Abstract
A Montana lignite was treated with HC1 and HF to remove essentially all inorganic constituents and place all carboxyl groups in the proton form. The treated lignite was then exposed to Ca and Mg acetate solutions, either separately or jointly, to add controlled amounts of cations to the carboxyl groups. Following pyrolysis of the lignites, reactivities of their chars in air, CO2, and steam were measured. The presence of Mg is seen to not affect the excellent catalytic activity of Ca for char gasification.
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