Faculty Profiles - NARUSE Ichiro

Papers - NARUSE Ichiro

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Development of thermal spraying wire for adhesion control of ashes (report 1)

ITO TADASHI, SAITO TEIICHIRO, NAGANUMA HIROSI, IKEDA NOBUYA, NARUSE ICHIRO, IGARASHI YOSHIAKI

Preprints of the National Meeting of JWS Vol. 2008f ( 0 ) page： 311 - 311 2008

大気環境

成瀬一郎

化学工学 = CHEMICAL ENGINEERING OF JAPAN Vol. 71 ( 10 ) page： 702 - 703 2007.10

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 Vol. 46 ( 11 ) page： 3566 - 3573 2007.4

Language：English Publishing type：Research paper (scientific journal) Publisher：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 Fundamental biomass gasification tests by packed-bed gasifier

TORIGOE Takashi, NARUSE Ichiro

Proceedings of the Conference on Biomass Science Vol. 2 ( 0 ) page： 88 - 89 2007

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Institute of Energy

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 Fundamental characteristics of CO_2 and H_2O gasification for woody biomass in electrically heated drop tube furnace

Shinba Takanori, Naruse Ichiro

Proceedings of the Conference on Biomass Science Vol. 2 ( 0 ) page： 36 - 37 2007

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Institute of Energy

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

Emission Behaviors and Control of Trace Elements during Combustion Processes

NARUSE Ichiro

Journal of the Society of Inorganic Materials, Japan Vol. 14 ( 328 ) page： 177 - 183 2007

Atmospheric Environment

Vol. 70 ( 10 ) page： 575 - 576 2006.10

Twenty-first annual international pittsburgh coal conference

Suzuki T., Naruse I.

Fuel Vol. 85 ( 2 ) 2006.1

P227 Gasification characteristics of woody biomass by electrically heated drop tube furnace

Shinba Takanori, Naruse Ichiro

Proceedings of the Conference on Biomass Science Vol. 1 ( 0 ) page： 110 - 111 2006

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Institute of Energy

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

Effect of Alkali Metal Compounds on Limestone Calcination in Desulfurization Process: Molecular Dynamics Simulations

MURAKAMI Takahiro, KURITA Noriyuki, NARUSE Ichiro

Journal of the Ceramic Society of Japan Vol. 114 ( 1332 ) page： 676 - 680 2006

Language：English Publishing type：Research paper (scientific journal) Publisher：The Ceramic Society of Japan

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.<br>

DOI： 10.2109/jcersj.114.676

Scopus

CiNii Research

P223 NO and N_2O behaviors during co-combustion of low-grade coal with biomass

Gani Asri, Naruse Ichiro

Proceedings of the Conference on Biomass Science Vol. 1 ( 0 ) page： 102 - 103 2006

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Institute of Energy

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

Formation Mechanisms and Control of Particulate Matter with Trace Metal Compounds in Solid-fuel Combustion Processes

NARUSE Ichiro

Journal of the Combustion Society of Japan Vol. 48 ( 144 ) page： 174 - 179 2006

Caracteristic of Particulate Matter Formation during Combustion of Simulated Waste Oil

kanaoka toshiki, muramatsu kenshi, naruse ichiro

Proceedings of the Annual Conference of The Japan Society of Waste Management Experts Vol. 17 ( 0 ) page： 241 - 241 2006

Language：English Publishing type：Research paper (scientific journal) Publisher：Japan Society of Material Cycles and Waste Management

This paper studies the fundamental formation characteristics of fine particulates during the wasted oil combustion. The combustion experiments are conducted, using a drop tube furnace with a spray burner of two-phase flow type. The particulate matter in the exhausted gas is collected and classified by a Low Pressure Impactor (LPI) isokinetically. This study focuses on effect of content of residual carbon and Polycyclic Aromatic Hydrocarbons (PAH) in a fuel on the PM formation. The light oil with C-type heavy oil or several types of aromatic hydrocarbons are tested as the simulated waste oils. As a result, particle size distribution of the particulates during light oil combustion at stoichiometric air ratio of 0.8 becomes single-mode with the size between 0.08 and 0.24 mm. The PM collected looks like a tar as precursor of soot particles. The residual carbon and aromatic hydrocarbons in a fuel affect concentration of precursor of soot particles and formation of submicron particles with size between 0.08 and 0.24 mm. Additionally, 3 to 4 rings PAHs are concentrated in the precursor of soot particles.

DOI： 10.14912/jswmepac.17.0.241.0

CiNii Research

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

Yao H., Mkilaha I., Naruse I.

Fuel Vol. 83 ( 7-8 ) page： 1001 - 1007 2004.5

Language：English Publishing type：Research paper (scientific journal) Publisher：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 Vol. 83 ( 4 ) page： 3 2004.4

Application of Wasted Plastics to Thermal and Carbon Sources in Electric Furnaces for Steel Making

KAMESHIMA Tamotsu

Vol. 17 ( 1 ) page： 94 2004.3

Material Circulatory Network in Local Society

NARUSE Ichiro

Vol. 67 ( 5 ) page： 267 - 268 2003.5

Sorbent control of trace metals in sewage sludge combustion and incineration

Naruse I., Yao H., Mkilaha I.

Journal De Physique. IV : JP Vol. 107 ( II ) page： 917 - 920 2003.5

Language：English Publishing type：Research paper (scientific journal) Publisher：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

Trace-metal speciation during sludge combustion and incineration

Mkilaha I., Yao H., Naruse I.

Combustion Science and Technology Vol. 174 ( 11-12 ) page： 325 - 344 2002.11

Language：English Publishing type：Research paper (scientific journal) Publisher：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

Vol. 4 ( 2 ) page： 143 - 149 2002.10

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