Application of microbiological activation In the production of carbon molecular sieves
This work is devoted to the study of the effect of microorganisms on granular carbon-containing materials in order to achieve the necessary structure and porosity of the sorbent. Since carbon materials can sorb microorganisms and can be a nutrient medium for them, it has been suggested that hydrocarbon oxidizing bacteria can be used to activate carbon materials in order to achieve the necessary porosity of the material. For this purpose, laboratory samples of granulated active coals were obtained using carbonaceous carbon-containing feedstock binder under conditions as close as possible to the active technology for producing active coals. As a carbon-containing raw material, the dust of non-caking coal was used, and the coal binder was used as a binder component. To study the possibility of microbiological activation of carbon materials, a storage culture of microorganisms-hydrocarbon destructors was used. Cultivation of microorganisms was carried out in a nutrient medium containing salts: sodium hydrogenphosphate, potassium dihydrogen phosphate, magnesium sulfate and potassium nitrate with pH = 3; 7 and 10. The dynamics of growth of microorganisms was studied and optimal conditions for their growth were selected. The parameters of microbiological treatment of the carbonaceous and semi-products containing carbonate and carbonized are worked out, their physico-chemical and sorption properties are investigated. It is shown that, with an increase in the processing temperature to 32 ° C and a pH of the medium to 10, an increase in the specific surface and microporous volume is observed, and the sorption properties of the pairs of model substances increase, while the carbonized materials are subject to preliminary preparation.