著者

重松 亮太朗 才野 栞 谷 春樹 平澤 政廣 寺門 修

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第26回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.330-331, 2017-07-25 (Released:2017-07-25)

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It is widely known that PTFE(polytetrafluoroethylene) produces harmful gases, for example, C3F6, C2F4, and HF by pyrolysis. In this study, CaCO3 or Ca(OH)2 were added to PTFE to prevent from producing harmful gases and to fixate F in the residue as CaF2 by acid-base reaction between PTFE and CaCO3 or Ca(OH)2. In a series of pyrolysis experiments, F in PTFE was fixated in the residue as CaF2. The yields of F as a CaF2 were about 20-40wt% in the case of CaCO3 addition and 50-60wt% in the case of Ca(OH)2 addition. To raise the yield of F as CaF2, Ca(OH)2, PE(polyethylene) and zeolite were added to PTFE. About 80wt% was obtained for the yield of F as CaF2. It is revealed that simultaneous pyrolysis of PTFE and PE promotes the formation of HF and is effective in the fixation F as a CaF2.

著者

兪 洪欽 八木田 浩史

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第24回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.288-289, 2015-07-27 (Released:2017-03-22)

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The subject of this study is two meat production systems. One system is that craftsmen production the meat in domestically but the feed was imported, focus of this study compares the environmental efficiency of two meat production systems. One system is where the livestock is grown domestically, but the feed is imported. The other system is where the meat is produced overseas then imported into Japan. The results of this study shows that when using the same production systems and same economic situation, chicken had the highest environmental efficiency, and chicken was followed by pork, then beef. The study confirmed that the environmental efficiency of meat production in the domestic situation was higher than meat production imported from overseas.

著者

岡﨑 文保 坂上 寛敏 山下 聡 八久保 晶弘 小西 正朗 館山 一孝 木田 真人 南 尚嗣

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第30回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.16-17, 2021-07-28 (Released:2021-08-16)

参考文献数

2

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In the sea area around Hokkaido, the existence of bottom simulating reflectors (BSR) has been confirmed off Abashiri, Okushiri Island, Hidaka, and Tokachi. In November 2020, we succeeded in collecting methane hydrate present in the surface layer of the seafloor in the Pacific Ocean off Tokachi. Attempts a direct reforming methane dissociated from the methane hydrate, was successfully hydrogen generation by a chemical reaction that does not generate carbon dioxide. In addition, carbon could be recovered as carbon nanotubes with high utility value.

著者

江口 敏記 井上 学 河野 大樹 浅井 孝則 野中 重太郎 坂輪 光弘

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第12回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.392-393, 2003-07-30 (Released:2017-03-22)

著者

位田 晴良 帰山 恭輔

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第25回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.80-81, 2016-08-02 (Released:2017-03-01)

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Operating conditions such as engine speed and load of diesel engines change the combustion state. In addition, the thermal efficiency and PM emission characteristics are greatly affected by the combustion state. On the other hand, Bio Diesel Fuel (BDF) contains a lot of oxygen, but the ignitability is inferior because the viscosity is high compared with gas oil. However, the previous researches found out that while gas oil and BDF are different fuel properties, the operating conditions to lose the remarkable difference of the thermal efficiency and the PM exhaust characteristic when using these with Diesel engines. In this research, operation conditions were examined while paying attention to the PM exhaust characteristic that changed by the combustion state by the performance examination of the diesel engine using BDF.

著者

金 均虎 本藤 祐樹 森泉 由恵

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第28回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.290-291, 2019-07-31 (Released:2019-07-31)

参考文献数

6

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The present study aims to estimate CO2 emissions from decommissioning of solar and wind power plants. Using a hybrid method that combines process and input-output analyses, the CO2 emission is calculated based on an average decommissioning cost, which is estimated from the detailed construction cost data for different types of power plants. For a solar photovoltaic power plant, the estimated CO2 emission at the demolition stage is 2.1 g-CO2/kWh (tentative value), which accounts for about 4% of life cycle CO2 emission including the construction, operation and maintenance stages.

著者

片野 大地 小澤 弘宜 荒川 裕則

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第22回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.196-197, 2013-07-29 (Released:2017-03-22)

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In order to improve the solar cell efficiency of highly durable glass-substrate dye sensitized solar cll (DSC) using 3-methoxypropionitrile (MPN) electrolyte solvent, a systematic study on the optimization of TiO_2 photoelectrode was conducted. By the fine tuning of light harvesting efficiency (LHE) and film thickness of TiO_2 photoelectrode to the optimized structure, solar cell efficiency improved from 7.2% up to 8.5%. Moreover, the co-sensitization of black dye with organic dye, D131, was applied to MPN electrolyte system. Finally, efficiency improved up to 9.0%, which is one of the highest efficiencies in MPN-based DSC system.

著者

山本 晃司 天満 則夫 阿部 正憲

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第29回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.18-19, 2020-07-29 (Released:2020-07-29)

参考文献数

1

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The study program of the MH21 research consortium for methane hydrate resources in Japan was concluded in 2019 with many outcomes such as the world’s first offshore production test (2013). However, the achieved production rates still fell short of the economical criteria. The analyses and evaluations of the obtained data and experiences revealed some important factors such as excess water production and formation damages around wellbores. The newly started phase 4 study focuses on the development and verification of technologies that solve the technical challenges.

著者

島根 大輔 古川 茂樹 山崎 博司

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 (ISSN:24238317)

巻号頁・発行日

vol.19, pp.294-295, 2010

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Experimental study has been conducted on the occurrence of boilover processes in the pool fire. The flame and water temperatures and optical energy were measured during the pool burning of hydrocarbon with high boiling point. n-Hexadacane layer with emulsion layer were composed on the water sublayer in the cylindrical container. Attention was mainly paid for temperature conditions at the occurrences of boilover in the pool burning processes. It is concluded that the time for extinguishment become to shorten by existing of emulsion layer, in which boilover processes were largely changes. Occurrence conditions of boilover were also discussed by time histories of flame, emulsion layer and water sublayer with optical energy from pool fire.

著者

鈴木 高広 坂本 勝 川上 高男 久保 裕志 茂木 志生乃 浅川 隆

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 (ISSN:24238317)

巻号頁・発行日

vol.29, pp.106-107, 2020

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<p>We investigated a method of using sewage as liquid fertilizer for mass production of fuel crops. At the sewage treatment plant in Shizuoka Prefecture, when root-zone irrigation was performed with multi-layer cultivation of sweetpotatoes with sewage after removal of contaminants and solids, fine roots grew on the liquid surface and grew using nutrients in sewage. It was found that the productivity was more than three times that of ordinary soil cultivation.</p>

著者

何 英洛 楊 國輝 椿 範立

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 (ISSN:24238317)

巻号頁・発行日

vol.30, pp.12-13, 2021

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<p>As one of the Holy Grail reactions in C1 chemistry, direct selective oxidation of methane to methanol under mild and non-harsh conditions remains a big challenge. Hydroperoxide (H₂O₂), as a primary oxidant, applied widely in the lowtemperature direct selective conversion of methane to methanol. Moreover, the hydrogen and oxygen mixture gas achieves better reaction activity and higher methanol selectivity than H₂O₂ when using palladium-gold (Pd-Au) bimetallic nanoparticles as the catalyst. In this paper, we studied the key roles of the physical and chemical characteristics of Pd-Au nanoparticles in this direct selective oxidation reaction with hydrogen and oxygen as the oxidant at 50°C. For further clarifying the physical and chemical characteristics of catalysts, X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Hydrogen-Temperature-programmed reduction (H2-TPR), and CO pulse adsorption measurement (CO-PULSE) analysis methods are also measured.</p>

著者

長澤 拓 鈴木 健太 雑賀 高

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 (ISSN:24238317)

巻号頁・発行日

vol.21, pp.242-243, 2012

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Ammonia is focused on as a no carbon fuel, and the design of the fuel cell vehicle with onboard devices to generate hydrogen from ammonia is performed. The ammonia has higher hydrogen content by percentage than that of methanol or ethanol, and can be liquefied at a normal temperature and a pressure of 0.84 MPa. Therefore the ammonia has a possibility as a new energy, because it can be obtained from biomass energy such as urea.

著者

天谷 賢児 宝田 恭之 松村 修二 澁澤 香代 小曽根 操 宗村 正弘 根津 紀久雄 大沢 善康

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 (ISSN:24238317)

巻号頁・発行日

vol.21, pp.292-293, 2012

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Micro hydroelectric generation facilities with battery systems were developed for the electric power supply of the EV and micro-EV. Micro-EV was developed as single driver vehicle for the town use only. These vehicles were used for the CO_2 reduction experiments and for the enhancement of regional community power. Solar energy systems were also used for mobility of micro-EV. In this paper, the some experimental trial about the EV utilization for the community development is reported.

著者

小林 雅英 榎本 啓士 前田 光博 稗田 登 寺岡 喜和

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 (ISSN:24238317)

巻号頁・発行日

vol.26, pp.102-103, 2017

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<p>These days, the amount of domestic waste is decreasing in association with the depopulation and the need for small scale garbage disposal plant is growing among local governments. In this research, we imitated the power generation from biomass resources that includes domestic waste. We gasified woody biomass by using mixed gas of nitrogen as an oxidizing agent and measured the composition of the bio-syngas, temperature in the reactor and so on. Consequently, the bio-syngas produced low heat value. It is believed that the carbon conversion efficiency and the cold gas efficiency decreases when the flow rate of an oxidizing agent increases or the quantity of supplied oxygen into the reaction field decreases.</p>

著者

斎藤 一輝 榎本 啓士 小林 雅英 稗田 登 寺岡 喜和

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 (ISSN:24238317)

巻号頁・発行日

vol.27, pp.250-251, 2018

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<p>Woody biomass of various moisture content for gasification of woody biomass is used. But there are few previous studies on woody biomass with moisture content of 15% or less. Therefore, we made a small scale gasifier and studied the effect of moisture content of woody biomass on gasification by using woody biomass reduced moisture content. It was found that carbon conversion efficiency and cold gas efficiency can be high depending on the moisture content.</p>

著者

ZOLTUYA Khashbaatar 金 熙濬 BAYARTSAIKHAN Tsendee NARANTSETSEG Magsarjaw

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 (ISSN:24238317)

巻号頁・発行日

vol.29, pp.126-127, 2020

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<p>Pyrolysis and combustion process of Mongolian Pine tree sawdust have been investigated by the isothermal thermogravimetric technique, at several different operating temperatures using the vertical fixed bed reactor. Gas chromatography analysis was employed to characterize the composition of evolving gas in samples during the pyrolysis process. Thermal degradation results showed that pine sawdust mainly devolatilized around 300-450°C temperatures with total volatile yield about 78%. When it is comparing with the Mongolian brown coals, devolatilization was higher at above 600°C (the volatile yield was 39-54% for all brown coals) than lower temperatures (7-32% at 600°C˂). The reaction kinetics activation energy (<i>Ea</i>), pre-exponential factor (<i>A</i>) were determined using first-order method for pyrolysis process. The apparent activation energy of Pine sawdust is 29.3 kJ/mol during pyrolysis process at range temperature of 600-900°C. The main evolving gaseous products during pyrolysis were H₂, CH₄, CO, CO₂, and their yields were relatively each pyrolysis temperatures.</p>

著者

河村 真由 高木 裕行 石井 仁子 菅野 元行 平野 勝巳 真下 清

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 創立80周年記念大会 (ISSN:24238317)

巻号頁・発行日

pp.176-177, 2002-08-01 (Released:2017-03-22)

著者

小竹 裕人 関 庸一 天谷 賢児 清水 宏康

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第25回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.244-245, 2016-08-02 (Released:2017-03-01)

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Low-speed electric bus was developed for building the low-carbon society. The bus has eight wheels with in-wheel motors, and its maximum speed is 19km/h. Demonstration and social experiments were carried out in the Kiryu city in order to investigate the enhancement effect of local community. In this study, we revealed the re-vitalization effect of local community by the introduction of low-speed electric bus on the basis of a questionnaire survey.

著者

歌川 学

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第27回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.248-249, 2018-08-01 (Released:2018-07-31)

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To achieve an active public consensus on Japan’s massive GHGs reduction policy, this paper presents reduction scenario of CO2 emissions from fuel combustion in Japan to 2050 by technology options and demand sift under population shrinking society. Even though based on industrial production scenario same as association of industries in Japan, CO2 emissions in 2050 could be reduced more than 80% from 1990 level by energy conservation and sift to renewable energies. In addition with material sift, CO2 emissions in 2050 could be reduced 95% from 1990 level. It is estimated that these investment can be recovered by the energy cost reduction. The employment created by the investment estimated about 1 million, and about 0.2 million at local as new large employment.

著者

前田 治男 五十嵐 雅之 小林 肇

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第26回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.62-63, 2017-07-25 (Released:2017-07-25)

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Carbon Capture and Storage (CCS) technology, which is currently being developed around the world, could become a practical countermeasure to reduce emissions of the greenhouse gas. Depleted petroleum reservoirs and aquifer have been proposed as candidate sites of CCS. The long-term aim of this research is to establish a bio-technological system to convert geologically-stored CO2 into methane, as an energy resource. To develop a means for the conversion, we focus on technological application of a bio-electrochemical system using microbial catalyzed electrode (bio-cathode).