METHOD FOR PREPARING ASH-FREE COMPOSITE COAL HAVING INCREASED REACTIVITY AND ASH-FREE COMPOSITE COAL PREPARED THEREBY

摘要

The present invention relates to a method for preparing ash-free composite coal by uniformly mixing an organic component extracted from coking coal with oil in an extraction separation step and solidifying the mixture, and ash-free composite coal prepared thereby. The ash-free composite coal of the present invention exhibits high reactivity since vegetable or animal oil containing C8 to C20 fatty acid, fatty acid ester or triglyceride components, having a significantly higher reactivity than coal, is present by being uniformly mixed with the organic component extracted from coal. Since the ash-free composite coal of the present invention exhibits high reactivity, in a case where a catalytic gasification reaction is carried out, it is possible to carry out the reaction under milder conditions when compared to existing ash-free coal. The ash-free composite coal of the present invention is reusable since catalyst activation is not significantly lowered even when the catalytic gasification reaction is carried out, thereby being very economical. The ash-free composite coal of the present invention contains a carbon neutral biomass component, that is, vegetable or animal oil, thereby reducing CO₂ emissions.