Under chemical reaction kinetics control conditions

the effects of analytically pure ammonia on gasification of Jinjie coal char in CO_2 atmosphere catalyzed by CaO were investigated. The experimental results show that

after adding the aqueous ammonia

both the gasification activation factor K and average gasification rate R_m of the raw coal char increased

but to different extents. The enhancement got obvious with the increasing gasification temperature. At 900 ℃

the K and R_m of the raw coal char increased by 20.3% and 9.3%

respectively. The increase of K and R_m of the CaO catalyzed coal char reached the maximum at 850 ℃

about 49.7% and 35.9%

respectively. After adding the aqueous ammonia

the gasifying activation energy of the raw coal char and the CaO catalyzed coal char increased to some extent

and the increasing ranges was 9.5% and 14.8% respectively. The result provides a method and research direction to improving the efficiency and rate of coal gasification.