研究者詳細 - 成瀬　一郎

論文 - 成瀬　一郎

分割表示 526 件中 181 - 200 件目／全件表示 >>

Ash deposition mechanisms in Waste-to-Energy plants, 査読有り

Hiroshi NAGANUMA, Takehito MORI, Sho WATANABE, Akihiro SAWADA, Taeko GOTO, Yasuaki UEKI, Ryo YOSHIIE, Ichiro NARUSE

J-STAGE Mechanical Engineering Journal, Article ID: 21-00435 2022年5月

Ash Particle Behaviors during Combustion and Gasification of Coke 査読有り

Ueki Yasuaki, Teshima Koki, Yoshiie Ryo, Naruse Ichiro

ISIJ INTERNATIONAL 60 巻 ( 7 ) 頁： 1427 - 1433 2021年

1-01　微粉炭のガス化挙動に及ぼすチャー構造の影響

根岸孝征, 植木保昭, 義家亮, 成瀬一郎, 中野薫

石炭科学会議発表論文集 57 巻 ( 0 ) 頁： 2 - 3 2020年

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

Currently, pulverized coal is blown into blast furnaces to reduce the amount of coke used in the steelmaking process. On the other hand, in recent years, the grade of coal has been declining due to the increase in the use of coal, and the company has been forced to respond to the diversification of coal types. Therefore, in this study, we used a batch furnace to prepare three types of coal char, and then the cross-sectional observation of the char by SEM and specific surface area analysis by BET method using N2 were carried out. Coal with porous particles and high specific surface area values was found to have very high gasification reactivity for both CO2 and H2, while coal with balloon-type particles with large cavities inside the particles and low specific surface area values was found to have lower gasification reactivity.

DOI： 10.20550/jiesekitanronbun.57.0_2

4-11　微量炭化水素による固体酸化物燃料電池の劣化挙動

張慧, 義家亮, 成瀬一郎, 植木保昭

日本エネルギー学会大会講演要旨集 29 巻 ( 0 ) 頁： 130 - 131 2020年

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 this study, effects of tar-containing fuel gas on the SOFC with Ni-YSZ as anode electrode are evaluated. The simulated gas was hydrogen contaminated with toluene as model substance of tar. Electrochemical behaviors were investigated under several toluene concentrations in wet (2.3vol% H2O) H2 at 850°C during 30h using constant current measurement and impedance analysis in order to assess the SOFC's stability. Constant current measurements were conducted under 200mA/cm2 mainly and impedance analysis was conducted under OCV conditions. Experimental results show that the presence of tar dramatically reduces the electrochemical performance of SOFC even under a low concentration of 100ppm. It was also indicated this reduction tend to be serious when concentration of toluene increase.

DOI： 10.20550/jietaikaiyoushi.29.0_130

1-02　流動層におけるOxy石炭燃焼挙動の解明

山中建人, 義家亮, 植木保昭, 成瀬一郎

石炭科学会議発表論文集 57 巻 ( 0 ) 頁： 4 - 5 2020年

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

Oxy-Fuel combustion is one of the techniques to achieve carbon dioxide capture and storage (CCS). Meanwhile, fluidized bed combustion has the advantage of increasing combustion efficiency due to particle flow. Oxy-fuel coal combustion in a fluidized bed is a relatively new study, so the combustion behavior remains unclear. In this study, we investigated Oxy-fuel coal combustion behavior by comparing three combustion atmospheres, air, CO2-O2 and Oxy-Fuel using bubbling fluidized bed reactor. Especially in this research, we focused on the production of SOx, and in Oxy-fuel combustion, the concentration of SO2 increased due to the effect of recirculation. Regarding SO3 generation in Oxy-fuel combustion, the concentration became high due to the influence of SO2 circulation and H2O circulation.

DOI： 10.20550/jiesekitanronbun.57.0_4

Direct analysis of saturated hydrocarbons using glow discharge plasma ionization source for mass spectrometry 査読有り

Nunome Yoko, Kodama Kenji, Ueki Yasuaki, Yoshiie Ryo, Naruse Ichiro, Wagatsuma Kazuaki

TALANTA 204 巻頁： 310 - 319 2019年11月

Generation behavior of tar from ABS, PC, and PE during pyrolysis and steam gasification by mass spectrometry 査読有り

Nunome Yoko, Suzuki Toshiya, Nedjalkov Ivan, Ueki Yasuaki, Yoshiie Ryo, Naruse Ichiro

JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT 21 巻 ( 6 ) 頁： 1300 - 1310 2019年11月

Characteristics of Biomass Devolatilization and in Situ Char Gasification Tested by the Non-Isothermal Method 査読有り

Zeng Xi, Kahara Kaito, Ueki Yasuaki, Yoshiie Ryo, Xu Guangwen, Naruse Ichiro

ENERGY & FUELS 33 巻 ( 10 ) 頁： 9805 - 9817 2019年10月

Removal of gaseous elemental mercury by hydrogen chloride non-thermal plasma modified biochar

Luo Jinjing, Jin Mingchang, Ye Lurong, Cao Yinan, Yan Yonggui, Du Rupeng, Yoshiie Ryo, Ueki Yasuaki, Naruse Ichiro, Lin ChinJung, Lee YiYuan

JOURNAL OF HAZARDOUS MATERIALS 377 巻頁： 132 - 141 2019年9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 of Hazardous Materials

Hydrogen chloride (HCl)non-thermal plasma was applied to introduce Cl active sites on biochar prepared from sorghum straw in this study. Surface modified biochar was then placed in flue gas with typical components to investigate its elemental mercury (Hg0)capture ability. To elucidate the adsorption mechanism & binding properties, samples were characterized by N2 adsorption, scanning electron microscopy with energy dispersive spectrometer (SEM-EDS)and X-ray absorption near edge structure (XANES)analysis of Hg LIII-edge, Cl K-edge and S K-edge. Experimental results showed that HCl plasma modification successfully increased Cl active sites on biochar and greatly increased its mercury removal efficiency. Both HCl treatments (w/without plasma involvement)altered biochar's surface structure and layered structure generated. XANES spectra revealed that adsorbed-Hg on HCl-treated biochars mainly in the form of Hg+. Gaseous Hg0 was believed to heterogeneously react with chlorinated sites through electron-transfer and formed Hg2Cl2 compounds. With the presence of NO or SO2 in the system, adsorbed mercury existed on biochar mainly as Hg+. SO2 competed and inhibited the adsorption of Hg0; while NO promoted Hg0 removal capacity by increasing the active sites and enhancing the adsorption kinetics of adjacent Cl-containing sites.

DOI： 10.1016/j.jhazmat.2019.05.045

Web of Science

Scopus

PubMed

Development of a Heating Process of a Slag-Tapping Hole by Syngas Burning in a 150 t/d Entrained-Bed Coal Gasifier 査読有り

Ishiga Takuya, Kumagai Takeshi, Utano Masakazu, Yamashita Hiroshi, Ueki Yasuaki, Yoshiie Ryo, Naruse Ichiro

ENERGY & FUELS 33 巻 ( 4 ) 頁： 3557 - 3564 2019年4月

A novel CO2-water leaching method for AAEM removal from Zhundong coal 査読有り

Ding Lizhi, Gao Yaxin, Li Xian, Wang Wenhui, Xue Yi, Zhu Xianqing, Xu Kai, Hu Hongyun, Luo Guangqian, Naruse Ichiro, Yao Hong

FUEL 237 巻頁： 786 - 792 2019年2月

Effects of mechanical stresses around single tube on ash shedding in pulverized coal combustor 査読有り

Sato Naoki, Ueno Shun-ichiro, Ohno Emi, Tamura Masato, Ueki Yasuaki, Yoshiie Ryo, Naruse Ichiro

PROCEEDINGS OF THE COMBUSTION INSTITUTE 37 巻 ( 3 ) 頁： 2875 - 2882 2019年

Oxygen chemisorption and low-temperature oxidation behaviors of sub-bituminous coal

Yoshiie Ryo, Onda Masaomi, Ueki Yasuaki, Naruse Ichiro

JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY 14 巻 ( 1 ) 頁： JTST0005 - JTST0005 2019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：一般社団法人日本機械学会・社団法人日本伝熱学会

The effective utilization of sub-bituminous coals should be extended as an energy source for power generation because of their low cost and long minable years. However, sub-bituminous coal may undergo spontaneous combustion owing to high reactivity with oxygen in low-temperature air compared with bituminous coal. Therefore, the objective of this study is to elucidate the low-temperature oxidation behaviors of sub-bituminous coal. In particular, transition from oxygen chemisorption to low-temperature oxidation of sub-bituminous coal has been experimentally examined in detail. Isothermal gravimetric analyses are conducted for several bituminous and sub-bituminous coal samples at temperatures varying between 356 K and 476 K in oxygen-enriched air. The chemical compositions of emission gas are continuously monitored under low-temperature oxidation conditions. The changes in the chemical structure of the coals are analyzed using Fourier transform infrared (FTIR) spectrometry. The experimental results show that the mass of all tested coals, including those of bituminous and sub-bituminous coals, increases at temperatures below 426 K as a result of oxygen chemisorption. At 476 K, the mass of sub-bituminous coal increases slightly with low H 2 and CO 2 emissions at the beginning and subsequently decreases with high CO and CO 2 emissions. This mass change indicates that the transition from oxygen chemisorption to low-temperature oxidation occurs during this period. In addition, the FTIR spectra of sub-bituminous coals show the existence of carbonyl groups even in raw coal samples. These carbonyl groups are considered to contribute to the formation of CO 2 and H 2 from the beginning of reactions, triggering the transition from oxygen chemisorption to low-temperature oxidation.

DOI： 10.1299/jtst.2019jtst0005

Web of Science

Scopus

CiNii Research

1-14　微粉炭および木質バイオマスの混焼挙動

永田淳, 植木保昭, 義家亮, 成瀬一郎, 成川公史, 森井一彦

石炭科学会議発表論文集 56 巻 ( 0 ) 頁： 28 - 29 2019年

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

Currently, the proportion of fossil fuel in the primary energy supply in Japan is very high. So, the use of renewable energy is collecting a lot of attention as an alternative to fossil fuel. Biomass, a type of renewable energy, has the advantage of carbon neutral. On the other hand, Biomass has the disadvantage of low power generation efficiency when using power generation because of the low energy density. From these backgrounds, biomass co-combustion for coal fired power generation has been focused on. In this study, co-combustion experiments of pulverized coal and biomass samples were carried out, in order to investigate the effect of mixture ratios and types of biomass samples on co-combustion behaviors.

DOI： 10.20550/jiesekitanronbun.56.0_28

1-5　脱硝触媒におけるSi化合物付着特性

中西浩太, 義家亮, 植木保昭, 成瀬一郎, 岡高憲, 吉田拓也, 田中丈晴, 秋山勝哉

石炭科学会議発表論文集 56 巻 ( 0 ) 頁： 10 - 11 2019年

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 coal-fired power generation, De NOx catalysts are known to deteriorate over time, but its mechanism has not been clarified yet. According to the previous research, it has been found that amorphous silica forms a thin layer on the catalyst surface, which composition are much different from those of coal ash. It implies that coal ash itself does not adhere on the surface of the catalyst, but Si compounds in the gas deposits to the catalyst. In order to confirm this consideration, deposition behaviors of vapor Si compounds to the catalyst surface were examined, and its effect on the catalyst performance was investig ated. High volatile siloxane was selected to simulate vapor Si compounds in exhaust gas. Two kinds of experiments are conducted, such as exposure and immersion tests. In the former, test pieces of the catalyst were exposed to siloxane vapor. In the latter, test pieces were immersed in liquid siloxane and calcined afterward. The amount of silica deposition on the surface of the catalyst was analyzed by SEM / EDX. In the catalyst performance evaluation test, dete rioration of the catalyst by silica adhesion wa s confirmed.

DOI： 10.20550/jiesekitanronbun.56.0_10

1-2-1 微粉炭燃焼ボイラ内における灰付着制御

塚原恭平, 義家亮, 植木保昭, 成瀬一郎

日本エネルギー学会大会講演要旨集 28 巻 ( 0 ) 頁： 8 - 9 2019年

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

Coal combustion process discharges a large amount of ash, compared with petroleum and natural gas combustions. Coal ash particles melt and partially volatilizes at high temperature zones, causing many problems. In this study, ash deposition experiment was carried out, using simulated heat transfer tubes made of thermal spraying material. Coal ash was injected into the furnace via high penetrance at a high temperature. The molten slag formation ratio of their chemical composition in a single coal was estimated by the thermodynamic equilibrium calculation and the change of ash deposition characteristics was quantitatively discussed.

DOI： 10.20550/jietaikaiyoushi.28.0_8

Examination of the reduced combustion reaction mechanism for NOx concentration prediction in a waste incinerator

Denda T.

12th Asia-Pacific Conference on Combustion, ASPACC 2019 2019年

Insight of arsenic transformation behavior during high-arsenic coal combustion

Yang Y.

Proceedings of the Combustion Institute 37 巻 ( 4 ) 頁： 4443 - 4450 2019年

A deep insight into carbon conversion during Zhundong coal molten salt gasification

Xu Mian, Hu Hongyun, Yang Yuhan, Huang Yongda, Xie Kang, Liu Huan, Li Xian, Yao Hong, Naruse Ichiro

FUEL 220 巻頁： 890 - 897 2018年5月

Development of soft ionization using direct current pulse glow discharge plasma source in mass spectrometry for volatile organic compounds analysis

Nunome Yoko, Kodama Kenji, Ueki Yasuaki, Yoshiie Ryo, Naruse Ichiro, Wagatsuma Kazuaki

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY 139 巻頁： 44 - 49 2018年1月

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