研究者詳細 - 成瀬　一郎

論文 - 成瀬　一郎

分割表示 541 件中 61 - 80 件目／全件表示 >>

3-1-3　バイオマスチャーのガス化挙動に及ぼす温度およびガス化剤の影響

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 30 巻 ( 0 ) 頁： 38 - 39 2021年7月

5-1-1　流動層を用いたオキシ石炭燃焼における環境汚染物質生成挙動

山中建人, 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 30 巻 ( 0 ) 頁： 122 - 123 2021年7月

O-08　気泡流動層を用いたバイオマス燃焼挙動の解明

加藤紘輝, 義家亮, 植木保昭, 成瀬一郎, 成川公史, 中村英樹

バイオマス科学会議発表論文集 16 巻 ( 0 ) 頁： 19 - 20 2021年1月

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

<p>Woody biomass is attracting attention as an alternative energy to fossil fuels. The use of woody biomass is expected to expand in the future. In order to use biomass efficiently as a fuel, it is necessary to clarify its combustion characteristics. Therefore, in this study, in order to clarify the combustion characteristics of biomass, a biomass combustion experiment was conducted using a bubble fluidized bed. Palm Kernel Shell (PKS) was used as an experimental sample. The effect of temperature on the combustion behaviors of biomass was experimentally considered.</p>

DOI： 10.20550/jiebiomassronbun.16.0_19

O-09　バイオマス燃焼ボイラ内における灰付着挙動

山下達也, 義家亮, 植木保昭, 成瀬一郎, 佐藤直樹

バイオマス科学会議発表論文集 16 巻 ( 0 ) 頁： 21 - 22 2021年1月

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

<p>Operational problems in biomass-fired boilers include ash deposition to heat transfer tubes and corrosion of heat transfer tubes. Therefore, in this study, we focused on potassium compounds in biomass and conducted an ash deposition experiment using an electrically heated drop tube furnace. In the experiment, potassium-containing mineral (K-feldspar) was used as simulated ash. The amount of ash deposition in various atmospheres was measured. The cross section of samples was observed and analyzed by SEM-EDX, and the atmosphere dependence of the ash deposition characteristics was experimentally considered.</p>

DOI： 10.20550/jiebiomassronbun.16.0_21

Tar generation and decomposition in downdraft packed bed reactor for woody biomass gasification Open Access

Yoshiie Ryo, Yamada Atsushi, Nunome Yoko, Ueki Yasuaki, Naruse Ichiro

JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY 16 巻 ( 3 ) 頁： JTST0034 - JTST0034 2021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

When the biomass gasifier is connected with a gas engine system directly, tar should be removed from the syngas to prevent the engine from breaking down. A downdraft packed bed gasifier has the advantage for low tar emission because the syngas passes through the char gasification zone downstream of the reactor, where tar compounds can be trapped and decomposed. Then, objective of this study is to confirm the tar decomposition behaviors inside the downdraft packed bed reactor. Woody biomass gasification experiments were carried out, using an auto-thermal downdraft packed bed gasifier. The reactor’s height and inner diameter were 1000mm and 100mm, respectively. Black pine pallets were continuously fed into the reactor from the top. The gasifying agent was air, which was introduced into the reactor at the air-fuel equivalent ratio of 0.49. The packed bed height was kept to be constant at 600mm. The reactor has eleven thermo-couples and eleven sampling ports at the wall along the flow direction. They were used for measurements of temperature profiles and gas compositions in the reactor. Micro-GC was used for the measurement of N2, O2, CO, CO2 and H2, and FIDGC was used for other hydrocarbons. In some ports among them, tar in syngas was also sampled via dichloromethane scrubbing in ice-bath, and analyzed for molecular weight distributions of tar compounds by TOF-MS. As a result, tar and larger hydrocarbons were confirmed to be generated in the upstream, and then decomposed downstream inside the downdraft reactor.

DOI： 10.1299/jtst.2021jtst0034

脱硝触媒による排ガス中水銀の吸収特性

中山航汰, 義家亮, 成瀬一郎, 植木保昭

廃棄物資源循環学会研究発表会講演集 32 巻 ( 0 ) 頁： 409 2021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

<p>水銀排出量の抑制は現在世界的な問題であり，排出量の低減技術が早急に要求されている．発電施設や廃棄物焼却炉から排出される水銀の大部分は0価の金属水銀であり，これに対し高い捕捉性能を有する捕捉剤の開発は極めて重要である．本研究では，石炭燃焼設備や廃棄物焼却設備に組み込まれている脱硝触媒に対して，充填層型の実験装置を用いて0価水銀の捕捉実験を行い，得られた水銀含有脱硝触媒に対しXPS分析による捕捉水銀の化学種同定を試みた．結果としては，雰囲気中の酸素が脱硝触媒の水銀捕捉性能を向上させること，HClガスの存在下では水銀は主に酸化され放出されることが確認された．インプットする水銀量を大幅に増やした場合，ほとんどの水銀は捕捉されなかったが，酸素が捕捉性能を向上させる傾向は変化しなかった．XPS分析については，試料中の水銀量が微量であったため水銀のスペクトルを検出できず，化学種同定には至らなかった．</p>

DOI： 10.14912/jsmcwm.32.0_409

乾燥下水汚泥の基礎燃焼挙動評価 Open Access

義家亮, 小林知嗣, 植木保昭, 成瀬一郎, 河合卓也, 遠藤正人

環境工学総合シンポジウム講演論文集 2021.31 巻 ( 0 ) 頁： 309 2021年

バイオマス燃料の燃焼挙動の解明と速度論解析

溝口創紀, 植木保昭, 義家亮, 成瀬一郎

廃棄物資源循環学会研究発表会講演集 32 巻 ( 0 ) 頁： 251 2021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

<p>今日，エネルギー需要は日々高まり，この傾向は今後も続くと予想される．しかし，地球上の化石資源は限られており足りないことは明白である．この状況下において，バイオマスを化石資源の代替として利用することが注目を集めている．また，バイオマス資源の中には建築廃材や農業残渣など廃棄物系の有機資源が多く存在し，それらの高効率有効利用が必須である．本研究では実際の燃焼炉の燃焼条件に近い等温条件においてバイオマスの燃焼速度を測定し，反応機構を解明することを目的としている．木質バイオマスである，黒松ペレットを実験試料として等温燃焼実験を行うことにより，温度および酸素濃度依存性を調べた．さらに，速度論解析を行い反応機構についても考察した．バイオマス燃料は，低温から大きな反応速度を持つ物質である揮発分の割合が高いため，昇温過程での燃焼についても考慮することで再現性の高いモデル化が可能であると明らかになった．</p>

DOI： 10.14912/jsmcwm.32.0_251

Recent progress in tar removal by char and the applications: A comprehensive analysis Open Access

Zeng X., Ueki Y., Yoshiie R., Naruse I., Wang F., Han Z., Xu G.

Carbon Resources Conversion 3 巻頁： 1 - 18 2020年1月

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：Carbon Resources Conversion

Tar catalytic removal by char is a promising technology for gasification process because of its porous structure, good catalytic activity, low cost, and easy to treatment after deactivation. To provide comprehensive information on the tar catalytic removal by char, this study focuses on the ongoing efforts and advances from fundamental researches to the industrial applications. The tar removal efficiency by char much depends on reaction conditions and char property, such as char origin, porous structure, the functional group on char surface, carbon structure, and AAEM components. The typical reaction kinetics, reaction mechanism, and the deactivation, will be introduced. Then, for the different gasification processes, the potential or typical applications of tar removal by char are discussed and compared. Finally, a comprehensive analysis and improvement in scaling up, commercializing tar removal technologies and integrating the gasification process, are also evaluated and analyzed in this review.

DOI： 10.1016/j.crcon.2019.12.001

下水汚泥チャーの燃焼挙動に及ぼす温度と酸素分圧の影響

小林知嗣, 植木保昭, 義家亮, 成瀬一郎, 河合卓也

廃棄物資源循環学会研究発表会講演集 31 巻 ( 0 ) 頁： 227 2020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

<p>日本国内では2019年において年間約3.8億トンもの産業廃棄物が排出されており、この中に含まれる可燃性廃棄物をエネルギー資源として有効利用することは、資源節約および環境保護の観点から重要である。本研究は産業廃棄物の中の下水汚泥に着目した。下水汚泥は国内で排出される産業廃棄物の20%を占めるが、バイオガスや汚泥燃料としての利用は17%に留まっていることから改善の余地が大きくある。そこで本研究では、下水汚泥チャーの基礎的な燃焼挙動を把握するために，熱量分析装置を用いて等温燃焼実験を行い，下水汚泥チャーの燃焼挙動に及ぼす燃焼温度および雰囲気ガス中酸素分圧の影響について検討した。実験試料は乾燥消化汚泥チャーおよび混合生汚泥チャー、比較試料としてRDFチャーの３種類を用いた。燃焼実験の結果、反応完結時間はRDFチャー、乾燥消化汚泥チャー、混合生汚泥チャーの順に速くなることを確認することができた。</p>

DOI： 10.14912/jsmcwm.31.0_227

廃棄物チャー燃焼過程の NOx 生成に対するガス組成の影響 Open Access

義家亮, 塚本和峻, 植木保昭, 成瀬一郎, 薄木太一, 傳田知広

環境工学総合シンポジウム講演論文集 2020.30 巻 ( 0 ) 頁： 304 2020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

An incineration process is the most dominant method of the waste disposal in Japan. A stoker furnace incinerator is widely used for the waste incineration. In the stoker furnace incinerator, waste products can be sufficiently stirred and burned completely. Recently, low air ratio and high temperature incineration have been applied to the stoke furnace incinerator to improve efficiencies of power generations. However, they result in the increase in the amount of air pollutant NOx due to their higher flame temperatures. In addition, Exhaust Gas Recirculation (EGR) system, which is also applied into advanced incinerators, makes the NOx formation more complicated. In this research, NOx and other gaseous emissions from RDF char combustion were experimentally analyzed, investigating effects of exhaust gas compositions on NOx formations.

DOI： 10.1299/jsmeenv.2020.30.304

O-17　充填層ガス化炉における酸素富化空気によるバイオマスガス化

小田将矢, 白戸大輔, 義家亮, 成瀬一郎, 植木保昭

バイオマス科学会議発表論文集 15 巻 ( 0 ) 頁： 31 - 32 2019年12月

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

<p>In recent years, biomass gasification processes are attracting attention to produce renewable gaseous fuels. However, it is difficult to use raw biomass because it has low heating values. So, we considered the introduction of oxygen enriched air. By supplying oxygen-enriched air, the heat loss due to water evaporation can be compensated. It is considered that partial combustion of the fuel can be promoted and sufficient heat can be obtained. In the experiments, we used a packed bed gasifier. This gasifier is small in size and suitable for small-scale distributed utilization of biomass. From the experimental results, it was found that even if moisture content of the wet biomass is high, the gasification of the biomass is possible by increasing the oxygen concentration of the gasifying agent. The syngas contained more H<sub>2</sub> and CO compared with normal biomass gasification.</p>

DOI： 10.20550/jiebiomassronbun.15.0_31

P-3-2 各種バイオマスのガス化挙動の解明

白戸大輔, 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： 248 - 249 2019年7月

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

<p>In recent years, due to problems of fossil fuel depletion and global warming, biomass has attracted attention as an alternative energy source. So we focused on biomass gasification. In this study, gasification experiments of three types of biomass are conducted as preliminary experiments of gasification by packed bed gasifier. Assuming that the gas produced when each sample burns completely is assumed as a gasifying agent, the mass loss and gas yield of the sample during gasification were measured.</p>

DOI： 10.20550/jietaikaiyoushi.28.0_248

P-3-9 各種バイオマスの混合による燃焼挙動への影響

加藤紘輝, 植木保昭, 義家亮, 成瀬一郎, 成川公史, 森井一彦

日本エネルギー学会大会講演要旨集 28 巻 ( 0 ) 頁： 262 - 263 2019年7月

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

<p>Biomass is attracting attention as an alternative energy of fossil fuel. It is expected that the use of woody biomass will increase in the future. In order to use biomass efficiently as fuel, it is necessary to clarify its combustion characteristics. So, in this study, in order to clarify the combustion characteristic of biomass, pyrolysis and combustion experiment during the temperature rising process of two kinds of biomass were conducted by using the thermogravimetric analyzer. Two kinds of woody biomass were used as experimental samples. The effects of mixing each biomass on the combustion behavior of woody biomass were discussed.</p>

DOI： 10.20550/jietaikaiyoushi.28.0_262

Oxygen chemisorption of sub-bituminous coal at temperature

Yoshiie R., Ueki Y., Naruse I.

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

The effective utilization of sub-bituminous coals has been 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 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 H2 and CO2 emissions at the beginning and subsequently decreases with high CO and CO2 emissions. This mass change indicates that the transition from oxygen chemisorption to low-temperature oxidation occurs during this period.

バイオマスガス化ガス希釈による火花点火機関の高効率運転 Open Access

千野みつき, 久保直紀, 小林潤, 成瀬一郎

年次大会 2019 巻 ( 0 ) 頁： J07108P 2019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

<p>Low temperature combustion due to dilution of intake air using inert gas is one of the effective methods for heat loss reduction of the engine. However, the combustion velocity almost decreases due to high dilution and that is the reason why a misfire occurs. To prevent the misfire due to reduction of the combustion velocity, application of a biomass gasified gas containing both hydrogen and inert gas to dilution was proposed. Dilution gas in which hydrogen was added to the inert gas was introduced into the engine. And it was suggested that the efficiency be improved.</p>

DOI： 10.1299/jsmemecj.2019.j07108p

廃棄物チャー燃焼過程における NOx 生成挙動評価 Open Access

塚本和峻, 義家亮, 成瀬一郎, 植木保昭, 傳田知広, 薄木太一

環境工学総合シンポジウム講演論文集 2019.29 巻 ( 0 ) 頁： J206 2019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

An incineration process is the most dominant method of the waste disposal in Japan. A stoker furnace is widely used for the waste incineration. Recently, in the stoker furnace, low air ratio and high temperature incineration have been applied increasingly. However, they result in the increase in the amount of air pollutant NOx generated due to flame instability. Especially, it is difficult to control NOx production in char combustion. In this research, in order to evaluate the NOx generation mechanisms in char combustion of waste incineration process, RDF char burning experiments were carried out, investigating the combustion behaviors and exhaust gas compositions. The incineration experiments were conducted at different temperatures and gas conditions such as O<sub>2</sub>, CO<sub>2</sub>, steam, EGR(Exhaust gas recirculation). The char-NOx production behavior showed different behaviors depending on experiment conditions. In particular at the steam gas and EGR conditions, the char-NOx concentration was very high due to the steam gas shift reaction.

DOI： 10.1299/jsmeenv.2019.29.j206

地産地消エネルギー源である廃棄物の燃焼技術

成瀬一郎

日本エネルギー学会機関誌えねるみくす 97 巻 ( 6 ) 頁： 623 - 630 2018年11月

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

<p>地域から発生する廃棄物は，すでに地域資源の一つになっていると考えてよかろう。すなわち，廃棄物燃焼プラントが立地している場所では，近隣への熱供給に留まらず，それなりの効率で発電して，所内利用のみならず売電も行えている。一方，廃棄物燃焼プラントは，定常的に安定処理できることが必須になっており，必然的に年間の定期点検の回数が複数回になったり，プラントの基数も複数基設置することが余儀なくされている。今後，各地域からのごみの総排出量は減少傾向になるであろうものの，発電効率を意味する微分的な効率や年間稼働日数を意味する積分的な効率のさらなる向上とともに，厳格化する環境規制への対応にも万全なプラントにしなければならなくなるであろう。</p>

DOI： 10.20550/jieenermix.97.6_623

Synergistic effect of thermal cracking/partial oxidation/catalytic reforming by char on tar removal in a fluidized bed two-stage gasification process of industrial biomass

Ueki Yasuaki, Zeng Xi, Naruse Ichiro, Yoshiie Ryo, Han Zhennan, Xu Guangwen

廃棄物資源循環学会研究発表会講演集 29 巻 ( 0 ) 頁： 597 2018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

Industrial biomass is the byproduct of light-industry, such as spirit lees, herb residue, bagasse and so on. It is not only a kind of biomass resource, but also a serious environmental pollution source. Gasification is promising and attractive because of cleanness, high efficiency and large treating capacity. However, due to high content of moisture, nitrogen, and organic residue, the existing direct gasification process faces challenges, such as low efficiency, large temperature fluctuation and high tar content in fuel gas. So, innovating gasification process and reactor structure become essential and necessary. In this study, a new fluidized bed two-stage (FBTS) gasification process, mainly consisting of a fluidized bed (FB) pyrolyzer and a transport fluidized bed (TFB) gasifier, has been proposed by the Institute of Process Engineering, Chinese Academy of Sciences. This process decouples direct gasification process into two sub-processes, namely feedstock pyrolysis and char gasification. Depending on thermal cracking, partial oxidation and catalytic reforming by char, the produced tar will be removed to a very low level. To research and develop the FBTS gasification process successfully, the synergistic effect of thermal cracking, partial oxidation and catalytic reforming by char was examined systematically on a laboratory FBTS reaction apparatus.

DOI： 10.14912/jsmcwm.29.0_597

廃棄物焼却炉における NOx 予測に向けた簡略燃焼反応機構の検討 Open Access

傳田知広, 薄木太一, 植木保昭, 義家亮, 成瀬一郎

環境工学総合シンポジウム講演論文集 2018.28 巻 ( 0 ) 頁： 205 2018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

We have developed the technique of numerical simulation which uses the reduced reaction mechanism to predict the combustion behavior in a waste incinerator. In this paper, we newly made the reduced reaction mechanism “N916” (34 species, 76 reactions) for NOx concentration prediction by benchmarking GRI-Mech3.0 (50 species, 326 reactions) which is the typical combustion reaction mechanism. In order to examine the precision of N916, we calculated temperature and NOx concentration distribution in two-dimensional diffusion flame by using N916 and GRI-Mech3.0. The results showed that temperature and NOx concentration distributions were similar and the rate of divergence of NOx concentration value on center axis in the flame was almost 10%. There is a possibility that N916 is able to be used as the substitution for GRI-Mech3.0 in numerical simulation.

DOI： 10.1299/jsmeenv.2018.28.205

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