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The order of catalytic activity of three alkali carbonates (Li2CO3, Na2CO3, and K2CO3) towards the steam gasification of coal char varies depending on the presence and absence of the acidic mineral species and their enrichment in coal. In the gasification of an ash-rich coal char, Li2CO3 exhibits the severest catalytic deactivation among three alkali carbonates, whereas Na2CO3 is the most resistant...
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