The effects of K/Na on the gasification reaction of coke with CO2 or steam were studied by self-made gas?solid reaction device. The results showed that the effect of K/Na on coke gasification reaction with CO2 is stronger than that with steam. While the content of Na in coke increased from 0.045wt% to 0.727wt%, the reactivity index of coke with CO2 and steam increased by 23.17% and 14.35% respectively, and the coke strength decreased by 27.55% and 18.31% respectively after reaction. With the increase of K/Na content in coke, the apparent start temperature, severe reaction temperature and apparent activation energy of coke gasification reaction with CO2 and steam were obviously reduced. While the content of Na in coke increased from 0.045wt% to 0.727wt%, the apparent start temperature of coke gasification reaction with CO2 and steam ahead of 170 and 20℃ respectively, and the severe reaction temperature ahead of 165 and 80℃ respectively. While the content of Na in coke increased from 0.045wt% to 0.326wt%, the apparent activation energy of coke gasification reaction with CO2 and steam decreased by 22.56 and 9.26 kJ/mol respectively.
Ping WANG Yu WU Hongming LONG Zhanxia DI Jiaxin LI Rufei WEI Shucai YU
. Effect of alkali metal on gasification reaction of coke with CO2 and steam[J]. The Chinese Journal of Process Engineering, 2018
, 18(4)
: 743
-749
.
DOI: 10.12034/j.issn.1009-606X.217373
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