 88 巻 ( 9 ) 頁： 816 - 822 2009年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人日本エネルギー学会

In order to control ash deposition on heat exchanger tubes in coal or woody biomass combustion boilers, surface treatment of the tubes, using a thermal spraying technique, was proposed in this study. The ash deposition mechanisms were elucidated, based on physical and chemical aspects, under the condition of long exposure period First, adhesive force (Sb) between ash and alloy surface at high temperature was measured. As the physical aspect, Sb increased with an increase of the exposure time and could be predicted by an improved logistic function. Moreover, Sb depended on the temperature, so that an interface reaction controlled the increasing rate of adhesive force. As the chemical aspect, the interface between the ash deposition and alloy was observed and analyzed by a SEM-EDS and a FE-EPMA to consider the mechanisms of an increase of the adhesive force. The result showed that S and Na contained in the ash composition diffused into the alloy and that Fe mainly composing of the alloy specimens also diffused into the ash deposition. The diffusion coefficient of Fe into the ash deposition was also calculated by the results of a point elemental analysis. These results suggested that the interfacial reactions of the ash particles with the alloy affected the increase of adhesive force.

DOI： 10.3775/jie.88.816

Scopus

CiNii Research

充填層式木質バイオマスガス化炉の反応挙動解明(熱工学,内燃機関,動力など)

多久和毅志, 鳥越隆志, 義家亮, 成瀬一郎

日本機械学会論文集Ｂ編 75 巻 ( 752 ) 頁： 810 - 816 2009年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人日本機械学会

Gasification technology is recognized as one of the candidates to utilize the biomass effectively. From this viewpoint, this study focused fundamentals on woody biomass gasification, using a lab- scale packed bed. In this experiment, pellets of black pine are gasified, using air as the gasification agent. The gasification tests were carried out under both updraft and downdraft conditions. The temperature distribution inside the gasifier and the compositions of gasified gas were measured and analyzed during gasification by thermo couples inserted from a furnace wall and a micro gas chromatograph, respectively. The produced gasses before cooling were also sampled to analyze amount of tar generation in the gasses. As a result, the lower heating value of the produced gas under the downdraft condition was higher than that under the updraft condition. It was easier to operate under the downdraft condition than under the updraft. Under the updraft condition, bridging phenomenon happened. Amount of tar generation under the downdraft condition was lower than that under the updraft. This is because tar passes through a partial combustion zone or higher temperature zone in the downdraft gasifier.

DOI： 10.1299/kikaib.75.752_810

Scopus

CiNii Research

燃焼プロセスにおける微量成分を含む微粒子の生成挙動と炉内吸収技術

成瀬一郎

工業加熱 46 頁： 31 - 37 2009年

界面反応を伴う石炭灰付着機構の解明査読有り

義家亮, 成瀬一郎

日本エネルギー学会誌 88,2 頁： 816 - 822 2009年

No.64 燃焼灰付着挙動の炭種依存性(灰・微量金属(1))

長沼宏, 池田信矢, 成瀬一郎, 義家亮, 植木保昭, 松浦幹夫, 伊藤正, 佐竹英

石炭科学会議発表論文集 46 巻 ( 0 ) 頁： 126 - 127 2009年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人日本エネルギー学会

In pulverized coal fired boilers, molten ash particles generated during combustion have possibility of adhesion on surface of heat exchanger tubes. This causes problems of heat transfer inhibition such as slagging and fouling as well as boiler trouble on operation. In order to solve this problem, surface treatment technology of the heat exchanger tubes is developed in this study. This paper describes dependence of the adhesive force between the deposition layer and the tube surface on the coal types.

DOI： 10.20550/jiesekitanronbun.46.0_126

CiNii Research

膜分離を伴う溶媒抽出による廃潤滑油の再生処理

三輪高裕, 義家亮, 植木保昭, 成瀬一郎

廃棄物資源循環学会研究発表会講演集 20 巻 ( 0 ) 頁： 125 - 125 2009年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人廃棄物資源循環学会

現在，潤滑油は多岐にわたって使用されており，国内で年間105万kLの廃潤滑油が発生している[1]．発生した廃潤滑油の大部分は再生重油等燃料などへサーマルリサイクルされており，再生潤滑油としての再生割合は約７％に留まる．今日において白土処理，硫酸処理などの廃潤滑油再生処理方法が実用化されているが，簡便さ，経済性，環境性を考慮するといずれも多くの課題を抱えている．本研究で提案する膜分離を伴う溶媒抽出による廃潤滑油再生処理は，溶媒抽出の際に使用する有機溶媒のほぼ100％がプロセス内で循環するため省資源であり，残渣は廃油中の不純物成分のみであることから廃棄物を低減できる．さらに有機溶媒の沸点（100℃未満）程度の低温プロセスで運転可能である．このような利点を持ち合わせた提案プロセスの実現のため，本研究では廃潤滑油の膜分離を伴う溶媒抽出に関する不純物除去特性を実験的に検討した．

DOI： 10.14912/jsmcwm.20.0.125.0

CiNii Research

No.73 石炭燃焼に伴うホウ素の揮発特性(灰・微量金属(3))

野田直希, 松田裕光, 伊藤茂男, 植木保昭, 義家亮, 成瀬一郎

石炭科学会議発表論文集 46 巻 ( 0 ) 頁： 144 - 145 2009年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人日本エネルギー学会

Boron contained in coal are partly released to the flue gas during combustion. Boron are captured in flue gas cleaning systems and the emissions of these elements are generally low. However, it is important to understand the behavior of boron to improve the reliability of the gas cleaning systems. Though a lot of researches examined the behavior of boron, the behavior of these elements in coal combustion has not been clarified in detail yet. In this research, the release behavior of boron from coal was investigated using a drop tube furnace (DTF). As a result, it is thought that a part of the boron would be absorbed in molten slag during combustion.

DOI： 10.20550/jiesekitanronbun.46.0_144

CiNii Research

環境化学工学

竹下健二, 江頭靖幸, 下ヶ橋雅樹, 成瀬一郎

化学工学 = CHEMICAL ENGINEERING OF JAPAN 72 巻 ( 10 ) 頁： 570 - 574 2008年10月