Coal Tar Viscosity when Dissolving Coke Oven Gas Deposits

Abstract

Abstract. 1The data on the viscosity of the tar when dissolving non-substituted aromatic compounds (naphthalene and anthracene) were received. The viscosity coefficients of available empirical equations when adding the naphthalene and anthracene were determined. The rheological properties of the tar on a Brookfield viscometer were investigated with imitative additives. Irregular values of energy activation of viscous flow were established with the additive of certain amount of naphthalene that also correlated with the minimum value of the constant K2 of Walter equation and constant В in the equation of CornelissenWaterman. The above data allow to recommend the temperature ranges and optimal amount of naphthalene for obtaining coal tar with improved rheological properties.

Pyrolytic Modification of Heavy Coal Tar by Multi-Polymer Blending: Preparation of Ordered Carbonaceous Mesophase

“…Heavy coal tar is a byproduct obtained through the distillation and steam cracking of coal tar, with its asphalt content (boiling point above 360 °C) exceeding 50% [ 1 ]. It inherently contains a rich mixture of polycyclic aromatic hydrocarbons (PAHs), coke and volatiles, endowing it with significant value for high-value utilization [ 2 ]. The preparation of graphitized foam carbon represents a sustainable avenue for its utilization.…”

“…The preparation of graphitized foam carbon represents a sustainable avenue for its utilization. Such carbon materials find widespread applications in metallurgy, construction, textiles, papermaking and transportation, exhibiting promising prospects [ 2 , 3 , 4 ]. The ordered nature of the carbonaceous intermediate phase formed during the pyrolysis of heavy tar is a crucial factor influencing the performance of graphitized foam carbon [ 5 ].…”

“…Graphitization represents the transition from amorphous to crystalline state, signifying a transformation at the microscopic level where the carbon atom arrangement evolves from disorderly to orderly [24,25]. The carbonaceous mesophase contains various aromatic formats with many sp 2 -hybridized carbon atoms, and the aromatic molecules are highly analogous to the ortho-hexagonal arrangement of carbon atoms in the graphite lattice. Therefore, the mesophase has the potential to be transformed into graphitic carbon materials [26][27][28].…”