Faculty Profiles - NARUSE Ichiro

Papers - NARUSE Ichiro

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Effects of coal types on ash fragmentation and coalescence behaviors in pulverized coal combustion

Yoshiie Ryo, Tsuzuki Takuro, Ueki Yasuaki, Nunome Yoko, Naruse Ichiro, Sato Naoki, Ito Takamasa, Matsuzawa Yoshiaki, Suda Toshiyuki

PROCEEDINGS OF THE COMBUSTION INSTITUTE Vol. 34 ( 2 ) page： 2895 - 2902 2013

No.26 Ash Deposition Behavior during Co-combustion in Pulverized Coal Combustion Boiler.

Azuma Yuichi, NUNOME Yoko, UEKI Yasuaki, YOSHIIE Ryo, NARUSE Ichiro, NARUKAWA Kimihito, INAGAKI Hironobu

Proceedings of Conference on Coal Science Vol. 50 ( 0 ) page： 52 - 53 2013

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

In pulverized coal combustion boiler, ash deposits such as slagging and fouling prevent heat transfer. On the other hand, a reserve of high lank coal is limited. So co-combustion of low lank coal, that is inexpensive, and high lank coal has been carried out in pulverized coal combustion boiler. Generally, low lank coal includes ash of low melting point. However, in this situation, ash deposition behavior has not been clarified. The purpose of this work is elucidation of ash deposition behavior during co-combustion in pulverized coal combustion boiler. Ash deposits were collected on a heat transfer tube with an ash deposit experiment at some blend condition. Ash particles near the adhesion interface were analyzed about element distribution by a Scanning Electron Microscope and an Energy Dispersive X-ray (SEM/EDX). And ash particles are also analyzed about composition and particle size distribution by a Computer Control Scanning Electron Microscope (CCSEM). We calculated the molten fraction of each mix condition ash by chemical equilibrium theory, using FactSage Ver.6.3.1 software.

DOI： 10.20550/jiesekitanronbun.50.0_52

Reduction mechanisms of ash deposition in coal and/or biomass combustion boilers Reviewed

Hiroshi Naganuma, Nobuya Ikeda, Tadashi Ito, Mikio Matsuura, Yoko Nunome, Yasuaki Ueki, Ryo Yoshiie, Ichiro Naruse

Fuel Vol. 106 page： 303-309 2013

Reduction mechanisms of ash deposition in coal and/or biomass combustion boilers Reviewed

Hiroshi Naganuma, Nobuya Ikeda, Tadashi Ito, Mikio Matsuura, Yoko Nunome, Yasuaki Ueki, Ryo Yoshiie, Ichiro Naruse

Fuel Vol. 106 page： 303–309 2013

Reaction behavior during heating biomass materials and iron oxide composites Reviewed

Y.Ueki, R.yoshiie, I.Naruse, K.-i.Ohno, T.Maeda, K.Nishioka, M.Shimizu

FUEL Vol. 104 page： 58-61 2013

No.28 Oxy-Fuel combustion property of coal using fluidized bed

SUGIURA Kouki, NUNOME Yoko, UEKI Yasuaki, YOSHIIE Ryo, NARUSE Ichiro

Proceedings of Conference on Coal Science Vol. 50 ( 0 ) page： 56 - 57 2013

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

Recently, oxy-fuel coal combustion has drawn attention as useful technique to achieve carbon dioxide capture and storage (CCS). This is the technique that enriches CO_2 in exhaust gas by the flue gas recirculation with additional pure O_2 to combustion atmosphere, which makes easy to capture CO_2. 0n the other hand, bubbling fluidized bed coal combustion has advantages of direct sulfur capturing in furnace by adding desulfurizing agents to bed material and decreasing of thermal NO_x as a result of low combustion temperature. However, oxy-fuel combustion behavior of coal in a bubbling fluidized bed is still unclear. In this study, we conducted the coal burning experiment under CO_2/O_2 using bubbling fluidized bed and compared oxy-fuel combustion behavior with air combustion behavior of coal. In addition, three coal samples having different nitrogen contents were tested to estimate the effect of raw coal properties on oxy-fuel combustion behaviors.

DOI： 10.20550/jiesekitanronbun.50.0_56

No.27 Artificial coal of mineral particle behaviors in coal combustion process

NISHIMURA Hitoshi, NUNOME Yoko, UEKI Yasuaki, YOSHIIE Ryo, NARUSE Ichiro

Proceedings of Conference on Coal Science Vol. 50 ( 0 ) page： 54 - 55 2013

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

In general, the use of coal having different physical properties from those of design coal in a pulverized coal combustion plant causes ash deposit troubles, such as fouling and slagging. However, from the viewpoint of utilization of low rank coals, flexibilities for various coal types as fuel are going to be required in pulverized coal fired boilers before long. Then, it is important to preliminarily predict mineral particle behaviors in coal combustion process. In this study, their behaviors are studied by use of artificial coal samples which contains included minerals and excluded minerals. Coal samples are burned in a drop tube furnace to sample particles in different conversion ratio and residence time. Then included and excluded minerals are analyzed and classified in particles by CCSEM

DOI： 10.20550/jiesekitanronbun.50.0_54

Development of a Method for Measuring Gaseous Boron in Coal Combustion Flue Gas

NODA Naoki, ITO Shigeo, UEKI Yasuaki, YOSHIIE Ryo, NARUSE Ichiro

KAGAKU KOGAKU RONBUNSHU Vol. 38 ( 3 ) page： 183 - 188 2012.7

Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan

Boron compounds are generally highly volatile, and some of them vaporize in coal combustion and are contained in the flue gas. The partitioning behavior of boron from coal to the flue gas depends on the coal type, and the partitioning mechanisms are complex. In order to elucidate these mechanisms, it is necessary to develop a method to measure gaseous boron in coal combustion flue gas. In this study, we examined the absorption solution and sampling system material for gaseous boron compounds, using a model system of gaseous boron compounds and flue gas from a practical coal combustion facility. As a result, nitric acid with hydrogen peroxide was found to be the optimum solution for absorption. Silica glass or ethylene tetrafluoride resin were suitable materials for the sampling probe and line and the absorption impinger. Additionally, the sampling line must be kept at more than 130°C in order to analyze the gaseous boron concentration accurately.

DOI： 10.1252/kakoronbunshu.38.183

Scopus

Volatilization characteristics of boron compounds during coal combustion Reviewed

Naoki Noda, Shigeo Ito, Yoko Nunome, Yasuaki Ueki, Ryo Yoshiie, Ichiro Naruse

Proceedings of Combustion Institute Vol. 34 page： 2831-2838 2012

Conversion synergies during steam co-gasification of lingno-cellulosic simulated biomass with coal Reviewed

Kihedu J.H, Yoshiie R, Nunome Y, Ueki Y, Naruse I

Jornal of Sustainable Bioenergy Systems Vol. 2 ( 4 ) page： 97-103 2012

Effects of coal types on ash fragmentation and coalescence behaviors in pulverized coal combustion Reviewed

Ryo Yoshiie, Takuro Tsuzuki, Yasuaki Ueki, Yoko Nunome, Ichiro Naruse, Naoki Sato, Takamasa Ito, Yoshiaki Matsuzawa, Toshiyuki Suda

Proceedings of Combustion Institute Vol. 34 page： 2895-2902 2012

石炭燃焼排ガス中ガス状ホウ素の測定法開発 Reviewed

野田直希，伊藤茂男，植木保昭，義家亮，成瀬一郎

化学工学論文集 Vol. 38 ( 3 ) page： 183-188 2012

膜分離を伴う溶媒抽出による廃潤滑油の再生処理 Reviewed

義家亮，植木保昭，三輪高裕，成瀬一郎

日本機械学会論文集B編 Vol. 78 ( 789 ) page： 1048-1052 2012

203 Adsorption characteristics of gaseous mercury by carbonized waste

UEKI Yasuaki, SAWA Hiroaki, YOSHIIE Ryo, NARUSE Ichiro

The Proceedings of the Symposium on Environmental Engineering Vol. 2012 ( 0 ) page： 131 - 132 2012

Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers

Coal and solid fuels derived from industrial wastes sometimes contain a small amount of mercury compounds. In conmbustion processes, gaseous elemental mercury passes through the stack and releases into the atmosphere. Mercury emissions in the combustion processes have been focused as one of upcoming air pollutants. In this work, it is the purpose to use wastes (sewage sludge, woody biomass and municipal waste) as an adsorbent of elemental mercury. We conducted mercury adsorption experiment used carbonized sewage sludge, carbonized biomass and carbonized municipal waste as adsorbents. As a result, the mercury adsorption ratio of carbonized municipal waste was the largest.

DOI： 10.1299/jsmeenv.2012.22.131

403 Effects of coal types on ash behaviors in pulverized coal combustion

YOSHIIE Ryo, TSUZUKI Takuro, UEKI Yasuaki, NARUSE Ichiro, SATO Naoki, MATSUZAWA Yoshiaki, ITO Takamasa, SUDA Toshiyuki

The Proceedings of Conference of Tokai Branch Vol. 2012 ( 0 ) page： _403 - 1_-_403-2_ 2012

Development of a Method for Measuring Gaseous Boron in Coal Combustion Flue Gas

Noda Naoki, Ito Shigeo, Ueki Yasuaki, Yoshiie Ryo, Naruse Ichiro

KAGAKU KOGAKU RONBUNSHU Vol. 38 ( 3 ) page： 183 - 188 2012

Conversion synergies during steam co-gasification of lingno-cellulosic simulated biomass with coal Reviewed

Kihedu J.H, Yoshiie R, Nunome Y, Ueki Y, Naruse I

Jornal of Sustainable Bioenergy Systems Vol. 2 ( 4 ) page： 97-103 2012

Effects of coal types on ash fragmentation and coalescence behaviors in pulverized coal combustion Reviewed

Ryo Yoshiie, Takuro Tsuzuki, Yasuaki Ueki, Yoko Nunome, Ichiro Naruse, Naoki Sato, Takamasa Ito, Yoshiaki Matsuzawa, Toshiyuki Suda

Proceedings of Combustion Institute Vol. 34 page： 2895-2902 2012

No.21 Effects of Exhaust Gas Recirculation on Emissions of Nitrogen Oxide from Coal Combustion

HIKOSAKA Naoki, NUNOME Yoko, UEKI Yasuaki, YOSHIIE Ryo, NARUSE Ichiro

Proceedings of Conference on Coal Science Vol. 49 ( 0 ) page： 42 - 43 2012

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

Currently, it becomes increasingly necessary to decrease CO_2 emissions from fossil fuel combustion processes, because they are major contributors to the global warming. Oxy-fuel coal combustion has drawn attention as useful technique to achieve carbon dioxide capture and storage (CCS). This is the technique that enriches CO_2 in exhaust gas by the flue gas recirculation with additional pure O_2 to combustion atmosphere, which makes easy to capture and liquidize CO_2 downstream. However, there have been few reports about behaviors of various environmental pollutants in oxy-fuel coal combustion with the flue gas recirculation. In this study, we experimentally estimated effects of NO and N_2O recirculation with CO_2 by a drop tube furnace equipment. In addition, we simulated NO and N_2O formations under oxy-fuel coal combustion condition by elementary reaction analysis, and then we discussed mechanism for the formation of NOX.

DOI： 10.20550/jiesekitanronbun.49.0_42

Slagging Behavior of Upgraded Brown Coal and Bituminous coal in 145MW Practical Coal Combustion Boiler

Akiyama Katsuya, Pak Haeyang, Takubo Yoji, Tada Toshiya, Ueki Yasuaki, Yoshiie Ryo, Naruse Ichiro

CLEANER COMBUSTION AND SUSTAINABLE WORLD page： 77 - 82 2012

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