A5032457008- Thermochemical Biomass Conversion Processes
- Wastewater Treatment and Nitrogen Removal
- Catalysts for Methane Reforming
- Catalytic Processes in Materials Science
- Anaerobic Digestion and Biogas Production
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Polyoxometalates: Synthesis and Applications
- Geochemistry and Geologic Mapping
- Advanced battery technologies research
- Supramolecular Chemistry and Complexes
- Molecular Junctions and Nanostructures
- Chemical Looping and Thermochemical Processes
- Nuclear reactor physics and engineering
- Advanced oxidation water treatment
- Photochromic and Fluorescence Chemistry
- Microbial Fuel Cells and Bioremediation
- Carbon Dioxide Capture Technologies
- Agriculture, Soil, Plant Science
- Subcritical and Supercritical Water Processes
- Coal and Its By-products
- Catalysis and Oxidation Reactions
- Methane Hydrates and Related Phenomena
- Molten salt chemistry and electrochemical processes
- Machine Learning in Materials Science
Tokyo University of Science
2024
Gunma University
2018-2021
Tohoku University
2013-2021
Tokyo Metropolitan University
2015
Two-dimensional, π-conjugated coordination nanosheets (CONASHs) have attracted significant attention because of their potential applications in electronics and electrode materials. However, multilayer stacking induced by π–π interlayer interaction originating from flat chemical structures shields the metal complex sites decreases performance. The triptycene-linker ligands CONASHs form square-planar complexes perpendicular to horizontal planes nanosheets, C–H bonds ligand are directed out...
Development of efficient electrocatalysts for hydrogen evolution reactions (HERs) is necessary to achieve environmentally friendly and sustainable production. To reduce cost circumvent the scarcity platinum, most catalyst HER, it essential develop catalysts using ubiquitous base metals or minimal amounts precious noble metals. Bis(diimino)metal (MDI) coordination nanosheets are potential HER because their electric conductivities, two‐dimensionality, porous structures provide large surface...
Starting from a chiral resolution of 2-ethylhexanoic acid followed by conversions functional groups without interfering with the enantiopurity, we have successfully introduced an enantiopure 2-ethylhexyl group on to dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene (DNTT) via Negishi-coupling reaction synthesize 2-(R)-(2-ethylhexyl)- and 2-(S)-(2-ethylhexyl)-DNTT (R- S-EH-DNTT, respectively). Then, crystallinities, thin-film structures, organic field-effect transistors (OFETs) based R-, S-...
Syngas of biomass is touted as an alternative energy due to its environmentally clean fuel and reducing greenhouse effect. Utilization through gasification usually intended for power generation produce syngas. The syngas proposed methanol production using local catalyst. assessment low cost, temperature pressure was conducted by catalyst that has been developed. role the key achieve optimal conditions lower activation energy. This study highlighting synthesis with Cu-based impregnation γ...
Gasification is one of the technologies to process biomass as a renewable alternative energy source. Steam gasification using various clays derived from Indonesia was carried out with laboratory scale fluidized bed reactor evaluate activities clay catalysts. At same time elucidated relationship between material characteristics and activity. Tar capturing ability compared for activated clay, silica sand minerals by reactor. Even raw were found reduce heavy tar water-soluble species emissions...
This paper describes the construction and operation of 1,090MW gas-steam combined cycle power plant, one largest its kind in world. The plant consists two trains, each which combines three sets gas turbines heat recovery steam generators with set turbines. A turbine burns gasified LNG as fuel firing temperature 1,154°C at base load operation, highest now service, a newly developed low NOx premixing type combustor system generates 133MW maximum. was started March, 1982 first train, namely,...
Research on the development of sustainable alternative fuels to replace fossil has received serious attention because increasing world oil prices and environmental concerns.This study focused Dual Fluidized Bed Gasification technology, especially cold model performance obtain hydrodynamic characteristics bed material.The performances are carried out at Lab.Biomass PTSEIK BPPT Gedung 625 Puspiptek Serpong.Bed material used is silica sand which circulated externally from combustor gasifier...
本研究はメタン生成古細菌(methane-producing archaea; MPA)と硫酸塩還元細菌(sulfate-reducing bacteria; SRB)の基質競合に及ぼす酸素,pHショックおよびH2Sの影響を究明することを目的として,UASBによる高濃度硫酸塩含有廃水の連続処理を360日間行った。リアクターの上部で微曝気をすることにより硫酸塩除去率が45.0%から68.6%に若干増加したが,メタン生成がリアクター内の主反応であった。また,pHショックと容積負荷の影響により硫酸塩還元が更に進行した。水中未解離性硫化水素濃度が200 mg·L-1以上になることで,MPAに阻害影響を及ぼすようになり,リアクター内のメタン生成反応は完全に抑制された。UASBリアクターの処理性能とグラニュールの16S rRNAクローンライブラリーによる解析の結果から,完全な硫酸塩還元段階では不完全酸化型SRBにより,エタノールを利用する硫酸塩還元反応が活発に進行していたことが明らかとなった。
エタノール，酢酸および硫酸塩を含む有機合成化学工場廃水に対するUASBプロセスの適用性を評価するために，COD/SO42- 比を20から0.5まで変化させた連続実験を行った。連続実験の結果から，COD/SO42- 比が20，COD容積負荷が25.2 g-COD·L-1·d-1の条件で，87.8％の高いCOD除去率が得られた。高濃度硫酸塩（6000 mg·L-1）およびCOD/SO42- 比が0.5の場合，79.2％のCOD除去率と0.20 L-CH4·g-COD-1のメタン生成率が維持された。COD/SO42- 比が20から0.5まで低下するのに伴い，流入CODのメタンガスへの転換率は80.5％から54.4％まで低下した。各COD/SO42- 比でメタン生成古細菌に利用された電子は79.4％以上であることから，メタン生成反応はリアクター内の主反応であることが明らかとなった。
Biomass waste has been emerging as an alternative energy and fuel. Direct combustion of biomass leads to harmful substances such NOx CO which are environmentally unfriendly manner. Innovation clean technologies like gasification would have a potential in developing technology reduce the emissions into environment. The syngas is intermediate product can be converted further various types fuels especially methanol. Agency for Assessment application Technology (BBPT)-Indonesia cooperation with...
本研究では，インドネシア産の９種類の粘土粒子を流動媒体として実施したバイオマス水蒸気ガス化実験で得られた生成物のデータと使用した粘土の物性データを用いて，統計学的手法を用いて両者の因果関係を定量的に把握することが目的である。まず，因子分析により，実験で得られた５種類の物質収量を説明する２つの共通因子と，粘土の物性値（11種類）を構成する４つの共通因子が抽出された。その後，抽出された因子間の相関関係を重回帰分析により定量化し，物性データからガス化特性を予測する相関式を求めた。得られた相関式は，ガス化生成物の生成量を良好に予測することができた。得られた相関式と共通の因子を持つ物性値あるいは生成物データの相関係数から，特定の物性値が生成物データに及ぼす影響を定量的に評価した。その結果，ガスの収率向上には，比表面積の増加あるいはカリウム含有量の減少およびマグネシウムの減少が高い影響を持つ。一方で，タールの削減には酸量の増加および細孔径および細孔容積の増加が高い影響を持つことを明らかにした。