EPR AND ENDOR STUDY OF CARBON-MINERAL SORBENTS

A character of carbon ordering in carbon mineral systems, such as gamm a-Al2O3 and TiO2 has been investigated using EPR and ENDOR methods. Th e experimental data have been interpreted at the assumption that a spa tial distribution of paramagnetic centers on the surface of aluminum-o xide is 2-dimensional. The results of ENDOR measurements show that no stable covalent bond is formed between the mineral support surface and coke upon carbonization of aluminum oxide by divinyl. The interaction has mainly the ionic character and is easily affected by water.