Tag Archives: Cement Decarbonization

Yuya Yoshizuru*, Takeshi Suemasu, Masayuki Nishio, UBE Industries, Japan; Ryuichi Murai, Fumiteru Akamatsu, Osaka University, Japan

15th Annual NH3 Fuel Conference, Pittsburgh, PA, October 31, 2018
NH3 Energy+ Topical Conference at the AIChE Annual Meeting

ABSTRACT

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 heavy-oil, a large quantity of NOx is exhausted. We need to conduct that out under many different conditions for NOx reduction (for example, temperature, flow rate and so on.). However, it is impossible to perform it in limited time. Therefore I found some conditions to reduce NOx using CFD. Furthermore, we introduce some conditions to optimize NOx reduction. The combustion mechanism compared the model using the detailed chemical reaction and the simplification reaction mechanism with the experiment. As a result, we became able to be combusted NH3 (30%) under a NOx condition same as heavy-oil (100%). Continue reading →

Tatsurou Izumi*, Hiroki Kujiraoka, Yuya Yoshizuru, Takeshi Suemasu, Makoto Ueda, Toyoaki Niki, Takayasu Itou, Masayuki Nishio, UBE Industries, Japan; Ryuichi Murai, Fumiteru Akamatsu, Osaka University, Japan

15th Annual NH3 Fuel Conference, Pittsburgh, PA, October 31, 2018
NH3 Energy+ Topical Conference at the AIChE Annual Meeting

ABSTRACT

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 analysis tool, KilnSimu. This time, we applied the KilnSimu analysis technology to this work. Continue reading →

Hiroki Kujiraoka*, Tatsurou Izumi, Yuya Yoshizuru, Takeshi Suemasu, Makoto Ueda, Toyoaki Niki, Takayasu Itou, UBE Industries, Japan; Ryuichi Murai, Fumiteru Akamatsu, Osaka University, Japan

15th Annual NH3 Fuel Conference, Pittsburgh, PA, October 31, 2018
NH3 Energy+ Topical Conference at the AIChE Annual Meeting

ABSTRACT

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 CaO which is the main oxide in clinker by Arrhenius type kinetic model. As a result, it was found that the reaction rate of clinker was not influenced by the atmosphere conditions and was dominated by the temperature conditions.

Next, we fired the clinker in the 10 kW furnace under only heavy-oil combustion and mixed combustion of heavy-oil and NH3, identified mineral composition by X-ray diffraction (XRD)/Rietveld analysis, carried out the strength test for cement was made from the clinker. As a result, it was confirmed there was no difference in mineral composition and strength of clinker. Continue reading →