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INVESTIGATION OF DICTYONEMA OIL SHALE AND ITS NATURAL AND ARTIFICIAL TRANSFORMATION PRODUCTS BY A VANKREVELENOGRAM

2003; Estonian Academy Publishers; Volume: 20; Issue: 3 Linguagem: Inglês

10.3176/oil.2003.3.04

1736-7492

R Veski, Vilja Palu,

Atmospheric and Environmental Gas Dynamics

The elemental composition of organic matter of Ordovician Dictyonema oil shale from Maardu, Toolse and other Estonian as well as from Russian and Swedish deposits (local name 'alum shale'), natural and artificial transformation (beneficiation, extraction, thermal and oxidative destruction) products of Dictyonema oil shale are visualized using a vankrevelenogram.It is a van Krevelen's H/C-O/C diagram used to compose a database of a certain fuel and its transformation products to characterize this object from different aspects.Graphostatistical investigations of the composition of Dictyonema oil shale organic matter indicate that the shale subjected to study by most researchers was unknowingly to them the weathered one.The methods to evaluate the composition of organic matter of Dictyonema oil shale used in coal and "common" oil shale chemistry had to be replaced by the ones used in dispersed organic matter study. AbbreviationsDOS -Dictyonema oil shale; OM -organic matter; MM -mineral matter.S t , S SO 4 , S p , S -total, sulphatic, pyritic and organic sulphur, respectively.HA -humic acids.C -carbon; H -hydrogen; N -nitrogen; S -sulphur; O -oxygen of OM.O is used in this paper in two different meanings:(Ratios of organic elements are given as atomic ones.If mass ratios used it is specially mentioned.All indices about oil shale composition are presented on dry basis, percentage expressed as mass per cent, if not, then specially mentioned.