The influence of addition of coal tar pitch (CTP) and expired pharmaceuticals (EP) on properties and composition of pyrolysis products for lower and higher rank coals

The Influence of Coal Tar Pitches on Thermal Behaviour of a High-Volatile Bituminous Polish Coal

“…These compounds are not extracted by the chloroform-methanol mixture but, despite this, they play the role of plasticisers of the organic substance of coal. A similar phenomenon of the influence of pitch on a decrease in the amount of polycyclic aromatic hydrocarbons in the material extracted from plasticized coals was stated in previous research [16]. The values of the yield of the material soluble in the chloroform-methanol mixture in Table 3 cannot be considered as dependent on the softening point of CTPs.…”

“…The CTP samples were ground to the grain size of <0.2 mm in diameter. The samples of 2 wt.% of CTP were prepared from the samples of coal and CTPs using the standard procedure of the manual mixing of powder ingredients previously described in [16].…”

“…These additives can be used as binders for briquettes with coals having worse caking properties [11][12][13][14]. CTPs extend the plasticity range and lower the softening temperature of coals [15,16].…”

“…However, in Nomura's opinion [17], CTP additives can reduce coking pressure. Previous research [16] showed that the addition of CTP to coals, having a distinct content of volatiles, changes the composition of the material extracted from them in different way. In this research, attention was attracted to the fact that the addition of CTP to coals as a material containing polycyclic aromatic hydrocarbons (PAHs) led to a decrease in content of these PAHs in the extracts of plasticized coal blends.…”