Site items in: Content by Author Kimio Iino

Content Types

To take a deep dive into our archives, please select filters and click Search. Search Results (Found )

Display Options

No Results Found.

Please try modifying your filters and filtering again.

Please add a keyword and/or a dropdown filter to generate a precise search, or use the sitewide search at the top of the page for a more general search.

Searching... Please wait[cancel Search]

Presentation

NH3 / N2 / O2 Non-Premixed Flame in a 10 kW Experimental Furnace – Characteristics of Radiative Heat Transfer

Ryuichi Murai Ryohei Omori Ryuki Kano Yuji Tada Hidetaka Higashino Noriaki Nakatsuka Jun Hayashi Fumiteru Akamatsu Kimio Iino Yasuyuki Yamamoto Yoshiyuki Hagiwara

There are severe issues on increasing amount of carbon dioxide (CO2) emission in the world. Many studies are devoted on alternative fuels. One of superior candidates is the utilization of hydrogen energy which can realize a low-carbon and hydrogen-based society. Ammonia might play an important role which is zero emission of CO2, and is useful for hydrogen energy carrier as a clean energy. Additionally, ammonia is an easily-liquefiable fuel with pressure of about 0.86 MPa and temperature of 293 K. Commercially, ammonia is produced in large quantity by the Haber–Bosch process. It is also to be produced by using catalyst…

Presentation

Effects of the Thickness of the Burner Rim, the Velocities of Fuel and Air on Extinction Limit of Ammonia Coaxial Jet Diffusion Flame

Yohei Ishikawa Jun Hayashi Hiroyuki Takeishi Takahiro Okanami Kimio Iino Fumiteru Akamatsu Yasuyuki Yamamoto Yoshiyuki Hagiwara

Ammonia is regarded as one of the alternative fuels because CO2 doesn’t emit during the combustion process of ammonia. Ammonia also has advantages in storage and transportation. In addition, ammonia has a potential to be a “hydrogen carrier” because of high amount of hydrogen content. However, there are several combustion related problems such as the low flammability, the low radiative power and the high NOx formation. To use ammonia as a fuel, therefore, it is necessary to understand the fundamental phenomena of the combustibility of the ammonia such as laminar burning velocity, strength of the radiation and extinction limit. Since…

Presentation

Characteristics of Ammonia / N2 / O2 Laminar Premixed Flame in Oxygen-enriched Condition

Hiroyuki Takeishi Jun Hayashi Shota Kono Kimio Iino Fumiteru Akamatsu

The problems of ammonia fuel are a low combustion qualities compared with the combustion qualities of hydrocarbon fossil fuels. In this study, the laminar burning velocity was used as the indicator of the combustion quality. Since the laminar burning velocity of ammonia fuel is low compared with that of other fossil fuels, it is necessary to increase the combustion quality in order to utilize the ammonia as an alternative fuel in conventional combustion systems. In this study, the oxygen-enriched combustion was applied to an ammonia/N2/O2 premixed flame for achieving higher burning velocity. The effects of the oxygen-enriched combustion on the…