Investigation of the Effect of Preliminary Chemical Treatment of Sapropel on the Properties and Texture Characteristics of Carbon-Mineral Materials
O. I. KRIVONOS, E. N. TEREKHOVA, and G. V. PLAKSIN
Institute of Hydrocarbons Processing, Siberian Branch of the Russian Academy of Sciences, Ul. Neftezаvodskаya 54, Omsk 644040 (Russia)
Keywords: углерод-минеральные материалы, карбонизация, щелочной гидролиз, кислотный гидролиз, деминерализация, сапропель, carbon-mineral materials, carbonization, alkaline hydrolysis, acid hydrolysis, demineralization, sapropel
Abstract
The effect of alkaline and acidic treatment on the properties and texture characteristics of native sapropel from Lake Gorchakovskoye (the Omsk Region) and carbon-mineral materials obtained from sapropel through carbonization was studied. It was established that acidic treatment with low-concentration HCl solutions causes an increase in the total pore volume with respect to water in carbon-mineral materials up to 0.42 cm3/g; the ash value decreases without any changes in bulk density due to the removal of the organic and mienral part in native sapropel. Alkaline treatment with the aqueous solutions of NaOH allows achieving the developed surface in the carbon-mienral materials up to 106 m2/g. The major fraction of pores in the treated carbon-mineral materials is represented by mesopores 3.4−5.4 nm in diameter, and macropores more than 600 nm in diameter.
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