Výsledky vyhledávání - "Yukihiko OKUMURA"

Akademický článek

Ventilation design of tour buses for suppressing airborne transmission and highly efficient virus elimination in post COVID-19 period

Autor: Yoshiki MAKIHIRA, Yukihiko OKUMURA

Publikováno v: Mechanical Engineering Journal, Vol 11, Iss 1, Pp 23-00523-23-00523 (2024)

Measures to prevent the spread of COVID-19 are critical across the globe. A tour bus can carry passengers; however, the small, closed space becomes congested owing to their presence for long periods. Therefore, there is an increased risk of infection

Externí odkaz: https://doaj.org/article/b1fc0cb8ee3d4b54b2382d36d70e70e5

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Akademický článek

Quantitative analysis of primary tar yields volatilized from biomass (Effect of heating rate and biomass type on tar components)

Autor: Yukihiko OKUMURA

Publikováno v: Journal of Thermal Science and Technology, Vol 16, Iss 2, Pp JTST0029-JTST0029 (2021)

Although rapid pyrolysis affords higher volatile yield than slow pyrolysis, the change in the yield of components at different heating rates have not been reported in detail. Moreover, few studies have assessed the changes in the tar component yield

Externí odkaz: https://doaj.org/article/e2e8f6618e8649cdb06f6a8e2ad85bf6

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Akademický článek

Detailed gasification process of woody biomass-derived char with H2O and CO2 gasifying agents

Autor: Yukihiko OKUMURA

Publikováno v: Journal of Thermal Science and Technology, Vol 15, Iss 3, Pp JTST0035-JTST0035 (2020)

To effectively utilize renewable biomass resources, gasification technology is being actively developed. Many studies have been performed regarding the gasification of biomass-derived char (i.e., biochar), where the gasification rate varies greatly w

Externí odkaz: https://doaj.org/article/9155e3468efa45bf93ce994622b209e3

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Akademický článek

Study on the N2O Formation under Low Temperature Condition in Pulverized Biomass Combustion

Autor: Yukihiko OKUMURA, Hirotatsu WATANABE, Ken OKAZAKI

Publikováno v: Journal of Thermal Science and Technology, Vol 7, Iss 1, Pp 75-89 (2012)

The purpose of this study is to clarify the fundamental and general features of N2O formation during the combustion of pulverized biomass under low temperature. First, the effect of various important factors, i.e., combustion temperature, volatilizat

Externí odkaz: https://doaj.org/article/374c5400f6e7494eb6eb5f42e756281a

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Akademický článek

Effect of Synthesis Condition on Electrical Characteristic of Diamond Film Produced by C2H2/O2 Combustion Flame

Autor: Yukihiko OKUMURA, Kouichi KANAYAMA, Yosuke TERAKI

Publikováno v: Journal of Thermal Science and Technology, Vol 4, Iss 1, Pp 178-189 (2009)

In this study, we attempted to clarify the electrical characteristics of diamond films synthesized by combustion flame and consequently synthesizing a suitable diamond film for use in electronic device applications. When the film contains amorphous c

Externí odkaz: https://doaj.org/article/099464ebed184aafb706fbd7805f56ec

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Akademický článek

Effect of metal content on CO2 gasification behavior of K- and Fe-loaded bio-chars

Autor: Toshiaki HANAOKA, Yukihiko OKUMURA

Publikováno v: Journal of Thermal Science and Technology, Vol 9, Iss 2, Pp JTST0006-JTST0006 (2014)

The effects of Fe and K contents of Fe- and K-loaded chars containing 0-23% Fe and 0-20% K, respectively, with negligible amounts of poisoning elements, on the CO2 gasification behavior (C + CO2 → 2CO) were investigated in the temperature range of

Externí odkaz: https://doaj.org/article/fd1c2697c0cd48f8a835723522f738a6

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