Vol. 59 No. 4 (2022)   Carbon Neutral
Technical Papers

Development of Ammonia Co-firing Technology for Coal-fired Boilers toward Decarbonized Society

TAKATOSHI YAMASHITA
TAKESHI AMARI
YUICHIRO URAKATA
TADASHI SUMIDA
TERUYUKI OKAZAKI
AKIMASA TAKAYAMA

Thermal power generation utilizing hydrogen and ammonia as fuels is considered one of the leading options for decarbonization to achieve carbon neutrality by 2050. In particular, the decarbonization of coal-fired boilers by ammonia co-firing is presented in the national roadmap for the establishment of a fuel ammonia supply chain. Mitsubishi Heavy Industries, Ltd. (MHI) is developing technologies to enable higher ammonia co-firing rate for both circular firing and opposed firing systems of coal-fired boilers in order to meet various customer requirements. This report presents findings on the combustion characteristics of ammonia obtained to date and a schedule for future development toward realizing the practical use of this technology.