Interactions of aqueous metal ions with organic compounds found in coal gasification: model systems

Abstract

The interaction of metal ions with organic compounds indigenous to coal gasification materials was studied in a model system. Aqueous solutions of FeT , CuS and NiS in contact with mixtures of selected organic compounds were examined by using chromatographic and spectroscopic techniques. Aqueous FeT ions and, to a lesser extent, CuS ions extract organic compounds from the nonaqueous layer and associate with these organic molecules in aqueous solution. Quantitative aspects of the extraction process were measured by gas chromatographic methods, while spectroscopic measurements were used to characterize the association between metal ions and organic molecules. The interaction of the metal ion solutions was compared to that of buffers of similar pH. The behavior of both the iron and copper ion solutions differed from that of the buffers.