研究者詳細 - 成瀬　一郎

論文 - 成瀬　一郎

分割表示 526 件中 121 - 140 件目／全件表示 >>

Role of Methanol in Supercritical Water Oxidation of Ammonia

Taro Oe, Hiroshi Suzugaki, Ichiro Naruse, Armando T. Quitain, Hiroyuki Daimon, Koichi Fujie

Industrial & Engineering Chemistry Research 46 巻 ( 11 ) 頁： 3566 - 3573 2007年4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：American Chemical Society (ACS)

The role of methanol (MeOH) in the supercritical water oxidation (SCWO) of ammonia (NHs) was investigated near the typical operating conditions of a commercial plant at 560-620°C and 25 MPa using a tubular reactor. It was found that the presence of MeOH strongly affected the reaction behavior of nitrogen. With the addition of MeOH, at concentrations more than twice the initial concentrations of NH3 (1.4-5.7 mmol/mol of the feed mixture), the conversion of NH3 to N2O increased by about four times to 0.5-0.6 compared to that with no MeOH addition. The production of NO3- from NH3 increased in the liquid effluent with a conversion of up to 0.2. The productions of NO2-, NO, and NO2 from NH3 had similar behavior under the presence of MeOH at the tested conditions, and significant effects were observed at MeOH concentrations more than 2-6 times of the initial concentrations of NH3. The experimental results made it clear that NO and NO 2 were produced under the SCWO conditions. Methods for the reduction of N2O and NO3- were also investigated. Results showed that SCWO is not suitable for the decomposition of N2O. Other post-treatment methods such as catalytic decomposition should be applied to reduce N2O in the gas effluent. NO3- reduction methods (e.g., two-step reaction) proposed in this study should also be considered to prevent corrosion of the reactor material. © 2007 American Chemical Society.

DOI： 10.1021/ie070168u

Scopus

CiNii Research

P224 バイオマス充填層ガス化炉による基礎ガス化実験(ポスター発表)

鳥越隆志, 成瀬一郎

バイオマス科学会議発表論文集 2 巻 ( 0 ) 頁： 88 - 89 2007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

The biomass gasification has recently been recognized as one of the candidate technologies to utilize the biomass effectively. In this study, pellets of black pine are gasified in a packed-bed gasifier, using air as gasification agent. In the gasification tests, the temperature distribution in the gasifier and the compositions in the gasified gas are measured and analyzed during gasification by thermo-couples and a micro gas chromatograph, respectively. Fundamental gasification characteristics in the packed-bed were discussed by those results obtained.

DOI： 10.20550/jiebiomassronbun.2.0_88

CiNii Research

O211 電気加熱式ドロップチューブ反応炉によるCO_2および水蒸気を用いた木質バイオマスの基礎ガス化特性(セッション4:技術～基礎～,口頭発表)

榛葉貴紀, 成瀬一郎

バイオマス科学会議発表論文集 2 巻 ( 0 ) 頁： 36 - 37 2007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

Fundamental gasification characteristics in CO_2 and H_2O atmospheres at high temperature are experimentally studied, using an electric heated drop tube furnace. The gasification experiments are performed, changing temperature at the furnace wall, gasification agents and residence time. Hinoki sawdust is selected as a fuel. In the experiments, the gas composition and the elemental compositions in the residual reaction particles are analyzed. The result shows that co-existence of CO_2 with H_2O can enhance the gasification performance, compared with the individual gasification characteristics.

DOI： 10.20550/jiebiomassronbun.2.0_36

CiNii Research

燃焼プロセスにおける微量金属成分の挙動と制御

成瀬一郎

Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｉｎｏｒｇａｎｉｃ　Ｍａｔｅｒｉａｌｓ，　Ｊａｐａｎ 14 巻 ( 328 ) 頁： 177 - 183 2007年

大気環境

成瀬一郎

化学工学 = CHEMICAL ENGINEERING OF JAPAN 70 巻 ( 10 ) 頁： 575 - 576 2006年10月

Twenty-first annual international pittsburgh coal conference

Suzuki T., Naruse I.

Fuel 85 巻 ( 2 ) 2006年1月

P227 電気加熱式ドロップチューブ反応炉による木質バイオマスの基礎ガス化特性

榛葉貴紀, 成瀬一郎

バイオマス科学会議発表論文集 1 巻 ( 0 ) 頁： 110 - 111 2006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

Gasification and pyrolysis characteristics of woody biomass were studied, using an electrically heated drop tube furnace, at 1173K and in CO_2 and N_2 atmospheres, respectively. Hinoki sawdust was selected as one of samples of woody biomass. Under this experimental condition, the gasification conversion and cold gas efficiency attained about 18% and 39%, respectively. The main components of the gaseous species were CO, H_2 and CH_4. The concentrations of those gaseous species in gasification were higher than that in pyrolysis. The main composition of the residue for gasification was fixed carbon. These results suggested that volatile matter in the biomass is easily gasified. The fixed carbon in the biomass was hard to be gasified.

DOI： 10.20550/jiebiomassronbun.1.0_110

CiNii Research

脱硫プロセスにおける石灰石焼成のアルカリ金属化合物の効果 : 分子動力学シミュレーション

村上高広, 栗田典之, 成瀬一郎

Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) 114 巻 ( 1332 ) 頁： 676 - 680 2006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：公益社団法人日本セラミックス協会

In this study, the change in the desulfurization characteristics of limestone induced by adding some alkali metal compounds and chlorides to limestone was investigated by thermobalance experiments. In addition, molecular dynamics (MD) simulations were performed to elucidate the effect of alkali-metal chloride additions on the CaO calcination for the desulfurization process. The experimental results obtained show that the addition of NaCl into the limestone is the most effective in improving the desulfurization efficiency. The X-ray diffraction analyses of the calcined seashell, limestone and NaCl-doped limestone found that the calcined seashell, as well as the calcined NaCl-doped limestone, have a similar structure as the CaO crystal. These two materials also show a high desulfurization efficiency. The MD simulations show that NaCl doping into the CaO contributes to the crystallization of CaO, while KCl and LiCl dopings have a small contribution. Therefore, the NaCl doping has a predominant effect on the CaO crystallization leading to a high desulfurization efficiency.

DOI： 10.2109/jcersj.114.676

Scopus

CiNii Research

P223 低品位炭とバイオマスの混焼場におけるNOおよびN_2O挙動

ガニアスリ, 成瀬一郎

バイオマス科学会議発表論文集 1 巻 ( 0 ) 頁： 102 - 103 2006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 considering effective utilization of low-grade coals with high fixed carbon content, it is necessary to enhance ignition and burnout characteristics by means of adding the supplemental fuels. Co-combustion technologies for low-grade coals with biomass are generally recognized as one of the candidate technologies to enhance these characteristics. Although the biomass addition will affect NO_x emission, the precise NO and N_2O behaviors during co-combustion have not always been elucidated yet. Therefore, this report studies fundamental NO and N_2O formation/decomposition behaviors and their mechanisms experimentally and theoretically. In the simulation, the homogeneous and heterogeneous reaction schemes are considered to elucidate the NO and N_2O formation/decomposition mechanisms precisely. As a result, concentrations of NO and N_2O during co-combustion become almost similar to those during coal combustion, even if the input fuel nitrogen in co-combustion is half of that in coal combustion. The NO and N_2O formation/decomposition mechanisms relate to the heterogeneous reaction scheme. The main elemental reaction is the reaction of NO with char-C to produce CN, which reacts with OH to form NCO. Consequently, the simulation results agree well with the experimental results obtained.

DOI： 10.20550/jiebiomassronbun.1.0_102

CiNii Research

模擬廃油燃焼場における微粒子の生成特性

金岡俊樹, 村松健志, 成瀬一郎

廃棄物学会研究発表会講演論文集 17 巻 ( 0 ) 頁： 241 - 241 2006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：一般社団法人廃棄物資源循環学会

本研究では、廃油燃焼場における微粒子の生成特性を基礎的観点から明確にするために、２流体噴霧ノズルバーナを有するドロップチューブ燃焼炉を用いて、軽油ベースの模擬廃油燃料の燃焼実験を行った。ここでは、燃料中の残留炭素分ならびに芳香族炭化水素の種類と含有量に注目し、ベース燃料に残留炭素を多く含むC重油および各種芳香族炭化水素を添加した燃料を燃焼させ、燃焼排ガス中に存在する微粒子の粒径分布や濃度の比較を行った。主な結果として、空気比0.8の軽油燃焼場における微粒子は、粒径0.08_から_0.24mmに単一ピークを有するタール状のすす前駆体であり、排ガス中に約0.15g/m3の濃度で存在する。燃料中の残留炭素および芳香族炭化水素は、すす前駆体の濃度ならびに0.08_から_0.24mmのサブミクロン粒子の生成に影響を及ぼす。すす前駆体中におけるPAH濃度は、３_から_４環の化合物濃度が高い。

DOI： 10.14912/jswmepac.17.0.241.0

CiNii Research

固体燃焼プロセスにおける微量金属を含む微粒子の生成機構解明とその制御

成瀬一郎

日本燃焼学会誌 48 巻 ( 144 ) 頁： 174 - 179 2006年

Screening of sorbents and capture of lead and cadmium compounds during sewage sludge combustion

Yao H., Mkilaha I., Naruse I.

Fuel 83 巻 ( 7-8 ) 頁： 1001 - 1007 2004年5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：Fuel

Current understanding has shown that aluminosilicate- and calcium-based sorbents could be applied to control trace metals emission from combustion and incineration processes. However, the use of industrial commercial sorbents is not always appropriate. The present study dwells on the use of natural and waste materials as sorbents to capture lead and cadmium compounds during combustion. The main task is to optimize the use of those materials by screening them, using a thermobalance. Then, the determined optimum sorbent was tested on an electrically heated drop tube furnace, burning sewage sludge at temperatures ranging from 1073 to 1223 K. The results showed that some of aluminosilicate-based sorbent were more effective than calcium-based sorbents. Kaolin was found to be a relatively effective sorbent for Pb and Cd capturing. The results further showed that the capture ability depended on chemical compositions and specific surface area of the sorbents. Presence of HCl caused a little decrease in the capture ability, using aluminosilicate-based sorbents, while significant effect on the capture processes was noted when calcium-based sorbents were used. Furthermore, when kaolin was added into the sewage sludge, kaolin was an appropriate sorbent to control lead and cadmium emissions. Temperature increase enhances the capture ability under our experimental conditions. Kaolin addition played a role for low leachability of the trace metals. © 2003 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.fuel.2003.10.022

Scopus

燃焼プロセスにおける微量金属成分の生成挙動解明とその制御に関する研究(進歩賞(学術部門),平成15年度日本エネルギー学会)

成瀬一郎

日本エネルギー学会誌 83 巻 ( 4 ) 頁： 3 2004年4月

製鋼用電炉における熱源・炭素源としての廃プラスチックスの適応

亀嶋保, 堀田雅也, 成瀬一郎, 大森浩志

材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting 17 巻 ( 1 ) 頁： 94 2004年3月

Methodology to construct material circulatory network in a local community

Naruse, I; Hotta, M; Goto, T; Funatsu, K

SUSTAINABLE DEVELOPMENT OF ENERGY, WATER AND ENVIRONMENT SYSTEMS 頁： 29 - 36 2004年

地域における物質循環型社会ネットワーク

成瀬一郎

化学工学 67 巻 ( 5 ) 頁： 267 - 268 2003年5月

Sorbent control of trace metals in sewage sludge combustion and incineration

Naruse I., Yao H., Mkilaha I.

Journal De Physique. IV : JP 107 巻 ( II ) 頁： 917 - 920 2003年5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：Journal De Physique. IV : JP

Coal and wastes combustion have become an important issue not only in terms of energy generation but also environmental conservation. The need for alternative fuels and wastes management has made the two energy sources of importance. However, the utilization of the two is faced with problems of impurity trace metals in the fuel. These metals usually speciate during combustion or incineration leading to generation of fumes and subsequently particles. This paper reports on the study aimed at understanding the speciation of trace metals and their emission from combustion systems as particulates. Experiments carried out using a down-flow furnace and theoretical study carried out using lead, chromium and cadmium as basic metals had shown that their speciation and subsequent emission is controlled by both chemical composition and physical properties of the fuel. The physical and chemical and physical properties of the fuel and their respective compounds and the operating conditions of the incineration and combustion system control the enrichment of the particles with trace metals.

DOI： 10.1051/jp4:20030448

Scopus

Optimization and utilization of sorbents to control trace metal emissions in combustion processes

Yao, H; Naruse, I

COAL COMBUSTION FACING THE 21ST CENTURY 頁： 427 - 431 2003年

Trace-metal speciation during sludge combustion and incineration

Mkilaha I., Yao H., Naruse I.

Combustion Science and Technology 174 巻 ( 11-12 ) 頁： 325 - 344 2002年11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：Combustion Science and Technology

Municipal waste combustion has been opted as a method for reducing the size of the volume, and consequently, for reducing the necessary requirement of areas for direct disposal. However, the emission of the conventional gaseous pollutants are not the only problem; traces of metal fumes emanate from the metallic compounds that are in the wastes. Efforts to control these metal fumes have not been so successful because of the complicated mechanisms of the metallic compounds during combustion. Failure of the conventional systems to trap the trace elements is due to their appearance with the submicron particles from the combustion and incineration systems. In this work, a thermomechanical equilibrium approach is employed to study the combustion and gasification behavior of trace metals with a case of lead, cadmium, and chromium during the incineration of sewage sludge. In this work, sulfur and chlorine have been found to play a key role in the speciation of the trace metals. However, these elements are only active when oxygen is present. A test on alkali metals mixed with trace metals showed that at low concentrations of S and Cl, the alkali metals react first with these elements before other metals. Chlorine assists in retaining most of the trace metals in the vapor phase while sulfur keeps them in the condensed form. The presence of iron, as is the case with most sorbents, hinders the reaction of Cl with the metals, thus suppressing the formation of volatile compounds.

DOI： 10.1080/713712965

Scopus

Thermodynamic analysis of the role of chlorine and sulfur environments during combustion and incineration processes

MKILAHA Iddi S. N., YAO Hong, NARUSE Ichiro

Journal of material cycles and waste management 4 巻 ( 2 ) 頁： 143 - 149 2002年10月

　前のページ - 次のページ　

<成瀬 一郎>

論文 - 成瀬 一郎

<成瀬　一郎>

論文 - 成瀬　一郎