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, 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.

Read the abstract at the AIChE website.

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RELATED NH3 FUEL CONFERENCE PAPERS

2018: Simulation Analysis of NH3 Mixed Combustion in Clinker Manufacturing Process
2018: Optimization of the NOx Reduction Condition in the Combustion Furnace for the Combustion of “Heavy-Oil – NH3 System” Using CFD

LINKS

UBE Industries
Combustion Engineering Laboratory, Osaka University
Learn more about the 2018 NH3 Fuel Conference

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