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Presentation

Evaluation of the Cement Clinker Fired in the Combustion Furnace of Heavy-Oil and NH3

Hiroki Kujiraoka Tatsurou Izumi Yuya Yoshizuru Takeshi Suemasu Makoto Ueda Toyoaki Niki Takayasu Itou Ryuichi Murai Fumiteru Akamatsu

In recent years, global warming caused by an increase in CO2 emission released by combustion of fossil fuel has become a big problem. To realize a low-carbon society, active use of renewable energy and promotion of hydrogen energy are necessary. We are participating in “SIP (Strategic Innovation Promotion Program) energy carriers”, developing technology to replace 30% fossil fuel with ammonia (NH3) on the calorie basis. Assuming that NH3 is used as a thermal energy for a cement kiln, we conducted the following two basic experiments. First, we fired the clinker in the atmosphere-controlled electric furnace, calculated the reaction rate of…

Presentation

Experimental and Computational Study for Reduction of NOx Emissions in the Ammonia / Methane Co-Combustion in a 10 KW Furnace

Ryuichi Murai Ryohei Omori Takahiro Kitano Hidetaka Higashino Noriaki Nakatsuka Fumiteru Akamatsu Yuya Yoshizuru Jun Hayashi

There are severe issues on increasing amount of carbon dioxide (CO2) emission in the world. Many studies are devoted to alternative fuels. One of promising candidates is the utilization of ammonia which is zero emission of CO2, a hydrogen energy carrier, and also can be burned directly as a fuel. For direct combustion of ammonia in industrial furnaces, there were two issues which were weaker radiative heat flux and a huge amount of NOx emission compared with the combustion of methane. We already have reported [1] the solution of the former issue by using the oxygen enriched combustion. The objective…

Presentation

Optimization of the NOx Reduction Condition in the Combustion Furnace for the Combustion of "Heavy-Oil - NH3 System" Using CFD

Yuya Yoshizuru Takeshi Suemasu Masayuki Nishio Ryuichi Murai Fumiteru Akamatsu

In late years the discharge of the CO2 became the very big problem. The combustion of the fossil fuel in particular exhausts much CO2. Our project team (SIP) is intended to reduce CO2 by using NH3 (10%~30%) in substitution for heavy oil. The ‘SIP energy carriers’ was launched in 2014 (SIP: Strategic Innovation Promotion Program). Ammonia direct combustion team was formed. We conducted a co-research program with Osaka University in this project. We performed experiment of heavy oil – NH3 mixed combustion in the 10kW furnace. As the results, we obtained much experimental data. When we were combusted NH3 and…

Presentation

Simulation Analysis of NH3 Mixed Combustion in Clinker Manufacturing Process

Tatsurou Izumi Hiroki Kujiraoka Yuya Yoshizuru Takeshi Suemasu Makoto Ueda Toyoaki Niki Takayasu Itou Masayuki Nishio Ryuichi Murai Fumiteru Akamatsu

Recent years, the action for the low-carbon society becomes active all over the world. NH3 has potential to become the free-carbon energy source. In SIP project, that Cabinet Office started, we work on the technology development applying NH3 to the field of industrial furnace (SIP: Strategic Innovation Promotion Program). In this study, we evaluated the effect of NH3 use in the cement clinker manufacturing process. Cement manufacturing is one of the fields of industry to exhaust large amounts of CO2. As past works, we studied for the reduction of heat consumption rate, troubleshooting and so on by using kiln operation…

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…