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02 liquid fuels (sources, properties, recovery,) A thermogravimetric investigation took place into the influences of amount and conditions of the colloid disperse phase, such as asphaltenes and resinous substances on boiling behaviour and evaporation enthalpy important for the design of distillation apparatuses, by heating rates of 5, 10 and 20 Wmin. Measurements are executed on reduced crude, short residue and visbreaker residue with and without various portions of asphaltenes to show their influence. The results are discussed on the basis of an Arrhenius approach considering the influence of heating intensity and activation energy on sampling gravimetric material loss. It is shown that the presence of colloids is needed even for the evaporation enthalpy.
๐ SIMILAR VOLUMES
The heat capacity of molybdenum chalcogenides with different Sn/ Ga content was measured at temperatures of T <-60 K. The occurrence of two phases of the chalcogenides studied could clearly be seen for higher Ga concentrations. In the miscibility gap there coexists a superconducting phase (Tr = 12.5